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mpv/demux/demux_mkv.c

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/*
* Matroska demuxer
* Copyright (C) 2004 Aurelien Jacobs <aurel@gnuage.org>
* Based on the one written by Ronald Bultje for gstreamer
* and on demux_mkv.cpp from Moritz Bunkus.
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <inttypes.h>
#include <stdbool.h>
#include <libavutil/common.h>
#include <libavutil/lzo.h>
#include <libavutil/intreadwrite.h>
#include <libavutil/avstring.h>
#include "config.h"
#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "talloc.h"
#include "core/options.h"
#include "core/bstr.h"
#include "stream/stream.h"
#include "demux.h"
#include "stheader.h"
#include "ebml.h"
#include "matroska.h"
//#include "demux_real.h"
#include "core/mp_msg.h"
static const unsigned char sipr_swaps[38][2] = {
{0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
{13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
{25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
{42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
{77,80}
};
// Map flavour to bytes per second
#define SIPR_FLAVORS 4
#define ATRC_FLAVORS 8
#define COOK_FLAVORS 34
static const int sipr_fl2bps[SIPR_FLAVORS] = { 813, 1062, 625, 2000 };
static const int atrc_fl2bps[ATRC_FLAVORS] = {
8269, 11714, 13092, 16538, 18260, 22050, 33075, 44100 };
static const int cook_fl2bps[COOK_FLAVORS] = {
1000, 1378, 2024, 2584, 4005, 5513, 8010, 4005, 750, 2498,
4048, 5513, 8010, 11973, 8010, 2584, 4005, 2067, 2584, 2584,
4005, 4005, 5513, 5513, 8010, 12059, 1550, 8010, 12059, 5513,
12016, 16408, 22911, 33506
};
typedef struct mkv_content_encoding {
uint64_t order, type, scope;
uint64_t comp_algo;
uint8_t *comp_settings;
int comp_settings_len;
} mkv_content_encoding_t;
typedef struct mkv_track {
int tnum;
char *name;
int id; // -aid / -sid / -vid option value
char *codec_id;
int ms_compat;
char *language;
int type;
uint32_t v_width, v_height, v_dwidth, v_dheight;
double v_frate;
uint32_t a_formattag;
uint32_t a_channels, a_bps;
float a_sfreq;
float a_osfreq;
double default_duration;
int default_track;
unsigned char *private_data;
unsigned int private_size;
/* stuff for realmedia */
int realmedia;
int64_t rv_kf_base;
int rv_kf_pts;
double rv_pts; /* previous video timestamp */
double ra_pts; /* previous audio timestamp */
/** realaudio descrambling */
int sub_packet_size; ///< sub packet size, per stream
int sub_packet_h; ///< number of coded frames per block
int coded_framesize; ///< coded frame size, per stream
int audiopk_size; ///< audio packet size
unsigned char *audio_buf; ///< place to store reordered audio data
double *audio_timestamp; ///< timestamp for each audio packet
int sub_packet_cnt; ///< number of subpacket already received
int audio_filepos; ///< file position of first audio packet in block
/* stuff for quicktime */
int fix_i_bps;
double qt_last_a_pts;
int subtitle_type;
/* generic content encoding support */
mkv_content_encoding_t *encodings;
int num_encodings;
/* For VobSubs and SSA/ASS */
sh_sub_t *sh_sub;
} mkv_track_t;
typedef struct mkv_index {
int tnum;
uint64_t timecode, filepos;
} mkv_index_t;
typedef struct mkv_demuxer {
int64_t segment_start;
double duration, last_pts;
uint64_t last_filepos;
mkv_track_t **tracks;
int num_tracks;
uint64_t tc_scale, cluster_tc;
uint64_t cluster_start;
uint64_t cluster_size;
uint64_t blockgroup_size;
mkv_index_t *indexes;
int num_indexes;
int64_t *parsed_pos;
int num_parsed_pos;
bool parsed_info;
bool parsed_tracks;
bool parsed_tags;
bool parsed_chapters;
bool parsed_attachments;
struct cluster_pos {
uint64_t filepos;
uint64_t timecode;
} *cluster_positions;
int num_cluster_pos;
uint64_t skip_to_timecode;
int v_skip_to_keyframe, a_skip_to_keyframe;
int num_audio_tracks;
int num_video_tracks;
} mkv_demuxer_t;
#define REALHEADER_SIZE 16
#define RVPROPERTIES_SIZE 34
#define RAPROPERTIES4_SIZE 56
#define RAPROPERTIES5_SIZE 70
/**
* \brief ensures there is space for at least one additional element
* \param array array to grow
* \param nelem current number of elements in array
* \param elsize size of one array element
*/
static void *grow_array(void *array, int nelem, size_t elsize)
{
if (!(nelem & 31))
array = realloc(array, (nelem + 32) * elsize);
return array;
}
static bool is_parsed_header(struct mkv_demuxer *mkv_d, int64_t pos)
{
int low = 0;
int high = mkv_d->num_parsed_pos;
while (high > low + 1) {
int mid = high + low >> 1;
if (mkv_d->parsed_pos[mid] > pos)
high = mid;
else
low = mid;
}
if (mkv_d->num_parsed_pos && mkv_d->parsed_pos[low] == pos)
return true;
if (!(mkv_d->num_parsed_pos & 31))
mkv_d->parsed_pos = talloc_realloc(mkv_d, mkv_d->parsed_pos, int64_t,
mkv_d->num_parsed_pos + 32);
mkv_d->num_parsed_pos++;
for (int i = mkv_d->num_parsed_pos - 1; i > low; i--)
mkv_d->parsed_pos[i] = mkv_d->parsed_pos[i - 1];
mkv_d->parsed_pos[low] = pos;
return false;
}
static mkv_track_t *find_track_by_num(struct mkv_demuxer *d, int n, int type)
{
for (int i = 0; i < d->num_tracks; i++)
if (d->tracks[i] != NULL && d->tracks[i]->type == type)
if (d->tracks[i]->id == n)
return d->tracks[i];
return NULL;
}
static void add_cluster_position(mkv_demuxer_t *mkv_d, uint64_t filepos,
uint64_t timecode)
{
if (mkv_d->indexes)
return;
int n = mkv_d->num_cluster_pos;
if (n > 0 && mkv_d->cluster_positions[n-1].filepos >= filepos)
return;
mkv_d->cluster_positions =
grow_array(mkv_d->cluster_positions, mkv_d->num_cluster_pos,
sizeof(*mkv_d->cluster_positions));
mkv_d->cluster_positions[mkv_d->num_cluster_pos++] = (struct cluster_pos){
.filepos = filepos,
.timecode = timecode,
};
}
#define AAC_SYNC_EXTENSION_TYPE 0x02b7
static int aac_get_sample_rate_index(uint32_t sample_rate)
{
static const int srates[] = {
92017, 75132, 55426, 46009, 37566, 27713,
23004, 18783, 13856, 11502, 9391, 0
};
int i = 0;
while (sample_rate < srates[i])
i++;
return i;
}
static void demux_mkv_decode(mkv_track_t *track, uint8_t *src,
uint8_t **dest, uint32_t *size, uint32_t type)
{
uint8_t *orig_src = src;
*dest = src;
for (int i = 0; i < track->num_encodings; i++) {
struct mkv_content_encoding *enc = track->encodings + i;
if (!(enc->scope & type))
continue;
if (src != *dest && src != orig_src)
talloc_free(src);
src = *dest; // output from last iteration is new source
if (enc->comp_algo == 0) {
#if CONFIG_ZLIB
/* zlib encoded track */
if (*size == 0)
continue;
z_stream zstream;
zstream.zalloc = (alloc_func) 0;
zstream.zfree = (free_func) 0;
zstream.opaque = (voidpf) 0;
if (inflateInit(&zstream) != Z_OK) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] zlib initialization failed.\n");
goto error;
}
zstream.next_in = (Bytef *) src;
zstream.avail_in = *size;
*dest = NULL;
zstream.avail_out = *size;
int result;
do {
*size += 4000;
*dest = talloc_realloc_size(NULL, *dest, *size);
zstream.next_out = (Bytef *) (*dest + zstream.total_out);
result = inflate(&zstream, Z_NO_FLUSH);
if (result != Z_OK && result != Z_STREAM_END) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] zlib decompression failed.\n");
talloc_free(*dest);
*dest = NULL;
inflateEnd(&zstream);
goto error;
}
zstream.avail_out += 4000;
} while (zstream.avail_out == 4000 && zstream.avail_in != 0
&& result != Z_STREAM_END);
*size = zstream.total_out;
inflateEnd(&zstream);
#endif
} else if (enc->comp_algo == 2) {
/* lzo encoded track */
int out_avail;
int dstlen = *size * 3;
*dest = NULL;
while (1) {
int srclen = *size;
*dest = talloc_realloc_size(NULL, *dest,
dstlen + AV_LZO_OUTPUT_PADDING);
out_avail = dstlen;
int result = av_lzo1x_decode(*dest, &out_avail, src, &srclen);
if (result == 0)
break;
if (!(result & AV_LZO_OUTPUT_FULL)) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] lzo decompression failed.\n");
talloc_free(*dest);
*dest = NULL;
goto error;
}
mp_msg(MSGT_DEMUX, MSGL_DBG2,
"[mkv] lzo decompression buffer too small.\n");
dstlen *= 2;
}
*size = dstlen - out_avail;
} else if (enc->comp_algo == 3) {
*dest = talloc_size(NULL, *size + enc->comp_settings_len);
memcpy(*dest, enc->comp_settings, enc->comp_settings_len);
memcpy(*dest + enc->comp_settings_len, src, *size);
*size += enc->comp_settings_len;
}
}
error:
if (src != *dest && src != orig_src)
talloc_free(src);
}
static int demux_mkv_read_info(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
stream_t *s = demuxer->stream;
int res = 0;
mkv_d->tc_scale = 1000000;
mkv_d->duration = 0;
struct ebml_info info = {};
struct ebml_parse_ctx parse_ctx = {};
if (ebml_read_element(s, &parse_ctx, &info, &ebml_info_desc) < 0)
return -1;
if (info.n_timecode_scale) {
mkv_d->tc_scale = info.timecode_scale;
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] | + timecode scale: %" PRIu64 "\n", mkv_d->tc_scale);
}
if (info.n_duration) {
mkv_d->duration = info.duration * mkv_d->tc_scale / 1e9;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + duration: %.3fs\n",
mkv_d->duration);
}
if (info.n_segment_uid) {
int len = info.segment_uid.len;
if (len != sizeof(demuxer->matroska_data.segment_uid)) {
mp_msg(MSGT_DEMUX, MSGL_INFO,
"[mkv] segment uid invalid length %d\n", len);
} else {
memcpy(demuxer->matroska_data.segment_uid, info.segment_uid.start,
len);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + segment uid");
for (int i = 0; i < len; i++)
mp_msg(MSGT_DEMUX, MSGL_V, " %02x",
demuxer->matroska_data.segment_uid[i]);
mp_msg(MSGT_DEMUX, MSGL_V, "\n");
}
}
if (demuxer->params && demuxer->params->matroska_wanted_uids) {
unsigned char (*uids)[16] = demuxer->params->matroska_wanted_uids;
if (!info.n_segment_uid)
uids = NULL;
for (int i = 0; i < MP_TALLOC_ELEMS(uids); i++) {
if (!memcmp(info.segment_uid.start, uids[i], 16))
goto out;
}
mp_tmsg(MSGT_DEMUX, MSGL_INFO,
"[mkv] This is not one of the wanted files. "
"Stopping attempt to open.\n");
res = -2;
}
out:
talloc_free(parse_ctx.talloc_ctx);
return res;
}
static void parse_trackencodings(struct demuxer *demuxer,
struct mkv_track *track,
struct ebml_content_encodings *encodings)
{
// initial allocation to be a non-NULL context before realloc
mkv_content_encoding_t *ce = talloc_size(track, 1);
for (int n_enc = 0; n_enc < encodings->n_content_encoding; n_enc++) {
struct ebml_content_encoding *enc = encodings->content_encoding + n_enc;
struct mkv_content_encoding e = {};
e.order = enc->content_encoding_order;
if (enc->n_content_encoding_scope)
e.scope = enc->content_encoding_scope;
else
e.scope = 1;
e.type = enc->content_encoding_type;
if (enc->n_content_compression) {
struct ebml_content_compression *z = &enc->content_compression;
e.comp_algo = z->content_comp_algo;
if (z->n_content_comp_settings) {
int sz = z->content_comp_settings.len;
e.comp_settings = talloc_size(ce, sz);
memcpy(e.comp_settings, z->content_comp_settings.start, sz);
e.comp_settings_len = sz;
}
}
if (e.type == 1) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Track "
"number %u has been encrypted and "
"decryption has not yet been\n"
"[mkv] implemented. Skipping track.\n",
track->tnum);
} else if (e.type != 0) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] Unknown content encoding type for "
"track %u. Skipping track.\n",
track->tnum);
} else if (e.comp_algo != 0 && e.comp_algo != 2 && e.comp_algo != 3) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] Track %u has been compressed with "
"an unknown/unsupported compression\n"
"[mkv] algorithm (%" PRIu64 "). Skipping track.\n",
track->tnum, e.comp_algo);
}
#if !CONFIG_ZLIB
else if (e.comp_algo == 0) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN,
"[mkv] Track %u was compressed with zlib "
"but mpv has not been compiled\n"
"[mkv] with support for zlib compression. "
"Skipping track.\n",
track->tnum);
}
#endif
int i;
for (i = 0; i < n_enc; i++)
if (e.order >= ce[i].order)
break;
ce = talloc_realloc_size(track, ce, (n_enc + 1) * sizeof(*ce));
memmove(ce + i + 1, ce + i, (n_enc - i) * sizeof(*ce));
memcpy(ce + i, &e, sizeof(e));
}
track->encodings = ce;
track->num_encodings = encodings->n_content_encoding;
}
static void parse_trackaudio(struct demuxer *demuxer, struct mkv_track *track,
struct ebml_audio *audio)
{
if (audio->n_sampling_frequency) {
track->a_sfreq = audio->sampling_frequency;
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] | + Sampling frequency: %f\n", track->a_sfreq);
} else
track->a_sfreq = 8000;
if (audio->n_output_sampling_frequency) {
track->a_osfreq = audio->output_sampling_frequency;
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] | + Output sampling frequency: %f\n", track->a_osfreq);
} else
track->a_osfreq = track->a_sfreq;
if (audio->n_bit_depth) {
track->a_bps = audio->bit_depth;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Bit depth: %u\n",
track->a_bps);
}
if (audio->n_channels) {
track->a_channels = audio->channels;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Channels: %u\n",
track->a_channels);
} else
track->a_channels = 1;
}
static void parse_trackvideo(struct demuxer *demuxer, struct mkv_track *track,
struct ebml_video *video)
{
if (video->n_frame_rate) {
track->v_frate = video->frame_rate;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Frame rate: %f\n",
track->v_frate);
if (track->v_frate > 0)
track->default_duration = 1 / track->v_frate;
}
if (video->n_display_width) {
track->v_dwidth = video->display_width;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Display width: %u\n",
track->v_dwidth);
}
if (video->n_display_height) {
track->v_dheight = video->display_height;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Display height: %u\n",
track->v_dheight);
}
if (video->n_pixel_width) {
track->v_width = video->pixel_width;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Pixel width: %u\n",
track->v_width);
}
if (video->n_pixel_height) {
track->v_height = video->pixel_height;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Pixel height: %u\n",
track->v_height);
}
}
/**
* \brief free any data associated with given track
* \param track track of which to free data
*/
static void demux_mkv_free_trackentry(mkv_track_t *track)
{
free(track->audio_buf);
free(track->audio_timestamp);
talloc_free(track);
}
static void parse_trackentry(struct demuxer *demuxer,
struct ebml_track_entry *entry)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
struct mkv_track *track = talloc_zero_size(NULL, sizeof(*track));
track->tnum = entry->track_number;
if (track->tnum)
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Track number: %u\n",
track->tnum);
else
mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Missing track number!\n");
if (entry->n_name) {
track->name = talloc_strndup(track, entry->name.start,
entry->name.len);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Name: %s\n",
track->name);
}
track->type = entry->track_type;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Track type: ");
switch (track->type) {
case MATROSKA_TRACK_AUDIO:
mp_msg(MSGT_DEMUX, MSGL_V, "Audio\n");
break;
case MATROSKA_TRACK_VIDEO:
mp_msg(MSGT_DEMUX, MSGL_V, "Video\n");
break;
case MATROSKA_TRACK_SUBTITLE:
mp_msg(MSGT_DEMUX, MSGL_V, "Subtitle\n");
break;
default:
mp_msg(MSGT_DEMUX, MSGL_V, "unknown\n");
break;
}
if (entry->n_audio) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Audio track\n");
parse_trackaudio(demuxer, track, &entry->audio);
}
if (entry->n_video) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Video track\n");
parse_trackvideo(demuxer, track, &entry->video);
}
if (entry->n_codec_id) {
track->codec_id = talloc_strndup(track, entry->codec_id.start,
entry->codec_id.len);
if (!strcmp(track->codec_id, MKV_V_MSCOMP)
|| !strcmp(track->codec_id, MKV_A_ACM))
track->ms_compat = 1;
else if (!strcmp(track->codec_id, MKV_S_VOBSUB))
track->subtitle_type = 'v';
else if (!strcmp(track->codec_id, MKV_S_TEXTSSA)
|| !strcmp(track->codec_id, MKV_S_TEXTASS)
|| !strcmp(track->codec_id, MKV_S_SSA)
|| !strcmp(track->codec_id, MKV_S_ASS))
track->subtitle_type = 'a';
else if (!strcmp(track->codec_id, MKV_S_TEXTASCII)
|| !strcmp(track->codec_id, MKV_S_TEXTUTF8))
track->subtitle_type = 't';
else if (!strcmp(track->codec_id, MKV_S_PGS))
track->subtitle_type = 'p';
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Codec ID: %s\n",
track->codec_id);
} else
mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Missing codec ID!\n");
if (entry->n_codec_private) {
int len = entry->codec_private.len;
track->private_data = talloc_size(track, len + AV_LZO_INPUT_PADDING);
memcpy(track->private_data, entry->codec_private.start, len);
track->private_size = len;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + CodecPrivate, length %u\n",
track->private_size);
}
if (entry->n_language) {
track->language = talloc_strndup(track, entry->language.start,
entry->language.len);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Language: %s\n",
track->language);
} else
track->language = talloc_strdup(track, "eng");
if (entry->n_flag_default) {
track->default_track = entry->flag_default;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Default flag: %u\n",
track->default_track);
} else
track->default_track = 1;
if (entry->n_default_duration) {
track->default_duration = entry->default_duration / 1e9;
if (entry->default_duration == 0)
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Default duration: 0");
else {
if (!track->v_frate)
track->v_frate = 1e9 / entry->default_duration;
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] | + Default duration: %.3fms ( = %.3f fps)\n",
entry->default_duration / 1000000.0, track->v_frate);
}
}
if (entry->n_content_encodings)
parse_trackencodings(demuxer, track, &entry->content_encodings);
mkv_d->tracks[mkv_d->num_tracks++] = track;
}
static int demux_mkv_read_tracks(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
struct ebml_tracks tracks = {};
struct ebml_parse_ctx parse_ctx = {};
if (ebml_read_element(s, &parse_ctx, &tracks, &ebml_tracks_desc) < 0)
return -1;
mkv_d->tracks = talloc_size(mkv_d,
tracks.n_track_entry * sizeof(*mkv_d->tracks));
for (int i = 0; i < tracks.n_track_entry; i++) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + a track...\n");
parse_trackentry(demuxer, &tracks.track_entry[i]);
}
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
static int demux_mkv_read_cues(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
if (index_mode == 0 || index_mode == 2) {
ebml_read_skip(s, NULL);
return 0;
}
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing cues ] -----------\n");
struct ebml_cues cues = {};
struct ebml_parse_ctx parse_ctx = {};
if (ebml_read_element(s, &parse_ctx, &cues, &ebml_cues_desc) < 0)
return -1;
for (int i = 0; i < cues.n_cue_point; i++) {
struct ebml_cue_point *cuepoint = &cues.cue_point[i];
if (cuepoint->n_cue_time != 1 || !cuepoint->n_cue_track_positions) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Malformed CuePoint element\n");
continue;
}
uint64_t time = cuepoint->cue_time;
for (int i = 0; i < cuepoint->n_cue_track_positions; i++) {
struct ebml_cue_track_positions *trackpos =
&cuepoint->cue_track_positions[i];
uint64_t track = trackpos->cue_track;
uint64_t pos = trackpos->cue_cluster_position;
mkv_d->indexes =
grow_array(mkv_d->indexes, mkv_d->num_indexes,
sizeof(mkv_index_t));
mkv_d->indexes[mkv_d->num_indexes].tnum = track;
mkv_d->indexes[mkv_d->num_indexes].timecode = time;
mkv_d->indexes[mkv_d->num_indexes].filepos =
mkv_d->segment_start + pos;
mp_msg(MSGT_DEMUX, MSGL_DBG2,
"[mkv] |+ found cue point for track %" PRIu64
": timecode %" PRIu64 ", filepos: %" PRIu64 "\n", track,
time, mkv_d->segment_start + pos);
mkv_d->num_indexes++;
}
}
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] \\---- [ parsing cues ] -----------\n");
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
static int demux_mkv_read_chapters(struct demuxer *demuxer)
{
struct MPOpts *opts = demuxer->opts;
stream_t *s = demuxer->stream;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing chapters ] ---------\n");
struct ebml_chapters file_chapters = {};
struct ebml_parse_ctx parse_ctx = {};
if (ebml_read_element(s, &parse_ctx, &file_chapters,
&ebml_chapters_desc) < 0)
return -1;
int selected_edition = 0;
int num_editions = file_chapters.n_edition_entry;
struct ebml_edition_entry *editions = file_chapters.edition_entry;
if (opts->edition_id >= 0 && opts->edition_id < num_editions) {
selected_edition = opts->edition_id;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] User-specified edition: %d\n",
selected_edition);
} else
for (int i = 0; i < num_editions; i++)
if (editions[i].edition_flag_default) {
selected_edition = i;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Default edition: %d\n", i);
break;
}
struct matroska_chapter *m_chapters = NULL;
if (editions[selected_edition].edition_flag_ordered) {
int count = editions[selected_edition].n_chapter_atom;
m_chapters = talloc_array_ptrtype(demuxer, m_chapters, count);
demuxer->matroska_data.ordered_chapters = m_chapters;
demuxer->matroska_data.num_ordered_chapters = count;
}
for (int idx = 0; idx < num_editions; idx++) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] New edition %d\n", idx);
int warn_level = idx == selected_edition ? MSGL_WARN : MSGL_V;
if (editions[idx].n_edition_flag_default)
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Default edition flag: %"PRIu64
"\n", editions[idx].edition_flag_default);
if (editions[idx].n_edition_flag_ordered)
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Ordered chapter flag: %"PRIu64
"\n", editions[idx].edition_flag_ordered);
for (int i = 0; i < editions[idx].n_chapter_atom; i++) {
struct ebml_chapter_atom *ca = editions[idx].chapter_atom + i;
struct matroska_chapter chapter = { };
struct bstr name = { "(unnamed)", 9 };
if (!ca->n_chapter_time_start)
mp_msg(MSGT_DEMUX, warn_level,
"[mkv] Chapter lacks start time\n");
chapter.start = ca->chapter_time_start;
chapter.end = ca->chapter_time_end;
if (ca->n_chapter_display) {
if (ca->n_chapter_display > 1)
mp_msg(MSGT_DEMUX, warn_level, "[mkv] Multiple chapter "
"names not supported, picking first\n");
if (!ca->chapter_display[0].n_chap_string)
mp_msg(MSGT_DEMUX, warn_level, "[mkv] Malformed chapter "
"name entry\n");
else
name = ca->chapter_display[0].chap_string;
}
if (ca->n_chapter_segment_uid) {
chapter.has_segment_uid = true;
int len = ca->chapter_segment_uid.len;
if (len != sizeof(chapter.segment_uid))
mp_msg(MSGT_DEMUX, warn_level,
"[mkv] Chapter segment uid bad length %d\n", len);
else if (ca->n_chapter_segment_edition_uid) {
mp_tmsg(MSGT_DEMUX, warn_level, "[mkv] Warning: "
"unsupported edition recursion in chapter; "
"will skip on playback!\n");
} else {
memcpy(chapter.segment_uid, ca->chapter_segment_uid.start,
len);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Chapter segment uid ");
for (int i = 0; i < len; i++)
mp_msg(MSGT_DEMUX, MSGL_V, "%02x ",
chapter.segment_uid[i]);
mp_msg(MSGT_DEMUX, MSGL_V, "\n");
}
}
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] Chapter %u from %02d:%02d:%02d.%03d "
"to %02d:%02d:%02d.%03d, %.*s\n", i,
(int) (chapter.start / 60 / 60 / 1000000000),
(int) ((chapter.start / 60 / 1000000000) % 60),
(int) ((chapter.start / 1000000000) % 60),
(int) (chapter.start % 1000000000),
(int) (chapter.end / 60 / 60 / 1000000000),
(int) ((chapter.end / 60 / 1000000000) % 60),
(int) ((chapter.end / 1000000000) % 60),
(int) (chapter.end % 1000000000),
BSTR_P(name));
if (idx == selected_edition){
demuxer_add_chapter(demuxer, name, chapter.start, chapter.end);
if (editions[idx].edition_flag_ordered) {
chapter.name = talloc_strndup(m_chapters, name.start,
name.len);
m_chapters[i] = chapter;
}
}
}
}
if (num_editions > 1)
mp_msg(MSGT_DEMUX, MSGL_INFO,
"[mkv] Found %d editions, will play #%d (first is 0).\n",
num_editions, selected_edition);
demuxer->num_editions = num_editions;
demuxer->edition = selected_edition;
talloc_free(parse_ctx.talloc_ctx);
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] \\---- [ parsing chapters ] ---------\n");
return 0;
}
static int demux_mkv_read_tags(demuxer_t *demuxer)
{
stream_t *s = demuxer->stream;
struct ebml_parse_ctx parse_ctx = {};
struct ebml_tags tags = {};
if (ebml_read_element(s, &parse_ctx, &tags, &ebml_tags_desc) < 0)
return -1;
for (int i = 0; i < tags.n_tag; i++) {
struct ebml_tag tag = tags.tag[i];
if (tag.targets.target_track_uid || tag.targets.target_edition_uid ||
tag.targets.target_chapter_uid || tag.targets.target_attachment_uid)
continue;
for (int j = 0; j < tag.n_simple_tag; j++)
demux_info_add_bstr(demuxer, tag.simple_tag[j].tag_name, tag.simple_tag[j].tag_string);
}
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
static int demux_mkv_read_attachments(demuxer_t *demuxer)
{
stream_t *s = demuxer->stream;
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] /---- [ parsing attachments ] ---------\n");
struct ebml_attachments attachments = {};
struct ebml_parse_ctx parse_ctx = {};
if (ebml_read_element(s, &parse_ctx, &attachments,
&ebml_attachments_desc) < 0)
return -1;
for (int i = 0; i < attachments.n_attached_file; i++) {
struct ebml_attached_file *attachment = &attachments.attached_file[i];
if (!attachment->n_file_name || !attachment->n_file_mime_type
|| !attachment->n_file_data) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Malformed attachment\n");
continue;
}
struct bstr name = attachment->file_name;
struct bstr mime = attachment->file_mime_type;
demuxer_add_attachment(demuxer, name, mime, attachment->file_data);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Attachment: %.*s, %.*s, %zu bytes\n",
BSTR_P(name), BSTR_P(mime), attachment->file_data.len);
}
talloc_free(parse_ctx.talloc_ctx);
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] \\---- [ parsing attachments ] ---------\n");
return 0;
}
static int read_header_element(struct demuxer *demuxer, uint32_t id,
int64_t at_filepos);
static int demux_mkv_read_seekhead(demuxer_t *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
struct stream *s = demuxer->stream;
int res = 0;
struct ebml_seek_head seekhead = {};
struct ebml_parse_ctx parse_ctx = {};
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] /---- [ parsing seek head ] ---------\n");
if (ebml_read_element(s, &parse_ctx, &seekhead, &ebml_seek_head_desc) < 0) {
res = -1;
goto out;
}
/* off now holds the position of the next element after the seek head. */
int64_t off = stream_tell(s);
for (int i = 0; i < seekhead.n_seek; i++) {
struct ebml_seek *seek = &seekhead.seek[i];
if (seek->n_seek_id != 1 || seek->n_seek_position != 1) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Invalid SeekHead entry\n");
continue;
}
uint64_t pos = seek->seek_position + mkv_d->segment_start;
if (pos >= demuxer->movi_end) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] SeekHead position beyond "
"end of file - incomplete file?\n");
continue;
}
int r = read_header_element(demuxer, seek->seek_id, pos);
if (r <= -2) {
res = r;
goto out;
}
}
if (!stream_seek(s, off)) {
mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Couldn't seek back after "
"SeekHead??\n");
res = -1;
}
out:
mp_msg(MSGT_DEMUX, MSGL_V,
"[mkv] \\---- [ parsing seek head ] ---------\n");
talloc_free(parse_ctx.talloc_ctx);
return res;
}
static bool seek_pos_id(struct stream *s, int64_t pos, uint32_t id)
{
if (!stream_seek(s, pos)) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Failed to seek in file\n");
return false;
}
if (ebml_read_id(s, NULL) != id) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Expected element not found\n");
return false;
}
return true;
}
static int read_header_element(struct demuxer *demuxer, uint32_t id,
int64_t at_filepos)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
stream_t *s = demuxer->stream;
int64_t pos = stream_tell(s) - 4;
int res = 1;
switch(id) {
case MATROSKA_ID_INFO:
if (mkv_d->parsed_info)
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ segment information...\n");
mkv_d->parsed_info = true;
return demux_mkv_read_info(demuxer);
case MATROSKA_ID_TRACKS:
if (mkv_d->parsed_tracks)
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
mkv_d->parsed_tracks = true;
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ segment tracks...\n");
return demux_mkv_read_tracks(demuxer);
case MATROSKA_ID_CUES:
if (is_parsed_header(mkv_d, pos))
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
return demux_mkv_read_cues(demuxer);
case MATROSKA_ID_TAGS:
if (mkv_d->parsed_tags)
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
mkv_d->parsed_tags = true;
return demux_mkv_read_tags(demuxer);
case MATROSKA_ID_SEEKHEAD:
if (is_parsed_header(mkv_d, pos))
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
return demux_mkv_read_seekhead(demuxer);
case MATROSKA_ID_CHAPTERS:
if (mkv_d->parsed_chapters)
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
mkv_d->parsed_chapters = true;
return demux_mkv_read_chapters(demuxer);
case MATROSKA_ID_ATTACHMENTS:
if (mkv_d->parsed_attachments)
break;
if (at_filepos && !seek_pos_id(s, at_filepos, id))
return -1;
mkv_d->parsed_attachments = true;
return demux_mkv_read_attachments(demuxer);
case EBML_ID_VOID:
break;
default:
res = 2;
}
if (!at_filepos)
ebml_read_skip(s, NULL);
return res;
}
static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track,
int vid);
static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track,
int aid);
static int demux_mkv_open_sub(demuxer_t *demuxer, mkv_track_t *track,
int sid);
static void display_create_tracks(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
int i, vid = 0, aid = 0, sid = 0;
for (i = 0; i < mkv_d->num_tracks; i++) {
char *type = "unknown", str[32];
*str = '\0';
switch (mkv_d->tracks[i]->type) {
case MATROSKA_TRACK_VIDEO:
type = "video";
mkv_d->tracks[i]->id = -1;
if (vid == MAX_V_STREAMS)
break;
mkv_d->tracks[i]->id = vid;
demux_mkv_open_video(demuxer, mkv_d->tracks[i], vid);
if (mkv_d->tracks[i]->name)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_VID_%d_NAME=%s\n", vid,
mkv_d->tracks[i]->name);
sprintf(str, "-vid %u", vid++);
break;
case MATROSKA_TRACK_AUDIO:
type = "audio";
mkv_d->tracks[i]->id = -1;
if (aid == MAX_A_STREAMS)
break;
mkv_d->tracks[i]->id = aid;
demux_mkv_open_audio(demuxer, mkv_d->tracks[i], aid);
if (mkv_d->tracks[i]->name)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_NAME=%s\n", aid,
mkv_d->tracks[i]->name);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_AID_%d_LANG=%s\n", aid,
mkv_d->tracks[i]->language);
sprintf(str, "-aid %u, -alang %.5s", aid++,
mkv_d->tracks[i]->language);
break;
case MATROSKA_TRACK_SUBTITLE:
type = "subtitles";
mkv_d->tracks[i]->id = -1;
if (sid == MAX_S_STREAMS)
break;
mkv_d->tracks[i]->id = sid;
demux_mkv_open_sub(demuxer, mkv_d->tracks[i], sid);
if (mkv_d->tracks[i]->name)
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_NAME=%s\n", sid,
mkv_d->tracks[i]->name);
mp_msg(MSGT_IDENTIFY, MSGL_INFO, "ID_SID_%d_LANG=%s\n", sid,
mkv_d->tracks[i]->language);
sprintf(str, "-sid %u, -slang %.5s", sid++,
mkv_d->tracks[i]->language);
break;
}
if (mkv_d->tracks[i]->name)
mp_tmsg(MSGT_DEMUX, MSGL_V,
"[mkv] Track ID %u: %s (%s) \"%s\", %s\n",
mkv_d->tracks[i]->tnum, type, mkv_d->tracks[i]->codec_id,
mkv_d->tracks[i]->name, str);
else
mp_tmsg(MSGT_DEMUX, MSGL_V, "[mkv] Track ID %u: %s (%s), %s\n",
mkv_d->tracks[i]->tnum, type, mkv_d->tracks[i]->codec_id,
str);
}
mkv_d->num_audio_tracks = aid;
mkv_d->num_video_tracks = vid;
}
typedef struct {
char *id;
int fourcc;
int extradata;
} videocodec_info_t;
static const videocodec_info_t vinfo[] = {
{MKV_V_MJPEG, mmioFOURCC('m', 'j', 'p', 'g'), 1},
{MKV_V_MPEG1, mmioFOURCC('m', 'p', 'g', '1'), 0},
{MKV_V_MPEG2, mmioFOURCC('m', 'p', 'g', '2'), 0},
{MKV_V_MPEG4_SP, mmioFOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_ASP, mmioFOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AP, mmioFOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AVC, mmioFOURCC('a', 'v', 'c', '1'), 1},
{MKV_V_THEORA, mmioFOURCC('t', 'h', 'e', 'o'), 1},
{MKV_V_VP8, mmioFOURCC('V', 'P', '8', '0'), 0},
{NULL, 0, 0}
};
static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track,
int vid)
{
BITMAPINFOHEADER *bih;
sh_video_t *sh_v;
if (track->ms_compat) { /* MS compatibility mode */
BITMAPINFOHEADER *src;
if (track->private_data == NULL
|| track->private_size < sizeof(*bih))
return 1;
src = (BITMAPINFOHEADER *) track->private_data;
bih = calloc(1, track->private_size);
bih->biSize = le2me_32(src->biSize);
bih->biWidth = le2me_32(src->biWidth);
bih->biHeight = le2me_32(src->biHeight);
bih->biPlanes = le2me_16(src->biPlanes);
bih->biBitCount = le2me_16(src->biBitCount);
bih->biCompression = le2me_32(src->biCompression);
bih->biSizeImage = le2me_32(src->biSizeImage);
bih->biXPelsPerMeter = le2me_32(src->biXPelsPerMeter);
bih->biYPelsPerMeter = le2me_32(src->biYPelsPerMeter);
bih->biClrUsed = le2me_32(src->biClrUsed);
bih->biClrImportant = le2me_32(src->biClrImportant);
memcpy(bih + 1,
src + 1,
track->private_size - sizeof(*bih));
if (track->v_width == 0)
track->v_width = bih->biWidth;
if (track->v_height == 0)
track->v_height = bih->biHeight;
} else {
bih = calloc(1, sizeof(*bih));
bih->biSize = sizeof(*bih);
bih->biWidth = track->v_width;
bih->biHeight = track->v_height;
bih->biBitCount = 24;
bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount / 8;
if (track->private_size >= RVPROPERTIES_SIZE
&& (!strcmp(track->codec_id, MKV_V_REALV10)
|| !strcmp(track->codec_id, MKV_V_REALV20)
|| !strcmp(track->codec_id, MKV_V_REALV30)
|| !strcmp(track->codec_id, MKV_V_REALV40))) {
unsigned char *dst, *src;
uint32_t type2;
unsigned int cnt;
src = (uint8_t *) track->private_data + RVPROPERTIES_SIZE;
cnt = track->private_size - RVPROPERTIES_SIZE;
bih = realloc(bih, sizeof(*bih) + 8 + cnt);
bih->biSize = 48 + cnt;
bih->biPlanes = 1;
type2 = AV_RB32(src - 4);
if (type2 == 0x10003000 || type2 == 0x10003001)
bih->biCompression = mmioFOURCC('R', 'V', '1', '3');
else
bih->biCompression =
mmioFOURCC('R', 'V', track->codec_id[9], '0');
dst = (unsigned char *) (bih + 1);
// copy type1 and type2 info from rv properties
memcpy(dst, src - 8, 8 + cnt);
track->realmedia = 1;
} else {
const videocodec_info_t *vi = vinfo;
while (vi->id && strcmp(vi->id, track->codec_id))
vi++;
bih->biCompression = vi->fourcc;
if (vi->extradata && track->private_data
&& (track->private_size > 0)) {
bih->biSize += track->private_size;
bih = realloc(bih, bih->biSize);
memcpy(bih + 1, track->private_data, track->private_size);
}
if (!vi->id) {
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unknown/unsupported "
"CodecID (%s) or missing/bad CodecPrivate\n"
"[mkv] data (track %u).\n",
track->codec_id, track->tnum);
free(bih);
return 1;
}
}
}
sh_v = new_sh_video(demuxer, vid);
sh_v->gsh->demuxer_id = track->tnum;
sh_v->demuxer_codecname = track->codec_id;
sh_v->gsh->title = talloc_strdup(sh_v, track->name);
sh_v->bih = bih;
sh_v->format = sh_v->bih->biCompression;
if (track->v_frate == 0.0)
track->v_frate = 25.0;
sh_v->fps = track->v_frate;
sh_v->frametime = 1 / track->v_frate;
sh_v->aspect = 0;
if (!track->realmedia) {
sh_v->disp_w = track->v_width;
sh_v->disp_h = track->v_height;
if (track->v_dheight)
sh_v->aspect = (double) track->v_dwidth / track->v_dheight;
} else {
// vd_realvid.c will set aspect to disp_w/disp_h and rederive
// disp_w and disp_h from the RealVideo stream contents returned
// by the Real DLLs. If DisplayWidth/DisplayHeight was not set in
// the Matroska file then it has already been set to PixelWidth/Height
// by check_track_information.
sh_v->disp_w = track->v_dwidth;
sh_v->disp_h = track->v_dheight;
}
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Aspect: %f\n", sh_v->aspect);
sh_v->ds = demuxer->video;
return 0;
}
static struct mkv_audio_tag {
char *id; bool prefix; uint32_t formattag;
} mkv_audio_tags[] = {
{ MKV_A_MP2, 0, 0x0055 },
{ MKV_A_MP3, 0, 0x0055 },
{ MKV_A_AC3, 1, 0x2000 },
{ MKV_A_EAC3, 1, mmioFOURCC('E', 'A', 'C', '3') },
{ MKV_A_DTS, 0, 0x2001 },
{ MKV_A_PCM, 0, 0x0001 },
{ MKV_A_PCM_BE, 0, 0x0001 },
{ MKV_A_AAC_2MAIN, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_2LC, 1, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_2SSR, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4MAIN, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4LC, 1, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4SSR, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4LTP, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC, 0, mmioFOURCC('M', 'P', '4', 'A') },
{ MKV_A_VORBIS, 0, mmioFOURCC('v', 'r', 'b', 's') },
{ MKV_A_QDMC, 0, mmioFOURCC('Q', 'D', 'M', 'C') },
{ MKV_A_QDMC2, 0, mmioFOURCC('Q', 'D', 'M', '2') },
{ MKV_A_WAVPACK, 0, mmioFOURCC('W', 'V', 'P', 'K') },
{ MKV_A_TRUEHD, 0, mmioFOURCC('T', 'R', 'H', 'D') },
{ MKV_A_FLAC, 0, mmioFOURCC('f', 'L', 'a', 'C') },
{ MKV_A_REAL28, 0, mmioFOURCC('2', '8', '_', '8') },
{ MKV_A_REALATRC, 0, mmioFOURCC('a', 't', 'r', 'c') },
{ MKV_A_REALCOOK, 0, mmioFOURCC('c', 'o', 'o', 'k') },
{ MKV_A_REALDNET, 0, mmioFOURCC('d', 'n', 'e', 't') },
{ MKV_A_REALSIPR, 0, mmioFOURCC('s', 'i', 'p', 'r') },
{ MKV_A_TTA1, 0, mmioFOURCC('T', 'T', 'A', '1') },
{ NULL },
};
static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track,
int aid)
{
sh_audio_t *sh_a = new_sh_audio(demuxer, aid);
if (!sh_a)
return 1;
if (track->language && (strcmp(track->language, "und") != 0))
sh_a->lang = talloc_strdup(sh_a, track->language);
sh_a->gsh->demuxer_id = track->tnum;
sh_a->demuxer_codecname = track->codec_id;
sh_a->gsh->title = talloc_strdup(sh_a, track->name);
sh_a->gsh->default_track = track->default_track;
sh_a->ds = demuxer->audio;
if (track->ms_compat) {
if (track->private_size < sizeof(*sh_a->wf))
goto error;
WAVEFORMATEX *wf = (WAVEFORMATEX *) track->private_data;
sh_a->wf = calloc(1, track->private_size);
sh_a->wf->wFormatTag = le2me_16(wf->wFormatTag);
sh_a->wf->nChannels = le2me_16(wf->nChannels);
sh_a->wf->nSamplesPerSec = le2me_32(wf->nSamplesPerSec);
sh_a->wf->nAvgBytesPerSec = le2me_32(wf->nAvgBytesPerSec);
sh_a->wf->nBlockAlign = le2me_16(wf->nBlockAlign);
sh_a->wf->wBitsPerSample = le2me_16(wf->wBitsPerSample);
sh_a->wf->cbSize = track->private_size - sizeof(*sh_a->wf);
memcpy(sh_a->wf + 1, wf + 1,
track->private_size - sizeof(*sh_a->wf));
if (track->a_sfreq == 0.0)
track->a_sfreq = sh_a->wf->nSamplesPerSec;
if (track->a_channels == 0)
track->a_channels = sh_a->wf->nChannels;
if (track->a_bps == 0)
track->a_bps = sh_a->wf->wBitsPerSample;
track->a_formattag = sh_a->wf->wFormatTag;
} else {
sh_a->wf = calloc(1, sizeof(*sh_a->wf));
for (int i = 0; ; i++) {
struct mkv_audio_tag *t = mkv_audio_tags + i;
if (t->id == NULL)
goto error;
if (t->prefix) {
if (!bstr_startswith0(bstr0(track->codec_id), t->id))
continue;
} else {
if (strcmp(track->codec_id, t->id))
continue;
}
track->a_formattag = t->formattag;
break;
}
}
sh_a->format = track->a_formattag;
sh_a->wf->wFormatTag = track->a_formattag;
sh_a->channels = track->a_channels;
sh_a->wf->nChannels = track->a_channels;
sh_a->samplerate = (uint32_t) track->a_sfreq;
sh_a->container_out_samplerate = track->a_osfreq;
sh_a->wf->nSamplesPerSec = (uint32_t) track->a_sfreq;
if (track->a_bps == 0) {
sh_a->samplesize = 2;
sh_a->wf->wBitsPerSample = 16;
} else {
sh_a->samplesize = track->a_bps / 8;
sh_a->wf->wBitsPerSample = track->a_bps;
}
if (track->a_formattag == 0x0055) { /* MP3 || MP2 */
sh_a->wf->nAvgBytesPerSec = 16000;
sh_a->wf->nBlockAlign = 1152;
} else if ((track->a_formattag == 0x2000) /* AC3 */
|| track->a_formattag == mmioFOURCC('E', 'A', 'C', '3')
|| (track->a_formattag == 0x2001)) { /* DTS */
free(sh_a->wf);
sh_a->wf = NULL;
} else if (track->a_formattag == 0x0001) { /* PCM || PCM_BE */
sh_a->wf->nAvgBytesPerSec = sh_a->channels * sh_a->samplerate * 2;
sh_a->wf->nBlockAlign = sh_a->wf->nAvgBytesPerSec;
if (!strcmp(track->codec_id, MKV_A_PCM_BE))
sh_a->format = mmioFOURCC('t', 'w', 'o', 's');
} else if (!strcmp(track->codec_id, MKV_A_QDMC)
|| !strcmp(track->codec_id, MKV_A_QDMC2)) {
sh_a->wf->nAvgBytesPerSec = 16000;
sh_a->wf->nBlockAlign = 1486;
track->fix_i_bps = 1;
track->qt_last_a_pts = 0.0;
goto copy_private_data;
} else if (track->a_formattag == mmioFOURCC('M', 'P', '4', 'A')) {
int profile, srate_idx;
sh_a->wf->nAvgBytesPerSec = 16000;
sh_a->wf->nBlockAlign = 1024;
if (!strcmp(track->codec_id, MKV_A_AAC) && track->private_data)
goto copy_private_data;
/* Recreate the 'private data' */
/* which faad2 uses in its initialization */
srate_idx = aac_get_sample_rate_index(sh_a->samplerate);
if (!strncmp(&track->codec_id[12], "MAIN", 4))
profile = 0;
else if (!strncmp(&track->codec_id[12], "LC", 2))
profile = 1;
else if (!strncmp(&track->codec_id[12], "SSR", 3))
profile = 2;
else
profile = 3;
sh_a->codecdata = malloc(5);
sh_a->codecdata[0] = ((profile + 1) << 3) | ((srate_idx & 0xE) >> 1);
sh_a->codecdata[1] =
((srate_idx & 0x1) << 7) | (track->a_channels << 3);
if (strstr(track->codec_id, "SBR") != NULL) {
/* HE-AAC (aka SBR AAC) */
sh_a->codecdata_len = 5;
sh_a->samplerate *= 2;
sh_a->wf->nSamplesPerSec *= 2;
srate_idx = aac_get_sample_rate_index(sh_a->samplerate);
sh_a->codecdata[2] = AAC_SYNC_EXTENSION_TYPE >> 3;
sh_a->codecdata[3] = ((AAC_SYNC_EXTENSION_TYPE & 0x07) << 5) | 5;
sh_a->codecdata[4] = (1 << 7) | (srate_idx << 3);
track->default_duration = 1024.0 / (sh_a->samplerate / 2);
} else {
sh_a->codecdata_len = 2;
track->default_duration = 1024.0 / sh_a->samplerate;
}
} else if (track->a_formattag == mmioFOURCC('v', 'r', 'b', 's')) {
/* VORBIS */
if (track->private_size == 0 || track->ms_compat && !sh_a->wf->cbSize)
goto error;
if (!track->ms_compat) {
sh_a->wf->cbSize = track->private_size;
sh_a->wf = realloc(sh_a->wf, sizeof(*sh_a->wf) + sh_a->wf->cbSize);
memcpy((unsigned char *) (sh_a->wf + 1), track->private_data,
sh_a->wf->cbSize);
}
} else if (!strncmp(track->codec_id, MKV_A_REALATRC, 7)) {
if (track->private_size < RAPROPERTIES4_SIZE)
goto error;
/* Common initialization for all RealAudio codecs */
unsigned char *src = track->private_data;
int codecdata_length, version;
int flavor;
sh_a->wf->nAvgBytesPerSec = 0; /* FIXME !? */
version = AV_RB16(src + 4);
flavor = AV_RB16(src + 22);
track->coded_framesize = AV_RB32(src + 24);
track->sub_packet_h = AV_RB16(src + 40);
sh_a->wf->nBlockAlign = track->audiopk_size = AV_RB16(src + 42);
track->sub_packet_size = AV_RB16(src + 44);
if (version == 4) {
src += RAPROPERTIES4_SIZE;
src += src[0] + 1;
src += src[0] + 1;
} else
src += RAPROPERTIES5_SIZE;
src += 3;
if (version == 5)
src++;
codecdata_length = AV_RB32(src);
src += 4;
sh_a->wf->cbSize = codecdata_length;
sh_a->wf = realloc(sh_a->wf, sizeof(*sh_a->wf) + sh_a->wf->cbSize);
memcpy(((char *) (sh_a->wf + 1)), src, codecdata_length);
switch (track->a_formattag) {
case mmioFOURCC('a', 't', 'r', 'c'):
sh_a->wf->nAvgBytesPerSec = atrc_fl2bps[flavor];
sh_a->wf->nBlockAlign = track->sub_packet_size;
goto audiobuf;
case mmioFOURCC('c', 'o', 'o', 'k'):
sh_a->wf->nAvgBytesPerSec = cook_fl2bps[flavor];
sh_a->wf->nBlockAlign = track->sub_packet_size;
goto audiobuf;
case mmioFOURCC('s', 'i', 'p', 'r'):
sh_a->wf->nAvgBytesPerSec = sipr_fl2bps[flavor];
sh_a->wf->nBlockAlign = track->coded_framesize;
goto audiobuf;
case mmioFOURCC('2', '8', '_', '8'):
sh_a->wf->nAvgBytesPerSec = 3600;
sh_a->wf->nBlockAlign = track->coded_framesize;
audiobuf:
track->audio_buf =
malloc(track->sub_packet_h * track->audiopk_size);
track->audio_timestamp =
malloc(track->sub_packet_h * sizeof(double));
break;
}
track->realmedia = 1;
} else if (!strcmp(track->codec_id, MKV_A_FLAC)
|| (track->a_formattag == 0xf1ac)) {
unsigned char *ptr;
int size;
free(sh_a->wf);
sh_a->wf = NULL;
if (!track->ms_compat) {
ptr = track->private_data;
size = track->private_size;
} else {
sh_a->format = mmioFOURCC('f', 'L', 'a', 'C');
ptr = track->private_data + sizeof(*sh_a->wf);
size = track->private_size - sizeof(*sh_a->wf);
}
if (size < 4 || ptr[0] != 'f' || ptr[1] != 'L' || ptr[2] != 'a'
|| ptr[3] != 'C') {
sh_a->codecdata = malloc(4);
sh_a->codecdata_len = 4;
memcpy(sh_a->codecdata, "fLaC", 4);
} else {
sh_a->codecdata = malloc(size);
sh_a->codecdata_len = size;
memcpy(sh_a->codecdata, ptr, size);
}
} else if (track->a_formattag == mmioFOURCC('W', 'V', 'P', 'K') ||
track->a_formattag == mmioFOURCC('T', 'R', 'H', 'D')) {
copy_private_data:
if (!track->ms_compat && track->private_size) {
sh_a->codecdata = malloc(track->private_size);
sh_a->codecdata_len = track->private_size;
memcpy(sh_a->codecdata, track->private_data, track->private_size);
}
} else if (track->a_formattag == mmioFOURCC('T', 'T', 'A', '1')) {
sh_a->codecdata_len = 30;
sh_a->codecdata = calloc(1, sh_a->codecdata_len);
if (!sh_a->codecdata)
goto error;
char *data = sh_a->codecdata;
memcpy(data + 0, "TTA1", 4);
AV_WL16(data + 4, 1);
AV_WL16(data + 6, sh_a->channels);
AV_WL16(data + 8, sh_a->wf->wBitsPerSample);
AV_WL32(data + 10, sh_a->samplerate);
// Bogus: last frame won't be played.
AV_WL32(data + 14, 0);
} else if (!track->ms_compat) {
goto error;
}
return 0;
error:
mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unknown/unsupported audio "
"codec ID '%s' for track %u or missing/faulty\n[mkv] "
"private codec data.\n", track->codec_id, track->tnum);
return 1;
}
static int demux_mkv_open_sub(demuxer_t *demuxer, mkv_track_t *track,
int sid)
{
if (track->subtitle_type) {
int size;
uint8_t *buffer;
sh_sub_t *sh = new_sh_sub(demuxer, sid);
sh->gsh->demuxer_id = track->tnum;
sh->demuxer_codecname = track->codec_id;
track->sh_sub = sh;
sh->type = track->subtitle_type;
size = track->private_size;
demux_mkv_decode(track, track->private_data, &buffer, &size, 2);
if (buffer && buffer != track->private_data) {
talloc_free(track->private_data);
talloc_steal(track, buffer);
track->private_data = buffer;
track->private_size = size;
}
sh->extradata = malloc(track->private_size);
memcpy(sh->extradata, track->private_data, track->private_size);
sh->extradata_len = track->private_size;
if (track->language && (strcmp(track->language, "und") != 0))
sh->lang = talloc_strdup(sh, track->language);
sh->gsh->title = talloc_strdup(sh, track->name);
sh->gsh->default_track = track->default_track;
} else {
mp_tmsg(MSGT_DEMUX, MSGL_ERR,
"[mkv] Subtitle type '%s' is not supported.\n",
track->codec_id);
return 1;
}
return 0;
}
static void mkv_free(struct demuxer *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
if (!mkv_d)
return;
for (int i = 0; i < mkv_d->num_tracks; i++)
demux_mkv_free_trackentry(mkv_d->tracks[i]);
free(mkv_d->indexes);
free(mkv_d->cluster_positions);
}
static int demux_mkv_open(demuxer_t *demuxer)
{
stream_t *s = demuxer->stream;
mkv_demuxer_t *mkv_d;
mkv_track_t *track;
stream_seek(s, s->start_pos);
if (ebml_read_id(s, NULL) != EBML_ID_EBML)
return 0;
struct ebml_ebml ebml_master = {};
struct ebml_parse_ctx parse_ctx = { .no_error_messages = true };
if (ebml_read_element(s, &parse_ctx, &ebml_master, &ebml_ebml_desc) < 0)
return 0;
if (ebml_master.doc_type.start == NULL) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] File has EBML header but no doctype."
" Assuming \"matroska\".\n");
} else if (bstrcmp(ebml_master.doc_type, bstr0("matroska")) != 0
&& bstrcmp(ebml_master.doc_type, bstr0("webm")) != 0) {
mp_msg(MSGT_DEMUX, MSGL_DBG2, "[mkv] no head found\n");
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
if (ebml_master.doc_type_read_version > 2) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] This looks like a Matroska file, "
"but we don't support format version %"PRIu64"\n",
ebml_master.doc_type_read_version);
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
if ((ebml_master.n_ebml_read_version
&& ebml_master.ebml_read_version != EBML_VERSION)
|| (ebml_master.n_ebml_max_size_length
&& ebml_master.ebml_max_size_length > 8)
|| (ebml_master.n_ebml_max_id_length
&& ebml_master.ebml_max_id_length != 4)) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] This looks like a Matroska file, "
"but the header has bad parameters\n");
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
talloc_free(parse_ctx.talloc_ctx);
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Found the head...\n");
if (ebml_read_id(s, NULL) != MATROSKA_ID_SEGMENT) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] but no segment :(\n");
return 0;
}
ebml_read_length(s, NULL); /* return bytes number until EOF */
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] + a segment...\n");
mkv_d = talloc_zero(demuxer, struct mkv_demuxer);
demuxer->priv = mkv_d;
mkv_d->tc_scale = 1000000;
mkv_d->segment_start = stream_tell(s);
while (1) {
uint32_t id = ebml_read_id(s, NULL);
if (s->eof) {
mp_tmsg(MSGT_DEMUX, MSGL_ERR, "[mkv] Unexpected end of file\n");
return 0;
}
if (id == MATROSKA_ID_CLUSTER) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ found cluster, headers are "
"parsed completely :)\n");
stream_seek(s, stream_tell(s) - 4);
break;
}
int res = read_header_element(demuxer, id, 0);
if (res <= -2)
return 0;
if (res < 0)
break;
}
display_create_tracks(demuxer);
/* select video track */
track = NULL;
if (demuxer->video->id == -1) { /* automatically select a video track */
/* search for a video track that has the 'default' flag set */
for (int i = 0; i < mkv_d->num_tracks; i++)
if (mkv_d->tracks[i]->type == MATROSKA_TRACK_VIDEO
&& mkv_d->tracks[i]->default_track) {
track = mkv_d->tracks[i];
break;
}
if (track == NULL)
/* no track has the 'default' flag set */
/* let's take the first video track */
for (int i = 0; i < mkv_d->num_tracks; i++)
if (mkv_d->tracks[i]->type == MATROSKA_TRACK_VIDEO
&& mkv_d->tracks[i]->id >= 0) {
track = mkv_d->tracks[i];
break;
}
} else if (demuxer->video->id != -2) /* -2 = no video at all */
track = find_track_by_num(mkv_d, demuxer->video->id,
MATROSKA_TRACK_VIDEO);
if (track && demuxer->v_streams[track->id]) {
mp_tmsg(MSGT_DEMUX, MSGL_V, "[mkv] Will play video track %u.\n",
track->tnum);
demuxer->video->id = track->id;
demuxer->video->sh = demuxer->v_streams[track->id];
} else {
mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[mkv] No video track found/wanted.\n");
demuxer->video->id = -2;
}
demuxer->audio->id = -2; // wait for higher-level code to select track
if (s->end_pos == 0)
demuxer->seekable = 0;
else {
demuxer->movi_start = s->start_pos;
demuxer->movi_end = s->end_pos;
demuxer->seekable = 1;
}
demuxer->accurate_seek = true;
return DEMUXER_TYPE_MATROSKA;
}
static int demux_mkv_read_block_lacing(uint8_t *buffer, uint64_t *size,
uint8_t *laces,
uint32_t **all_lace_sizes)
{
uint32_t total = 0;
uint32_t *lace_size = NULL;
uint8_t flags;
int i;
*all_lace_sizes = NULL;
/* lacing flags */
if (*size < 1)
goto error;
flags = *buffer++;
(*size)--;
switch ((flags & 0x06) >> 1) {
case 0: /* no lacing */
*laces = 1;
lace_size = calloc(*laces, sizeof(uint32_t));
lace_size[0] = *size;
break;
case 1: /* xiph lacing */
case 2: /* fixed-size lacing */
case 3: /* EBML lacing */
if (*size < 1)
goto error;
*laces = *buffer++;
(*size)--;
(*laces)++;
lace_size = calloc(*laces, sizeof(uint32_t));
switch ((flags & 0x06) >> 1) {
case 1: /* xiph lacing */
for (i = 0; i < *laces - 1; i++) {
lace_size[i] = 0;
do {
if (!*size)
goto error;
lace_size[i] += *buffer;
(*size)--;
} while (*buffer++ == 0xFF);
if (lace_size[i] > *size - total || total > *size)
goto error;
total += lace_size[i];
}
lace_size[i] = *size - total;
break;
case 2: /* fixed-size lacing */
for (i = 0; i < *laces; i++)
lace_size[i] = *size / *laces;
break;
case 3:; /* EBML lacing */
int l;
uint64_t num = ebml_read_vlen_uint(buffer, &l);
if (num == EBML_UINT_INVALID)
goto error;
buffer += l;
if (*size < l)
goto error;
*size -= l;
if (num > *size)
goto error;
total = lace_size[0] = num;
for (i = 1; i < *laces - 1; i++) {
int64_t snum = ebml_read_vlen_int(buffer, &l);
if (snum == EBML_INT_INVALID)
goto error;
buffer += l;
if (*size < l)
goto error;
*size -= l;
lace_size[i] = lace_size[i - 1] + snum;
if (lace_size[i] > *size - total || total > *size)
goto error;
total += lace_size[i];
}
lace_size[i] = *size - total;
break;
}
break;
}
*all_lace_sizes = lace_size;
return 0;
error:
free(lace_size);
mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Bad input [lacing]\n");
return 1;
}
#define SKIP_BITS(n) buffer<<=n
#define SHOW_BITS(n) ((buffer)>>(32-(n)))
static double real_fix_timestamp(unsigned char *buf, unsigned int timestamp, unsigned int format, int64_t *kf_base, int *kf_pts, double *pts){
double v_pts;
unsigned char *s = buf + 1 + (*buf+1)*8;
uint32_t buffer= (s[0]<<24) + (s[1]<<16) + (s[2]<<8) + s[3];
unsigned int kf=timestamp;
int pict_type;
if(format==mmioFOURCC('R','V','3','0') || format==mmioFOURCC('R','V','4','0')){
if(format==mmioFOURCC('R','V','3','0')){
SKIP_BITS(3);
pict_type= SHOW_BITS(2);
SKIP_BITS(2 + 7);
}else{
SKIP_BITS(1);
pict_type= SHOW_BITS(2);
SKIP_BITS(2 + 7 + 3);
}
kf= SHOW_BITS(13); // kf= 2*SHOW_BITS(12);
// if(pict_type==0)
if(pict_type<=1){
// I frame, sync timestamps:
*kf_base=(int64_t)timestamp-kf;
mp_msg(MSGT_DEMUX, MSGL_DBG2,"\nTS: base=%08"PRIX64"\n",*kf_base);
kf=timestamp;
} else {
// P/B frame, merge timestamps:
int64_t tmp=(int64_t)timestamp-*kf_base;
kf|=tmp&(~0x1fff); // combine with packet timestamp
if(kf<tmp-4096) kf+=8192; else // workaround wrap-around problems
if(kf>tmp+4096) kf-=8192;
kf+=*kf_base;
}
if(pict_type != 3){ // P || I frame -> swap timestamps
unsigned int tmp=kf;
kf=*kf_pts;
*kf_pts=tmp;
// if(kf<=tmp) kf=0;
}
}
v_pts=kf*0.001f;
// if(pts && (v_pts<*pts || !kf)) v_pts=*pts+frametime;
if(pts) *pts=v_pts;
return v_pts;
}
static void handle_realvideo(demuxer_t *demuxer, mkv_track_t *track,
uint8_t *buffer, uint32_t size, bool keyframe)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
demux_packet_t *dp;
uint32_t timestamp = mkv_d->last_pts * 1000;
dp = new_demux_packet(size);
memcpy(dp->buffer, buffer, size);
if (mkv_d->v_skip_to_keyframe) {
dp->pts = mkv_d->last_pts;
track->rv_kf_base = 0;
track->rv_kf_pts = timestamp;
} else
dp->pts =
real_fix_timestamp(dp->buffer, timestamp,
((sh_video_t *) demuxer->video->sh)->bih->
biCompression, &track->rv_kf_base,
&track->rv_kf_pts, NULL);
dp->pos = demuxer->filepos;
dp->keyframe = keyframe;
ds_add_packet(demuxer->video, dp);
}
static void handle_realaudio(demuxer_t *demuxer, mkv_track_t *track,
uint8_t *buffer, uint32_t size, bool keyframe)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
int sps = track->sub_packet_size;
int sph = track->sub_packet_h;
int cfs = track->coded_framesize;
int w = track->audiopk_size;
int spc = track->sub_packet_cnt;
demux_packet_t *dp;
int x;
if ((track->a_formattag == mmioFOURCC('2', '8', '_', '8'))
|| (track->a_formattag == mmioFOURCC('c', 'o', 'o', 'k'))
|| (track->a_formattag == mmioFOURCC('a', 't', 'r', 'c'))
|| (track->a_formattag == mmioFOURCC('s', 'i', 'p', 'r'))) {
// if(!block_bref)
// spc = track->sub_packet_cnt = 0;
switch (track->a_formattag) {
case mmioFOURCC('2', '8', '_', '8'):
for (x = 0; x < sph / 2; x++)
memcpy(track->audio_buf + x * 2 * w + spc * cfs,
buffer + cfs * x, cfs);
break;
case mmioFOURCC('c', 'o', 'o', 'k'):
case mmioFOURCC('a', 't', 'r', 'c'):
for (x = 0; x < w / sps; x++)
memcpy(track->audio_buf +
sps * (sph * x + ((sph + 1) / 2) * (spc & 1) +
(spc >> 1)), buffer + sps * x, sps);
break;
case mmioFOURCC('s', 'i', 'p', 'r'):
memcpy(track->audio_buf + spc * w, buffer, w);
if (spc == sph - 1) {
int n;
int bs = sph * w * 2 / 96; // nibbles per subpacket
// Perform reordering
for (n = 0; n < 38; n++) {
int j;
int i = bs * sipr_swaps[n][0];
int o = bs * sipr_swaps[n][1];
// swap nibbles of block 'i' with 'o' TODO: optimize
for (j = 0; j < bs; j++) {
int x = (i & 1) ?
(track->audio_buf[i >> 1] >> 4) :
(track->audio_buf[i >> 1] & 0x0F);
int y = (o & 1) ?
(track->audio_buf[o >> 1] >> 4) :
(track->audio_buf[o >> 1] & 0x0F);
if (o & 1)
track->audio_buf[o >> 1] =
(track->audio_buf[o >> 1] & 0x0F) | (x << 4);
else
track->audio_buf[o >> 1] =
(track->audio_buf[o >> 1] & 0xF0) | x;
if (i & 1)
track->audio_buf[i >> 1] =
(track->audio_buf[i >> 1] & 0x0F) | (y << 4);
else
track->audio_buf[i >> 1] =
(track->audio_buf[i >> 1] & 0xF0) | y;
++i;
++o;
}
}
}
break;
}
track->audio_timestamp[track->sub_packet_cnt] =
(track->ra_pts == mkv_d->last_pts) ? 0 : (mkv_d->last_pts);
track->ra_pts = mkv_d->last_pts;
if (track->sub_packet_cnt == 0)
track->audio_filepos = demuxer->filepos;
if (++(track->sub_packet_cnt) == sph) {
int apk_usize =
((sh_audio_t *) demuxer->audio->sh)->wf->nBlockAlign;
track->sub_packet_cnt = 0;
// Release all the audio packets
for (x = 0; x < sph * w / apk_usize; x++) {
dp = new_demux_packet(apk_usize);
memcpy(dp->buffer, track->audio_buf + x * apk_usize,
apk_usize);
/* Put timestamp only on packets that correspond to original
* audio packets in file */
dp->pts = (x * apk_usize % w) ? 0 :
track->audio_timestamp[x * apk_usize / w];
dp->pos = track->audio_filepos; // all equal
dp->keyframe = !x; // Mark first packet as keyframe
ds_add_packet(demuxer->audio, dp);
}
}
} else { // Not a codec that require reordering
dp = new_demux_packet(size);
memcpy(dp->buffer, buffer, size);
if (track->ra_pts == mkv_d->last_pts && !mkv_d->a_skip_to_keyframe)
dp->pts = 0;
else
dp->pts = mkv_d->last_pts;
track->ra_pts = mkv_d->last_pts;
dp->pos = demuxer->filepos;
dp->keyframe = keyframe;
ds_add_packet(demuxer->audio, dp);
}
}
static int handle_block(demuxer_t *demuxer, uint8_t *block, uint64_t length,
uint64_t block_duration, bool keyframe,
bool simpleblock)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
mkv_track_t *track = NULL;
demux_stream_t *ds = NULL;
uint64_t old_length;
uint64_t tc;
uint32_t *lace_size;
uint8_t laces, flags;
int i, num, tmp, use_this_block = 1;
double current_pts;
int16_t time;
/* first byte(s): track num */
num = ebml_read_vlen_uint(block, &tmp);
block += tmp;
/* time (relative to cluster time) */
time = block[0] << 8 | block[1];
block += 2;
length -= tmp + 2;
old_length = length;
flags = block[0];
if (simpleblock)
keyframe = flags & 0x80;
if (demux_mkv_read_block_lacing(block, &length, &laces, &lace_size))
return 0;
block += old_length - length;
tc = time * mkv_d->tc_scale + mkv_d->cluster_tc;
current_pts = tc / 1e9;
for (i = 0; i < mkv_d->num_tracks; i++)
if (mkv_d->tracks[i]->tnum == num) {
track = mkv_d->tracks[i];
break;
}
if (track == NULL) {
free(lace_size);
return 1;
}
if (track->type == MATROSKA_TRACK_AUDIO
&& track->id == demuxer->audio->id) {
ds = demuxer->audio;
if (mkv_d->a_skip_to_keyframe)
use_this_block = keyframe;
if (mkv_d->v_skip_to_keyframe)
use_this_block = 0;
if (track->fix_i_bps && use_this_block) {
sh_audio_t *sh = (sh_audio_t *) ds->sh;
if (block_duration != 0) {
sh->i_bps = length * 1e9 / block_duration;
track->fix_i_bps = 0;
} else if (track->qt_last_a_pts == 0.0)
track->qt_last_a_pts = current_pts;
else if (track->qt_last_a_pts != current_pts) {
sh->i_bps = length / (current_pts - track->qt_last_a_pts);
track->fix_i_bps = 0;
}
}
} else if (tc < mkv_d->skip_to_timecode)
use_this_block = 0;
else if (track->type == MATROSKA_TRACK_VIDEO
&& track->id == demuxer->video->id) {
ds = demuxer->video;
if (mkv_d->v_skip_to_keyframe)
use_this_block = keyframe;
} else if (track->type == MATROSKA_TRACK_SUBTITLE
&& track->id == demuxer->sub->id) {
ds = demuxer->sub;
if (laces > 1) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Subtitles use Matroska "
"lacing. This is abnormal and not supported.\n");
use_this_block = 0;
}
} else
use_this_block = 0;
if (use_this_block) {
mkv_d->last_pts = current_pts;
mkv_d->last_filepos = demuxer->filepos;
for (i = 0; i < laces; i++) {
if (ds == demuxer->video && track->realmedia)
handle_realvideo(demuxer, track, block, lace_size[i],
keyframe);
else if (ds == demuxer->audio && track->realmedia)
handle_realaudio(demuxer, track, block, lace_size[i],
keyframe);
else {
int size = lace_size[i];
demux_packet_t *dp;
uint8_t *buffer;
demux_mkv_decode(track, block, &buffer, &size, 1);
if (buffer) {
dp = new_demux_packet(size);
memcpy(dp->buffer, buffer, size);
if (buffer != block)
talloc_free(buffer);
dp->keyframe = keyframe;
/* If default_duration is 0, assume no pts value is known
* for packets after the first one (rather than all pts
* values being the same) */
if (i == 0 || track->default_duration)
dp->pts =
mkv_d->last_pts + i * track->default_duration;
dp->duration = block_duration / 1e9;
ds_add_packet(ds, dp);
}
}
block += lace_size[i];
}
if (ds == demuxer->video) {
mkv_d->v_skip_to_keyframe = 0;
mkv_d->skip_to_timecode = 0;
} else if (ds == demuxer->audio)
mkv_d->a_skip_to_keyframe = 0;
free(lace_size);
return 1;
}
free(lace_size);
return 0;
}
static int demux_mkv_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
uint64_t l;
int il, tmp;
while (1) {
while (mkv_d->cluster_size > 0) {
uint64_t block_duration = 0, block_length = 0;
bool keyframe = true;
uint8_t *block = NULL;
while (mkv_d->blockgroup_size > 0) {
switch (ebml_read_id(s, &il)) {
case MATROSKA_ID_BLOCKDURATION:
block_duration = ebml_read_uint(s, &l);
if (block_duration == EBML_UINT_INVALID) {
free(block);
return 0;
}
block_duration *= mkv_d->tc_scale;
break;
case MATROSKA_ID_BLOCK:
block_length = ebml_read_length(s, &tmp);
free(block);
if (block_length > 500000000)
return 0;
block = malloc(block_length + AV_LZO_INPUT_PADDING);
demuxer->filepos = stream_tell(s);
if (stream_read(s, block, block_length) !=
(int) block_length) {
free(block);
return 0;
}
l = tmp + block_length;
break;
case MATROSKA_ID_REFERENCEBLOCK:;
int64_t num = ebml_read_int(s, &l);
if (num == EBML_INT_INVALID) {
free(block);
return 0;
}
if (num)
keyframe = false;
break;
case EBML_ID_INVALID:
free(block);
return 0;
default:
ebml_read_skip(s, &l);
break;
}
mkv_d->blockgroup_size -= l + il;
mkv_d->cluster_size -= l + il;
}
if (block) {
int res = handle_block(demuxer, block, block_length,
block_duration, keyframe, false);
free(block);
if (res < 0)
return 0;
if (res)
return 1;
}
if (mkv_d->cluster_size > 0) {
switch (ebml_read_id(s, &il)) {
case MATROSKA_ID_TIMECODE:;
uint64_t num = ebml_read_uint(s, &l);
if (num == EBML_UINT_INVALID)
return 0;
mkv_d->cluster_tc = num * mkv_d->tc_scale;
add_cluster_position(mkv_d, mkv_d->cluster_start,
mkv_d->cluster_tc);
break;
case MATROSKA_ID_BLOCKGROUP:
mkv_d->blockgroup_size = ebml_read_length(s, &tmp);
l = tmp;
break;
case MATROSKA_ID_SIMPLEBLOCK:;
int res;
block_length = ebml_read_length(s, &tmp);
if (block_length > 500000000)
return 0;
block = malloc(block_length);
demuxer->filepos = stream_tell(s);
if (stream_read(s, block, block_length) !=
(int) block_length) {
free(block);
return 0;
}
l = tmp + block_length;
res = handle_block(demuxer, block, block_length,
block_duration, false, true);
free(block);
mkv_d->cluster_size -= l + il;
if (res < 0)
return 0;
else if (res)
return 1;
else
mkv_d->cluster_size += l + il;
break;
case EBML_ID_INVALID:
return 0;
default:
ebml_read_skip(s, &l);
break;
}
mkv_d->cluster_size -= l + il;
}
}
while (ebml_read_id(s, &il) != MATROSKA_ID_CLUSTER) {
ebml_read_skip(s, NULL);
if (s->eof)
return 0;
}
mkv_d->cluster_start = stream_tell(s) - il;
mkv_d->cluster_size = ebml_read_length(s, NULL);
}
return 0;
}
static int seek_creating_index(struct demuxer *demuxer, float rel_seek_secs,
int flags)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
struct stream *s = demuxer->stream;
int64_t target_tc_ns = (int64_t) (rel_seek_secs * 1e9);
if (target_tc_ns < 0)
target_tc_ns = 0;
uint64_t max_filepos = 0;
int64_t max_tc = -1;
int n = mkv_d->num_cluster_pos;
if (n > 0) {
max_filepos = mkv_d->cluster_positions[n - 1].filepos;
max_tc = mkv_d->cluster_positions[n - 1].timecode;
}
if (target_tc_ns > max_tc) {
if ((int64_t) max_filepos > stream_tell(s))
stream_seek(s, max_filepos);
else
stream_seek(s, stream_tell(s) + mkv_d->cluster_size);
/* parse all the clusters upto target_filepos */
while (!s->eof) {
uint64_t start = stream_tell(s);
uint32_t type = ebml_read_id(s, NULL);
uint64_t len = ebml_read_length(s, NULL);
uint64_t end = stream_tell(s) + len;
if (type == MATROSKA_ID_CLUSTER) {
while (!s->eof && stream_tell(s) < end) {
if (ebml_read_id(s, NULL) == MATROSKA_ID_TIMECODE) {
uint64_t tc = ebml_read_uint(s, NULL);
tc *= mkv_d->tc_scale;
add_cluster_position(mkv_d, start, tc);
if (tc >= target_tc_ns)
goto enough_index;
break;
}
}
}
if (s->eof)
break;
stream_seek(s, end);
}
enough_index:
if (s->eof)
stream_reset(s);
}
if (!mkv_d->num_cluster_pos) {
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] no target for seek found\n");
return -1;
}
uint64_t cluster_pos = mkv_d->cluster_positions[0].filepos;
/* Let's find the nearest cluster */
int64_t min_diff = 0xFFFFFFFFFFFFFFF;
for (int i = 0; i < mkv_d->num_cluster_pos; i++) {
int64_t diff = mkv_d->cluster_positions[i].timecode - target_tc_ns;
if (flags & SEEK_BACKWARD && diff < 0 && -diff < min_diff) {
cluster_pos = mkv_d->cluster_positions[i].filepos;
min_diff = -diff;
} else if (flags & SEEK_FORWARD
&& (diff < 0 ? -1 * diff : diff) < min_diff) {
cluster_pos = mkv_d->cluster_positions[i].filepos;
min_diff = diff < 0 ? -1 * diff : diff;
}
}
mkv_d->cluster_size = mkv_d->blockgroup_size = 0;
stream_seek(s, cluster_pos);
return 0;
}
static struct mkv_index *seek_with_cues(struct demuxer *demuxer, int seek_id,
int64_t target_timecode, int flags)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
struct mkv_index *index = NULL;
/* Find the entry in the index closest to the target timecode in the
* give direction. If there are no such entries - we're trying to seek
* backward from a target time before the first entry or forward from a
* target time after the last entry - then still seek to the first/last
* entry if that's further in the direction wanted than mkv_d->last_pts.
*/
int64_t min_diff = target_timecode - (int64_t)(mkv_d->last_pts * 1e9 + 0.5);
if (flags & SEEK_BACKWARD)
min_diff = -min_diff;
min_diff = FFMAX(min_diff, 1);
for (int i = 0; i < mkv_d->num_indexes; i++)
if (seek_id < 0 || mkv_d->indexes[i].tnum == seek_id) {
int64_t diff =
target_timecode -
(int64_t) (mkv_d->indexes[i].timecode * mkv_d->tc_scale);
if (flags & SEEK_BACKWARD)
diff = -diff;
if (diff <= 0) {
if (min_diff <= 0 && diff <= min_diff)
continue;
} else if (diff >= min_diff)
continue;
min_diff = diff;
index = mkv_d->indexes + i;
}
if (index) { /* We've found an entry. */
mkv_d->cluster_size = mkv_d->blockgroup_size = 0;
stream_seek(demuxer->stream, index->filepos);
}
return index;
}
static void demux_mkv_seek(demuxer_t *demuxer, float rel_seek_secs,
float audio_delay, int flags)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
uint64_t v_tnum = -1;
if (demuxer->video->id >= 0)
v_tnum = find_track_by_num(mkv_d, demuxer->video->id,
MATROSKA_TRACK_VIDEO)->tnum;
uint64_t a_tnum = -1;
if (demuxer->audio->id >= 0)
a_tnum = find_track_by_num(mkv_d, demuxer->audio->id,
MATROSKA_TRACK_AUDIO)->tnum;
if (!(flags & (SEEK_BACKWARD | SEEK_FORWARD))) {
if (flags & SEEK_ABSOLUTE || rel_seek_secs < 0)
flags |= SEEK_BACKWARD;
else
flags |= SEEK_FORWARD;
}
// Adjust the target a little bit to catch cases where the target position
// specifies a keyframe with high, but not perfect, precision.
rel_seek_secs += flags & SEEK_FORWARD ? -0.005 : 0.005;
if (!(flags & SEEK_FACTOR)) { /* time in secs */
mkv_index_t *index = NULL;
if (!(flags & SEEK_ABSOLUTE)) /* relative seek */
rel_seek_secs += mkv_d->last_pts;
rel_seek_secs = FFMAX(rel_seek_secs, 0);
int64_t target_timecode = rel_seek_secs * 1e9 + 0.5;
if (mkv_d->indexes == NULL) { /* no index was found */
if (seek_creating_index(demuxer, rel_seek_secs, flags) < 0)
return;
} else {
int seek_id = (demuxer->video->id < 0) ?
a_tnum : v_tnum;
index = seek_with_cues(demuxer, seek_id, target_timecode, flags);
if (!index)
index = seek_with_cues(demuxer, -1, target_timecode, flags);
}
if (demuxer->video->id >= 0)
mkv_d->v_skip_to_keyframe = 1;
if (flags & SEEK_FORWARD)
mkv_d->skip_to_timecode = target_timecode;
else
mkv_d->skip_to_timecode = index ? index->timecode * mkv_d->tc_scale
: 0;
mkv_d->a_skip_to_keyframe = 1;
demux_mkv_fill_buffer(demuxer, NULL);
} else if ((demuxer->movi_end <= 0) || !(flags & SEEK_ABSOLUTE))
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] seek unsupported flags\n");
else {
stream_t *s = demuxer->stream;
uint64_t target_filepos;
mkv_index_t *index = NULL;
int i;
if (mkv_d->indexes == NULL) { /* not implemented without index */
mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] seek unsupported flags\n");
return;
}
target_filepos = (uint64_t) (demuxer->movi_end * rel_seek_secs);
for (i = 0; i < mkv_d->num_indexes; i++)
if (mkv_d->indexes[i].tnum == v_tnum)
if ((index == NULL)
|| ((mkv_d->indexes[i].filepos >= target_filepos)
&& ((index->filepos < target_filepos)
|| (mkv_d->indexes[i].filepos < index->filepos))))
index = &mkv_d->indexes[i];
if (!index)
return;
mkv_d->cluster_size = mkv_d->blockgroup_size = 0;
stream_seek(s, index->filepos);
if (demuxer->video->id >= 0)
mkv_d->v_skip_to_keyframe = 1;
mkv_d->skip_to_timecode = index->timecode * mkv_d->tc_scale;
mkv_d->a_skip_to_keyframe = 1;
demux_mkv_fill_buffer(demuxer, NULL);
}
}
static int demux_mkv_control(demuxer_t *demuxer, int cmd, void *arg)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
switch (cmd) {
case DEMUXER_CTRL_CORRECT_PTS:
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_TIME_LENGTH:
if (mkv_d->duration == 0)
return DEMUXER_CTRL_DONTKNOW;
*((double *) arg) = (double) mkv_d->duration;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_GET_PERCENT_POS:
if (mkv_d->duration == 0) {
return DEMUXER_CTRL_DONTKNOW;
}
*((int *) arg) = (int) (100 * mkv_d->last_pts / mkv_d->duration);
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_SWITCH_AUDIO:;
int new_aid = *(int *) arg;
int current_aid = demuxer->audio->id;
if (current_aid < 0)
current_aid = -1;
if (new_aid == -1) { // cycle to next
new_aid = current_aid;
while (1) {
new_aid = (new_aid + 2) % (mkv_d->num_audio_tracks + 1) - 1;
if (new_aid == -1 || demuxer->a_streams[new_aid])
break;
}
}
if (new_aid < 0 || new_aid >= mkv_d->num_audio_tracks ||
!demuxer->a_streams[new_aid])
new_aid = -2;
*(int *) arg = new_aid;
if (current_aid != new_aid)
ds_free_packs(demuxer->audio);
demuxer->audio->id = new_aid;
return DEMUXER_CTRL_OK;
case DEMUXER_CTRL_SWITCH_VIDEO:;
int new_vid = *(int *) arg;
int current_vid = demuxer->video->id;
if (current_vid < 0)
current_vid = -1;
if (new_vid == -1) { // cycle to next
new_vid = current_vid;
while (1) {
new_vid = (new_vid + 2) % (mkv_d->num_video_tracks + 1) - 1;
if (new_vid == -1 || demuxer->v_streams[new_vid])
break;
}
}
if (new_vid < 0 || new_vid >= mkv_d->num_video_tracks ||
!demuxer->v_streams[new_vid])
new_vid = -2;
*(int *) arg = new_vid;
if (current_vid != new_vid)
ds_free_packs(demuxer->video);
demuxer->video->id = new_vid;
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
const demuxer_desc_t demuxer_desc_matroska = {
"Matroska demuxer",
"mkv",
"Matroska",
"Aurelien Jacobs",
"",
DEMUXER_TYPE_MATROSKA,
1, // safe autodetect
demux_mkv_open,
demux_mkv_fill_buffer,
NULL,
mkv_free,
demux_mkv_seek,
demux_mkv_control
};
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