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ffmpeg/libavformat/hlsenc.c

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/*
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "config_components.h"
#include <stdint.h>
#include <time.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/random_seed.h"
#include "libavutil/time.h"
#include "libavutil/time_internal.h"
#include "libavcodec/defs.h"
#include "avformat.h"
#include "avio_internal.h"
#include "avc.h"
#if CONFIG_HTTP_PROTOCOL
#include "http.h"
#endif
#include "hlsplaylist.h"
#include "internal.h"
#include "mux.h"
#include "os_support.h"
#include "url.h"
typedef enum {
HLS_START_SEQUENCE_AS_START_NUMBER = 0,
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH = 3,
HLS_START_SEQUENCE_LAST, // unused
} StartSequenceSourceType;
typedef enum {
CODEC_ATTRIBUTE_WRITTEN = 0,
CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN,
} CodecAttributeStatus;
#define KEYSIZE 16
#define LINE_BUFFER_SIZE MAX_URL_SIZE
#define HLS_MICROSECOND_UNIT 1000000
#define BUFSIZE (16 * 1024)
#define POSTFIX_PATTERN "_%d"
typedef struct HLSSegment {
char filename[MAX_URL_SIZE];
char sub_filename[MAX_URL_SIZE];
double duration; /* in seconds */
int discont;
int64_t pos;
int64_t size;
int64_t keyframe_pos;
int64_t keyframe_size;
unsigned var_stream_idx;
char key_uri[LINE_BUFFER_SIZE + 1];
char iv_string[KEYSIZE*2 + 1];
struct HLSSegment *next;
double discont_program_date_time;
} HLSSegment;
typedef enum HLSFlags {
// Generate a single media file and use byte ranges in the playlist.
HLS_SINGLE_FILE = (1 << 0),
HLS_DELETE_SEGMENTS = (1 << 1),
HLS_ROUND_DURATIONS = (1 << 2),
HLS_DISCONT_START = (1 << 3),
HLS_OMIT_ENDLIST = (1 << 4),
HLS_SPLIT_BY_TIME = (1 << 5),
HLS_APPEND_LIST = (1 << 6),
HLS_PROGRAM_DATE_TIME = (1 << 7),
HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
HLS_TEMP_FILE = (1 << 11),
HLS_PERIODIC_REKEY = (1 << 12),
HLS_INDEPENDENT_SEGMENTS = (1 << 13),
HLS_I_FRAMES_ONLY = (1 << 14),
} HLSFlags;
typedef enum {
SEGMENT_TYPE_MPEGTS,
SEGMENT_TYPE_FMP4,
} SegmentType;
typedef struct VariantStream {
unsigned var_stream_idx;
unsigned number;
int64_t sequence;
const AVOutputFormat *oformat;
const AVOutputFormat *vtt_oformat;
AVIOContext *out;
AVIOContext *out_single_file;
int packets_written;
int init_range_length;
uint8_t *temp_buffer;
uint8_t *init_buffer;
AVFormatContext *avf;
AVFormatContext *vtt_avf;
int has_video;
int has_subtitle;
int new_start;
int start_pts_from_audio;
double dpp; // duration per packet
int64_t start_pts;
int64_t end_pts;
int64_t video_lastpos;
int64_t video_keyframe_pos;
int64_t video_keyframe_size;
double duration; // last segment duration computed so far, in seconds
int64_t start_pos; // last segment starting position
int64_t size; // last segment size
int nb_entries;
int discontinuity_set;
int discontinuity;
int reference_stream_index;
HLSSegment *segments;
HLSSegment *last_segment;
HLSSegment *old_segments;
char *basename_tmp;
char *basename;
char *vtt_basename;
char *vtt_m3u8_name;
char *m3u8_name;
double initial_prog_date_time;
char current_segment_final_filename_fmt[MAX_URL_SIZE]; // when renaming segments
char *fmp4_init_filename;
char *base_output_dirname;
int encrypt_started;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVStream **streams;
char codec_attr[128];
CodecAttributeStatus attr_status;
unsigned int nb_streams;
int m3u8_created; /* status of media play-list creation */
int is_default; /* default status of audio group */
const char *language; /* audio language name */
const char *agroup; /* audio group name */
const char *sgroup; /* subtitle group name */
const char *ccgroup; /* closed caption group name */
const char *varname; /* variant name */
} VariantStream;
typedef struct ClosedCaptionsStream {
const char *ccgroup; /* closed caption group name */
const char *instreamid; /* closed captions INSTREAM-ID */
const char *language; /* closed captions language */
} ClosedCaptionsStream;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
int64_t start_sequence;
uint32_t start_sequence_source_type; // enum StartSequenceSourceType
int64_t time; // Set by a private option.
int64_t init_time; // Set by a private option.
int max_nb_segments; // Set by a private option.
int hls_delete_threshold; // Set by a private option.
uint32_t flags; // enum HLSFlags
uint32_t pl_type; // enum PlaylistType
char *segment_filename;
char *fmp4_init_filename;
int segment_type;
int resend_init_file; ///< resend init file into disk after refresh m3u8
int use_localtime; ///< flag to expand filename with localtime
int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
int allowcache;
int64_t recording_time;
int64_t max_seg_size; // every segment file max size
char *baseurl;
char *vtt_format_options_str;
char *subtitle_filename;
AVDictionary *format_options;
int encrypt;
char *key;
char *key_url;
char *iv;
char *key_basename;
int encrypt_started;
char *key_info_file;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVDictionary *vtt_format_options;
char *method;
char *user_agent;
VariantStream *var_streams;
unsigned int nb_varstreams;
ClosedCaptionsStream *cc_streams;
unsigned int nb_ccstreams;
int master_m3u8_created; /* status of master play-list creation */
char *master_m3u8_url; /* URL of the master m3u8 file */
int version; /* HLS version */
char *var_stream_map; /* user specified variant stream map string */
char *cc_stream_map; /* user specified closed caption streams map string */
char *master_pl_name;
unsigned int master_publish_rate;
int http_persistent;
AVIOContext *m3u8_out;
AVIOContext *sub_m3u8_out;
AVIOContext *http_delete;
int64_t timeout;
int ignore_io_errors;
char *headers;
int has_default_key; /* has DEFAULT field of var_stream_map */
int has_video_m3u8; /* has video stream m3u8 list */
} HLSContext;
static int strftime_expand(const char *fmt, char **dest)
{
int r = 1;
time_t now0;
struct tm *tm, tmpbuf;
char *buf;
buf = av_mallocz(MAX_URL_SIZE);
if (!buf)
return AVERROR(ENOMEM);
time(&now0);
tm = localtime_r(&now0, &tmpbuf);
r = strftime(buf, MAX_URL_SIZE, fmt, tm);
if (!r) {
av_free(buf);
return AVERROR(EINVAL);
}
*dest = buf;
return r;
}
static int hlsenc_io_open(AVFormatContext *s, AVIOContext **pb, const char *filename,
AVDictionary **options)
{
HLSContext *hls = s->priv_data;
int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
int err = AVERROR_MUXER_NOT_FOUND;
if (!*pb || !http_base_proto || !hls->http_persistent) {
err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
#if CONFIG_HTTP_PROTOCOL
} else {
URLContext *http_url_context = ffio_geturlcontext(*pb);
av_assert0(http_url_context);
err = ff_http_do_new_request(http_url_context, filename);
if (err < 0)
ff_format_io_close(s, pb);
#endif
}
return err;
}
static int hlsenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename)
{
HLSContext *hls = s->priv_data;
int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
int ret = 0;
if (!*pb)
return ret;
if (!http_base_proto || !hls->http_persistent || hls->key_info_file || hls->encrypt) {
ff_format_io_close(s, pb);
#if CONFIG_HTTP_PROTOCOL
} else {
URLContext *http_url_context = ffio_geturlcontext(*pb);
av_assert0(http_url_context);
avio_flush(*pb);
ret = ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
#endif
}
return ret;
}
static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
{
int http_base_proto = ff_is_http_proto(s->url);
if (c->method) {
av_dict_set(options, "method", c->method, 0);
} else if (http_base_proto) {
av_dict_set(options, "method", "PUT", 0);
}
if (c->user_agent)
av_dict_set(options, "user_agent", c->user_agent, 0);
if (c->http_persistent)
av_dict_set_int(options, "multiple_requests", 1, 0);
if (c->timeout >= 0)
av_dict_set_int(options, "timeout", c->timeout, 0);
if (c->headers)
av_dict_set(options, "headers", c->headers, 0);
}
static void write_codec_attr(AVStream *st, VariantStream *vs)
{
int codec_strlen = strlen(vs->codec_attr);
char attr[32];
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
return;
if (vs->attr_status == CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN)
return;
if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
uint8_t *data = st->codecpar->extradata;
if (data) {
const uint8_t *p;
if (AV_RB32(data) == 0x01 && (data[4] & 0x1F) == 7)
p = &data[5];
else if (AV_RB24(data) == 0x01 && (data[3] & 0x1F) == 7)
p = &data[4];
else if (data[0] == 0x01) /* avcC */
p = &data[1];
else
goto fail;
snprintf(attr, sizeof(attr),
"avc1.%02x%02x%02x", p[0], p[1], p[2]);
} else {
goto fail;
}
} else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
uint8_t *data = st->codecpar->extradata;
int profile = AV_PROFILE_UNKNOWN;
int level = AV_LEVEL_UNKNOWN;
if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
profile = st->codecpar->profile;
if (st->codecpar->level != AV_LEVEL_UNKNOWN)
level = st->codecpar->level;
/* check the boundary of data which from current position is small than extradata_size */
while (data && (data - st->codecpar->extradata + 19) < st->codecpar->extradata_size) {
/* get HEVC SPS NAL and seek to profile_tier_level */
if (!(data[0] | data[1] | data[2]) && data[3] == 1 && ((data[4] & 0x7E) == 0x42)) {
uint8_t *rbsp_buf;
int remain_size = 0;
int rbsp_size = 0;
/* skip start code + nalu header */
data += 6;
/* process by reference General NAL unit syntax */
remain_size = st->codecpar->extradata_size - (data - st->codecpar->extradata);
rbsp_buf = ff_nal_unit_extract_rbsp(data, remain_size, &rbsp_size, 0);
if (!rbsp_buf)
return;
if (rbsp_size < 13) {
av_freep(&rbsp_buf);
break;
}
/* skip sps_video_parameter_set_id u(4),
* sps_max_sub_layers_minus1 u(3),
* and sps_temporal_id_nesting_flag u(1) */
profile = rbsp_buf[1] & 0x1f;
/* skip 8 + 8 + 32 + 4 + 43 + 1 bit */
level = rbsp_buf[12];
av_freep(&rbsp_buf);
break;
}
data++;
}
if (st->codecpar->codec_tag == MKTAG('h','v','c','1') &&
profile != AV_PROFILE_UNKNOWN &&
level != AV_LEVEL_UNKNOWN) {
snprintf(attr, sizeof(attr), "%s.%d.4.L%d.B01", av_fourcc2str(st->codecpar->codec_tag), profile, level);
} else
goto fail;
} else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
snprintf(attr, sizeof(attr), "mp4a.40.33");
} else if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
snprintf(attr, sizeof(attr), "mp4a.40.34");
} else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
snprintf(attr, sizeof(attr), "mp4a.40.%d", st->codecpar->profile+1);
else
// This is for backward compatibility with the previous implementation.
snprintf(attr, sizeof(attr), "mp4a.40.2");
} else if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
snprintf(attr, sizeof(attr), "ac-3");
} else if (st->codecpar->codec_id == AV_CODEC_ID_EAC3) {
snprintf(attr, sizeof(attr), "ec-3");
} else {
goto fail;
}
// Don't write the same attribute multiple times
if (!av_stristr(vs->codec_attr, attr)) {
snprintf(vs->codec_attr + codec_strlen,
sizeof(vs->codec_attr) - codec_strlen,
"%s%s", codec_strlen ? "," : "", attr);
}
return;
fail:
vs->codec_attr[0] = '\0';
vs->attr_status = CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN;
return;
}
static int replace_str_data_in_filename(char **s, const char *filename, char placeholder, const char *datastring)
{
const char *p;
char c;
int addchar_count;
int found_count = 0;
AVBPrint buf;
int ret;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && *(p+1) == placeholder) {
av_bprintf(&buf, "%s", datastring);
p += 2;
addchar_count = 0;
found_count ++;
} else
addchar_count = 1;
if (addchar_count > 0) {
av_bprint_append_data(&buf, p, addchar_count);
p += addchar_count;
}
}
if (!av_bprint_is_complete(&buf)) {
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
if ((ret = av_bprint_finalize(&buf, s)) < 0)
return ret;
return found_count;
}
static int replace_int_data_in_filename(char **s, const char *filename, char placeholder, int64_t number)
{
const char *p;
char c;
int nd, addchar_count;
int found_count = 0;
AVBPrint buf;
int ret;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
nd = 0;
addchar_count = 1;
while (av_isdigit(*(p + addchar_count))) {
nd = nd * 10 + *(p + addchar_count) - '0';
addchar_count++;
}
if (*(p + addchar_count) == placeholder) {
av_bprintf(&buf, "%0*"PRId64, (number < 0) ? nd : nd++, number);
p += (addchar_count + 1);
addchar_count = 0;
found_count++;
}
} else
addchar_count = 1;
av_bprint_append_data(&buf, p, addchar_count);
p += addchar_count;
}
if (!av_bprint_is_complete(&buf)) {
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
if ((ret = av_bprint_finalize(&buf, s)) < 0)
return ret;
return found_count;
}
static void write_styp(AVIOContext *pb)
{
avio_wb32(pb, 24);
ffio_wfourcc(pb, "styp");
ffio_wfourcc(pb, "msdh");
avio_wb32(pb, 0); /* minor */
ffio_wfourcc(pb, "msdh");
ffio_wfourcc(pb, "msix");
}
static int flush_dynbuf(VariantStream *vs, int *range_length)
{
AVFormatContext *ctx = vs->avf;
if (!ctx->pb) {
return AVERROR(EINVAL);
}
// flush
av_write_frame(ctx, NULL);
// write out to file
*range_length = avio_close_dyn_buf(ctx->pb, &vs->temp_buffer);
ctx->pb = NULL;
avio_write(vs->out, vs->temp_buffer, *range_length);
avio_flush(vs->out);
// re-open buffer
return avio_open_dyn_buf(&ctx->pb);
}
static void reflush_dynbuf(VariantStream *vs, int *range_length)
{
// re-open buffer
avio_write(vs->out, vs->temp_buffer, *range_length);
}
#if HAVE_DOS_PATHS
#define SEPARATOR '\\'
#else
#define SEPARATOR '/'
#endif
static int hls_delete_file(HLSContext *hls, AVFormatContext *avf,
char *path, const char *proto)
{
if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
AVDictionary *opt = NULL;
int ret;
set_http_options(avf, &opt, hls);
av_dict_set(&opt, "method", "DELETE", 0);
ret = hlsenc_io_open(avf, &hls->http_delete, path, &opt);
av_dict_free(&opt);
if (ret < 0)
return hls->ignore_io_errors ? 1 : ret;
//Nothing to write
hlsenc_io_close(avf, &hls->http_delete, path);
} else if (unlink(path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
path, strerror(errno));
}
return 0;
}
static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
VariantStream *vs)
{
HLSSegment *segment, *previous_segment = NULL;
float playlist_duration = 0.0f;
int ret = 0;
int segment_cnt = 0;
AVBPrint path;
const char *dirname = NULL;
char *dirname_r = NULL;
char *dirname_repl = NULL;
const char *vtt_dirname = NULL;
char *vtt_dirname_r = NULL;
const char *proto = NULL;
av_bprint_init(&path, 0, AV_BPRINT_SIZE_UNLIMITED);
segment = vs->segments;
while (segment) {
playlist_duration += segment->duration;
segment = segment->next;
}
segment = vs->old_segments;
segment_cnt = 0;
while (segment) {
playlist_duration -= segment->duration;
previous_segment = segment;
segment = previous_segment->next;
segment_cnt++;
if (playlist_duration <= -previous_segment->duration) {
previous_segment->next = NULL;
break;
}
if (segment_cnt >= hls->hls_delete_threshold) {
previous_segment->next = NULL;
break;
}
}
if (segment && !hls->use_localtime_mkdir) {
dirname_r = hls->segment_filename ? av_strdup(hls->segment_filename): av_strdup(vs->avf->url);
dirname = av_dirname(dirname_r);
}
/* if %v is present in the file's directory
* all segment belongs to the same variant, so do it only once before the loop*/
if (dirname && av_stristr(dirname, "%v")) {
if (!vs->varname) {
if (replace_int_data_in_filename(&dirname_repl, dirname, 'v', segment->var_stream_idx) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
} else {
if (replace_str_data_in_filename(&dirname_repl, dirname, 'v', vs->varname) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
}
dirname = dirname_repl;
}
while (segment) {
av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
segment->filename);
if (!hls->use_localtime_mkdir) // segment->filename contains basename only
av_bprintf(&path, "%s%c", dirname, SEPARATOR);
av_bprintf(&path, "%s", segment->filename);
if (!av_bprint_is_complete(&path)) {
ret = AVERROR(ENOMEM);
goto fail;
}
proto = avio_find_protocol_name(s->url);
if (ret = hls_delete_file(hls, s, path.str, proto))
goto fail;
if ((segment->sub_filename[0] != '\0')) {
vtt_dirname_r = av_strdup(vs->vtt_avf->url);
vtt_dirname = av_dirname(vtt_dirname_r);
av_bprint_clear(&path);
av_bprintf(&path, "%s%c%s", vtt_dirname, SEPARATOR,
segment->sub_filename);
av_freep(&vtt_dirname_r);
if (!av_bprint_is_complete(&path)) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (ret = hls_delete_file(hls, s, path.str, proto))
goto fail;
}
av_bprint_clear(&path);
previous_segment = segment;
segment = previous_segment->next;
av_freep(&previous_segment);
}
fail:
av_bprint_finalize(&path, NULL);
av_freep(&dirname_r);
av_freep(&dirname_repl);
return ret;
}
static int do_encrypt(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
int ret;
int len;
AVIOContext *pb;
uint8_t key[KEYSIZE];
char * key_basename_source = (hls->master_m3u8_url) ? hls->master_m3u8_url : s->url;
len = strlen(key_basename_source) + 4 + 1;
hls->key_basename = av_mallocz(len);
if (!hls->key_basename)
return AVERROR(ENOMEM);
av_strlcpy(hls->key_basename, key_basename_source, len);
av_strlcat(hls->key_basename, ".key", len);
if (hls->key_url) {
av_strlcpy(hls->key_file, hls->key_url, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_url, sizeof(hls->key_uri));
} else {
av_strlcpy(hls->key_file, hls->key_basename, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_basename, sizeof(hls->key_uri));
}
if (!*hls->iv_string) {
uint8_t iv[16] = { 0 };
char buf[33];
if (!hls->iv) {
AV_WB64(iv + 8, vs->sequence);
} else {
memcpy(iv, hls->iv, sizeof(iv));
}
ff_data_to_hex(buf, iv, sizeof(iv), 0);
memcpy(hls->iv_string, buf, sizeof(hls->iv_string));
}
if (!*hls->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_string) {
AVDictionary *options = NULL;
if (!hls->key) {
if ((ret = av_random_bytes(key, sizeof(key))) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot generate a strong random key\n");
return ret;
}
} else {
memcpy(key, hls->key, sizeof(key));
}
ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_WRITE, &options);
av_dict_free(&options);
if (ret < 0)
return ret;
avio_seek(pb, 0, SEEK_CUR);
avio_write(pb, key, KEYSIZE);
avio_close(pb);
}
return 0;
}
static int hls_encryption_start(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
int ret;
AVIOContext *pb;
uint8_t key[KEYSIZE];
AVDictionary *options = NULL;
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, &options);
av_dict_free(&options);
if (ret < 0) {
av_log(hls, AV_LOG_ERROR,
"error opening key info file %s\n", hls->key_info_file);
return ret;
}
ff_get_line(pb, vs->key_uri, sizeof(vs->key_uri));
vs->key_uri[strcspn(vs->key_uri, "\r\n")] = '\0';
ff_get_line(pb, vs->key_file, sizeof(vs->key_file));
vs->key_file[strcspn(vs->key_file, "\r\n")] = '\0';
ff_get_line(pb, vs->iv_string, sizeof(vs->iv_string));
vs->iv_string[strcspn(vs->iv_string, "\r\n")] = '\0';
ff_format_io_close(s, &pb);
if (!*vs->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*vs->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, vs->key_file, AVIO_FLAG_READ, &options);
av_dict_free(&options);
if (ret < 0) {
av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", vs->key_file);
return ret;
}
ret = avio_read(pb, key, sizeof(key));
ff_format_io_close(s, &pb);
if (ret != sizeof(key)) {
av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", vs->key_file);
if (ret >= 0 || ret == AVERROR_EOF)
ret = AVERROR(EINVAL);
return ret;
}
ff_data_to_hex(vs->key_string, key, sizeof(key), 0);
return 0;
}
static int hls_mux_init(AVFormatContext *s, VariantStream *vs)
{
AVDictionary *options = NULL;
HLSContext *hls = s->priv_data;
AVFormatContext *oc;
AVFormatContext *vtt_oc = NULL;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
int remaining_options;
int i, ret;
ret = avformat_alloc_output_context2(&vs->avf, vs->oformat, NULL, NULL);
if (ret < 0)
return ret;
oc = vs->avf;
oc->url = av_strdup("");
if (!oc->url)
return AVERROR(ENOMEM);
oc->interrupt_callback = s->interrupt_callback;
oc->max_delay = s->max_delay;
oc->opaque = s->opaque;
oc->io_open = s->io_open;
#if FF_API_AVFORMAT_IO_CLOSE
FF_DISABLE_DEPRECATION_WARNINGS
oc->io_close = s->io_close;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
oc->io_close2 = s->io_close2;
oc->strict_std_compliance = s->strict_std_compliance;
av_dict_copy(&oc->metadata, s->metadata, 0);
if (vs->vtt_oformat) {
ret = avformat_alloc_output_context2(&vs->vtt_avf, vs->vtt_oformat, NULL, NULL);
if (ret < 0)
return ret;
vtt_oc = vs->vtt_avf;
av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
}
for (i = 0; i < vs->nb_streams; i++) {
AVStream *st;
AVFormatContext *loc;
if (vs->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
loc = vtt_oc;
else
loc = oc;
if (!(st = avformat_new_stream(loc, NULL)))
return AVERROR(ENOMEM);
avcodec_parameters_copy(st->codecpar, vs->streams[i]->codecpar);
if (!oc->oformat->codec_tag ||
av_codec_get_id (oc->oformat->codec_tag, vs->streams[i]->codecpar->codec_tag) == st->codecpar->codec_id ||
av_codec_get_tag(oc->oformat->codec_tag, vs->streams[i]->codecpar->codec_id) <= 0) {
st->codecpar->codec_tag = vs->streams[i]->codecpar->codec_tag;
} else {
st->codecpar->codec_tag = 0;
}
st->sample_aspect_ratio = vs->streams[i]->sample_aspect_ratio;
st->time_base = vs->streams[i]->time_base;
av_dict_copy(&st->metadata, vs->streams[i]->metadata, 0);
st->id = vs->streams[i]->id;
}
vs->start_pos = 0;
vs->new_start = 1;
if (hls->segment_type == SEGMENT_TYPE_FMP4 && hls->max_seg_size > 0) {
if (hls->http_persistent > 0) {
//TODO: Support fragment fmp4 for http persistent in HLS muxer.
av_log(s, AV_LOG_WARNING, "http persistent mode is currently unsupported for fragment mp4 in the HLS muxer.\n");
}
if (hls->max_seg_size > 0) {
av_log(s, AV_LOG_WARNING, "Multi-file byterange mode is currently unsupported in the HLS muxer.\n");
return AVERROR_PATCHWELCOME;
}
}
if ((ret = avio_open_dyn_buf(&oc->pb)) < 0)
return ret;
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
set_http_options(s, &options, hls);
if (byterange_mode) {
ret = hlsenc_io_open(s, &vs->out, vs->basename, &options);
} else {
ret = hlsenc_io_open(s, &vs->out, vs->base_output_dirname, &options);
}
av_dict_free(&options);
}
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", vs->fmp4_init_filename);
return ret;
}
av_dict_copy(&options, hls->format_options, 0);
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
av_dict_set(&options, "fflags", "-autobsf", 0);
av_dict_set(&options, "movflags", "+frag_custom+dash+delay_moov", AV_DICT_APPEND);
} else {
/* We only require one PAT/PMT per segment. */
char period[21];
snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
av_dict_set(&options, "sdt_period", period, AV_DICT_DONT_OVERWRITE);
av_dict_set(&options, "pat_period", period, AV_DICT_DONT_OVERWRITE);
}
ret = avformat_init_output(oc, &options);
remaining_options = av_dict_count(options);
av_dict_free(&options);
if (ret < 0)
return ret;
if (remaining_options) {
av_log(s, AV_LOG_ERROR, "Some of the provided format options are not recognized\n");
return AVERROR(EINVAL);
}
avio_flush(oc->pb);
return 0;
}
static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
{
while (segment) {
if (!av_strcasecmp(segment->filename,filename))
return segment;
segment = segment->next;
}
return (HLSSegment *) NULL;
}
static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls,
VariantStream *vs, HLSSegment *en,
double duration, int64_t pos, int64_t size)
{
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(vs->current_segment_final_filename_fmt)) {
char * new_url = av_strdup(vs->current_segment_final_filename_fmt);
if (!new_url) {
return AVERROR(ENOMEM);
}
ff_format_set_url(vs->avf, new_url);
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, vs->avf->url, 's', pos + size) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
vs->avf->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(vs->avf, filename);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, vs->avf->url,
't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_duration flag\n",
vs->avf->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(vs->avf, filename);
}
}
return 0;
}
static int sls_flag_check_duration_size_index(HLSContext *hls)
{
int ret = 0;
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag requires strftime to be true\n");
ret = AVERROR(EINVAL);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag requires strfime to be true\n");
ret = AVERROR(EINVAL);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_index hls_flag requires strftime to be true\n");
ret = AVERROR(EINVAL);
}
return ret;
}
static int sls_flag_check_duration_size(HLSContext *hls, VariantStream *vs)
{
const char *proto = avio_find_protocol_name(vs->basename);
int segment_renaming_ok = proto && !strcmp(proto, "file");
int ret = 0;
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
}
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
}
return ret;
}
static void sls_flag_file_rename(HLSContext *hls, VariantStream *vs, char *old_filename) {
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(vs->current_segment_final_filename_fmt)) {
ff_rename(old_filename, vs->avf->url, hls);
}
}
static int sls_flag_use_localtime_filename(AVFormatContext *oc, HLSContext *c, VariantStream *vs)
{
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename,
oc->url, 'd', vs->sequence) < 1) {
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_index flag\n",
oc->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(oc, filename);
}
if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
av_strlcpy(vs->current_segment_final_filename_fmt, oc->url,
sizeof(vs->current_segment_final_filename_fmt));
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, oc->url, 's', 0) < 1) {
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
oc->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(oc, filename);
}
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, oc->url, 't', 0) < 1) {
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_duration flag\n",
oc->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(oc, filename);
}
}
return 0;
}
/* Create a new segment and append it to the segment list */
static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls,
VariantStream *vs, double duration, int64_t pos,
int64_t size)
{
HLSSegment *en = av_malloc(sizeof(*en));
const char *filename;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
int ret;
if (!en)
return AVERROR(ENOMEM);
en->var_stream_idx = vs->var_stream_idx;
ret = sls_flags_filename_process(s, hls, vs, en, duration, pos, size);
if (ret < 0) {
av_freep(&en);
return ret;
}
filename = av_basename(vs->avf->url);
if (hls->use_localtime_mkdir) {
filename = vs->avf->url;
}
if ((find_segment_by_filename(vs->segments, filename) || find_segment_by_filename(vs->old_segments, filename))
&& !byterange_mode) {
av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
}
av_strlcpy(en->filename, filename, sizeof(en->filename));
if (vs->has_subtitle)
av_strlcpy(en->sub_filename, av_basename(vs->vtt_avf->url), sizeof(en->sub_filename));
else
en->sub_filename[0] = '\0';
en->duration = duration;
en->pos = pos;
en->size = size;
en->keyframe_pos = vs->video_keyframe_pos;
en->keyframe_size = vs->video_keyframe_size;
en->next = NULL;
en->discont = 0;
en->discont_program_date_time = 0;
if (vs->discontinuity) {
en->discont = 1;
vs->discontinuity = 0;
}
if (hls->key_info_file || hls->encrypt) {
av_strlcpy(en->key_uri, vs->key_uri, sizeof(en->key_uri));
av_strlcpy(en->iv_string, vs->iv_string, sizeof(en->iv_string));
}
if (!vs->segments)
vs->segments = en;
else
vs->last_segment->next = en;
vs->last_segment = en;
// EVENT or VOD playlists imply sliding window cannot be used
if (hls->pl_type != PLAYLIST_TYPE_NONE)
hls->max_nb_segments = 0;
if (hls->max_nb_segments && vs->nb_entries >= hls->max_nb_segments) {
en = vs->segments;
if (!en->next->discont_program_date_time && !en->discont_program_date_time)
vs->initial_prog_date_time += en->duration;
vs->segments = en->next;
if (en && hls->flags & HLS_DELETE_SEGMENTS &&
!(hls->flags & HLS_SINGLE_FILE)) {
en->next = vs->old_segments;
vs->old_segments = en;
if ((ret = hls_delete_old_segments(s, hls, vs)) < 0)
return ret;
} else
av_freep(&en);
} else
vs->nb_entries++;
if (hls->max_seg_size > 0) {
return 0;
}
vs->sequence++;
return 0;
}
static int parse_playlist(AVFormatContext *s, const char *url, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
AVIOContext *in;
int ret = 0, is_segment = 0;
int64_t new_start_pos;
char line[MAX_URL_SIZE];
const char *ptr;
const char *end;
double discont_program_date_time = 0;
if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
&s->interrupt_callback, NULL,
s->protocol_whitelist, s->protocol_blacklist)) < 0)
return ret;
ff_get_chomp_line(in, line, sizeof(line));
if (strcmp(line, "#EXTM3U")) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
vs->discontinuity = 0;
while (!avio_feof(in)) {
ff_get_chomp_line(in, line, sizeof(line));
if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
int64_t tmp_sequence = strtoll(ptr, NULL, 10);
if (tmp_sequence < vs->sequence)
av_log(hls, AV_LOG_VERBOSE,
"Found playlist sequence number was smaller """
"than specified start sequence number: %"PRId64" < %"PRId64", "
"omitting\n", tmp_sequence, hls->start_sequence);
else {
av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
vs->sequence = tmp_sequence;
}
} else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
is_segment = 1;
vs->discontinuity = 1;
} else if (av_strstart(line, "#EXTINF:", &ptr)) {
is_segment = 1;
vs->duration = atof(ptr);
} else if (av_stristart(line, "#EXT-X-KEY:", &ptr)) {
ptr = av_stristr(line, "URI=\"");
if (ptr) {
ptr += strlen("URI=\"");
end = av_stristr(ptr, ",");
if (end) {
av_strlcpy(vs->key_uri, ptr, end - ptr);
} else {
av_strlcpy(vs->key_uri, ptr, sizeof(vs->key_uri));
}
}
ptr = av_stristr(line, "IV=0x");
if (ptr) {
ptr += strlen("IV=0x");
end = av_stristr(ptr, ",");
if (end) {
av_strlcpy(vs->iv_string, ptr, end - ptr);
} else {
av_strlcpy(vs->iv_string, ptr, sizeof(vs->iv_string));
}
}
} else if (av_strstart(line, "#EXT-X-PROGRAM-DATE-TIME:", &ptr)) {
struct tm program_date_time;
int y,M,d,h,m,s;
double ms;
if (sscanf(ptr, "%d-%d-%dT%d:%d:%d.%lf", &y, &M, &d, &h, &m, &s, &ms) != 7) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
program_date_time.tm_year = y - 1900;
program_date_time.tm_mon = M - 1;
program_date_time.tm_mday = d;
program_date_time.tm_hour = h;
program_date_time.tm_min = m;
program_date_time.tm_sec = s;
program_date_time.tm_isdst = -1;
discont_program_date_time = mktime(&program_date_time);
discont_program_date_time += (double)(ms / 1000);
} else if (av_strstart(line, "#", NULL)) {
continue;
} else if (line[0]) {
if (is_segment) {
char *new_file = av_strdup(line);
if (!new_file) {
ret = AVERROR(ENOMEM);
goto fail;
}
ff_format_set_url(vs->avf, new_file);
is_segment = 0;
new_start_pos = avio_tell(vs->avf->pb);
vs->size = new_start_pos - vs->start_pos;
ret = hls_append_segment(s, hls, vs, vs->duration, vs->start_pos, vs->size);
if (discont_program_date_time) {
vs->last_segment->discont_program_date_time = discont_program_date_time;
discont_program_date_time += vs->duration;
}
if (ret < 0)
goto fail;
vs->start_pos = new_start_pos;
}
}
}
fail:
avio_close(in);
return ret;
}
static void hls_free_segments(HLSSegment *p)
{
HLSSegment *en;
while (p) {
en = p;
p = p->next;
av_freep(&en);
}
}
static int hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
{
size_t len = strlen(oc->url);
char *final_filename = av_strdup(oc->url);
int ret;
if (!final_filename)
return AVERROR(ENOMEM);
final_filename[len-4] = '\0';
ret = ff_rename(oc->url, final_filename, s);
oc->url[len-4] = '\0';
av_freep(&final_filename);
return ret;
}
static const char* get_relative_url(const char *master_url, const char *media_url)
{
const char *p = strrchr(master_url, '/');
size_t base_len = 0;
if (!p) p = strrchr(master_url, '\\');
if (p) {
base_len = p - master_url;
if (av_strncasecmp(master_url, media_url, base_len)) {
av_log(NULL, AV_LOG_WARNING, "Unable to find relative url\n");
return NULL;
}
} else {
return media_url;
}
return media_url + base_len + 1;
}
static int64_t get_stream_bit_rate(AVStream *stream)
{
const AVPacketSideData *sd = av_packet_side_data_get(
stream->codecpar->coded_side_data, stream->codecpar->nb_coded_side_data,
AV_PKT_DATA_CPB_PROPERTIES
);
if (stream->codecpar->bit_rate)
return stream->codecpar->bit_rate;
else if (sd) {
AVCPBProperties *props = (AVCPBProperties*)sd->data;
return props->max_bitrate;
}
return 0;
}
static int create_master_playlist(AVFormatContext *s,
VariantStream * const input_vs)
{
HLSContext *hls = s->priv_data;
VariantStream *vs, *temp_vs;
AVStream *vid_st, *aud_st;
AVDictionary *options = NULL;
unsigned int i, j;
int ret, bandwidth;
const char *m3u8_rel_name = NULL;
const char *vtt_m3u8_rel_name = NULL;
const char *ccgroup;
const char *sgroup = NULL;
ClosedCaptionsStream *ccs;
const char *proto = avio_find_protocol_name(hls->master_m3u8_url);
int is_file_proto = proto && !strcmp(proto, "file");
int use_temp_file = is_file_proto && ((hls->flags & HLS_TEMP_FILE) || hls->master_publish_rate);
char temp_filename[MAX_URL_SIZE];
int nb_channels;
input_vs->m3u8_created = 1;
if (!hls->master_m3u8_created) {
/* For the first time, wait until all the media playlists are created */
for (i = 0; i < hls->nb_varstreams; i++)
if (!hls->var_streams[i].m3u8_created)
return 0;
} else {
/* Keep publishing the master playlist at the configured rate */
if (&hls->var_streams[0] != input_vs || !hls->master_publish_rate ||
input_vs->number % hls->master_publish_rate)
return 0;
}
set_http_options(s, &options, hls);
snprintf(temp_filename, sizeof(temp_filename), use_temp_file ? "%s.tmp" : "%s", hls->master_m3u8_url);
ret = hlsenc_io_open(s, &hls->m3u8_out, temp_filename, &options);
av_dict_free(&options);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open master play list file '%s'\n",
temp_filename);
goto fail;
}
ff_hls_write_playlist_version(hls->m3u8_out, hls->version);
for (i = 0; i < hls->nb_ccstreams; i++) {
ccs = &(hls->cc_streams[i]);
avio_printf(hls->m3u8_out, "#EXT-X-MEDIA:TYPE=CLOSED-CAPTIONS");
avio_printf(hls->m3u8_out, ",GROUP-ID=\"%s\"", ccs->ccgroup);
avio_printf(hls->m3u8_out, ",NAME=\"%s\"", ccs->instreamid);
if (ccs->language)
avio_printf(hls->m3u8_out, ",LANGUAGE=\"%s\"", ccs->language);
avio_printf(hls->m3u8_out, ",INSTREAM-ID=\"%s\"\n", ccs->instreamid);
}
/* For audio only variant streams add #EXT-X-MEDIA tag with attributes*/
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &(hls->var_streams[i]);
if (vs->has_video || vs->has_subtitle || !vs->agroup)
continue;
m3u8_rel_name = get_relative_url(hls->master_m3u8_url, vs->m3u8_name);
if (!m3u8_rel_name) {
av_log(s, AV_LOG_ERROR, "Unable to find relative URL\n");
goto fail;
}
nb_channels = 0;
for (j = 0; j < vs->nb_streams; j++)
if (vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
if (vs->streams[j]->codecpar->ch_layout.nb_channels > nb_channels)
nb_channels = vs->streams[j]->codecpar->ch_layout.nb_channels;
ff_hls_write_audio_rendition(hls->m3u8_out, vs->agroup, m3u8_rel_name, vs->language, i, hls->has_default_key ? vs->is_default : 1, nb_channels);
}
/* For variant streams with video add #EXT-X-STREAM-INF tag with attributes*/
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &(hls->var_streams[i]);
m3u8_rel_name = get_relative_url(hls->master_m3u8_url, vs->m3u8_name);
if (!m3u8_rel_name) {
av_log(s, AV_LOG_ERROR, "Unable to find relative URL\n");
goto fail;
}
vid_st = NULL;
aud_st = NULL;
for (j = 0; j < vs->nb_streams; j++) {
if (vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
vid_st = vs->streams[j];
else if (vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
aud_st = vs->streams[j];
}
if (!vid_st && !aud_st) {
av_log(s, AV_LOG_WARNING, "Media stream not found\n");
continue;
}
/**
* Traverse through the list of audio only rendition streams and find
* the rendition which has highest bitrate in the same audio group
*/
if (vs->agroup) {
for (j = 0; j < hls->nb_varstreams; j++) {
temp_vs = &(hls->var_streams[j]);
if (!temp_vs->has_video && !temp_vs->has_subtitle &&
temp_vs->agroup &&
!av_strcasecmp(temp_vs->agroup, vs->agroup)) {
if (!aud_st)
aud_st = temp_vs->streams[0];
if (temp_vs->streams[0]->codecpar->bit_rate >
aud_st->codecpar->bit_rate)
aud_st = temp_vs->streams[0];
}
}
}
bandwidth = 0;
if (vid_st)
bandwidth += get_stream_bit_rate(vid_st);
if (aud_st)
bandwidth += get_stream_bit_rate(aud_st);
bandwidth += bandwidth / 10;
ccgroup = NULL;
if (vid_st && vs->ccgroup) {
/* check if this group name is available in the cc map string */
for (j = 0; j < hls->nb_ccstreams; j++) {
ccs = &(hls->cc_streams[j]);
if (!av_strcasecmp(ccs->ccgroup, vs->ccgroup)) {
ccgroup = vs->ccgroup;
break;
}
}
if (j == hls->nb_ccstreams)
av_log(s, AV_LOG_WARNING, "mapping ccgroup %s not found\n",
vs->ccgroup);
}
if (vid_st && vs->sgroup) {
sgroup = vs->sgroup;
vtt_m3u8_rel_name = get_relative_url(hls->master_m3u8_url, vs->vtt_m3u8_name);
if (!vtt_m3u8_rel_name) {
av_log(s, AV_LOG_WARNING, "Unable to find relative subtitle URL\n");
break;
}
ff_hls_write_subtitle_rendition(hls->m3u8_out, sgroup, vtt_m3u8_rel_name, vs->language, i, hls->has_default_key ? vs->is_default : 1);
}
if (!hls->has_default_key || !hls->has_video_m3u8) {
ff_hls_write_stream_info(vid_st, hls->m3u8_out, bandwidth, m3u8_rel_name,
aud_st ? vs->agroup : NULL, vs->codec_attr, ccgroup, sgroup);
} else {
if (vid_st) {
ff_hls_write_stream_info(vid_st, hls->m3u8_out, bandwidth, m3u8_rel_name,
aud_st ? vs->agroup : NULL, vs->codec_attr, ccgroup, sgroup);
}
}
}
fail:
if (ret >=0)
hls->master_m3u8_created = 1;
hlsenc_io_close(s, &hls->m3u8_out, temp_filename);
if (use_temp_file)
ff_rename(temp_filename, hls->master_m3u8_url, s);
return ret;
}
static int hls_window(AVFormatContext *s, int last, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
HLSSegment *en;
int target_duration = 0;
int ret = 0;
char temp_filename[MAX_URL_SIZE];
char temp_vtt_filename[MAX_URL_SIZE];
int64_t sequence = FFMAX(hls->start_sequence, vs->sequence - vs->nb_entries);
const char *proto = avio_find_protocol_name(vs->m3u8_name);
int is_file_proto = proto && !strcmp(proto, "file");
int use_temp_file = is_file_proto && ((hls->flags & HLS_TEMP_FILE) || !(hls->pl_type == PLAYLIST_TYPE_VOD));
static unsigned warned_non_file;
char *key_uri = NULL;
char *iv_string = NULL;
AVDictionary *options = NULL;
double prog_date_time = vs->initial_prog_date_time;
double *prog_date_time_p = (hls->flags & HLS_PROGRAM_DATE_TIME) ? &prog_date_time : NULL;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
hls->version = 2;
if (!(hls->flags & HLS_ROUND_DURATIONS)) {
hls->version = 3;
}
if (byterange_mode) {
hls->version = 4;
sequence = 0;
}
if (hls->flags & HLS_I_FRAMES_ONLY) {
hls->version = 4;
}
if (hls->flags & HLS_INDEPENDENT_SEGMENTS) {
hls->version = 6;
}
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
hls->version = 7;
}
if (!is_file_proto && (hls->flags & HLS_TEMP_FILE) && !warned_non_file++)
av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
set_http_options(s, &options, hls);
snprintf(temp_filename, sizeof(temp_filename), use_temp_file ? "%s.tmp" : "%s", vs->m3u8_name);
ret = hlsenc_io_open(s, byterange_mode ? &hls->m3u8_out : &vs->out, temp_filename, &options);
av_dict_free(&options);
if (ret < 0) {
if (hls->ignore_io_errors)
ret = 0;
goto fail;
}
for (en = vs->segments; en; en = en->next) {
if (target_duration <= en->duration)
target_duration = lrint(en->duration);
}
vs->discontinuity_set = 0;
ff_hls_write_playlist_header(byterange_mode ? hls->m3u8_out : vs->out, hls->version, hls->allowcache,
target_duration, sequence, hls->pl_type, hls->flags & HLS_I_FRAMES_ONLY);
if ((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && vs->discontinuity_set==0) {
avio_printf(byterange_mode ? hls->m3u8_out : vs->out, "#EXT-X-DISCONTINUITY\n");
vs->discontinuity_set = 1;
}
if (vs->has_video && (hls->flags & HLS_INDEPENDENT_SEGMENTS)) {
avio_printf(byterange_mode ? hls->m3u8_out : vs->out, "#EXT-X-INDEPENDENT-SEGMENTS\n");
}
for (en = vs->segments; en; en = en->next) {
if ((hls->encrypt || hls->key_info_file) && (!key_uri || strcmp(en->key_uri, key_uri) ||
av_strcasecmp(en->iv_string, iv_string))) {
avio_printf(byterange_mode ? hls->m3u8_out : vs->out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
if (*en->iv_string)
avio_printf(byterange_mode ? hls->m3u8_out : vs->out, ",IV=0x%s", en->iv_string);
avio_printf(byterange_mode ? hls->m3u8_out : vs->out, "\n");
key_uri = en->key_uri;
iv_string = en->iv_string;
}
if ((hls->segment_type == SEGMENT_TYPE_FMP4) && (en == vs->segments)) {
ff_hls_write_init_file(byterange_mode ? hls->m3u8_out : vs->out, (hls->flags & HLS_SINGLE_FILE) ? en->filename : vs->fmp4_init_filename,
hls->flags & HLS_SINGLE_FILE, vs->init_range_length, 0);
}
ret = ff_hls_write_file_entry(byterange_mode ? hls->m3u8_out : vs->out, en->discont, byterange_mode,
en->duration, hls->flags & HLS_ROUND_DURATIONS,
en->size, en->pos, hls->baseurl,
en->filename,
en->discont_program_date_time ? &en->discont_program_date_time : prog_date_time_p,
en->keyframe_size, en->keyframe_pos, hls->flags & HLS_I_FRAMES_ONLY);
if (en->discont_program_date_time)
en->discont_program_date_time -= en->duration;
if (ret < 0) {
av_log(s, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
}
}
if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
ff_hls_write_end_list(byterange_mode ? hls->m3u8_out : vs->out);
if (vs->vtt_m3u8_name) {
set_http_options(vs->vtt_avf, &options, hls);
snprintf(temp_vtt_filename, sizeof(temp_vtt_filename), use_temp_file ? "%s.tmp" : "%s", vs->vtt_m3u8_name);
ret = hlsenc_io_open(s, &hls->sub_m3u8_out, temp_vtt_filename, &options);
av_dict_free(&options);
if (ret < 0) {
if (hls->ignore_io_errors)
ret = 0;
goto fail;
}
ff_hls_write_playlist_header(hls->sub_m3u8_out, hls->version, hls->allowcache,
target_duration, sequence, PLAYLIST_TYPE_NONE, 0);
for (en = vs->segments; en; en = en->next) {
ret = ff_hls_write_file_entry(hls->sub_m3u8_out, 0, byterange_mode,
en->duration, 0, en->size, en->pos,
hls->baseurl, en->sub_filename, NULL, 0, 0, 0);
if (ret < 0) {
av_log(s, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
}
}
if (last)
ff_hls_write_end_list(hls->sub_m3u8_out);
}
fail:
av_dict_free(&options);
ret = hlsenc_io_close(s, byterange_mode ? &hls->m3u8_out : &vs->out, temp_filename);
if (ret < 0) {
return ret;
}
hlsenc_io_close(s, &hls->sub_m3u8_out, vs->vtt_m3u8_name);
if (use_temp_file) {
ff_rename(temp_filename, vs->m3u8_name, s);
if (vs->vtt_m3u8_name)
ff_rename(temp_vtt_filename, vs->vtt_m3u8_name, s);
}
if (ret >= 0 && hls->master_pl_name)
if (create_master_playlist(s, vs) < 0)
av_log(s, AV_LOG_WARNING, "Master playlist creation failed\n");
return ret;
}
static int hls_start(AVFormatContext *s, VariantStream *vs)
{
HLSContext *c = s->priv_data;
AVFormatContext *oc = vs->avf;
AVFormatContext *vtt_oc = vs->vtt_avf;
AVDictionary *options = NULL;
const char *proto = NULL;
int use_temp_file = 0;
char iv_string[KEYSIZE*2 + 1];
int err = 0;
if (c->flags & HLS_SINGLE_FILE) {
char *new_name = av_strdup(vs->basename);
if (!new_name)
return AVERROR(ENOMEM);
ff_format_set_url(oc, new_name);
if (vs->vtt_basename) {
new_name = av_strdup(vs->vtt_basename);
if (!new_name)
return AVERROR(ENOMEM);
ff_format_set_url(vtt_oc, new_name);
}
} else if (c->max_seg_size > 0) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename,
vs->basename, 'd', vs->sequence) < 1) {
av_freep(&filename);
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -strftime 1 with it\n", vs->basename);
return AVERROR(EINVAL);
}
ff_format_set_url(oc, filename);
} else {
if (c->use_localtime) {
int r;
char *expanded = NULL;
r = strftime_expand(vs->basename, &expanded);
if (r < 0) {
av_log(oc, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
return r;
}
ff_format_set_url(oc, expanded);
err = sls_flag_use_localtime_filename(oc, c, vs);
if (err < 0) {
return AVERROR(ENOMEM);
}
if (c->use_localtime_mkdir) {
const char *dir;
char *fn_copy = av_strdup(oc->url);
if (!fn_copy)
return AVERROR(ENOMEM);
dir = av_dirname(fn_copy);
if (ff_mkdir_p(dir) == -1 && errno != EEXIST) {
av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
av_freep(&fn_copy);
return AVERROR(errno);
}
av_freep(&fn_copy);
}
} else {
char *filename = NULL;
if (replace_int_data_in_filename(&filename,
vs->basename, 'd', vs->sequence) < 1) {
av_freep(&filename);
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -strftime 1 with it\n", vs->basename);
return AVERROR(EINVAL);
}
ff_format_set_url(oc, filename);
}
if (vs->vtt_basename) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename,
vs->vtt_basename, 'd', vs->sequence) < 1) {
av_freep(&filename);
av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", vs->vtt_basename);
return AVERROR(EINVAL);
}
ff_format_set_url(vtt_oc, filename);
}
}
proto = avio_find_protocol_name(oc->url);
use_temp_file = proto && !strcmp(proto, "file") && (c->flags & HLS_TEMP_FILE);
if (use_temp_file) {
char *new_name = av_asprintf("%s.tmp", oc->url);
if (!new_name)
return AVERROR(ENOMEM);
ff_format_set_url(oc, new_name);
}
if (c->key_info_file || c->encrypt) {
if (c->segment_type == SEGMENT_TYPE_FMP4) {
av_log(s, AV_LOG_ERROR, "Encrypted fmp4 not yet supported\n");
return AVERROR_PATCHWELCOME;
}
if (c->key_info_file && c->encrypt) {
av_log(s, AV_LOG_WARNING, "Cannot use both -hls_key_info_file and -hls_enc,"
" ignoring -hls_enc\n");
}
if (!vs->encrypt_started || (c->flags & HLS_PERIODIC_REKEY)) {
if (c->key_info_file) {
if ((err = hls_encryption_start(s, vs)) < 0)
goto fail;
} else {
if (!c->encrypt_started) {
if ((err = do_encrypt(s, vs)) < 0)
goto fail;
c->encrypt_started = 1;
}
av_strlcpy(vs->key_uri, c->key_uri, sizeof(vs->key_uri));
av_strlcpy(vs->key_string, c->key_string, sizeof(vs->key_string));
av_strlcpy(vs->iv_string, c->iv_string, sizeof(vs->iv_string));
}
vs->encrypt_started = 1;
}
err = av_strlcpy(iv_string, vs->iv_string, sizeof(iv_string));
if (!err) {
snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, vs->sequence);
memset(vs->iv_string, 0, sizeof(vs->iv_string));
memcpy(vs->iv_string, iv_string, sizeof(iv_string));
}
}
if (c->segment_type != SEGMENT_TYPE_FMP4) {
if (oc->oformat->priv_class && oc->priv_data) {
av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
}
if (c->flags & HLS_SINGLE_FILE) {
if (c->key_info_file || c->encrypt) {
av_dict_set(&options, "encryption_key", vs->key_string, 0);
av_dict_set(&options, "encryption_iv", vs->iv_string, 0);
/* Write temp file with cryption content */
av_freep(&vs->basename_tmp);
vs->basename_tmp = av_asprintf("crypto:%s.tmp", oc->url);
/* append temp file content into single file */
av_freep(&vs->basename);
vs->basename = av_asprintf("%s", oc->url);
} else {
vs->basename_tmp = vs->basename;
}
set_http_options(s, &options, c);
if (!vs->out_single_file)
if ((err = hlsenc_io_open(s, &vs->out_single_file, vs->basename, &options)) < 0) {
if (c->ignore_io_errors)
err = 0;
goto fail;
}
if ((err = hlsenc_io_open(s, &vs->out, vs->basename_tmp, &options)) < 0) {
if (c->ignore_io_errors)
err = 0;
goto fail;
}
}
}
if (vs->vtt_basename) {
set_http_options(s, &options, c);
if ((err = hlsenc_io_open(s, &vtt_oc->pb, vtt_oc->url, &options)) < 0) {
if (c->ignore_io_errors)
err = 0;
goto fail;
}
}
av_dict_free(&options);
if (vs->vtt_basename) {
err = avformat_write_header(vtt_oc,NULL);
if (err < 0)
return err;
}
return 0;
fail:
av_dict_free(&options);
return err;
}
static const char * get_default_pattern_localtime_fmt(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
#if HAVE_LIBC_MSVCRT
// no %s support on MSVC, which invokes the invalid parameter handler
// on unsupported format strings, instead of returning an error
int strftime_s_supported = 0;
#else
char b[21];
time_t t = time(NULL);
struct tm tmbuf, *p = localtime_r(&t, &tmbuf);
// no %s support when strftime returned error or left format string unchanged
int strftime_s_supported = strftime(b, sizeof(b), "%s", p) && strcmp(b, "%s");
#endif
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
return strftime_s_supported ? "-%s.m4s" : "-%Y%m%d%H%M%S.m4s";
}
return strftime_s_supported ? "-%s.ts" : "-%Y%m%d%H%M%S.ts";
}
static int append_postfix(char *name, int name_buf_len, int i)
{
char *p;
char extension[10] = {'\0'};
p = strrchr(name, '.');
if (p) {
av_strlcpy(extension, p, sizeof(extension));
*p = '\0';
}
snprintf(name + strlen(name), name_buf_len - strlen(name), POSTFIX_PATTERN, i);
if (strlen(extension))
av_strlcat(name, extension, name_buf_len);
return 0;
}
static int validate_name(int nb_vs, const char *fn)
{
const char *filename, *subdir_name;
char *fn_dup = NULL;
int ret = 0;
if (!fn)
return AVERROR(EINVAL);
fn_dup = av_strdup(fn);
if (!fn_dup)
return AVERROR(ENOMEM);
filename = av_basename(fn);
subdir_name = av_dirname(fn_dup);
if (nb_vs > 1 && !av_stristr(filename, "%v") && !av_stristr(subdir_name, "%v")) {
av_log(NULL, AV_LOG_ERROR, "More than 1 variant streams are present, %%v is expected "
"either in the filename or in the sub-directory name of file %s\n", fn);
ret = AVERROR(EINVAL);
goto fail;
}
if (av_stristr(filename, "%v") && av_stristr(subdir_name, "%v")) {
av_log(NULL, AV_LOG_ERROR, "%%v is expected either in the filename or "
"in the sub-directory name of file %s, but only in one of them\n", fn);
ret = AVERROR(EINVAL);
goto fail;
}
fail:
av_freep(&fn_dup);
return ret;
}
static int format_name(const char *buf, char **s, int index, const char *varname)
{
const char *proto, *dir;
char *orig_buf_dup = NULL, *mod_buf_dup = NULL;
int ret = 0;
orig_buf_dup = av_strdup(buf);
if (!orig_buf_dup)
return AVERROR(ENOMEM);
if (!av_stristr(buf, "%v")) {
*s = orig_buf_dup;
return 0;
}
if (!varname) {
if (replace_int_data_in_filename(s, orig_buf_dup, 'v', index) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
} else {
if (replace_str_data_in_filename(s, orig_buf_dup, 'v', varname) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
}
proto = avio_find_protocol_name(orig_buf_dup);
dir = av_dirname(orig_buf_dup);
/* if %v is present in the file's directory, create sub-directory */
if (av_stristr(dir, "%v") && proto && !strcmp(proto, "file")) {
mod_buf_dup = av_strdup(*s);
dir = av_dirname(mod_buf_dup);
if (ff_mkdir_p(dir) == -1 && errno != EEXIST) {
ret = AVERROR(errno);
goto fail;
}
}
fail:
av_freep(&orig_buf_dup);
av_freep(&mod_buf_dup);
return ret;
}
static int get_nth_codec_stream_index(AVFormatContext *s,
enum AVMediaType codec_type,
int64_t stream_id)
{
unsigned int stream_index, cnt;
if (stream_id < 0 || stream_id > s->nb_streams - 1)
return -1;
cnt = 0;
for (stream_index = 0; stream_index < s->nb_streams; stream_index++) {
if (s->streams[stream_index]->codecpar->codec_type != codec_type)
continue;
if (cnt == stream_id)
return stream_index;
cnt++;
}
return -1;
}
static int parse_variant_stream_mapstring(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
VariantStream *vs;
int stream_index, i, j;
enum AVMediaType codec_type;
int nb_varstreams = 0, nb_streams;
char *p, *q, *saveptr1, *saveptr2, *varstr, *keyval;
const char *val;
/**
* Expected format for var_stream_map string is as below:
* "a:0,v:0 a:1,v:1"
* "a:0,agroup:a0,default:1,language:ENG a:1,agroup:a1,default:0 v:0,agroup:a0 v:1,agroup:a1"
* This string specifies how to group the audio, video and subtitle streams
* into different variant streams. The variant stream groups are separated
* by space.
*
* a:, v:, s: are keys to specify audio, video and subtitle streams
* respectively. Allowed values are 0 to 9 digits (limited just based on
* practical usage)
*
* agroup: is key to specify audio group. A string can be given as value.
* sgroup: is key to specify subtitle group. A string can be given as value.
*/
p = av_strdup(hls->var_stream_map);
if (!p)
return AVERROR(ENOMEM);
q = p;
while (av_strtok(q, " \t", &saveptr1)) {
q = NULL;
nb_varstreams++;
}
av_freep(&p);
hls->var_streams = av_mallocz(sizeof(*hls->var_streams) * nb_varstreams);
if (!hls->var_streams)
return AVERROR(ENOMEM);
hls->nb_varstreams = nb_varstreams;
p = hls->var_stream_map;
nb_varstreams = 0;
while (varstr = av_strtok(p, " \t", &saveptr1)) {
p = NULL;
if (nb_varstreams < hls->nb_varstreams) {
vs = &(hls->var_streams[nb_varstreams]);
vs->var_stream_idx = nb_varstreams;
vs->is_default = 0;
nb_varstreams++;
} else
return AVERROR(EINVAL);
q = varstr;
while (1) {
if (!av_strncasecmp(q, "a:", 2) || !av_strncasecmp(q, "v:", 2) ||
!av_strncasecmp(q, "s:", 2))
vs->nb_streams++;
q = strchr(q, ',');
if (!q)
break;
q++;
}
vs->streams = av_mallocz(sizeof(AVStream *) * vs->nb_streams);
if (!vs->streams)
return AVERROR(ENOMEM);
nb_streams = 0;
while (keyval = av_strtok(varstr, ",", &saveptr2)) {
int64_t num;
char *end;
varstr = NULL;
if (av_strstart(keyval, "language:", &val)) {
vs->language = val;
continue;
} else if (av_strstart(keyval, "default:", &val)) {
vs->is_default = (!av_strncasecmp(val, "YES", strlen("YES")) ||
(!av_strncasecmp(val, "1", strlen("1"))));
hls->has_default_key = 1;
continue;
} else if (av_strstart(keyval, "name:", &val)) {
vs->varname = val;
continue;
} else if (av_strstart(keyval, "agroup:", &val)) {
vs->agroup = val;
continue;
} else if (av_strstart(keyval, "sgroup:", &val)) {
vs->sgroup = val;
continue;
} else if (av_strstart(keyval, "ccgroup:", &val)) {
vs->ccgroup = val;
continue;
} else if (av_strstart(keyval, "v:", &val)) {
codec_type = AVMEDIA_TYPE_VIDEO;
hls->has_video_m3u8 = 1;
} else if (av_strstart(keyval, "a:", &val)) {
codec_type = AVMEDIA_TYPE_AUDIO;
} else if (av_strstart(keyval, "s:", &val)) {
codec_type = AVMEDIA_TYPE_SUBTITLE;
} else {
av_log(s, AV_LOG_ERROR, "Invalid keyval %s\n", keyval);
return AVERROR(EINVAL);
}
num = strtoll(val, &end, 10);
if (!av_isdigit(*val) || *end != '\0') {
av_log(s, AV_LOG_ERROR, "Invalid stream number: '%s'\n", val);
return AVERROR(EINVAL);
}
stream_index = get_nth_codec_stream_index(s, codec_type, num);
if (stream_index >= 0 && nb_streams < vs->nb_streams) {
for (i = 0; nb_streams > 0 && i < nb_streams; i++) {
if (vs->streams[i] == s->streams[stream_index]) {
av_log(s, AV_LOG_ERROR, "Same elementary stream found more than once inside "
"variant definition #%d\n", nb_varstreams - 1);
return AVERROR(EINVAL);
}
}
for (j = 0; nb_varstreams > 1 && j < nb_varstreams - 1; j++) {
for (i = 0; i < hls->var_streams[j].nb_streams; i++) {
if (hls->var_streams[j].streams[i] == s->streams[stream_index]) {
av_log(s, AV_LOG_ERROR, "Same elementary stream found more than once "
"in two different variant definitions #%d and #%d\n",
j, nb_varstreams - 1);
return AVERROR(EINVAL);
}
}
}
vs->streams[nb_streams++] = s->streams[stream_index];
} else {
av_log(s, AV_LOG_ERROR, "Unable to map stream at %s\n", keyval);
return AVERROR(EINVAL);
}
}
}
av_log(s, AV_LOG_DEBUG, "Number of variant streams %d\n",
hls->nb_varstreams);
return 0;
}
static int parse_cc_stream_mapstring(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int nb_ccstreams = 0;
char *p, *q, *ccstr, *keyval;
char *saveptr1 = NULL, *saveptr2 = NULL;
const char *val;
ClosedCaptionsStream *ccs;
p = av_strdup(hls->cc_stream_map);
if(!p)
return AVERROR(ENOMEM);
q = p;
while (av_strtok(q, " \t", &saveptr1)) {
q = NULL;
nb_ccstreams++;
}
av_freep(&p);
hls->cc_streams = av_mallocz(sizeof(*hls->cc_streams) * nb_ccstreams);
if (!hls->cc_streams)
return AVERROR(ENOMEM);
hls->nb_ccstreams = nb_ccstreams;
p = hls->cc_stream_map;
nb_ccstreams = 0;
while (ccstr = av_strtok(p, " \t", &saveptr1)) {
p = NULL;
if (nb_ccstreams < hls->nb_ccstreams)
ccs = &(hls->cc_streams[nb_ccstreams++]);
else
return AVERROR(EINVAL);
while (keyval = av_strtok(ccstr, ",", &saveptr2)) {
ccstr = NULL;
if (av_strstart(keyval, "ccgroup:", &val)) {
ccs->ccgroup = val;
} else if (av_strstart(keyval, "instreamid:", &val)) {
ccs->instreamid = val;
} else if (av_strstart(keyval, "language:", &val)) {
ccs->language = val;
} else {
av_log(s, AV_LOG_ERROR, "Invalid keyval %s\n", keyval);
return AVERROR(EINVAL);
}
}
if (!ccs->ccgroup || !ccs->instreamid) {
av_log(s, AV_LOG_ERROR, "Insufficient parameters in cc stream map string\n");
return AVERROR(EINVAL);
}
if (av_strstart(ccs->instreamid, "CC", &val)) {
if (atoi(val) < 1 || atoi(val) > 4) {
av_log(s, AV_LOG_ERROR, "Invalid instream ID CC index %d in %s, range 1-4\n",
atoi(val), ccs->instreamid);
return AVERROR(EINVAL);
}
} else if (av_strstart(ccs->instreamid, "SERVICE", &val)) {
if (atoi(val) < 1 || atoi(val) > 63) {
av_log(s, AV_LOG_ERROR, "Invalid instream ID SERVICE index %d in %s, range 1-63 \n",
atoi(val), ccs->instreamid);
return AVERROR(EINVAL);
}
} else {
av_log(s, AV_LOG_ERROR, "Invalid instream ID %s, supported are CCn or SERVICEn\n",
ccs->instreamid);
return AVERROR(EINVAL);
}
}
return 0;
}
static int update_variant_stream_info(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
unsigned int i;
int ret = 0;
if (hls->cc_stream_map) {
ret = parse_cc_stream_mapstring(s);
if (ret < 0)
return ret;
}
if (hls->var_stream_map) {
return parse_variant_stream_mapstring(s);
} else {
//By default, a single variant stream with all the codec streams is created
hls->var_streams = av_mallocz(sizeof(*hls->var_streams));
if (!hls->var_streams)
return AVERROR(ENOMEM);
hls->nb_varstreams = 1;
hls->var_streams[0].var_stream_idx = 0;
hls->var_streams[0].nb_streams = s->nb_streams;
hls->var_streams[0].streams = av_mallocz(sizeof(AVStream *) *
hls->var_streams[0].nb_streams);
if (!hls->var_streams[0].streams)
return AVERROR(ENOMEM);
//by default, the first available ccgroup is mapped to the variant stream
if (hls->nb_ccstreams)
hls->var_streams[0].ccgroup = hls->cc_streams[0].ccgroup;
for (i = 0; i < s->nb_streams; i++)
hls->var_streams[0].streams[i] = s->streams[i];
}
return 0;
}
static int update_master_pl_info(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
const char *dir;
char *fn1= NULL, *fn2 = NULL;
int ret = 0;
fn1 = av_strdup(s->url);
if (!fn1)
return AVERROR(ENOMEM);
dir = av_dirname(fn1);
/**
* if output file's directory has %v, variants are created in sub-directories
* then master is created at the sub-directories level
*/
if (dir && av_stristr(av_basename(dir), "%v")) {
fn2 = av_strdup(dir);
if (!fn2) {
ret = AVERROR(ENOMEM);
goto fail;
}
dir = av_dirname(fn2);
}
if (dir && strcmp(dir, "."))
hls->master_m3u8_url = av_append_path_component(dir, hls->master_pl_name);
else
hls->master_m3u8_url = av_strdup(hls->master_pl_name);
if (!hls->master_m3u8_url) {
ret = AVERROR(ENOMEM);
goto fail;
}
fail:
av_freep(&fn1);
av_freep(&fn2);
return ret;
}
static int hls_write_header(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret, i, j;
VariantStream *vs = NULL;
for (i = 0; i < hls->nb_varstreams; i++) {
int subtitle_streams = 0;
vs = &hls->var_streams[i];
ret = avformat_write_header(vs->avf, NULL);
if (ret < 0)
return ret;
//av_assert0(s->nb_streams == hls->avf->nb_streams);
for (j = 0; j < vs->nb_streams; j++) {
AVStream *inner_st;
AVStream *outer_st = vs->streams[j];
if (hls->max_seg_size > 0) {
if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
(outer_st->codecpar->bit_rate > hls->max_seg_size)) {
av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
"(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
outer_st->codecpar->bit_rate, hls->max_seg_size);
}
}
if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
inner_st = vs->avf->streams[j - subtitle_streams];
else if (vs->vtt_avf) {
inner_st = vs->vtt_avf->streams[0];
subtitle_streams++;
} else {
/* We have a subtitle stream, when the user does not want one */
inner_st = NULL;
continue;
}
avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
if (outer_st->codecpar->codec_id == AV_CODEC_ID_HEVC &&
outer_st->codecpar->codec_tag != MKTAG('h','v','c','1')) {
av_log(s, AV_LOG_WARNING, "Stream HEVC is not hvc1, you should use tag:v hvc1 to set it.\n");
}
write_codec_attr(outer_st, vs);
}
/* Update the Codec Attr string for the mapped audio groups */
if (vs->has_video && vs->agroup) {
for (j = 0; j < hls->nb_varstreams; j++) {
VariantStream *vs_agroup = &(hls->var_streams[j]);
if (!vs_agroup->has_video && !vs_agroup->has_subtitle &&
vs_agroup->agroup &&
!av_strcasecmp(vs_agroup->agroup, vs->agroup)) {
write_codec_attr(vs_agroup->streams[0], vs);
}
}
}
}
return 0;
}
static int hls_init_file_resend(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
AVDictionary *options = NULL;
int ret = 0;
set_http_options(s, &options, hls);
ret = hlsenc_io_open(s, &vs->out, vs->base_output_dirname, &options);
av_dict_free(&options);
if (ret < 0)
return ret;
avio_write(vs->out, vs->init_buffer, vs->init_range_length);
hlsenc_io_close(s, &vs->out, hls->fmp4_init_filename);
return ret;
}
static int64_t append_single_file(AVFormatContext *s, VariantStream *vs)
{
int ret = 0;
int64_t read_byte = 0;
int64_t total_size = 0;
char *filename = NULL;
char buf[BUFSIZE];
AVFormatContext *oc = vs->avf;
hlsenc_io_close(s, &vs->out, vs->basename_tmp);
filename = av_asprintf("%s.tmp", oc->url);
ret = s->io_open(s, &vs->out, filename, AVIO_FLAG_READ, NULL);
if (ret < 0) {
av_free(filename);
return ret;
}
do {
read_byte = avio_read(vs->out, buf, BUFSIZE);
if (read_byte > 0) {
avio_write(vs->out_single_file, buf, read_byte);
total_size += read_byte;
ret = total_size;
}
} while (read_byte > 0);
hlsenc_io_close(s, &vs->out, filename);
av_free(filename);
return ret;
}
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = NULL;
AVStream *st = s->streams[pkt->stream_index];
int64_t end_pts = 0;
int is_ref_pkt = 1;
int ret = 0, can_split = 1, i, j;
int stream_index = 0;
int subtitle_streams = 0;
int range_length = 0;
const char *proto = NULL;
int use_temp_file = 0;
VariantStream *vs = NULL;
char *old_filename = NULL;
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &hls->var_streams[i];
for (j = 0; j < vs->nb_streams; j++) {
if (vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
subtitle_streams++;
}
if (vs->streams[j] == st) {
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
oc = vs->vtt_avf;
stream_index = 0;
} else {
oc = vs->avf;
stream_index = j - subtitle_streams;
}
break;
}
}
if (oc)
break;
}
if (!oc) {
av_log(s, AV_LOG_ERROR, "Unable to find mapping variant stream\n");
return AVERROR(ENOMEM);
}
end_pts = hls->recording_time * vs->number;
if (vs->sequence - vs->nb_entries > hls->start_sequence && hls->init_time > 0) {
/* reset end_pts, hls->recording_time at end of the init hls list */
int64_t init_list_dur = hls->init_time * vs->nb_entries;
int64_t after_init_list_dur = (vs->sequence - hls->start_sequence - vs->nb_entries) * hls->time;
hls->recording_time = hls->time;
end_pts = init_list_dur + after_init_list_dur ;
}
if (vs->start_pts == AV_NOPTS_VALUE) {
vs->start_pts = pkt->pts;
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
vs->start_pts_from_audio = 1;
}
if (vs->start_pts_from_audio && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && vs->start_pts > pkt->pts) {
vs->start_pts = pkt->pts;
vs->start_pts_from_audio = 0;
}
if (vs->has_video) {
can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
is_ref_pkt = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && (pkt->stream_index == vs->reference_stream_index);
}
if (pkt->pts == AV_NOPTS_VALUE)
is_ref_pkt = can_split = 0;
if (is_ref_pkt) {
if (vs->end_pts == AV_NOPTS_VALUE)
vs->end_pts = pkt->pts;
if (vs->new_start) {
vs->new_start = 0;
vs->duration = (double)(pkt->pts - vs->end_pts)
* st->time_base.num / st->time_base.den;
vs->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
} else {
if (pkt->duration) {
vs->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
} else {
av_log(s, AV_LOG_WARNING, "Stream %d packet with pts %" PRId64 " has duration 0. The segment duration may not be precise.\n",
pkt->stream_index, pkt->pts);
vs->duration = (double)(pkt->pts - vs->end_pts) * st->time_base.num / st->time_base.den;
}
}
}
can_split = can_split && (pkt->pts - vs->end_pts > 0);
if (vs->packets_written && can_split && av_compare_ts(pkt->pts - vs->start_pts, st->time_base,
end_pts, AV_TIME_BASE_Q) >= 0) {
int64_t new_start_pos;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
av_write_frame(oc, NULL); /* Flush any buffered data */
new_start_pos = avio_tell(oc->pb);
vs->size = new_start_pos - vs->start_pos;
avio_flush(oc->pb);
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
if (!vs->init_range_length) {
range_length = avio_close_dyn_buf(oc->pb, &vs->init_buffer);
if (range_length <= 0)
return AVERROR(EINVAL);
avio_write(vs->out, vs->init_buffer, range_length);
if (!hls->resend_init_file)
av_freep(&vs->init_buffer);
vs->init_range_length = range_length;
avio_open_dyn_buf(&oc->pb);
vs->packets_written = 0;
vs->start_pos = range_length;
if (!byterange_mode) {
hlsenc_io_close(s, &vs->out, vs->base_output_dirname);
}
}
}
if (!byterange_mode) {
if (vs->vtt_avf) {
hlsenc_io_close(s, &vs->vtt_avf->pb, vs->vtt_avf->url);
}
}
if (hls->flags & HLS_SINGLE_FILE) {
ret = flush_dynbuf(vs, &range_length);
av_freep(&vs->temp_buffer);
if (ret < 0) {
return ret;
}
vs->size = range_length;
if (hls->key_info_file || hls->encrypt)
vs->size = append_single_file(s, vs);
} else {
if (oc->url[0]) {
proto = avio_find_protocol_name(oc->url);
use_temp_file = proto && !strcmp(proto, "file")
&& (hls->flags & HLS_TEMP_FILE);
}
if ((hls->max_seg_size > 0 && (vs->size + vs->start_pos >= hls->max_seg_size)) || !byterange_mode) {
AVDictionary *options = NULL;
char *filename = NULL;
if (hls->key_info_file || hls->encrypt) {
av_dict_set(&options, "encryption_key", vs->key_string, 0);
av_dict_set(&options, "encryption_iv", vs->iv_string, 0);
filename = av_asprintf("crypto:%s", oc->url);
} else {
filename = av_asprintf("%s", oc->url);
}
if (!filename) {
av_dict_free(&options);
return AVERROR(ENOMEM);
}
// look to rename the asset name
if (use_temp_file)
av_dict_set(&options, "mpegts_flags", "resend_headers", 0);
set_http_options(s, &options, hls);
ret = hlsenc_io_open(s, &vs->out, filename, &options);
if (ret < 0) {
av_log(s, hls->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
"Failed to open file '%s'\n", filename);
av_freep(&filename);
av_dict_free(&options);
return hls->ignore_io_errors ? 0 : ret;
}
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
write_styp(vs->out);
}
ret = flush_dynbuf(vs, &range_length);
if (ret < 0) {
av_freep(&filename);
av_dict_free(&options);
return ret;
}
ret = hlsenc_io_close(s, &vs->out, filename);
if (ret < 0) {
av_log(s, AV_LOG_WARNING, "upload segment failed,"
" will retry with a new http session.\n");
ff_format_io_close(s, &vs->out);
ret = hlsenc_io_open(s, &vs->out, filename, &options);
reflush_dynbuf(vs, &range_length);
ret = hlsenc_io_close(s, &vs->out, filename);
}
av_dict_free(&options);
av_freep(&vs->temp_buffer);
av_freep(&filename);
}
if (use_temp_file)
hls_rename_temp_file(s, oc);
}
old_filename = av_strdup(oc->url);
if (!old_filename) {
return AVERROR(ENOMEM);
}
if (vs->start_pos || hls->segment_type != SEGMENT_TYPE_FMP4) {
double cur_duration = (double)(pkt->pts - vs->end_pts) * st->time_base.num / st->time_base.den;
ret = hls_append_segment(s, hls, vs, cur_duration, vs->start_pos, vs->size);
vs->end_pts = pkt->pts;
vs->duration = 0;
if (ret < 0) {
av_freep(&old_filename);
return ret;
}
}
// if we're building a VOD playlist, skip writing the manifest multiple times, and just wait until the end
if (hls->pl_type != PLAYLIST_TYPE_VOD) {
if ((ret = hls_window(s, 0, vs)) < 0) {
av_log(s, AV_LOG_WARNING, "upload playlist failed, will retry with a new http session.\n");
ff_format_io_close(s, &vs->out);
if ((ret = hls_window(s, 0, vs)) < 0) {
av_freep(&old_filename);
return ret;
}
}
}
if (hls->resend_init_file && hls->segment_type == SEGMENT_TYPE_FMP4) {
ret = hls_init_file_resend(s, vs);
if (ret < 0) {
av_freep(&old_filename);
return ret;
}
}
if (hls->flags & HLS_SINGLE_FILE) {
vs->start_pos += vs->size;
if (hls->key_info_file || hls->encrypt)
ret = hls_start(s, vs);
if (hls->segment_type == SEGMENT_TYPE_MPEGTS && oc->oformat->priv_class && oc->priv_data) {
av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
}
} else if (hls->max_seg_size > 0) {
if (vs->size + vs->start_pos >= hls->max_seg_size) {
vs->sequence++;
sls_flag_file_rename(hls, vs, old_filename);
ret = hls_start(s, vs);
vs->start_pos = 0;
/* When split segment by byte, the duration is short than hls_time,
* so it is not enough one segment duration as hls_time, */
} else {
vs->start_pos = new_start_pos;
}
} else {
vs->start_pos = new_start_pos;
sls_flag_file_rename(hls, vs, old_filename);
ret = hls_start(s, vs);
}
vs->number++;
av_freep(&old_filename);
if (ret < 0) {
return ret;
}
}
vs->packets_written++;
if (oc->pb) {
ret = ff_write_chained(oc, stream_index, pkt, s, 0);
vs->video_keyframe_size += pkt->size;
if ((st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && (pkt->flags & AV_PKT_FLAG_KEY)) {
vs->video_keyframe_size = avio_tell(oc->pb);
} else {
vs->video_keyframe_pos = avio_tell(vs->out);
}
if (hls->ignore_io_errors)
ret = 0;
}
return ret;
}
static void hls_deinit(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int i = 0;
VariantStream *vs = NULL;
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &hls->var_streams[i];
av_freep(&vs->basename);
av_freep(&vs->base_output_dirname);
av_freep(&vs->fmp4_init_filename);
av_freep(&vs->vtt_basename);
av_freep(&vs->vtt_m3u8_name);
avformat_free_context(vs->vtt_avf);
avformat_free_context(vs->avf);
if (hls->resend_init_file)
av_freep(&vs->init_buffer);
hls_free_segments(vs->segments);
hls_free_segments(vs->old_segments);
av_freep(&vs->m3u8_name);
av_freep(&vs->streams);
}
ff_format_io_close(s, &hls->m3u8_out);
ff_format_io_close(s, &hls->sub_m3u8_out);
ff_format_io_close(s, &hls->http_delete);
av_freep(&hls->key_basename);
av_freep(&hls->var_streams);
av_freep(&hls->cc_streams);
av_freep(&hls->master_m3u8_url);
}
static int hls_write_trailer(struct AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = NULL;
AVFormatContext *vtt_oc = NULL;
char *old_filename = NULL;
const char *proto = NULL;
int use_temp_file = 0;
int i;
int ret = 0;
VariantStream *vs = NULL;
AVDictionary *options = NULL;
int range_length, byterange_mode;
for (i = 0; i < hls->nb_varstreams; i++) {
char *filename = NULL;
vs = &hls->var_streams[i];
oc = vs->avf;
vtt_oc = vs->vtt_avf;
old_filename = av_strdup(oc->url);
use_temp_file = 0;
if (!old_filename) {
return AVERROR(ENOMEM);
}
if (hls->key_info_file || hls->encrypt) {
av_dict_set(&options, "encryption_key", vs->key_string, 0);
av_dict_set(&options, "encryption_iv", vs->iv_string, 0);
filename = av_asprintf("crypto:%s", oc->url);
} else {
filename = av_asprintf("%s", oc->url);
}
if (!filename) {
av_freep(&old_filename);
return AVERROR(ENOMEM);
}
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
int range_length = 0;
if (!vs->init_range_length) {
uint8_t *buffer = NULL;
av_write_frame(oc, NULL); /* Flush any buffered data */
range_length = avio_close_dyn_buf(oc->pb, &buffer);
avio_write(vs->out, buffer, range_length);
av_freep(&buffer);
vs->init_range_length = range_length;
avio_open_dyn_buf(&oc->pb);
vs->packets_written = 0;
vs->start_pos = range_length;
byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
if (!byterange_mode) {
ff_format_io_close(s, &vs->out);
hlsenc_io_close(s, &vs->out, vs->base_output_dirname);
}
}
}
if (!(hls->flags & HLS_SINGLE_FILE)) {
set_http_options(s, &options, hls);
ret = hlsenc_io_open(s, &vs->out, filename, &options);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open file '%s'\n", oc->url);
goto failed;
}
if (hls->segment_type == SEGMENT_TYPE_FMP4)
write_styp(vs->out);
}
ret = flush_dynbuf(vs, &range_length);
if (ret < 0)
goto failed;
vs->size = range_length;
ret = hlsenc_io_close(s, &vs->out, filename);
if (ret < 0) {
av_log(s, AV_LOG_WARNING, "upload segment failed, will retry with a new http session.\n");
ff_format_io_close(s, &vs->out);
ret = hlsenc_io_open(s, &vs->out, filename, &options);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open file '%s'\n", oc->url);
goto failed;
}
reflush_dynbuf(vs, &range_length);
ret = hlsenc_io_close(s, &vs->out, filename);
if (ret < 0)
av_log(s, AV_LOG_WARNING, "Failed to upload file '%s' at the end.\n", oc->url);
}
if (hls->flags & HLS_SINGLE_FILE) {
if (hls->key_info_file || hls->encrypt) {
vs->size = append_single_file(s, vs);
}
hlsenc_io_close(s, &vs->out_single_file, vs->basename);
}
failed:
av_freep(&vs->temp_buffer);
av_dict_free(&options);
av_freep(&filename);
av_write_trailer(oc);
if (oc->url[0]) {
proto = avio_find_protocol_name(oc->url);
use_temp_file = proto && !strcmp(proto, "file") && (hls->flags & HLS_TEMP_FILE);
}
// rename that segment from .tmp to the real one
if (use_temp_file && !(hls->flags & HLS_SINGLE_FILE)) {
hls_rename_temp_file(s, oc);
av_freep(&old_filename);
old_filename = av_strdup(oc->url);
if (!old_filename) {
return AVERROR(ENOMEM);
}
}
/* after av_write_trailer, then duration + 1 duration per packet */
hls_append_segment(s, hls, vs, vs->duration + vs->dpp, vs->start_pos, vs->size);
sls_flag_file_rename(hls, vs, old_filename);
if (vtt_oc) {
if (vtt_oc->pb)
av_write_trailer(vtt_oc);
vs->size = avio_tell(vs->vtt_avf->pb) - vs->start_pos;
ff_format_io_close(s, &vtt_oc->pb);
}
ret = hls_window(s, 1, vs);
if (ret < 0) {
av_log(s, AV_LOG_WARNING, "upload playlist failed, will retry with a new http session.\n");
ff_format_io_close(s, &vs->out);
hls_window(s, 1, vs);
}
ffio_free_dyn_buf(&oc->pb);
av_free(old_filename);
}
return 0;
}
static int hls_init(AVFormatContext *s)
{
int ret = 0;
int i = 0;
int j = 0;
HLSContext *hls = s->priv_data;
const char *pattern;
VariantStream *vs = NULL;
const char *vtt_pattern = hls->flags & HLS_SINGLE_FILE ? ".vtt" : "%d.vtt";
char *p = NULL;
int http_base_proto = ff_is_http_proto(s->url);
int fmp4_init_filename_len = strlen(hls->fmp4_init_filename) + 1;
double initial_program_date_time = av_gettime() / 1000000.0;
if (hls->use_localtime) {
pattern = get_default_pattern_localtime_fmt(s);
} else {
pattern = hls->segment_type == SEGMENT_TYPE_FMP4 ? "%d.m4s" : "%d.ts";
if (hls->flags & HLS_SINGLE_FILE)
pattern += 2;
}
hls->has_default_key = 0;
hls->has_video_m3u8 = 0;
ret = update_variant_stream_info(s);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Variant stream info update failed with status %x\n",
ret);
return ret;
}
if (!hls->method && http_base_proto) {
av_log(hls, AV_LOG_WARNING, "No HTTP method set, hls muxer defaulting to method PUT.\n");
}
ret = validate_name(hls->nb_varstreams, s->url);
if (ret < 0)
return ret;
if (hls->segment_filename) {
ret = validate_name(hls->nb_varstreams, hls->segment_filename);
if (ret < 0)
return ret;
}
if (av_strcasecmp(hls->fmp4_init_filename, "init.mp4")) {
ret = validate_name(hls->nb_varstreams, hls->fmp4_init_filename);
if (ret < 0)
return ret;
}
if (hls->subtitle_filename) {
ret = validate_name(hls->nb_varstreams, hls->subtitle_filename);
if (ret < 0)
return ret;
}
if (hls->master_pl_name) {
ret = update_master_pl_info(s);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Master stream info update failed with status %x\n",
ret);
return ret;
}
}
if ((hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) ||
(hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH) ||
(hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME)) {
time_t t = time(NULL);
if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH) {
hls->start_sequence = av_gettime();
} else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
hls->start_sequence = (int64_t)t;
} else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
char b[15];
struct tm *p, tmbuf;
if (!(p = localtime_r(&t, &tmbuf)))
return AVERROR(errno);
if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
return AVERROR(ENOMEM);
hls->start_sequence = strtoll(b, NULL, 10);
}
av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
}
hls->recording_time = hls->init_time && hls->max_nb_segments > 0 ? hls->init_time : hls->time;
if (hls->flags & HLS_SPLIT_BY_TIME && hls->flags & HLS_INDEPENDENT_SEGMENTS) {
// Independent segments cannot be guaranteed when splitting by time
hls->flags &= ~HLS_INDEPENDENT_SEGMENTS;
av_log(s, AV_LOG_WARNING,
"'split_by_time' and 'independent_segments' cannot be "
"enabled together. Disabling 'independent_segments' flag\n");
}
for (i = 0; i < hls->nb_varstreams; i++) {
vs = &hls->var_streams[i];
ret = format_name(s->url, &vs->m3u8_name, i, vs->varname);
if (ret < 0)
return ret;
vs->sequence = hls->start_sequence;
vs->start_pts = AV_NOPTS_VALUE;
vs->end_pts = AV_NOPTS_VALUE;
vs->current_segment_final_filename_fmt[0] = '\0';
vs->initial_prog_date_time = initial_program_date_time;
for (j = 0; j < vs->nb_streams; j++) {
vs->has_video += vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
/* Get one video stream to reference for split segments
* so use the first video stream index. */
if ((vs->has_video == 1) && (vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)) {
vs->reference_stream_index = vs->streams[j]->index;
}
vs->has_subtitle += vs->streams[j]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
}
if (vs->has_video > 1)
av_log(s, AV_LOG_WARNING, "More than a single video stream present, expect issues decoding it.\n");
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
vs->oformat = av_guess_format("mp4", NULL, NULL);
} else {
vs->oformat = av_guess_format("mpegts", NULL, NULL);
}
if (!vs->oformat)
return AVERROR_MUXER_NOT_FOUND;
if (hls->segment_filename) {
ret = format_name(hls->segment_filename, &vs->basename, i, vs->varname);
if (ret < 0)
return ret;
} else {
p = strrchr(vs->m3u8_name, '.');
if (p)
*p = '\0';
vs->basename = av_asprintf("%s%s", vs->m3u8_name, pattern);
if (!vs->basename)
return AVERROR(ENOMEM);
if (p)
*p = '.';
}
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
if (hls->nb_varstreams > 1)
fmp4_init_filename_len += strlen(POSTFIX_PATTERN);
if (hls->flags & HLS_SINGLE_FILE) {
vs->fmp4_init_filename = av_strdup(vs->basename);
if (!vs->fmp4_init_filename)
return AVERROR(ENOMEM);
} else {
vs->fmp4_init_filename = av_malloc(fmp4_init_filename_len);
if (!vs->fmp4_init_filename)
return AVERROR(ENOMEM);
av_strlcpy(vs->fmp4_init_filename, hls->fmp4_init_filename,
fmp4_init_filename_len);
if (hls->nb_varstreams > 1) {
if (av_stristr(vs->fmp4_init_filename, "%v")) {
av_freep(&vs->fmp4_init_filename);
ret = format_name(hls->fmp4_init_filename,
&vs->fmp4_init_filename, i, vs->varname);
} else {
ret = append_postfix(vs->fmp4_init_filename, fmp4_init_filename_len, i);
}
if (ret < 0)
return ret;
}
if (hls->use_localtime) {
int r;
char *expanded = NULL;
r = strftime_expand(vs->fmp4_init_filename, &expanded);
if (r < 0) {
av_log(s, AV_LOG_ERROR, "Could not get segment filename with strftime\n");
return r;
}
av_free(vs->fmp4_init_filename);
vs->fmp4_init_filename = expanded;
}
p = strrchr(vs->m3u8_name, '/');
if (p) {
char tmp = *(++p);
*p = '\0';
vs->base_output_dirname = av_asprintf("%s%s", vs->m3u8_name,
vs->fmp4_init_filename);
*p = tmp;
} else {
vs->base_output_dirname = av_strdup(vs->fmp4_init_filename);
}
if (!vs->base_output_dirname)
return AVERROR(ENOMEM);
}
}
ret = hls->use_localtime ? sls_flag_check_duration_size(hls, vs) : sls_flag_check_duration_size_index(hls);
if (ret < 0)
return ret;
if (vs->has_subtitle) {
vs->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
if (!vs->vtt_oformat)
return AVERROR_MUXER_NOT_FOUND;
p = strrchr(vs->m3u8_name, '.');
if (p)
*p = '\0';
vs->vtt_basename = av_asprintf("%s%s", vs->m3u8_name, vtt_pattern);
if (!vs->vtt_basename)
return AVERROR(ENOMEM);
if (hls->subtitle_filename) {
ret = format_name(hls->subtitle_filename, &vs->vtt_m3u8_name, i, vs->varname);
if (ret < 0)
return ret;
} else {
vs->vtt_m3u8_name = av_asprintf("%s_vtt.m3u8", vs->m3u8_name);
if (!vs->vtt_m3u8_name)
return AVERROR(ENOMEM);
}
if (p)
*p = '.';
}
if ((ret = hls_mux_init(s, vs)) < 0)
return ret;
if (hls->flags & HLS_APPEND_LIST) {
parse_playlist(s, vs->m3u8_name, vs);
vs->discontinuity = 1;
if (hls->init_time > 0) {
av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
" hls_init_time value will have no effect\n");
hls->init_time = 0;
hls->recording_time = hls->time;
}
}
if ((ret = hls_start(s, vs)) < 0)
return ret;
vs->number++;
}
return ret;
}
#define OFFSET(x) offsetof(HLSContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
{"hls_time", "set segment length", OFFSET(time), AV_OPT_TYPE_DURATION, {.i64 = 2000000}, 0, INT64_MAX, E},
{"hls_init_time", "set segment length at init list", OFFSET(init_time), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, E},
{"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
{"hls_delete_threshold", "set number of unreferenced segments to keep before deleting", OFFSET(hls_delete_threshold), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, E},
{"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
{"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_options","set segments files format options of hls", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E},
{"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
{"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_enc", "enable AES128 encryption support", OFFSET(encrypt), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
{"hls_enc_key", "hex-coded 16 byte key to encrypt the segments", OFFSET(key), AV_OPT_TYPE_STRING, .flags = E},
{"hls_enc_key_url", "url to access the key to decrypt the segments", OFFSET(key_url), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_enc_iv", "hex-coded 16 byte initialization vector", OFFSET(iv), AV_OPT_TYPE_STRING, .flags = E},
{"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_type", "set hls segment files type", OFFSET(segment_type), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_MPEGTS }, 0, SEGMENT_TYPE_FMP4, E, .unit = "segment_type"},
{"mpegts", "make segment file to mpegts files in m3u8", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MPEGTS }, 0, UINT_MAX, E, .unit = "segment_type"},
{"fmp4", "make segment file to fragment mp4 files in m3u8", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_FMP4 }, 0, UINT_MAX, E, .unit = "segment_type"},
{"hls_fmp4_init_filename", "set fragment mp4 file init filename", OFFSET(fmp4_init_filename), AV_OPT_TYPE_STRING, {.str = "init.mp4"}, 0, 0, E},
{"hls_fmp4_init_resend", "resend fragment mp4 init file after refresh m3u8 every time", OFFSET(resend_init_file), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, .unit = "flags"},
{"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, .unit = "flags"},
{"temp_file", "write segment and playlist to temporary file and rename when complete", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_TEMP_FILE }, 0, UINT_MAX, E, .unit = "flags"},
{"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, .unit = "flags"},
{"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, .unit = "flags"},
{"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, .unit = "flags"},
{"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, .unit = "flags"},
{"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, .unit = "flags"},
{"append_list", "append the new segments into old hls segment list", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_APPEND_LIST }, 0, UINT_MAX, E, .unit = "flags"},
{"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, .unit = "flags"},
{"second_level_segment_index", "include segment index in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_INDEX }, 0, UINT_MAX, E, .unit = "flags"},
{"second_level_segment_duration", "include segment duration in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_DURATION }, 0, UINT_MAX, E, .unit = "flags"},
{"second_level_segment_size", "include segment size in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_SIZE }, 0, UINT_MAX, E, .unit = "flags"},
{"periodic_rekey", "reload keyinfo file periodically for re-keying", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PERIODIC_REKEY }, 0, UINT_MAX, E, .unit = "flags"},
{"independent_segments", "add EXT-X-INDEPENDENT-SEGMENTS, whenever applicable", 0, AV_OPT_TYPE_CONST, { .i64 = HLS_INDEPENDENT_SEGMENTS }, 0, UINT_MAX, E, .unit = "flags"},
{"iframes_only", "add EXT-X-I-FRAMES-ONLY, whenever applicable", 0, AV_OPT_TYPE_CONST, { .i64 = HLS_I_FRAMES_ONLY }, 0, UINT_MAX, E, .unit = "flags"},
{"strftime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"strftime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, .unit = "pl_type" },
{"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, .unit = "pl_type" },
{"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, .unit = "pl_type" },
{"method", "set the HTTP method(default: PUT)", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_start_number_source", "set source of first number in sequence", OFFSET(start_sequence_source_type), AV_OPT_TYPE_INT, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, 0, HLS_START_SEQUENCE_LAST-1, E, .unit = "start_sequence_source_type" },
{"generic", "start_number value (default)", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, INT_MIN, INT_MAX, E, .unit = "start_sequence_source_type" },
{"epoch", "seconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, .unit = "start_sequence_source_type" },
{"epoch_us", "microseconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, .unit = "start_sequence_source_type" },
{"datetime", "current datetime as YYYYMMDDhhmmss", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_FORMATTED_DATETIME }, INT_MIN, INT_MAX, E, .unit = "start_sequence_source_type" },
{"http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"var_stream_map", "Variant stream map string", OFFSET(var_stream_map), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"cc_stream_map", "Closed captions stream map string", OFFSET(cc_stream_map), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"master_pl_name", "Create HLS master playlist with this name", OFFSET(master_pl_name), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"master_pl_publish_rate", "Publish master play list every after this many segment intervals", OFFSET(master_publish_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, E},
{"http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
{"ignore_io_errors", "Ignore IO errors for stable long-duration runs with network output", OFFSET(ignore_io_errors), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{"headers", "set custom HTTP headers, can override built in default headers", OFFSET(headers), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ NULL },
};
static const AVClass hls_class = {
.class_name = "hls muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFOutputFormat ff_hls_muxer = {
.p.name = "hls",
.p.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
.p.extensions = "m3u8",
.p.audio_codec = AV_CODEC_ID_AAC,
.p.video_codec = AV_CODEC_ID_H264,
.p.subtitle_codec = AV_CODEC_ID_WEBVTT,
#if FF_API_ALLOW_FLUSH
.p.flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH | AVFMT_NODIMENSIONS,
#else
.p.flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER | AVFMT_NODIMENSIONS,
#endif
.p.priv_class = &hls_class,
.flags_internal = FF_FMT_ALLOW_FLUSH,
.priv_data_size = sizeof(HLSContext),
.init = hls_init,
.write_header = hls_write_header,
.write_packet = hls_write_packet,
.write_trailer = hls_write_trailer,
.deinit = hls_deinit,
};
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