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mpv/common/encode_lavc.c
wm4 6169fba796 encode: fix occasional init crash due to initialization order issues 
Looks like the recent change to this actually made it crash whenever
audio happened to be initialized first, due to not setting the
mux_stream field before the on_ready callback. Mess a way around this.

Also remove a stray unused variable from ao_lavc.c.
2020-03-22 21:08:44 +01:00

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/*
* muxing using libavformat
*
* Copyright (C) 2010 Nicolas George <george@nsup.org>
* Copyright (C) 2011-2012 Rudolf Polzer <divVerent@xonotic.org>
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libavutil/avutil.h>
#include <libavutil/timestamp.h>
#include "config.h"
#include "encode_lavc.h"
#include "common/av_common.h"
#include "common/global.h"
#include "common/msg.h"
#include "common/msg_control.h"
#include "options/m_config.h"
#include "options/m_option.h"
#include "options/options.h"
#include "osdep/timer.h"
#include "video/out/vo.h"
#include "mpv_talloc.h"
#include "stream/stream.h"
struct encode_priv {
struct mp_log *log;
// --- All fields are protected by encode_lavc_context.lock
bool failed;
struct mp_tags *metadata;
AVFormatContext *muxer;
bool header_written; // muxer was initialized
struct mux_stream **streams;
int num_streams;
// Statistics
double t0;
long long abytes;
long long vbytes;
unsigned int frames;
double audioseconds;
};
struct mux_stream {
int index; // index of this into p->streams[]
char name[80];
struct encode_lavc_context *ctx;
enum AVMediaType codec_type;
AVRational encoder_timebase; // packet timestamps from encoder
AVStream *st;
void (*on_ready)(void *ctx); // when finishing muxer init
void *on_ready_ctx;
};
#define OPT_BASE_STRUCT struct encode_opts
const struct m_sub_options encode_config = {
.opts = (const m_option_t[]) {
{"o", OPT_STRING(file), .flags = CONF_NOCFG | CONF_PRE_PARSE | M_OPT_FILE,
.deprecation_message = "lack of maintainer"},
{"of", OPT_STRING(format)},
{"ofopts", OPT_KEYVALUELIST(fopts), .flags = M_OPT_HAVE_HELP},
{"ovc", OPT_STRING(vcodec)},
{"ovcopts", OPT_KEYVALUELIST(vopts), .flags = M_OPT_HAVE_HELP},
{"oac", OPT_STRING(acodec)},
{"oacopts", OPT_KEYVALUELIST(aopts), .flags = M_OPT_HAVE_HELP},
{"ovoffset", OPT_FLOAT(voffset), M_RANGE(-1000000.0, 1000000.0),
.deprecation_message = "--audio-delay (once unbroken)"},
{"oaoffset", OPT_FLOAT(aoffset), M_RANGE(-1000000.0, 1000000.0),
.deprecation_message = "--audio-delay (once unbroken)"},
{"orawts", OPT_FLAG(rawts)},
{"ovfirst", OPT_FLAG(video_first),
.deprecation_message = "no replacement"},
{"oafirst", OPT_FLAG(audio_first),
.deprecation_message = "no replacement"},
{"ocopy-metadata", OPT_FLAG(copy_metadata)},
{"oset-metadata", OPT_KEYVALUELIST(set_metadata)},
{"oremove-metadata", OPT_STRINGLIST(remove_metadata)},
{"ocopyts", OPT_REMOVED("ocopyts is now the default")},
{"oneverdrop", OPT_REMOVED("no replacement")},
{"oharddup", OPT_REMOVED("use --vf-add=fps=VALUE")},
{"ofps", OPT_REMOVED("no replacement (use --vf-add=fps=VALUE for CFR)")},
{"oautofps", OPT_REMOVED("no replacement")},
{"omaxfps", OPT_REMOVED("no replacement")},
{0}
},
.size = sizeof(struct encode_opts),
.defaults = &(const struct encode_opts){
.copy_metadata = 1,
},
};
struct encode_lavc_context *encode_lavc_init(struct mpv_global *global)
{
struct encode_lavc_context *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (struct encode_lavc_context){
.global = global,
.options = mp_get_config_group(ctx, global, &encode_config),
.priv = talloc_zero(ctx, struct encode_priv),
.log = mp_log_new(ctx, global->log, "encode"),
};
pthread_mutex_init(&ctx->lock, NULL);
struct encode_priv *p = ctx->priv;
p->log = ctx->log;
const char *filename = ctx->options->file;
// STUPID STUPID STUPID STUPID avio
// does not support "-" as file name to mean stdin/stdout
// ffmpeg.c works around this too, the same way
if (!strcmp(filename, "-"))
filename = "pipe:1";
if (filename && (
!strcmp(filename, "/dev/stdout") ||
!strcmp(filename, "pipe:") ||
!strcmp(filename, "pipe:1")))
mp_msg_force_stderr(global, true);
encode_lavc_discontinuity(ctx);
p->muxer = avformat_alloc_context();
MP_HANDLE_OOM(p->muxer);
if (ctx->options->format && ctx->options->format[0]) {
ctx->oformat = av_guess_format(ctx->options->format, filename, NULL);
} else {
ctx->oformat = av_guess_format(NULL, filename, NULL);
}
if (!ctx->oformat) {
MP_FATAL(ctx, "format not found\n");
goto fail;
}
p->muxer->oformat = ctx->oformat;
p->muxer->url = av_strdup(filename);
MP_HANDLE_OOM(p->muxer->url);
return ctx;
fail:
p->failed = true;
encode_lavc_free(ctx);
return NULL;
}
void encode_lavc_set_metadata(struct encode_lavc_context *ctx,
struct mp_tags *metadata)
{
struct encode_priv *p = ctx->priv;
pthread_mutex_lock(&ctx->lock);
if (ctx->options->copy_metadata) {
p->metadata = mp_tags_dup(ctx, metadata);
} else {
p->metadata = talloc_zero(ctx, struct mp_tags);
}
if (ctx->options->set_metadata) {
char **kv = ctx->options->set_metadata;
// Set all user-provided metadata tags
for (int n = 0; kv[n * 2]; n++) {
MP_VERBOSE(ctx, "setting metadata value '%s' for key '%s'\n",
kv[n*2 + 0], kv[n*2 +1]);
mp_tags_set_str(p->metadata, kv[n*2 + 0], kv[n*2 +1]);
}
}
if (ctx->options->remove_metadata) {
char **k = ctx->options->remove_metadata;
// Remove all user-provided metadata tags
for (int n = 0; k[n]; n++) {
MP_VERBOSE(ctx, "removing metadata key '%s'\n", k[n]);
mp_tags_remove_str(p->metadata, k[n]);
}
}
pthread_mutex_unlock(&ctx->lock);
}
bool encode_lavc_free(struct encode_lavc_context *ctx)
{
bool res = true;
if (!ctx)
return res;
struct encode_priv *p = ctx->priv;
if (!p->failed && !p->header_written) {
MP_FATAL(p, "no data written to target file\n");
p->failed = true;
}
if (!p->failed && p->header_written) {
if (av_write_trailer(p->muxer) < 0)
MP_ERR(p, "error writing trailer\n");
MP_INFO(p, "video: encoded %lld bytes\n", p->vbytes);
MP_INFO(p, "audio: encoded %lld bytes\n", p->abytes);
MP_INFO(p, "muxing overhead %lld bytes\n",
(long long)(avio_size(p->muxer->pb) - p->vbytes - p->abytes));
}
if (avio_closep(&p->muxer->pb) < 0 && !p->failed) {
MP_ERR(p, "Closing file failed\n");
p->failed = true;
}
avformat_free_context(p->muxer);
res = !p->failed;
pthread_mutex_destroy(&ctx->lock);
talloc_free(ctx);
return res;
}
void encode_lavc_set_audio_pts(struct encode_lavc_context *ctx, double pts)
{
if (ctx) {
pthread_mutex_lock(&ctx->lock);
ctx->last_audio_in_pts = pts;
ctx->samples_since_last_pts = 0;
pthread_mutex_unlock(&ctx->lock);
}
}
// called locked
static void maybe_init_muxer(struct encode_lavc_context *ctx)
{
struct encode_priv *p = ctx->priv;
if (p->header_written || p->failed)
return;
// Check if all streams were initialized yet. We need data to know the
// AVStream parameters, so we wait for data from _all_ streams before
// starting.
for (int n = 0; n < p->num_streams; n++) {
if (!p->streams[n]->st)
return;
}
if (!(p->muxer->oformat->flags & AVFMT_NOFILE)) {
MP_INFO(p, "Opening output file: %s\n", p->muxer->url);
if (avio_open(&p->muxer->pb, p->muxer->url, AVIO_FLAG_WRITE) < 0) {
MP_FATAL(p, "could not open '%s'\n", p->muxer->url);
goto failed;
}
}
p->t0 = mp_time_sec();
MP_INFO(p, "Opening muxer: %s [%s]\n",
p->muxer->oformat->long_name, p->muxer->oformat->name);
if (p->metadata) {
for (int i = 0; i < p->metadata->num_keys; i++) {
av_dict_set(&p->muxer->metadata,
p->metadata->keys[i], p->metadata->values[i], 0);
}
}
AVDictionary *opts = NULL;
mp_set_avdict(&opts, ctx->options->fopts);
if (avformat_write_header(p->muxer, &opts) < 0) {
MP_FATAL(p, "Failed to initialize muxer.\n");
p->failed = true;
} else {
mp_avdict_print_unset(p->log, MSGL_WARN, opts);
}
av_dict_free(&opts);
if (p->failed)
goto failed;
p->header_written = true;
for (int n = 0; n < p->num_streams; n++) {
struct mux_stream *s = p->streams[n];
if (s->on_ready)
s->on_ready(s->on_ready_ctx);
}
return;
failed:
p->failed = true;
}
// called locked
static struct mux_stream *find_mux_stream(struct encode_lavc_context *ctx,
enum AVMediaType codec_type)
{
struct encode_priv *p = ctx->priv;
for (int n = 0; n < p->num_streams; n++) {
struct mux_stream *s = p->streams[n];
if (s->codec_type == codec_type)
return s;
}
return NULL;
}
void encode_lavc_expect_stream(struct encode_lavc_context *ctx,
enum stream_type type)
{
struct encode_priv *p = ctx->priv;
pthread_mutex_lock(&ctx->lock);
enum AVMediaType codec_type = mp_to_av_stream_type(type);
// These calls are idempotent.
if (find_mux_stream(ctx, codec_type))
goto done;
if (p->header_written) {
MP_ERR(p, "Cannot add a stream during encoding.\n");
p->failed = true;
goto done;
}
struct mux_stream *dst = talloc_ptrtype(p, dst);
*dst = (struct mux_stream){
.index = p->num_streams,
.ctx = ctx,
.codec_type = mp_to_av_stream_type(type),
};
snprintf(dst->name, sizeof(dst->name), "%s", stream_type_name(type));
MP_TARRAY_APPEND(p, p->streams, p->num_streams, dst);
done:
pthread_mutex_unlock(&ctx->lock);
}
void encode_lavc_stream_eof(struct encode_lavc_context *ctx,
enum stream_type type)
{
if (!ctx)
return;
struct encode_priv *p = ctx->priv;
pthread_mutex_lock(&ctx->lock);
enum AVMediaType codec_type = mp_to_av_stream_type(type);
struct mux_stream *dst = find_mux_stream(ctx, codec_type);
// If we've reached EOF, even though the stream was selected, and we didn't
// ever initialize it, we have a problem. We could mux some sort of dummy
// stream (and could fail if actual data arrives later), or we bail out
// early.
if (dst && !dst->st) {
MP_ERR(p, "No data on stream %s.\n", dst->name);
p->failed = true;
}
pthread_mutex_unlock(&ctx->lock);
}
// Signal that you are ready to encode (you provide the codec params etc. too).
// This returns a muxing handle which you can use to add encodec packets.
// Can be called only once per stream. info is copied by callee as needed.
static void encode_lavc_add_stream(struct encoder_context *enc,
struct encode_lavc_context *ctx,
struct encoder_stream_info *info,
void (*on_ready)(void *ctx),
void *on_ready_ctx)
{
struct encode_priv *p = ctx->priv;
pthread_mutex_lock(&ctx->lock);
struct mux_stream *dst = find_mux_stream(ctx, info->codecpar->codec_type);
if (!dst) {
MP_ERR(p, "Cannot add a stream at runtime.\n");
p->failed = true;
goto done;
}
if (dst->st) {
// Possibly via --gapless-audio, or explicitly recreating AO/VO.
MP_ERR(p, "Encoder was reinitialized; this is not allowed.\n");
p->failed = true;
dst = NULL;
goto done;
}
dst->st = avformat_new_stream(p->muxer, NULL);
MP_HANDLE_OOM(dst->st);
dst->encoder_timebase = info->timebase;
dst->st->time_base = info->timebase; // lavf will change this on muxer init
// Some muxers (e.g. Matroska one) expect the sample_aspect_ratio to be
// set on the AVStream.
if (info->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
dst->st->sample_aspect_ratio = info->codecpar->sample_aspect_ratio;
if (avcodec_parameters_copy(dst->st->codecpar, info->codecpar) < 0)
MP_HANDLE_OOM(0);
dst->on_ready = on_ready;
dst->on_ready_ctx = on_ready_ctx;
enc->mux_stream = dst;
maybe_init_muxer(ctx);
done:
pthread_mutex_unlock(&ctx->lock);
}
// Write a packet. This will take over ownership of `pkt`
static void encode_lavc_add_packet(struct mux_stream *dst, AVPacket *pkt)
{
struct encode_lavc_context *ctx = dst->ctx;
struct encode_priv *p = ctx->priv;
assert(dst->st);
pthread_mutex_lock(&ctx->lock);
if (p->failed)
goto done;
if (!p->header_written) {
MP_ERR(p, "Encoder trying to write packet before muxer was initialized.\n");
p->failed = true;
goto done;
}
pkt->stream_index = dst->st->index;
assert(dst->st == p->muxer->streams[pkt->stream_index]);
av_packet_rescale_ts(pkt, dst->encoder_timebase, dst->st->time_base);
switch (dst->st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
p->vbytes += pkt->size;
p->frames += 1;
break;
case AVMEDIA_TYPE_AUDIO:
p->abytes += pkt->size;
p->audioseconds += pkt->duration
* (double)dst->st->time_base.num
/ (double)dst->st->time_base.den;
break;
}
if (av_interleaved_write_frame(p->muxer, pkt) < 0) {
MP_ERR(p, "Writing packet failed.\n");
p->failed = true;
}
pkt = NULL;
done:
pthread_mutex_unlock(&ctx->lock);
if (pkt)
av_packet_unref(pkt);
}
AVRational encoder_get_mux_timebase_unlocked(struct encoder_context *p)
{
return p->mux_stream->st->time_base;
}
void encode_lavc_discontinuity(struct encode_lavc_context *ctx)
{
if (!ctx)
return;
pthread_mutex_lock(&ctx->lock);
ctx->audio_pts_offset = MP_NOPTS_VALUE;
ctx->discontinuity_pts_offset = MP_NOPTS_VALUE;
pthread_mutex_unlock(&ctx->lock);
}
static void encode_lavc_printoptions(struct mp_log *log, const void *obj,
const char *indent, const char *subindent,
const char *unit, int filter_and,
int filter_eq)
{
const AVOption *opt = NULL;
char optbuf[32];
while ((opt = av_opt_next(obj, opt))) {
// if flags are 0, it simply hasn't been filled in yet and may be
// potentially useful
if (opt->flags)
if ((opt->flags & filter_and) != filter_eq)
continue;
/* Don't print CONST's on level one.
* Don't print anything but CONST's on level two.
* Only print items from the requested unit.
*/
if (!unit && opt->type == AV_OPT_TYPE_CONST) {
continue;
} else if (unit && opt->type != AV_OPT_TYPE_CONST) {
continue;
} else if (unit && opt->type == AV_OPT_TYPE_CONST
&& strcmp(unit, opt->unit))
{
continue;
} else if (unit && opt->type == AV_OPT_TYPE_CONST) {
mp_info(log, "%s", subindent);
} else {
mp_info(log, "%s", indent);
}
switch (opt->type) {
case AV_OPT_TYPE_FLAGS:
snprintf(optbuf, sizeof(optbuf), "%s=<flags>", opt->name);
break;
case AV_OPT_TYPE_INT:
snprintf(optbuf, sizeof(optbuf), "%s=<int>", opt->name);
break;
case AV_OPT_TYPE_INT64:
snprintf(optbuf, sizeof(optbuf), "%s=<int64>", opt->name);
break;
case AV_OPT_TYPE_DOUBLE:
snprintf(optbuf, sizeof(optbuf), "%s=<double>", opt->name);
break;
case AV_OPT_TYPE_FLOAT:
snprintf(optbuf, sizeof(optbuf), "%s=<float>", opt->name);
break;
case AV_OPT_TYPE_STRING:
snprintf(optbuf, sizeof(optbuf), "%s=<string>", opt->name);
break;
case AV_OPT_TYPE_RATIONAL:
snprintf(optbuf, sizeof(optbuf), "%s=<rational>", opt->name);
break;
case AV_OPT_TYPE_BINARY:
snprintf(optbuf, sizeof(optbuf), "%s=<binary>", opt->name);
break;
case AV_OPT_TYPE_CONST:
snprintf(optbuf, sizeof(optbuf), " [+-]%s", opt->name);
break;
default:
snprintf(optbuf, sizeof(optbuf), "%s", opt->name);
break;
}
optbuf[sizeof(optbuf) - 1] = 0;
mp_info(log, "%-32s ", optbuf);
if (opt->help)
mp_info(log, " %s", opt->help);
mp_info(log, "\n");
if (opt->unit && opt->type != AV_OPT_TYPE_CONST)
encode_lavc_printoptions(log, obj, indent, subindent, opt->unit,
filter_and, filter_eq);
}
}
bool encode_lavc_showhelp(struct mp_log *log, struct encode_opts *opts)
{
bool help_output = false;
#define CHECKS(str) ((str) && \
strcmp((str), "help") == 0 ? (help_output |= 1) : 0)
#define CHECKV(strv) ((strv) && (strv)[0] && \
strcmp((strv)[0], "help") == 0 ? (help_output |= 1) : 0)
if (CHECKS(opts->format)) {
const AVOutputFormat *c = NULL;
void *iter = NULL;
mp_info(log, "Available output formats:\n");
while ((c = av_muxer_iterate(&iter))) {
mp_info(log, " --of=%-13s %s\n", c->name,
c->long_name ? c->long_name : "");
}
}
if (CHECKV(opts->fopts)) {
AVFormatContext *c = avformat_alloc_context();
const AVOutputFormat *format = NULL;
mp_info(log, "Available output format ctx->options:\n");
encode_lavc_printoptions(log, c, " --ofopts=", " ", NULL,
AV_OPT_FLAG_ENCODING_PARAM,
AV_OPT_FLAG_ENCODING_PARAM);
av_free(c);
void *iter = NULL;
while ((format = av_muxer_iterate(&iter))) {
if (format->priv_class) {
mp_info(log, "Additionally, for --of=%s:\n",
format->name);
encode_lavc_printoptions(log, &format->priv_class, " --ofopts=",
" ", NULL,
AV_OPT_FLAG_ENCODING_PARAM,
AV_OPT_FLAG_ENCODING_PARAM);
}
}
}
if (CHECKV(opts->vopts)) {
AVCodecContext *c = avcodec_alloc_context3(NULL);
const AVCodec *codec = NULL;
mp_info(log, "Available output video codec ctx->options:\n");
encode_lavc_printoptions(log,
c, " --ovcopts=", " ", NULL,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_VIDEO_PARAM,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_VIDEO_PARAM);
av_free(c);
void *iter = NULL;
while ((codec = av_codec_iterate(&iter))) {
if (!av_codec_is_encoder(codec))
continue;
if (codec->type != AVMEDIA_TYPE_VIDEO)
continue;
if (opts->vcodec && opts->vcodec[0] &&
strcmp(opts->vcodec, codec->name) != 0)
continue;
if (codec->priv_class) {
mp_info(log, "Additionally, for --ovc=%s:\n",
codec->name);
encode_lavc_printoptions(log,
&codec->priv_class, " --ovcopts=",
" ", NULL,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_VIDEO_PARAM,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_VIDEO_PARAM);
}
}
}
if (CHECKV(opts->aopts)) {
AVCodecContext *c = avcodec_alloc_context3(NULL);
const AVCodec *codec = NULL;
mp_info(log, "Available output audio codec ctx->options:\n");
encode_lavc_printoptions(log,
c, " --oacopts=", " ", NULL,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_AUDIO_PARAM,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_AUDIO_PARAM);
av_free(c);
void *iter = NULL;
while ((codec = av_codec_iterate(&iter))) {
if (!av_codec_is_encoder(codec))
continue;
if (codec->type != AVMEDIA_TYPE_AUDIO)
continue;
if (opts->acodec && opts->acodec[0] &&
strcmp(opts->acodec, codec->name) != 0)
continue;
if (codec->priv_class) {
mp_info(log, "Additionally, for --oac=%s:\n",
codec->name);
encode_lavc_printoptions(log,
&codec->priv_class, " --oacopts=",
" ", NULL,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_AUDIO_PARAM,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_AUDIO_PARAM);
}
}
}
if (CHECKS(opts->vcodec)) {
const AVCodec *c = NULL;
void *iter = NULL;
mp_info(log, "Available output video codecs:\n");
while ((c = av_codec_iterate(&iter))) {
if (!av_codec_is_encoder(c))
continue;
if (c->type != AVMEDIA_TYPE_VIDEO)
continue;
mp_info(log, " --ovc=%-12s %s\n", c->name,
c->long_name ? c->long_name : "");
}
}
if (CHECKS(opts->acodec)) {
const AVCodec *c = NULL;
void *iter = NULL;
mp_info(log, "Available output audio codecs:\n");
while ((c = av_codec_iterate(&iter))) {
if (!av_codec_is_encoder(c))
continue;
if (c->type != AVMEDIA_TYPE_AUDIO)
continue;
mp_info(log, " --oac=%-12s %s\n", c->name,
c->long_name ? c->long_name : "");
}
}
return help_output;
}
int encode_lavc_getstatus(struct encode_lavc_context *ctx,
char *buf, int bufsize,
float relative_position)
{
if (!ctx)
return -1;
struct encode_priv *p = ctx->priv;
double now = mp_time_sec();
float minutes, megabytes, fps, x;
float f = MPMAX(0.0001, relative_position);
pthread_mutex_lock(&ctx->lock);
if (p->failed) {
snprintf(buf, bufsize, "(failed)\n");
goto done;
}
minutes = (now - p->t0) / 60.0 * (1 - f) / f;
megabytes = p->muxer->pb ? (avio_size(p->muxer->pb) / 1048576.0 / f) : 0;
fps = p->frames / (now - p->t0);
x = p->audioseconds / (now - p->t0);
if (p->frames) {
snprintf(buf, bufsize, "{%.1fmin %.1ffps %.1fMB}",
minutes, fps, megabytes);
} else if (p->audioseconds) {
snprintf(buf, bufsize, "{%.1fmin %.2fx %.1fMB}",
minutes, x, megabytes);
} else {
snprintf(buf, bufsize, "{%.1fmin %.1fMB}",
minutes, megabytes);
}
buf[bufsize - 1] = 0;
done:
pthread_mutex_unlock(&ctx->lock);
return 0;
}
bool encode_lavc_didfail(struct encode_lavc_context *ctx)
{
if (!ctx)
return false;
pthread_mutex_lock(&ctx->lock);
bool fail = ctx->priv->failed;
pthread_mutex_unlock(&ctx->lock);
return fail;
}
static void encoder_destroy(void *ptr)
{
struct encoder_context *p = ptr;
avcodec_free_context(&p->encoder);
free_stream(p->twopass_bytebuffer);
}
struct encoder_context *encoder_context_alloc(struct encode_lavc_context *ctx,
enum stream_type type,
struct mp_log *log)
{
if (!ctx) {
mp_err(log, "the option --o (output file) must be specified\n");
return NULL;
}
struct encoder_context *p = talloc_ptrtype(NULL, p);
talloc_set_destructor(p, encoder_destroy);
*p = (struct encoder_context){
.global = ctx->global,
.options = ctx->options,
.oformat = ctx->oformat,
.type = type,
.log = log,
.encode_lavc_ctx = ctx,
};
char *codec_name = type == STREAM_VIDEO
? p->options->vcodec
: p->options->acodec;
enum AVMediaType codec_type = mp_to_av_stream_type(type);
const char *tname = stream_type_name(type);
AVCodec *codec;
if (codec_name&& codec_name[0]) {
codec = avcodec_find_encoder_by_name(codec_name);
} else {
codec = avcodec_find_encoder(av_guess_codec(p->oformat, NULL,
p->options->file, NULL,
codec_type));
}
if (!codec) {
MP_FATAL(p, "codec for %s not found\n", tname);
goto fail;
}
if (codec->type != codec_type) {
MP_FATAL(p, "codec for %s has wrong media type\n", tname);
goto fail;
}
p->encoder = avcodec_alloc_context3(codec);
MP_HANDLE_OOM(p->encoder);
return p;
fail:
talloc_free(p);
return NULL;
}
static void encoder_2pass_prepare(struct encoder_context *p)
{
char *filename = talloc_asprintf(NULL, "%s-%s-pass1.log",
p->options->file,
stream_type_name(p->type));
if (p->encoder->flags & AV_CODEC_FLAG_PASS2) {
MP_INFO(p, "Reading 2-pass log: %s\n", filename);
struct stream *s = stream_create(filename,
STREAM_ORIGIN_DIRECT | STREAM_READ,
NULL, p->global);
if (s) {
struct bstr content = stream_read_complete(s, p, 1000000000);
if (content.start) {
p->encoder->stats_in = content.start;
} else {
MP_WARN(p, "could not read '%s', "
"disabling 2-pass encoding at pass 1\n", filename);
}
free_stream(s);
} else {
MP_WARN(p, "could not open '%s', "
"disabling 2-pass encoding at pass 2\n", filename);
p->encoder->flags &= ~(unsigned)AV_CODEC_FLAG_PASS2;
}
}
if (p->encoder->flags & AV_CODEC_FLAG_PASS1) {
MP_INFO(p, "Writing to 2-pass log: %s\n", filename);
p->twopass_bytebuffer = open_output_stream(filename, p->global);
if (!p->twopass_bytebuffer) {
MP_WARN(p, "could not open '%s', "
"disabling 2-pass encoding at pass 1\n", filename);
p->encoder->flags &= ~(unsigned)AV_CODEC_FLAG_PASS1;
}
}
talloc_free(filename);
}
bool encoder_init_codec_and_muxer(struct encoder_context *p,
void (*on_ready)(void *ctx), void *ctx)
{
assert(!avcodec_is_open(p->encoder));
char **copts = p->type == STREAM_VIDEO
? p->options->vopts
: p->options->aopts;
// Set these now, so the code below can read back parsed settings from it.
mp_set_avopts(p->log, p->encoder, copts);
encoder_2pass_prepare(p);
if (p->oformat->flags & AVFMT_GLOBALHEADER)
p->encoder->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
MP_INFO(p, "Opening encoder: %s [%s]\n",
p->encoder->codec->long_name, p->encoder->codec->name);
if (p->encoder->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) {
p->encoder->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
MP_WARN(p, "\n\n"
" ********************************************\n"
" **** Experimental codec selected! ****\n"
" ********************************************\n\n"
"This means the output file may be broken or bad.\n"
"Possible reasons, problems, workarounds:\n"
"- Codec implementation in ffmpeg/libav is not finished yet.\n"
" Try updating ffmpeg or libav.\n"
"- Bad picture quality, blocks, blurriness.\n"
" Experiment with codec settings to maybe still get the\n"
" desired quality output at the expense of bitrate.\n"
"- Broken files.\n"
" May not work at all, or break with other software.\n"
"- Slow compression.\n"
" Bear with it.\n"
"- Crashes.\n"
" Happens. Try varying options to work around.\n"
"If none of this helps you, try another codec in place of %s.\n\n",
p->encoder->codec->name);
}
if (avcodec_open2(p->encoder, p->encoder->codec, NULL) < 0) {
MP_FATAL(p, "Could not initialize encoder.\n");
goto fail;
}
p->info.timebase = p->encoder->time_base; // (_not_ changed by enc. init)
p->info.codecpar = avcodec_parameters_alloc();
MP_HANDLE_OOM(p->info.codecpar);
if (avcodec_parameters_from_context(p->info.codecpar, p->encoder) < 0)
goto fail;
encode_lavc_add_stream(p, p->encode_lavc_ctx, &p->info, on_ready, ctx);
if (!p->mux_stream)
goto fail;
return true;
fail:
avcodec_close(p->encoder);
return false;
}
bool encoder_encode(struct encoder_context *p, AVFrame *frame)
{
int status = avcodec_send_frame(p->encoder, frame);
if (status < 0) {
if (frame && status == AVERROR_EOF)
MP_ERR(p, "new data after sending EOF to encoder\n");
goto fail;
}
for (;;) {
AVPacket packet = {0};
av_init_packet(&packet);
status = avcodec_receive_packet(p->encoder, &packet);
if (status == AVERROR(EAGAIN))
break;
if (status < 0 && status != AVERROR_EOF)
goto fail;
if (p->twopass_bytebuffer && p->encoder->stats_out) {
stream_write_buffer(p->twopass_bytebuffer, p->encoder->stats_out,
strlen(p->encoder->stats_out));
}
if (status == AVERROR_EOF)
break;
encode_lavc_add_packet(p->mux_stream, &packet);
}
return true;
fail:
MP_ERR(p, "error encoding at %s\n",
frame ? av_ts2timestr(frame->pts, &p->encoder->time_base) : "EOF");
return false;
}
double encoder_get_offset(struct encoder_context *p)
{
switch (p->encoder->codec_type) {
case AVMEDIA_TYPE_VIDEO: return p->options->voffset;
case AVMEDIA_TYPE_AUDIO: return p->options->aoffset;
default: return 0;
}
}
// vim: ts=4 sw=4 et
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