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fdf40743bc
mpv/demux/demux_mkv.c
wm4 fdf40743bc demux_mkv: don't use default_duration for parsed packets 
Makes it behave slightly better for VP9. This is also the behavior
libavformat has.

Also while we're at it, don't set duration except for the first packet.
Normally we don't use the duration except for subtitles (which are never
parsed or "laced"), so this should make no observable difference.
2014-09-26 01:25:48 +02:00

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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 <inttypes.h>
#include <stdbool.h>
#include <assert.h>
#include <libavutil/common.h>
#include <libavutil/lzo.h>
#include <libavutil/intreadwrite.h>
#include <libavutil/avstring.h>
#include <libavcodec/avcodec.h>
#include <libavcodec/version.h>
#include "config.h"
#if HAVE_ZLIB
#include <zlib.h>
#endif
#include "talloc.h"
#include "common/av_common.h"
#include "options/options.h"
#include "misc/bstr.h"
#include "stream/stream.h"
#include "video/csputils.h"
#include "demux.h"
#include "stheader.h"
#include "ebml.h"
#include "matroska.h"
#include "codec_tags.h"
#include "video/img_fourcc.h"
#include "common/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
};
enum {
MAX_NUM_LACES = 256,
};
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;
struct sh_stream *stream;
char *codec_id;
int ms_compat;
char *language;
int type;
uint32_t v_width, v_height, v_dwidth, v_dheight;
bool v_dwidth_set, v_dheight_set;
double v_frate;
uint32_t colorspace;
int stereo_mode;
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;
bool parse;
void *parser_tmp;
AVCodecParserContext *av_parser;
AVCodecContext *av_parser_codec;
/* stuff for realmedia */
int realmedia;
int64_t rv_kf_base;
int rv_kf_pts;
double ra_pts; /* previous audio timestamp */
/** realaudio descrambling */
uint16_t sub_packet_size; ///< sub packet size, per stream
uint16_t sub_packet_h; ///< number of coded frames per block
uint32_t coded_framesize; ///< coded frame size, per stream
uint16_t audiopk_size; ///< audio packet size
unsigned char *audio_buf; ///< place to store reordered audio data
double *audio_timestamp; ///< timestamp for each audio packet
uint16_t sub_packet_cnt; ///< number of subpacket already received
int audio_filepos; ///< file position of first audio packet in block
/* generic content encoding support */
mkv_content_encoding_t *encodings;
int num_encodings;
/* latest added index entry for this track */
size_t last_index_entry;
} mkv_track_t;
typedef struct mkv_index {
int tnum;
uint64_t timecode, filepos;
} mkv_index_t;
typedef struct mkv_demuxer {
int64_t segment_start, segment_end;
double duration, last_pts;
uint64_t last_filepos;
mkv_track_t **tracks;
int num_tracks;
struct ebml_tags *tags;
uint64_t tc_scale, cluster_tc;
uint64_t cluster_start;
uint64_t cluster_end;
mkv_index_t *indexes;
size_t num_indexes;
bool index_complete;
uint64_t deferred_cues;
struct header_elem {
int32_t id;
int64_t pos;
bool parsed;
} *headers;
int num_headers;
uint64_t skip_to_timecode;
int v_skip_to_keyframe, a_skip_to_keyframe;
int subtitle_preroll;
} mkv_demuxer_t;
#define REALHEADER_SIZE 16
#define RVPROPERTIES_SIZE 34
#define RAPROPERTIES4_SIZE 56
#define RAPROPERTIES5_SIZE 70
// Maximum number of subtitle packets that are accepted for pre-roll.
// (Subtitle packets added before first A/V keyframe packet is found with seek.)
#define NUM_SUB_PREROLL_PACKETS 500
#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 bstr demux_mkv_decode(struct mp_log *log, mkv_track_t *track,
bstr data, uint32_t type)
{
uint8_t *src = data.start;
uint8_t *orig_src = src;
uint8_t *dest = src;
uint32_t size = data.len;
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 HAVE_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_warn(log, "zlib initialization failed.\n");
goto error;
}
zstream.next_in = (Bytef *) src;
zstream.avail_in = size;
dest = NULL;
zstream.avail_out = size;
int result;
do {
if (size >= INT_MAX - 4000) {
talloc_free(dest);
dest = NULL;
inflateEnd(&zstream);
goto error;
}
size += 4000;
dest = talloc_realloc_size(track->parser_tmp, 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_warn(log, "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 maxlen = INT_MAX - AV_LZO_OUTPUT_PADDING;
if (size >= maxlen / 3)
goto error;
int dstlen = size * 3;
dest = NULL;
while (1) {
int srclen = size;
dest = talloc_realloc_size(track->parser_tmp, 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_warn(log, "lzo decompression failed.\n");
talloc_free(dest);
dest = NULL;
goto error;
}
mp_dbg(log, "lzo decompression buffer too small.\n");
if (dstlen >= maxlen / 2) {
talloc_free(dest);
dest = NULL;
goto error;
}
dstlen *= 2;
}
size = dstlen - out_avail;
} else if (enc->comp_algo == 3) {
dest = talloc_size(track->parser_tmp, 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);
if (!size)
dest = NULL;
return (bstr){dest, size};
}
static int demux_mkv_read_info(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
stream_t *s = demuxer->stream;
int res = 0;
MP_VERBOSE(demuxer, "|+ segment information...\n");
mkv_d->tc_scale = 1000000;
mkv_d->duration = 0;
struct ebml_info info = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
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_VERBOSE(demuxer, "| + timecode scale: %" PRIu64 "\n", mkv_d->tc_scale);
}
if (info.n_duration) {
mkv_d->duration = info.duration * mkv_d->tc_scale / 1e9;
MP_VERBOSE(demuxer, "| + duration: %.3fs\n",
mkv_d->duration);
}
if (info.n_title) {
mp_tags_set_bstr(demuxer->metadata, bstr0("TITLE"), info.title);
}
if (info.n_segment_uid) {
int len = info.segment_uid.len;
if (len != sizeof(demuxer->matroska_data.uid.segment)) {
MP_INFO(demuxer, "segment uid invalid length %d\n", len);
} else {
memcpy(demuxer->matroska_data.uid.segment, info.segment_uid.start,
len);
MP_VERBOSE(demuxer, "| + segment uid");
for (int i = 0; i < len; i++)
MP_VERBOSE(demuxer, " %02x",
demuxer->matroska_data.uid.segment[i]);
MP_VERBOSE(demuxer, "\n");
}
}
if (demuxer->params && demuxer->params->matroska_wanted_uids) {
if (info.n_segment_uid) {
for (int i = 0; i < demuxer->params->matroska_num_wanted_uids; i++) {
struct matroska_segment_uid *uid = demuxer->params->matroska_wanted_uids + i;
if (!memcmp(info.segment_uid.start, uid->segment, 16)) {
demuxer->matroska_data.uid.edition = uid->edition;
goto out;
}
}
}
MP_INFO(demuxer, "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 = {0};
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_WARN(demuxer, "Track "
"number %u has been encrypted and "
"decryption has not yet been\n"
"implemented. Skipping track.\n",
track->tnum);
} else if (e.type != 0) {
MP_WARN(demuxer, "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_WARN(demuxer, "Track %u has been compressed with "
"an unknown/unsupported compression\n"
"algorithm (%" PRIu64 "). Skipping track.\n",
track->tnum, e.comp_algo);
}
#if !HAVE_ZLIB
else if (e.comp_algo == 0) {
MP_WARN(demuxer, "Track %u was compressed with zlib "
"but mpv has not been compiled\n"
"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(track, ce, mkv_content_encoding_t, n_enc + 1);
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_VERBOSE(demuxer, "| + 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_VERBOSE(demuxer, "| + 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_VERBOSE(demuxer, "| + Bit depth: %u\n", track->a_bps);
}
if (audio->n_channels) {
track->a_channels = audio->channels;
MP_VERBOSE(demuxer, "| + 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_VERBOSE(demuxer, "| + 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;
track->v_dwidth_set = true;
MP_VERBOSE(demuxer, "| + Display width: %u\n", track->v_dwidth);
}
if (video->n_display_height) {
track->v_dheight = video->display_height;
track->v_dheight_set = true;
MP_VERBOSE(demuxer, "| + Display height: %u\n", track->v_dheight);
}
if (video->n_pixel_width) {
track->v_width = video->pixel_width;
MP_VERBOSE(demuxer, "| + Pixel width: %u\n", track->v_width);
}
if (video->n_pixel_height) {
track->v_height = video->pixel_height;
MP_VERBOSE(demuxer, "| + Pixel height: %u\n", track->v_height);
}
if (video->n_colour_space && video->colour_space.len == 4) {
uint8_t *d = (uint8_t *)&video->colour_space.start[0];
track->colorspace = d[0] | (d[1] << 8) | (d[2] << 16) | (d[3] << 24);
MP_VERBOSE(demuxer, "| + Colorspace: %#x\n",
(unsigned int)track->colorspace);
}
if (video->n_stereo_mode) {
const char *name = MP_STEREO3D_NAME(video->stereo_mode);
if (name) {
track->stereo_mode = video->stereo_mode;
MP_VERBOSE(demuxer, "| + StereoMode: %s\n", name);
} else {
MP_WARN(demuxer, "Unknown StereoMode: %d\n", (int)video->stereo_mode);
}
}
}
/**
* \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)
{
talloc_free(track->parser_tmp);
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(NULL, struct mkv_track);
track->last_index_entry = (size_t)-1;
track->parser_tmp = talloc_new(track);
track->tnum = entry->track_number;
if (track->tnum) {
MP_VERBOSE(demuxer, "| + Track number: %u\n", track->tnum);
} else {
MP_ERR(demuxer, "Missing track number!\n");
}
if (entry->n_name) {
track->name = talloc_strndup(track, entry->name.start,
entry->name.len);
MP_VERBOSE(demuxer, "| + Name: %s\n", track->name);
}
track->type = entry->track_type;
MP_VERBOSE(demuxer, "| + Track type: ");
switch (track->type) {
case MATROSKA_TRACK_AUDIO:
MP_VERBOSE(demuxer, "Audio\n");
break;
case MATROSKA_TRACK_VIDEO:
MP_VERBOSE(demuxer, "Video\n");
break;
case MATROSKA_TRACK_SUBTITLE:
MP_VERBOSE(demuxer, "Subtitle\n");
break;
default:
MP_VERBOSE(demuxer, "unknown\n");
break;
}
if (entry->n_audio) {
MP_VERBOSE(demuxer, "| + Audio track\n");
parse_trackaudio(demuxer, track, &entry->audio);
}
if (entry->n_video) {
MP_VERBOSE(demuxer, "| + 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;
MP_VERBOSE(demuxer, "| + Codec ID: %s\n", track->codec_id);
} else {
MP_ERR(demuxer, "Missing codec ID!\n");
track->codec_id = "";
}
if (entry->n_codec_private && entry->codec_private.len <= 0x10000000) {
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_VERBOSE(demuxer, "| + CodecPrivate, length %u\n", track->private_size);
}
if (entry->n_language) {
track->language = talloc_strndup(track, entry->language.start,
entry->language.len);
MP_VERBOSE(demuxer, "| + Language: %s\n", track->language);
} else {
track->language = talloc_strdup(track, "eng");
}
if (entry->n_flag_default) {
track->default_track = entry->flag_default;
MP_VERBOSE(demuxer, "| + 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_VERBOSE(demuxer, "| + Default duration: 0");
} else {
if (!track->v_frate)
track->v_frate = 1e9 / entry->default_duration;
MP_VERBOSE(demuxer, "| + 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;
MP_VERBOSE(demuxer, "|+ segment tracks...\n");
struct ebml_tracks tracks = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
if (ebml_read_element(s, &parse_ctx, &tracks, &ebml_tracks_desc) < 0)
return -1;
mkv_d->tracks = talloc_zero_array(mkv_d, struct mkv_track*,
tracks.n_track_entry);
for (int i = 0; i < tracks.n_track_entry; i++) {
MP_VERBOSE(demuxer, "| + a track...\n");
parse_trackentry(demuxer, &tracks.track_entry[i]);
}
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
static void cue_index_add(demuxer_t *demuxer, int track_id, uint64_t filepos,
uint64_t timecode)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
MP_TARRAY_GROW(mkv_d, mkv_d->indexes, mkv_d->num_indexes);
mkv_d->indexes[mkv_d->num_indexes].tnum = track_id;
mkv_d->indexes[mkv_d->num_indexes].timecode = timecode;
mkv_d->indexes[mkv_d->num_indexes].filepos = filepos;
mkv_d->num_indexes++;
}
static void add_block_position(demuxer_t *demuxer, struct mkv_track *track,
uint64_t filepos, uint64_t timecode)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
if (mkv_d->index_complete || !track)
return;
if (track->last_index_entry != (size_t)-1) {
mkv_index_t *index = &mkv_d->indexes[track->last_index_entry];
// filepos is always the cluster position, which can contain multiple
// blocks with different timecodes - one is enough.
// Also, never add block which are already covered by the index.
if (index->filepos == filepos || index->timecode >= timecode)
return;
}
cue_index_add(demuxer, track->tnum, filepos, timecode);
track->last_index_entry = mkv_d->num_indexes - 1;
}
static int demux_mkv_read_cues(demuxer_t *demuxer)
{
struct MPOpts *opts = demuxer->opts;
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
mkv_d->deferred_cues = 0;
if (opts->index_mode != 1) {
ebml_read_skip(demuxer->log, -1, s);
return 0;
}
MP_VERBOSE(demuxer, "/---- [ parsing cues ] -----------\n");
struct ebml_cues cues = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
if (ebml_read_element(s, &parse_ctx, &cues, &ebml_cues_desc) < 0)
return -1;
mkv_d->num_indexes = 0;
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_WARN(demuxer, "Malformed CuePoint element\n");
continue;
}
uint64_t time = cuepoint->cue_time;
for (int c = 0; c < cuepoint->n_cue_track_positions; c++) {
struct ebml_cue_track_positions *trackpos =
&cuepoint->cue_track_positions[c];
uint64_t pos = mkv_d->segment_start + trackpos->cue_cluster_position;
cue_index_add(demuxer, trackpos->cue_track, pos, time);
MP_DBG(demuxer, "|+ found cue point for track %" PRIu64
": timecode %" PRIu64 ", filepos: %" PRIu64 "\n",
trackpos->cue_track, time, pos);
}
}
// Do not attempt to create index on the fly.
mkv_d->index_complete = true;
MP_VERBOSE(demuxer, "\\---- [ parsing cues ] -----------\n");
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
static void read_deferred_cues(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
stream_t *s = demuxer->stream;
if (mkv_d->deferred_cues) {
int64_t pos = mkv_d->deferred_cues;
mkv_d->deferred_cues = 0;
if (!stream_seek(s, pos)) {
MP_WARN(demuxer, "Failed to seek to cues\n");
return;
}
if (ebml_read_id(s) != MATROSKA_ID_CUES) {
MP_WARN(demuxer, "Expected element not found\n");
return;
}
demux_mkv_read_cues(demuxer);
}
}
static int demux_mkv_read_chapters(struct demuxer *demuxer)
{
struct MPOpts *opts = demuxer->opts;
stream_t *s = demuxer->stream;
int wanted_edition = opts->edition_id;
uint64_t wanted_edition_uid = demuxer->matroska_data.uid.edition;
/* A specific edition UID was requested; ignore the user option which is
* only applicable to the top-level file. */
if (wanted_edition_uid)
wanted_edition = -1;
MP_VERBOSE(demuxer, "/---- [ parsing chapters ] ---------\n");
struct ebml_chapters file_chapters = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
if (ebml_read_element(s, &parse_ctx, &file_chapters,
&ebml_chapters_desc) < 0)
return -1;
int selected_edition = -1;
int num_editions = file_chapters.n_edition_entry;
struct ebml_edition_entry *editions = file_chapters.edition_entry;
for (int i = 0; i < num_editions; i++) {
struct demux_edition new = {
.demuxer_id = editions[i].edition_uid,
.default_edition = editions[i].edition_flag_default,
.metadata = talloc_zero(demuxer, struct mp_tags),
};
MP_TARRAY_APPEND(demuxer, demuxer->editions, demuxer->num_editions, new);
}
if (wanted_edition >= 0 && wanted_edition < num_editions) {
selected_edition = wanted_edition;
MP_VERBOSE(demuxer, "User-specified edition: %d\n", selected_edition);
} else {
for (int i = 0; i < num_editions; i++) {
if (wanted_edition_uid &&
editions[i].edition_uid == wanted_edition_uid) {
selected_edition = i;
break;
} else if (editions[i].edition_flag_default) {
selected_edition = i;
MP_VERBOSE(demuxer, "Default edition: %d\n", i);
break;
}
}
}
if (selected_edition < 0) {
if (wanted_edition_uid) {
MP_ERR(demuxer, "Unable to find expected edition uid: %"PRIu64"\n",
wanted_edition_uid);
return -1;
} else {
selected_edition = 0;
}
}
for (int idx = 0; idx < num_editions; idx++) {
MP_VERBOSE(demuxer, "New edition %d\n", idx);
int warn_level = idx == selected_edition ? MSGL_WARN : MSGL_V;
if (editions[idx].n_edition_flag_default)
MP_VERBOSE(demuxer, "Default edition flag: %"PRIu64
"\n", editions[idx].edition_flag_default);
if (editions[idx].n_edition_flag_ordered)
MP_VERBOSE(demuxer, "Ordered chapter flag: %"PRIu64
"\n", editions[idx].edition_flag_ordered);
int chapter_count = editions[idx].n_chapter_atom;
struct matroska_chapter *m_chapters = NULL;
if (idx == selected_edition && editions[idx].edition_flag_ordered) {
m_chapters = talloc_array_ptrtype(demuxer, m_chapters, chapter_count);
demuxer->matroska_data.ordered_chapters = m_chapters;
demuxer->matroska_data.num_ordered_chapters = chapter_count;
}
for (int i = 0; i < chapter_count; i++) {
struct ebml_chapter_atom *ca = editions[idx].chapter_atom + i;
struct matroska_chapter chapter = {0};
struct bstr name = { "(unnamed)", 9 };
if (!ca->n_chapter_time_start)
MP_MSG(demuxer, warn_level, "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(demuxer, warn_level, "Multiple chapter "
"names not supported, picking first\n");
if (!ca->chapter_display[0].n_chap_string)
MP_MSG(demuxer, warn_level, "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.uid.segment))
MP_MSG(demuxer, warn_level,
"Chapter segment uid bad length %d\n", len);
else {
memcpy(chapter.uid.segment, ca->chapter_segment_uid.start,
len);
if (ca->n_chapter_segment_edition_uid)
chapter.uid.edition = ca->chapter_segment_edition_uid;
else
chapter.uid.edition = 0;
MP_VERBOSE(demuxer, "Chapter segment uid ");
for (int n = 0; n < len; n++)
MP_VERBOSE(demuxer, "%02x ",
chapter.uid.segment[n]);
MP_VERBOSE(demuxer, "\n");
}
}
MP_VERBOSE(demuxer, "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,
ca->chapter_uid);
}
if (m_chapters) {
chapter.name = talloc_strndup(m_chapters, name.start, name.len);
m_chapters[i] = chapter;
}
}
}
demuxer->num_editions = num_editions;
demuxer->edition = selected_edition;
talloc_free(parse_ctx.talloc_ctx);
MP_VERBOSE(demuxer, "\\---- [ parsing chapters ] ---------\n");
return 0;
}
static int demux_mkv_read_tags(demuxer_t *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
stream_t *s = demuxer->stream;
struct ebml_parse_ctx parse_ctx = {demuxer->log};
struct ebml_tags tags = {0};
if (ebml_read_element(s, &parse_ctx, &tags, &ebml_tags_desc) < 0)
return -1;
mkv_d->tags = talloc_memdup(mkv_d, &tags, sizeof(tags));
talloc_steal(mkv_d->tags, parse_ctx.talloc_ctx);
return 0;
}
static void process_tags(demuxer_t *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
struct ebml_tags *tags = mkv_d->tags;
if (!tags)
return;
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_attachment_uid)
continue;
struct mp_tags *dst = NULL;
if (tag.targets.target_chapter_uid) {
for (int n = 0; n < demuxer->num_chapters; n++) {
if (demuxer->chapters[n].demuxer_id ==
tag.targets.target_chapter_uid)
{
dst = demuxer->chapters[n].metadata;
break;
}
}
} else if (tag.targets.target_edition_uid) {
for (int n = 0; n < demuxer->num_editions; n++) {
if (demuxer->editions[n].demuxer_id ==
tag.targets.target_edition_uid)
{
dst = demuxer->editions[n].metadata;
break;
}
}
} else {
dst = demuxer->metadata;
}
if (dst) {
for (int j = 0; j < tag.n_simple_tag; j++) {
mp_tags_set_bstr(dst, tag.simple_tag[j].tag_name,
tag.simple_tag[j].tag_string);
}
}
}
}
static int demux_mkv_read_attachments(demuxer_t *demuxer)
{
stream_t *s = demuxer->stream;
MP_VERBOSE(demuxer, "/---- [ parsing attachments ] ---------\n");
struct ebml_attachments attachments = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
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_WARN(demuxer, "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_VERBOSE(demuxer, "Attachment: %.*s, %.*s, %zu bytes\n",
BSTR_P(name), BSTR_P(mime), attachment->file_data.len);
}
talloc_free(parse_ctx.talloc_ctx);
MP_VERBOSE(demuxer, "\\---- [ parsing attachments ] ---------\n");
return 0;
}
static int read_header_element(struct demuxer *demuxer, uint32_t id,
int64_t at_filepos);
static struct header_elem *get_header_element(struct demuxer *demuxer,
uint32_t id,
int64_t element_filepos)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
// Note that some files in fact contain a SEEKHEAD with a list of all
// clusters - we have no use for that.
if (!ebml_is_mkv_level1_id(id) || id == MATROSKA_ID_CLUSTER)
return NULL;
for (int n = 0; n < mkv_d->num_headers; n++) {
struct header_elem *elem = &mkv_d->headers[n];
// SEEKHEAD is the only element that can happen multiple times.
// Other elements might be duplicated (or attempted to be read twice,
// even if it's only once in the file), but only the first is used.
if (elem->id == id && (id != MATROSKA_ID_SEEKHEAD ||
elem->pos == element_filepos))
return elem;
}
struct header_elem elem = { .id = id, .pos = element_filepos };
MP_TARRAY_APPEND(mkv_d, mkv_d->headers, mkv_d->num_headers, elem);
return &mkv_d->headers[mkv_d->num_headers - 1];
}
// Mark the level 1 element with the given id as read. Return whether it
// was marked read before (e.g. for checking whether it was already read).
// element_filepos refers to the file position of the element ID.
static bool test_header_element(struct demuxer *demuxer, uint32_t id,
int64_t element_filepos)
{
struct header_elem *elem = get_header_element(demuxer, id, element_filepos);
if (!elem)
return false;
if (elem->parsed)
return true;
elem->parsed = true;
return false;
}
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 = {0};
struct ebml_parse_ctx parse_ctx = {demuxer->log};
MP_VERBOSE(demuxer, "/---- [ parsing seek head ] ---------\n");
if (ebml_read_element(s, &parse_ctx, &seekhead, &ebml_seek_head_desc) < 0) {
res = -1;
goto out;
}
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_WARN(demuxer, "Invalid SeekHead entry\n");
continue;
}
uint64_t pos = seek->seek_position + mkv_d->segment_start;
MP_VERBOSE(demuxer, "Element 0x%x at %"PRIu64".\n",
(unsigned)seek->seek_id, pos);
get_header_element(demuxer, seek->seek_id, pos);
// This is nice to warn against incomplete files.
int64_t end = 0;
stream_control(s, STREAM_CTRL_GET_SIZE, &end);
if (pos >= end)
MP_WARN(demuxer, "SeekHead position beyond "
"end of file - incomplete file?\n");
}
out:
MP_VERBOSE(demuxer, "\\---- [ parsing seek head ] ---------\n");
talloc_free(parse_ctx.talloc_ctx);
return res;
}
static int read_header_element(struct demuxer *demuxer, uint32_t id,
int64_t start_filepos)
{
if (id == EBML_ID_INVALID)
return 0;
if (test_header_element(demuxer, id, start_filepos))
goto skip;
switch(id) {
case MATROSKA_ID_INFO:
return demux_mkv_read_info(demuxer);
case MATROSKA_ID_TRACKS:
return demux_mkv_read_tracks(demuxer);
case MATROSKA_ID_CUES:
return demux_mkv_read_cues(demuxer);
case MATROSKA_ID_TAGS:
return demux_mkv_read_tags(demuxer);
case MATROSKA_ID_SEEKHEAD:
return demux_mkv_read_seekhead(demuxer);
case MATROSKA_ID_CHAPTERS:
return demux_mkv_read_chapters(demuxer);
case MATROSKA_ID_ATTACHMENTS:
return demux_mkv_read_attachments(demuxer);
}
skip:
ebml_read_skip(demuxer->log, -1, demuxer->stream);
return 0;
}
static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track);
static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track);
static int demux_mkv_open_sub(demuxer_t *demuxer, mkv_track_t *track);
static void display_create_tracks(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
for (int i = 0; i < mkv_d->num_tracks; i++) {
switch (mkv_d->tracks[i]->type) {
case MATROSKA_TRACK_VIDEO:
demux_mkv_open_video(demuxer, mkv_d->tracks[i]);
break;
case MATROSKA_TRACK_AUDIO:
demux_mkv_open_audio(demuxer, mkv_d->tracks[i]);
break;
case MATROSKA_TRACK_SUBTITLE:
demux_mkv_open_sub(demuxer, mkv_d->tracks[i]);
break;
}
}
}
typedef struct {
char *id;
int fourcc;
int extradata;
bool parse;
} videocodec_info_t;
static const videocodec_info_t vinfo[] = {
{MKV_V_MJPEG, MP_FOURCC('m', 'j', 'p', 'g'), 1},
{MKV_V_MPEG1, MP_FOURCC('m', 'p', 'g', '1'), 0},
{MKV_V_MPEG2, MP_FOURCC('m', 'p', 'g', '2'), 0},
{MKV_V_MPEG4_SP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_ASP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AVC, MP_FOURCC('a', 'v', 'c', '1'), 1},
{MKV_V_THEORA, MP_FOURCC('t', 'h', 'e', 'o'), 1},
{MKV_V_VP8, MP_FOURCC('V', 'P', '8', '0'), 0},
{MKV_V_VP9, MP_FOURCC('V', 'P', '9', '0'), 0, true},
{MKV_V_DIRAC, MP_FOURCC('d', 'r', 'a', 'c'), 0},
{MKV_V_PRORES, MP_FOURCC('p', 'r', '0', '0'), 0},
{MKV_V_HEVC, MP_FOURCC('H', 'E', 'V', 'C'), 1},
{0}
};
static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
{
unsigned char *extradata;
unsigned int extradata_size = 0;
bool raw = false;
struct sh_stream *sh = new_sh_stream(demuxer, STREAM_VIDEO);
if (!sh)
return 1;
track->stream = sh;
sh_video_t *sh_v = sh->video;
sh->demuxer_id = track->tnum;
sh->title = talloc_strdup(sh_v, track->name);
if (track->ms_compat) { /* MS compatibility mode */
// The private_data contains a BITMAPINFOHEADER struct
if (track->private_data == NULL || track->private_size < 40)
return 1;
unsigned char *h = track->private_data;
if (track->v_width == 0)
track->v_width = AV_RL32(h + 4); // biWidth
if (track->v_height == 0)
track->v_height = AV_RL32(h + 8); // biHeight
sh_v->bits_per_coded_sample = AV_RL16(h + 14); // biBitCount
sh->format = AV_RL32(h + 16); // biCompression
extradata = track->private_data + 40;
extradata_size = track->private_size - 40;
} else {
sh_v->bits_per_coded_sample = 24;
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 *src;
uint32_t type2;
unsigned int cnt;
src = (uint8_t *) track->private_data + RVPROPERTIES_SIZE;
cnt = track->private_size - RVPROPERTIES_SIZE;
type2 = AV_RB32(src - 4);
if (type2 == 0x10003000 || type2 == 0x10003001)
sh->format = MP_FOURCC('R', 'V', '1', '3');
else
sh->format = MP_FOURCC('R', 'V', track->codec_id[9], '0');
// copy type1 and type2 info from rv properties
extradata_size = cnt + 8;
extradata = src - 8;
track->realmedia = 1;
} else if (strcmp(track->codec_id, MKV_V_UNCOMPRESSED) == 0) {
// raw video, "like AVI" - this is a FourCC
sh->format = track->colorspace;
raw = true;
} else {
const videocodec_info_t *vi = vinfo;
while (vi->id && strcmp(vi->id, track->codec_id))
vi++;
sh->format = vi->fourcc;
if (vi->extradata && track->private_data
&& (track->private_size > 0)) {
extradata = track->private_data;
extradata_size = track->private_size;
}
track->parse = vi->parse;
if (!vi->id) {
MP_WARN(demuxer, "Unknown/unsupported "
"CodecID (%s) or missing/bad CodecPrivate\n"
"data (track %u).\n",
track->codec_id, track->tnum);
return 1;
}
}
}
if (extradata_size > 0x1000000) {
MP_WARN(demuxer, "Invalid CodecPrivate\n");
return 1;
}
sh_v->coded_width = track->v_width;
sh_v->coded_height = track->v_height;
sh_v->extradata = talloc_memdup(sh_v, extradata, extradata_size);
sh_v->extradata_len = extradata_size;
if (raw) {
sh->codec = "rawvideo";
} else {
mp_set_codec_from_tag(sh);
sh->format = mp_video_fourcc_alias(sh->format);
}
if (track->v_frate == 0.0)
track->v_frate = 25.0;
sh_v->fps = track->v_frate;
sh_v->aspect = 0;
if (!track->realmedia) {
sh_v->disp_w = track->v_width;
sh_v->disp_h = track->v_height;
uint32_t dw = track->v_dwidth_set ? track->v_dwidth : track->v_width;
uint32_t dh = track->v_dheight_set ? track->v_dheight : track->v_height;
if (dw && dh)
sh_v->aspect = (double) dw / dh;
} 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_VERBOSE(demuxer, "Aspect: %f\n", sh_v->aspect);
sh_v->avi_dts = track->ms_compat;
sh_v->stereo_mode = track->stereo_mode;
return 0;
}
static const struct mkv_audio_tag {
char *id; bool prefix; uint32_t formattag;
bool parse;
} mkv_audio_tags[] = {
{ MKV_A_MP2, 0, 0x0055 },
{ MKV_A_MP3, 0, 0x0055, true },
{ MKV_A_AC3, 1, 0x2000 },
{ MKV_A_EAC3, 1, MP_FOURCC('E', 'A', 'C', '3') },
{ MKV_A_DTS, 0, 0x2001 },
{ MKV_A_PCM, 0, 0x0001 },
{ MKV_A_PCM_BE, 0, 0x0001 },
{ MKV_A_PCM_FLT, 0, 0x0003 },
{ MKV_A_AAC_2MAIN, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_2LC, 1, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_2SSR, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4MAIN, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4LC, 1, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4SSR, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC_4LTP, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_AAC, 0, MP_FOURCC('M', 'P', '4', 'A') },
{ MKV_A_VORBIS, 0, MP_FOURCC('v', 'r', 'b', 's') },
{ MKV_A_OPUS, 0, MP_FOURCC('O', 'p', 'u', 's') },
{ MKV_A_OPUS_EXP, 0, MP_FOURCC('O', 'p', 'u', 's') },
{ MKV_A_QDMC, 0, MP_FOURCC('Q', 'D', 'M', 'C') },
{ MKV_A_QDMC2, 0, MP_FOURCC('Q', 'D', 'M', '2') },
{ MKV_A_WAVPACK, 0, MP_FOURCC('W', 'V', 'P', 'K') },
{ MKV_A_TRUEHD, 0, MP_FOURCC('T', 'R', 'H', 'D'), true },
{ MKV_A_FLAC, 0, MP_FOURCC('f', 'L', 'a', 'C') },
{ MKV_A_ALAC, 0, MP_FOURCC('a', 'L', 'a', 'C') },
{ MKV_A_REAL28, 0, MP_FOURCC('2', '8', '_', '8') },
{ MKV_A_REALATRC, 0, MP_FOURCC('a', 't', 'r', 'c') },
{ MKV_A_REALCOOK, 0, MP_FOURCC('c', 'o', 'o', 'k') },
{ MKV_A_REALDNET, 0, MP_FOURCC('d', 'n', 'e', 't') },
{ MKV_A_REALSIPR, 0, MP_FOURCC('s', 'i', 'p', 'r') },
{ MKV_A_TTA1, 0, MP_FOURCC('T', 'T', 'A', '1') },
{ NULL },
};
static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track)
{
struct sh_stream *sh = new_sh_stream(demuxer, STREAM_AUDIO);
if (!sh)
return 1;
track->stream = sh;
sh_audio_t *sh_a = sh->audio;
unsigned char *extradata = NULL;
int extradata_len = 0;
if (track->language && (strcmp(track->language, "und") != 0))
sh->lang = talloc_strdup(sh_a, track->language);
sh->demuxer_id = track->tnum;
sh->title = talloc_strdup(sh_a, track->name);
sh->default_track = track->default_track;
if (!track->a_osfreq)
track->a_osfreq = track->a_sfreq;
if (track->ms_compat) {
// The private_data contains a WAVEFORMATEX struct
if (track->private_size < 18)
goto error;
MP_VERBOSE(demuxer, "track with MS compat audio.\n");
unsigned char *h = track->private_data;
track->a_formattag = AV_RL16(h + 0); // wFormatTag
if (track->a_channels == 0)
track->a_channels = AV_RL16(h + 2); // nChannels
if (track->a_osfreq == 0.0)
track->a_osfreq = AV_RL32(h + 4); // nSamplesPerSec
sh_a->bitrate = AV_RL32(h + 8) * 8; // nAvgBytesPerSec
sh_a->block_align = AV_RL16(h + 12); // nBlockAlign
if (track->a_bps == 0)
track->a_bps = AV_RL16(h + 14); // wBitsPerSample
extradata = track->private_data + 18;
extradata_len = track->private_size - 18;
} else {
for (int i = 0; ; i++) {
const 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;
track->parse = t->parse;
break;
}
}
sh->format = track->a_formattag;
mp_chmap_set_unknown(&sh_a->channels, track->a_channels);
sh_a->samplerate = (uint32_t) track->a_osfreq;
if (track->a_bps == 0)
sh_a->bits_per_coded_sample = 16;
else
sh_a->bits_per_coded_sample = track->a_bps;
if (track->a_formattag == 0x0055) { /* MP3 || MP2 */
sh_a->bitrate = 16000 * 8;
sh_a->block_align = 1152;
} else if ((track->a_formattag == 0x2000) /* AC3 */
|| track->a_formattag == MP_FOURCC('E', 'A', 'C', '3')
|| (track->a_formattag == 0x2001)) { /* DTS */
sh_a->bits_per_coded_sample = 0;
sh_a->bitrate = 0;
sh_a->block_align = 0;
} else if (track->a_formattag == 0x0001) { /* PCM || PCM_BE */
if (!strcmp(track->codec_id, MKV_A_PCM_BE))
sh->format = MP_FOURCC('t', 'w', 'o', 's');
} else if (track->a_formattag == 0x0003) { /* PCM_FLT */
/* ok */
} else if (!strcmp(track->codec_id, MKV_A_QDMC)
|| !strcmp(track->codec_id, MKV_A_QDMC2)) {
sh_a->bitrate = 16000 * 8;
sh_a->block_align = 1486;
if (!extradata_len) {
extradata = track->private_data;
extradata_len = track->private_size;
}
} else if (track->a_formattag == MP_FOURCC('M', 'P', '4', 'A')) {
int profile, srate_idx;
sh_a->bitrate = 16000 * 8;
sh_a->block_align = 1024;
if (!strcmp(track->codec_id, MKV_A_AAC) && track->private_data) {
if (!extradata_len) {
extradata = track->private_data;
extradata_len = track->private_size;
}
} else {
/* Recreate the 'private data' */
/* which faad2 uses in its initialization */
srate_idx = aac_get_sample_rate_index(track->a_sfreq);
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 = talloc_size(sh_a, 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;
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 == MP_FOURCC('v', 'r', 'b', 's')) {
/* VORBIS */
if (track->private_size == 0 || (track->ms_compat && !extradata_len))
goto error;
if (!track->ms_compat) {
extradata = track->private_data;
extradata_len = track->private_size;
}
} else if (!strcmp(track->codec_id, MKV_A_OPUS)
|| !strcmp(track->codec_id, MKV_A_OPUS_EXP)) {
sh->format = MP_FOURCC('O', 'p', 'u', 's');
if (!track->ms_compat) {
extradata = track->private_data;
extradata_len = track->private_size;
}
} 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->bitrate = 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->block_align = 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;
}
if (track->audiopk_size == 0 || track->sub_packet_size == 0 ||
track->sub_packet_h == 0 || track->coded_framesize == 0)
goto error;
if (track->coded_framesize > 0x40000000)
goto error;
src += 3;
if (version == 5)
src++;
codecdata_length = AV_RB32(src);
if (codecdata_length < 0 || codecdata_length > 0x1000000)
goto error;
src += 4;
extradata_len = codecdata_length;
extradata = src;
switch (track->a_formattag) {
case MP_FOURCC('a', 't', 'r', 'c'):
sh_a->bitrate = atrc_fl2bps[flavor] * 8;
sh_a->block_align = track->sub_packet_size;
goto audiobuf;
case MP_FOURCC('c', 'o', 'o', 'k'):
sh_a->bitrate = cook_fl2bps[flavor] * 8;
sh_a->block_align = track->sub_packet_size;
goto audiobuf;
case MP_FOURCC('s', 'i', 'p', 'r'):
sh_a->bitrate = sipr_fl2bps[flavor] * 8;
sh_a->block_align = track->coded_framesize;
goto audiobuf;
case MP_FOURCC('2', '8', '_', '8'):
sh_a->bitrate = 3600 * 8;
sh_a->block_align = track->coded_framesize;
audiobuf:
track->audio_buf =
talloc_array_size(track, track->sub_packet_h, track->audiopk_size);
track->audio_timestamp =
talloc_array(track, double, track->sub_packet_h);
break;
}
track->realmedia = 1;
} else if (!strcmp(track->codec_id, MKV_A_FLAC)
|| (track->a_formattag == 0xf1ac)) {
unsigned char *ptr;
int size;
sh_a->bits_per_coded_sample = 0;
sh_a->bitrate = 0;
sh_a->block_align = 0;
if (!track->ms_compat) {
ptr = track->private_data;
size = track->private_size;
} else {
sh->format = MP_FOURCC('f', 'L', 'a', 'C');
ptr = extradata;
size = extradata_len;
}
if (size < 4 || ptr[0] != 'f' || ptr[1] != 'L' || ptr[2] != 'a'
|| ptr[3] != 'C') {
sh_a->codecdata = talloc_size(sh_a, 4);
sh_a->codecdata_len = 4;
memcpy(sh_a->codecdata, "fLaC", 4);
} else {
sh_a->codecdata = talloc_size(sh_a, size);
sh_a->codecdata_len = size;
memcpy(sh_a->codecdata, ptr, size);
}
} else if (!strcmp(track->codec_id, MKV_A_ALAC)) {
if (track->private_size && track->private_size < 10000000) {
sh_a->codecdata_len = track->private_size + 12;
sh_a->codecdata = talloc_size(sh_a, sh_a->codecdata_len);
char *data = sh_a->codecdata;
AV_WB32(data + 0, sh_a->codecdata_len);
memcpy(data + 4, "alac", 4);
AV_WB32(data + 8, 0);
memcpy(data + 12, track->private_data, track->private_size);
}
} else if (track->a_formattag == MP_FOURCC('W', 'V', 'P', 'K') ||
track->a_formattag == MP_FOURCC('T', 'R', 'H', 'D')) {
if (!track->ms_compat) {
extradata = track->private_data;
extradata_len = track->private_size;
}
} else if (track->a_formattag == MP_FOURCC('T', 'T', 'A', '1')) {
sh_a->codecdata_len = 30;
sh_a->codecdata = talloc_zero_size(sh_a, 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.num);
AV_WL16(data + 8, sh_a->bits_per_coded_sample);
AV_WL32(data + 10, track->a_osfreq);
// Bogus: last frame won't be played.
AV_WL32(data + 14, 0);
} else if (!track->ms_compat) {
goto error;
}
// Some files have broken default DefaultDuration set, which will lead to
// audio packets with incorrect timestamps. This follows FFmpeg commit
// 6158a3b, sample see FFmpeg ticket 2508.
if (sh_a->samplerate == 8000 && strcmp(track->codec_id, MKV_A_AC3) == 0)
track->default_duration = 0;
mp_set_codec_from_tag(sh);
if (track->private_size > 0x1000000 || extradata_len > 0x1000000)
goto error;
if (!sh_a->codecdata && extradata) {
sh_a->codecdata = talloc_memdup(sh_a, extradata, extradata_len);
sh_a->codecdata_len = extradata_len;
}
return 0;
error:
MP_WARN(demuxer, "Unknown/unsupported audio "
"codec ID '%s' for track %u or missing/faulty\n"
"private codec data.\n", track->codec_id, track->tnum);
return 1;
}
static const char *const mkv_sub_tag[][2] = {
{ MKV_S_VOBSUB, "dvd_subtitle" },
{ MKV_S_TEXTSSA, "ass"},
{ MKV_S_TEXTASS, "ass"},
{ MKV_S_SSA, "ass"},
{ MKV_S_ASS, "ass"},
{ MKV_S_TEXTASCII, "subrip"},
{ MKV_S_TEXTUTF8, "subrip"},
{ MKV_S_PGS, "hdmv_pgs_subtitle"},
{ MKV_S_WEBVTT_S, "webvtt-webm"},
{ MKV_S_WEBVTT_C, "webvtt-webm"},
{ MKV_S_DVB, "dvb_subtitle"},
{0}
};
static int demux_mkv_open_sub(demuxer_t *demuxer, mkv_track_t *track)
{
const char *subtitle_type = NULL;
for (int n = 0; mkv_sub_tag[n][0]; n++) {
if (strcmp(track->codec_id, mkv_sub_tag[n][0]) == 0) {
subtitle_type = mkv_sub_tag[n][1];
break;
}
}
if (track->private_size > 0x10000000)
return 1;
bstr in = (bstr){track->private_data, track->private_size};
struct sh_stream *sh = new_sh_stream(demuxer, STREAM_SUB);
if (!sh)
return 1;
track->stream = sh;
sh_sub_t *sh_s = sh->sub;
sh->demuxer_id = track->tnum;
sh->codec = subtitle_type;
bstr buffer = demux_mkv_decode(demuxer->log, track, in, 2);
if (buffer.start && buffer.start != track->private_data) {
talloc_free(track->private_data);
talloc_steal(track, buffer.start);
track->private_data = buffer.start;
track->private_size = buffer.len;
}
sh_s->extradata = talloc_size(sh, track->private_size);
memcpy(sh_s->extradata, track->private_data, track->private_size);
sh_s->extradata_len = track->private_size;
if (track->language && (strcmp(track->language, "und") != 0))
sh->lang = talloc_strdup(sh, track->language);
sh->title = talloc_strdup(sh, track->name);
sh->default_track = track->default_track;
if (!subtitle_type)
MP_ERR(demuxer, "Subtitle type '%s' is not supported.\n", track->codec_id);
return 0;
}
static int read_ebml_header(demuxer_t *demuxer)
{
stream_t *s = demuxer->stream;
if (ebml_read_id(s) != EBML_ID_EBML)
return 0;
struct ebml_ebml ebml_master = {{0}};
struct ebml_parse_ctx parse_ctx = { demuxer->log, .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_VERBOSE(demuxer, "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_DBG(demuxer, "no head found\n");
talloc_free(parse_ctx.talloc_ctx);
return 0;
}
if (ebml_master.doc_type_read_version > 2) {
MP_WARN(demuxer, "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_WARN(demuxer, "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);
return 1;
}
static int read_mkv_segment_header(demuxer_t *demuxer, int64_t *segment_end)
{
stream_t *s = demuxer->stream;
int num_skip = 0;
if (demuxer->params)
num_skip = demuxer->params->matroska_wanted_segment;
while (!s->eof) {
if (ebml_read_id(s) != MATROSKA_ID_SEGMENT) {
MP_VERBOSE(demuxer, "segment not found\n");
return 0;
}
MP_VERBOSE(demuxer, "+ a segment...\n");
uint64_t len = ebml_read_length(s);
*segment_end = (len == EBML_UINT_INVALID) ? 0 : stream_tell(s) + len;
if (num_skip <= 0)
return 1;
num_skip--;
MP_VERBOSE(demuxer, " (skipping)\n");
if (*segment_end <= 0)
break;
int64_t end = 0;
stream_control(s, STREAM_CTRL_GET_SIZE, &end);
if (*segment_end >= end)
return 0;
if (!stream_seek(s, *segment_end)) {
MP_WARN(demuxer, "Failed to seek in file\n");
return 0;
}
// Segments are like concatenated Matroska files
if (!read_ebml_header(demuxer))
return 0;
}
MP_VERBOSE(demuxer, "End of file, no further segments.\n");
return 0;
}
static int demux_mkv_open(demuxer_t *demuxer, enum demux_check check)
{
stream_t *s = demuxer->stream;
mkv_demuxer_t *mkv_d;
int64_t start_pos;
int64_t end_pos;
if (!read_ebml_header(demuxer))
return -1;
MP_VERBOSE(demuxer, "Found the head...\n");
if (!read_mkv_segment_header(demuxer, &end_pos))
return -1;
mkv_d = talloc_zero(demuxer, struct mkv_demuxer);
demuxer->priv = mkv_d;
mkv_d->tc_scale = 1000000;
mkv_d->segment_start = stream_tell(s);
mkv_d->segment_end = end_pos;
if (demuxer->params && demuxer->params->matroska_was_valid)
*demuxer->params->matroska_was_valid = true;
while (1) {
start_pos = stream_tell(s);
stream_peek(s, 4); // make sure we can always seek back
uint32_t id = ebml_read_id(s);
if (s->eof) {
MP_WARN(demuxer, "Unexpected end of file (no clusters found)\n");
break;
}
if (id == MATROSKA_ID_CLUSTER) {
MP_VERBOSE(demuxer, "|+ found cluster\n");
break;
}
int res = read_header_element(demuxer, id, start_pos);
if (res < 0)
return -1;
}
// Read headers that come after the first cluster (i.e. require seeking).
// Note: reading might increase ->num_headers.
// Likewise, ->headers might be reallocated.
for (int n = 0; n < mkv_d->num_headers; n++) {
struct header_elem *elem = &mkv_d->headers[n];
if (elem->parsed)
continue;
elem->parsed = true;
if (elem->id == MATROSKA_ID_CUES) {
// Read cues when they are needed, to avoid seeking on opening.
MP_VERBOSE(demuxer, "Deferring reading cues.\n");
mkv_d->deferred_cues = elem->pos;
continue;
}
MP_VERBOSE(demuxer, "Seeking to %"PRIu64" to read header element 0x%x.\n",
elem->pos, (unsigned)elem->id);
int64_t end = 0;
stream_control(s, STREAM_CTRL_GET_SIZE, &end);
if (elem->pos >= end) {
MP_WARN(demuxer, "SeekHead position beyond "
"end of file - incomplete file?\n");
continue;
}
if (!stream_seek(s, elem->pos)) {
MP_WARN(demuxer, "Failed to seek when reading header element.\n");
continue;
}
if (ebml_read_id(s) != elem->id) {
MP_ERR(demuxer, "Expected element 0x%x not found\n",
(unsigned int)elem->id);
continue;
}
elem->parsed = false; // don't make read_header_element skip it
int res = read_header_element(demuxer, elem->id, elem->pos);
if (res < 0)
return -1;
}
if (!stream_seek(s, start_pos)) {
MP_ERR(demuxer, "Couldn't seek back after reading headers?\n");
return -1;
}
MP_VERBOSE(demuxer, "All headers are parsed!\n");
process_tags(demuxer);
display_create_tracks(demuxer);
return 0;
}
static bool bstr_read_u8(bstr *buffer, uint8_t *out_u8)
{
if (buffer->len > 0) {
*out_u8 = buffer->start[0];
buffer->len -= 1;
buffer->start += 1;
return true;
} else {
return false;
}
}
static int demux_mkv_read_block_lacing(bstr *buffer, int *laces,
uint32_t lace_size[MAX_NUM_LACES])
{
uint32_t total = 0;
uint8_t flags, t;
int i;
/* lacing flags */
if (!bstr_read_u8(buffer, &flags))
goto error;
int type = (flags >> 1) & 0x03;
if (type == 0) { /* no lacing */
*laces = 1;
lace_size[0] = buffer->len;
} else {
if (!bstr_read_u8(buffer, &t))
goto error;
*laces = t + 1;
switch (type) {
case 1: /* xiph lacing */
for (i = 0; i < *laces - 1; i++) {
lace_size[i] = 0;
do {
if (!bstr_read_u8(buffer, &t))
goto error;
lace_size[i] += t;
} while (t == 0xFF);
total += lace_size[i];
}
lace_size[i] = buffer->len - total;
break;
case 2: /* fixed-size lacing */
for (i = 0; i < *laces; i++)
lace_size[i] = buffer->len / *laces;
break;
case 3:; /* EBML lacing */
uint64_t num = ebml_read_vlen_uint(buffer);
if (num == EBML_UINT_INVALID)
goto error;
if (num > buffer->len)
goto error;
total = lace_size[0] = num;
for (i = 1; i < *laces - 1; i++) {
int64_t snum = ebml_read_vlen_int(buffer);
if (snum == EBML_INT_INVALID)
goto error;
lace_size[i] = lace_size[i - 1] + snum;
total += lace_size[i];
}
lace_size[i] = buffer->len - total;
break;
default: abort();
}
}
total = buffer->len;
for (i = 0; i < *laces; i++) {
if (lace_size[i] > total)
goto error;
total -= lace_size[i];
}
if (total != 0)
goto error;
return 0;
error:
return 1;
}
static int64_t real_fix_timestamp(unsigned char *buf, int len, int64_t timestamp,
unsigned int format, int64_t *kf_base,
int *kf_pts)
{
if (format != MP_FOURCC('R', 'V', '3', '0') &&
format != MP_FOURCC('R', 'V', '4', '0'))
return timestamp;
if (len < 1) // invalid packet
return timestamp;
int offset = 1 + (buf[0] + 1) * 8;
if (offset + 4 > len) // invalid packet
return timestamp;
int hdr = AV_RB32(buf + offset);
int pict_type, pts;
if (format == MP_FOURCC('R', 'V', '3', '0')) {
pict_type = (hdr >> 27) & 3;
pts = (hdr >> 7) & 0x1FFF;
} else {
pict_type = (hdr >> 29) & 3;
pts = (hdr >> 6) & 0x1FFF;
}
if (pict_type != 3) {
*kf_base = timestamp;
*kf_pts = pts;
} else {
timestamp = *kf_base - ((*kf_pts - pts) & 0x1FFF);
}
return timestamp;
}
static void handle_realvideo(demuxer_t *demuxer, mkv_track_t *track,
bstr data, bool keyframe)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
demux_packet_t *dp;
int64_t timestamp = mkv_d->last_pts * 1000;
dp = new_demux_packet_from(data.start, data.len);
if (!dp)
return;
if (mkv_d->v_skip_to_keyframe) {
dp->pts = mkv_d->last_pts;
track->rv_kf_base = 0;
track->rv_kf_pts = 0;
} else {
dp->pts =
real_fix_timestamp(dp->buffer, dp->len, timestamp,
track->stream->format,
&track->rv_kf_base, &track->rv_kf_pts) * 0.001;
}
dp->pos = mkv_d->last_filepos;
dp->keyframe = keyframe;
demux_add_packet(track->stream, dp);
}
static void handle_realaudio(demuxer_t *demuxer, mkv_track_t *track,
bstr data, bool keyframe)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
uint16_t sps = track->sub_packet_size;
uint16_t sph = track->sub_packet_h;
uint32_t cfs = track->coded_framesize; // restricted to [1,0x40000000]
uint16_t w = track->audiopk_size;
uint16_t spc = track->sub_packet_cnt;
uint8_t *buffer = data.start;
uint32_t size = data.len;
demux_packet_t *dp;
// track->audio_buf allocation size
size_t audiobuf_size = sph * w;
if ((track->a_formattag == MP_FOURCC('2', '8', '_', '8'))
|| (track->a_formattag == MP_FOURCC('c', 'o', 'o', 'k'))
|| (track->a_formattag == MP_FOURCC('a', 't', 'r', 'c'))
|| (track->a_formattag == MP_FOURCC('s', 'i', 'p', 'r')))
{
switch (track->a_formattag) {
case MP_FOURCC('2', '8', '_', '8'):
for (int x = 0; x < sph / 2; x++) {
uint64_t dst_offset = x * 2 * w + spc * (uint64_t)cfs;
if (dst_offset + cfs > audiobuf_size)
goto error;
uint64_t src_offset = x * (uint64_t)cfs;
if (src_offset + cfs > size)
goto error;
memcpy(track->audio_buf + dst_offset, buffer + src_offset, cfs);
}
break;
case MP_FOURCC('c', 'o', 'o', 'k'):
case MP_FOURCC('a', 't', 'r', 'c'):
for (int x = 0; x < w / sps; x++) {
uint32_t dst_offset = sps * (sph * x + ((sph + 1) / 2) * (spc & 1)
+ (spc >> 1));
if (dst_offset + sps > audiobuf_size)
goto error;
uint32_t src_offset = sps * x;
if (src_offset + sps > size)
goto error;
memcpy(track->audio_buf + dst_offset, buffer + src_offset, sps);
}
break;
case MP_FOURCC('s', 'i', 'p', 'r'):
if (spc * w + w > audiobuf_size || w > size)
goto error;
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++) {
unsigned int i = bs * sipr_swaps[n][0]; // 77 max
unsigned int o = bs * sipr_swaps[n][1]; // 95 max
// swap nibbles of block 'i' with 'o'
for (int j = 0; j < bs; j++) {
if (i / 2 >= audiobuf_size || o / 2 >= audiobuf_size)
goto error;
int x = (i & 1) ?
(track->audio_buf[i / 2] >> 4) :
(track->audio_buf[i / 2] & 0x0F);
int y = (o & 1) ?
(track->audio_buf[o / 2] >> 4) :
(track->audio_buf[o / 2] & 0x0F);
if (o & 1)
track->audio_buf[o / 2] =
(track->audio_buf[o / 2] & 0x0F) | (x << 4);
else
track->audio_buf[o / 2] =
(track->audio_buf[o / 2] & 0xF0) | x;
if (i & 1)
track->audio_buf[i / 2] =
(track->audio_buf[i / 2] & 0x0F) | (y << 4);
else
track->audio_buf[i / 2] =
(track->audio_buf[i / 2] & 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 = mkv_d->last_filepos;
if (++(track->sub_packet_cnt) == sph) {
track->sub_packet_cnt = 0;
// apk_usize has same range as coded_framesize in worst case
uint32_t apk_usize = track->stream->audio->block_align;
if (apk_usize > audiobuf_size)
goto error;
// Release all the audio packets
for (int x = 0; x < sph * w / apk_usize; x++) {
dp = new_demux_packet_from(track->audio_buf + x * apk_usize,
apk_usize);
if (!dp)
goto error;
/* Put timestamp only on packets that correspond to original
* audio packets in file */
dp->pts = (x * apk_usize % w) ? MP_NOPTS_VALUE :
track->audio_timestamp[x * apk_usize / w];
dp->pos = track->audio_filepos; // all equal
dp->keyframe = !x; // Mark first packet as keyframe
demux_add_packet(track->stream, dp);
}
}
} else { // Not a codec that requires reordering
dp = new_demux_packet_from(buffer, size);
if (!dp)
goto error;
if (track->ra_pts == mkv_d->last_pts && !mkv_d->a_skip_to_keyframe)
dp->pts = MP_NOPTS_VALUE;
else
dp->pts = mkv_d->last_pts;
track->ra_pts = mkv_d->last_pts;
dp->pos = mkv_d->last_filepos;
dp->keyframe = keyframe;
demux_add_packet(track->stream, dp);
}
return;
error:
MP_ERR(demuxer, "RealAudio packet extraction or decryption error.\n");
}
static void mkv_seek_reset(demuxer_t *demuxer)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
for (int i = 0; i < mkv_d->num_tracks; i++) {
mkv_track_t *track = mkv_d->tracks[i];
if (track->av_parser)
av_parser_close(track->av_parser);
track->av_parser = NULL;
if (track->av_parser_codec) {
avcodec_close(track->av_parser_codec);
av_free(track->av_parser_codec);
}
track->av_parser_codec = NULL;
}
}
// Copied from libavformat/matroskadec.c (FFmpeg 310f9dd / 2013-05-30)
// Originally added with Libav commit 9b6f47c
// License: LGPL v2.1 or later
// Author header: The FFmpeg Project (this function still came from Libav)
// Modified to use talloc, removed ffmpeg/libav specific error codes.
static int libav_parse_wavpack(mkv_track_t *track, uint8_t *src,
uint8_t **pdst, int *size)
{
uint8_t *dst = NULL;
int dstlen = 0;
int srclen = *size;
uint32_t samples;
uint16_t ver;
int offset = 0;
if (srclen < 12 || track->private_size < 2)
return -1;
ver = AV_RL16(track->private_data);
samples = AV_RL32(src);
src += 4;
srclen -= 4;
while (srclen >= 8) {
int multiblock;
uint32_t blocksize;
uint8_t *tmp;
uint32_t flags = AV_RL32(src);
uint32_t crc = AV_RL32(src + 4);
src += 8;
srclen -= 8;
multiblock = (flags & 0x1800) != 0x1800;
if (multiblock) {
if (srclen < 4)
goto fail;
blocksize = AV_RL32(src);
src += 4;
srclen -= 4;
} else {
blocksize = srclen;
}
if (blocksize > srclen)
goto fail;
if (dstlen > 0x10000000 || blocksize > 0x10000000)
goto fail;
tmp = talloc_realloc(track->parser_tmp, dst, uint8_t,
dstlen + blocksize + 32);
if (!tmp)
goto fail;
dst = tmp;
dstlen += blocksize + 32;
AV_WL32(dst + offset, MKTAG('w', 'v', 'p', 'k')); // tag
AV_WL32(dst + offset + 4, blocksize + 24); // blocksize - 8
AV_WL16(dst + offset + 8, ver); // version
AV_WL16(dst + offset + 10, 0); // track/index_no
AV_WL32(dst + offset + 12, 0); // total samples
AV_WL32(dst + offset + 16, 0); // block index
AV_WL32(dst + offset + 20, samples); // number of samples
AV_WL32(dst + offset + 24, flags); // flags
AV_WL32(dst + offset + 28, crc); // crc
memcpy (dst + offset + 32, src, blocksize); // block data
src += blocksize;
srclen -= blocksize;
offset += blocksize + 32;
}
*pdst = dst;
*size = dstlen;
return 0;
fail:
talloc_free(dst);
return -1;
}
static bool mkv_parse_packet(mkv_track_t *track, bstr *raw, bstr *out)
{
if (track->a_formattag == MP_FOURCC('W', 'V', 'P', 'K')) {
int size = raw->len;
uint8_t *parsed;
if (libav_parse_wavpack(track, raw->start, &parsed, &size) >= 0) {
out->start = parsed;
out->len = size;
*raw = (bstr){0};
return true;
}
} else if (track->codec_id && strcmp(track->codec_id, MKV_V_PRORES) == 0) {
size_t newlen = raw->len + 8;
char *data = talloc_size(track->parser_tmp, newlen);
AV_WB32(data + 0, newlen);
AV_WB32(data + 4, MKBETAG('i', 'c', 'p', 'f'));
memcpy(data + 8, raw->start, raw->len);
out->start = data;
out->len = newlen;
*raw = (bstr){0};
return true;
} else if (track->parse) {
if (!track->av_parser) {
int id = mp_codec_to_av_codec_id(track->stream->codec);
const AVCodec *codec = avcodec_find_decoder(id);
track->av_parser = av_parser_init(id);
if (codec)
track->av_parser_codec = avcodec_alloc_context3(codec);
}
if (track->av_parser && track->av_parser_codec) {
while (raw->len) {
uint8_t *data;
int size;
int len = av_parser_parse2(track->av_parser, track->av_parser_codec,
&data, &size, raw->start, raw->len,
AV_NOPTS_VALUE, AV_NOPTS_VALUE, 0);
if (len < 0 || len > 0x10000000)
return false;
*raw = bstr_cut(*raw, len);
if (size) {
out->start = data;
out->len = size;
return true;
}
}
return false;
}
}
// No parsing
*out = *raw;
*raw = (bstr){0};
return true;
}
struct block_info {
uint64_t duration;
bool simple, keyframe;
uint64_t timecode;
mkv_track_t *track;
bstr data;
void *alloc;
int64_t filepos;
};
static void free_block(struct block_info *block)
{
free(block->alloc);
block->alloc = NULL;
block->data = (bstr){0};
}
static void index_block(demuxer_t *demuxer, struct block_info *block)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
if (block->keyframe) {
add_block_position(demuxer, block->track, mkv_d->cluster_start,
block->timecode / mkv_d->tc_scale);
}
}
static int read_block(demuxer_t *demuxer, int64_t end, struct block_info *block)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
uint64_t num;
int16_t time;
uint64_t length;
int res = -1;
free_block(block);
length = ebml_read_length(s);
if (length > 500000000 || stream_tell(s) + length > (uint64_t)end)
goto exit;
block->alloc = malloc(length + AV_LZO_INPUT_PADDING);
if (!block->alloc)
goto exit;
block->data = (bstr){block->alloc, length};
block->filepos = stream_tell(s);
if (stream_read(s, block->data.start, block->data.len) != block->data.len)
goto exit;
// Parse header of the Block element
/* first byte(s): track num */
num = ebml_read_vlen_uint(&block->data);
if (num == EBML_UINT_INVALID)
goto exit;
/* time (relative to cluster time) */
if (block->data.len < 3)
goto exit;
time = block->data.start[0] << 8 | block->data.start[1];
block->data.start += 2;
block->data.len -= 2;
if (block->simple)
block->keyframe = block->data.start[0] & 0x80;
block->timecode = time * mkv_d->tc_scale + mkv_d->cluster_tc;
for (int i = 0; i < mkv_d->num_tracks; i++) {
if (mkv_d->tracks[i]->tnum == num) {
block->track = mkv_d->tracks[i];
break;
}
}
if (!block->track) {
res = 0;
goto exit;
}
res = 1;
exit:
if (res <= 0)
free_block(block);
return res;
}
static int handle_block(demuxer_t *demuxer, struct block_info *block_info)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
int laces;
double current_pts;
bstr data = block_info->data;
bool keyframe = block_info->keyframe;
uint64_t block_duration = block_info->duration;
uint64_t tc = block_info->timecode;
mkv_track_t *track = block_info->track;
struct sh_stream *stream = track->stream;
uint32_t lace_size[MAX_NUM_LACES];
bool use_this_block = tc >= mkv_d->skip_to_timecode;
if (!demux_stream_is_selected(stream))
return 0;
if (demux_mkv_read_block_lacing(&data, &laces, lace_size)) {
MP_ERR(demuxer, "Bad input [lacing]\n");
return 0;
}
current_pts = tc / 1e9;
if (track->type == MATROSKA_TRACK_AUDIO) {
if (mkv_d->a_skip_to_keyframe)
use_this_block &= keyframe;
} else if (track->type == MATROSKA_TRACK_SUBTITLE) {
if (!use_this_block && mkv_d->subtitle_preroll)
use_this_block = 1;
if (use_this_block) {
if (mkv_d->subtitle_preroll) {
mkv_d->subtitle_preroll--;
} else {
// This could overflow the demuxer queue.
if (mkv_d->a_skip_to_keyframe || mkv_d->v_skip_to_keyframe)
use_this_block = 0;
}
}
if (use_this_block) {
if (laces > 1) {
MP_WARN(demuxer, "Subtitles use Matroska "
"lacing. This is abnormal and not supported.\n");
use_this_block = 0;
}
}
} else if (track->type == MATROSKA_TRACK_VIDEO) {
if (mkv_d->v_skip_to_keyframe)
use_this_block &= keyframe;
}
if (use_this_block) {
mkv_d->last_pts = current_pts;
mkv_d->last_filepos = block_info->filepos;
int p = 0;
for (int i = 0; i < laces; i++) {
bstr block = bstr_splice(data, 0, lace_size[i]);
if (stream->type == STREAM_VIDEO && track->realmedia)
handle_realvideo(demuxer, track, block, keyframe);
else if (stream->type == STREAM_AUDIO && track->realmedia)
handle_realaudio(demuxer, track, block, keyframe);
else {
bstr raw = demux_mkv_decode(demuxer->log, track, block, 1);
bstr buffer;
while (raw.start && mkv_parse_packet(track, &raw, &buffer)) {
demux_packet_t *dp =
new_demux_packet_from(buffer.start, buffer.len);
if (!dp)
break;
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). Also, don't use it for extra
* packets resulting from parsing. */
if (p == 0 || (p == i && track->default_duration))
dp->pts = mkv_d->last_pts + p * track->default_duration;
if (track->ms_compat)
MPSWAP(double, dp->pts, dp->dts);
if (p == 0)
dp->duration = block_duration / 1e9;
demux_add_packet(stream, dp);
p++;
}
talloc_free_children(track->parser_tmp);
}
data = bstr_cut(data, lace_size[i]);
}
if (stream->type == STREAM_VIDEO) {
mkv_d->v_skip_to_keyframe = 0;
mkv_d->skip_to_timecode = 0;
mkv_d->subtitle_preroll = 0;
} else if (stream->type == STREAM_AUDIO) {
mkv_d->a_skip_to_keyframe = 0;
}
return 1;
}
return 0;
}
static int read_block_group(demuxer_t *demuxer, int64_t end,
struct block_info *block)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
*block = (struct block_info){ .keyframe = true };
while (stream_tell(s) < end) {
switch (ebml_read_id(s)) {
case MATROSKA_ID_BLOCKDURATION:
block->duration = ebml_read_uint(s);
if (block->duration == EBML_UINT_INVALID)
goto error;
block->duration *= mkv_d->tc_scale;
break;
case MATROSKA_ID_BLOCK:
if (read_block(demuxer, end, block) < 0)
goto error;
break;
case MATROSKA_ID_REFERENCEBLOCK:;
int64_t num = ebml_read_int(s);
if (num == EBML_INT_INVALID)
goto error;
if (num)
block->keyframe = false;
break;
case MATROSKA_ID_CLUSTER:
case EBML_ID_INVALID:
goto error;
default:
if (ebml_read_skip(demuxer->log, end, s) != 0)
goto error;
break;
}
}
return block->data.start ? 1 : 0;
error:
free_block(block);
return -1;
}
static int read_next_block(demuxer_t *demuxer, struct block_info *block)
{
mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
stream_t *s = demuxer->stream;
while (1) {
while (stream_tell(s) < mkv_d->cluster_end) {
int64_t start_filepos = stream_tell(s);
switch (ebml_read_id(s)) {
case MATROSKA_ID_TIMECODE: {
uint64_t num = ebml_read_uint(s);
if (num == EBML_UINT_INVALID)
goto find_next_cluster;
mkv_d->cluster_tc = num * mkv_d->tc_scale;
break;
}
case MATROSKA_ID_BLOCKGROUP: {
int64_t end = ebml_read_length(s);
end += stream_tell(s);
if (end > mkv_d->cluster_end)
goto find_next_cluster;
int res = read_block_group(demuxer, end, block);
if (res < 0)
goto find_next_cluster;
if (res > 0)
return 1;
break;
}
case MATROSKA_ID_SIMPLEBLOCK: {
*block = (struct block_info){ .simple = true };
int res = read_block(demuxer, mkv_d->cluster_end, block);
if (res < 0)
goto find_next_cluster;
if (res > 0)
return 1;
break;
}
case MATROSKA_ID_CLUSTER:
mkv_d->cluster_start = start_filepos;
goto next_cluster;
case EBML_ID_INVALID:
goto find_next_cluster;
default: ;
if (ebml_read_skip(demuxer->log, mkv_d->cluster_end, s) != 0)
goto find_next_cluster;
break;
}
}
find_next_cluster:
mkv_d->cluster_end = 0;
for (;;) {
mkv_d->cluster_start = stream_tell(s);
uint32_t id = ebml_read_id(s);
if (id == MATROSKA_ID_CLUSTER)
break;
if (s->eof)
return -1;
if (id == EBML_ID_EBML && stream_tell(s) >= mkv_d->segment_end) {
// Appended segment - don't use its clusters, consider this EOF.
stream_seek(s, stream_tell(s) - 4);
return -1;
}
// For the sake of robustness, consider even unknown level 1
// elements the same as unknown/broken IDs.
if (!ebml_is_mkv_level1_id(id) ||
ebml_read_skip(demuxer->log, -1, s) != 0)
{
ebml_resync_cluster(demuxer->log, s);
}
}
next_cluster:
mkv_d->cluster_end = ebml_read_length(s);
// mkv files for "streaming" can have this legally
if (mkv_d->cluster_end != EBML_UINT_INVALID)
mkv_d->cluster_end += stream_tell(s);
}
}
static int demux_mkv_fill_buffer(demuxer_t *demuxer)
{
for (;;) {
int res;
struct block_info block;
res = read_next_block(demuxer, &block);
if (res < 0)
return 0;
if (res > 0) {
index_block(demuxer, &block);
res = handle_block(demuxer, &block);
free_block(&block);
if (res > 0)
return 1;
}
}
}
static mkv_index_t *get_highest_index_entry(struct demuxer *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
assert(!mkv_d->index_complete); // would require separate code
mkv_index_t *index = NULL;
for (int n = 0; n < mkv_d->num_tracks; n++) {
int n_index = mkv_d->tracks[n]->last_index_entry;
if (n_index >= 0) {
mkv_index_t *index2 = &mkv_d->indexes[n_index];
if (!index || index2->filepos > index->filepos)
index = index2;
}
}
return index;
}
static int create_index_until(struct demuxer *demuxer, uint64_t timecode)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
struct stream *s = demuxer->stream;
read_deferred_cues(demuxer);
if (mkv_d->index_complete)
return 0;
mkv_index_t *index = get_highest_index_entry(demuxer);
if (!index || index->timecode * mkv_d->tc_scale < timecode) {
if (index)
stream_seek(s, index->filepos);
MP_VERBOSE(demuxer, "creating index until TC %" PRIu64 "\n", timecode);
for (;;) {
int res;
struct block_info block;
res = read_next_block(demuxer, &block);
if (res < 0)
break;
if (res > 0) {
index_block(demuxer, &block);
free_block(&block);
}
index = get_highest_index_entry(demuxer);
if (index && index->timecode * mkv_d->tc_scale >= timecode)
break;
}
}
if (!mkv_d->indexes) {
MP_WARN(demuxer, "no target for seek found\n");
return -1;
}
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 (size_t 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. */
uint64_t seek_pos = index->filepos;
if (flags & SEEK_SUBPREROLL) {
uint64_t prev_target = 0;
for (size_t i = 0; i < mkv_d->num_indexes; i++) {
if (seek_id < 0 || mkv_d->indexes[i].tnum == seek_id) {
uint64_t index_pos = mkv_d->indexes[i].filepos;
if (index_pos > prev_target && index_pos < seek_pos)
prev_target = index_pos;
}
}
if (prev_target)
seek_pos = prev_target;
}
mkv_d->cluster_end = 0;
stream_seek(demuxer->stream, seek_pos);
}
return index;
}
static void demux_mkv_seek(demuxer_t *demuxer, double rel_seek_secs, int flags)
{
mkv_demuxer_t *mkv_d = demuxer->priv;
int64_t old_pos = stream_tell(demuxer->stream);
uint64_t v_tnum = -1;
uint64_t a_tnum = -1;
bool st_active[STREAM_TYPE_COUNT] = {0};
mkv_seek_reset(demuxer);
for (int i = 0; i < mkv_d->num_tracks; i++) {
mkv_track_t *track = mkv_d->tracks[i];
if (demux_stream_is_selected(track->stream)) {
st_active[track->stream->type] = true;
if (track->type == MATROSKA_TRACK_VIDEO)
v_tnum = track->tnum;
if (track->type == MATROSKA_TRACK_AUDIO)
a_tnum = track->tnum;
}
}
mkv_d->subtitle_preroll = NUM_SUB_PREROLL_PACKETS;
if (!st_active[STREAM_SUB] || !st_active[STREAM_VIDEO])
flags &= ~SEEK_SUBPREROLL;
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 (create_index_until(demuxer, target_timecode) >= 0) {
int seek_id = st_active[STREAM_VIDEO] ? v_tnum : a_tnum;
index = seek_with_cues(demuxer, seek_id, target_timecode, flags);
if (!index)
index = seek_with_cues(demuxer, -1, target_timecode, flags);
}
if (!index)
stream_seek(demuxer->stream, old_pos);
mkv_d->v_skip_to_keyframe = st_active[STREAM_VIDEO];
mkv_d->a_skip_to_keyframe = st_active[STREAM_AUDIO];
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;
}
demux_mkv_fill_buffer(demuxer);
} else if (!(flags & SEEK_ABSOLUTE))
MP_VERBOSE(demuxer, "seek unsupported flags\n");
else {
stream_t *s = demuxer->stream;
uint64_t target_filepos;
mkv_index_t *index = NULL;
read_deferred_cues(demuxer);
if (!mkv_d->index_complete) { /* not implemented without index */
MP_VERBOSE(demuxer, "seek unsupported flags\n");
stream_seek(s, old_pos);
return;
}
int64_t size = 0;
stream_control(s, STREAM_CTRL_GET_SIZE, &size);
target_filepos = (uint64_t) (size * rel_seek_secs);
for (size_t 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) {
stream_seek(s, old_pos);
return;
}
mkv_d->cluster_end = 0;
stream_seek(s, index->filepos);
mkv_d->v_skip_to_keyframe = st_active[STREAM_VIDEO];
mkv_d->a_skip_to_keyframe = st_active[STREAM_AUDIO];
mkv_d->skip_to_timecode = index->timecode * mkv_d->tc_scale;
demux_mkv_fill_buffer(demuxer);
}
}
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_GET_TIME_LENGTH:
if (mkv_d->duration == 0)
return DEMUXER_CTRL_DONTKNOW;
*((double *) arg) = (double) mkv_d->duration;
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
static void mkv_free(struct demuxer *demuxer)
{
struct mkv_demuxer *mkv_d = demuxer->priv;
if (!mkv_d)
return;
mkv_seek_reset(demuxer);
for (int i = 0; i < mkv_d->num_tracks; i++)
demux_mkv_free_trackentry(mkv_d->tracks[i]);
}
const demuxer_desc_t demuxer_desc_matroska = {
.name = "mkv",
.desc = "Matroska",
.type = DEMUXER_TYPE_MATROSKA,
.open = demux_mkv_open,
.fill_buffer = demux_mkv_fill_buffer,
.close = mkv_free,
.seek = demux_mkv_seek,
.control = demux_mkv_control
};
bool demux_matroska_uid_cmp(struct matroska_segment_uid *a,
struct matroska_segment_uid *b)
{
return (!memcmp(a->segment, b->segment, 16) &&
a->edition == b->edition);
}
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