/* * Matroska demuxer * Copyright (C) 2004 Aurelien Jacobs * 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 #include #include #include #include #include #include #include #include #include #include #include "config.h" #if HAVE_ZLIB #include #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; double codec_delay; 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, duration; uint64_t filepos; // position of the cluster which contains the packet } 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 a_skip_preroll; int subtitle_preroll; bool index_has_durations; } 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); if (entry->n_codec_delay) track->codec_delay = entry->codec_delay / 1e9; 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, uint64_t duration) { 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] = (mkv_index_t) { .tnum = track_id, .filepos = filepos, .timecode = timecode, .duration = duration, }; mkv_d->num_indexes++; } static void add_block_position(demuxer_t *demuxer, struct mkv_track *track, uint64_t filepos, uint64_t timecode, uint64_t duration) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; if (mkv_d->index_complete || !track) return; mkv_d->index_has_durations = true; if (track->last_index_entry != (size_t)-1) { mkv_index_t *index = &mkv_d->indexes[track->last_index_entry]; // Never add blocks which are already covered by the index. if (index->timecode >= timecode) return; } cue_index_add(demuxer, track->tnum, filepos, timecode, duration); 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; mkv_d->index_has_durations = false; 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, trackpos->cue_duration); mkv_d->index_has_durations |= trackpos->n_cue_duration > 0; MP_DBG(demuxer, "|+ found cue point for track %" PRIu64 ": timecode %" PRIu64 ", filepos: %" PRIu64 " offset %" PRIu64 ", duration %" PRIu64 "\n", trackpos->cue_track, time, pos, trackpos->cue_relative_position, trackpos->cue_duration); } } // 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 / 1e9, 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 = NULL; 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; bstr start = stream_peek(s, 4); uint32_t start_id; for (int n = 0; n < start.len; n++) start_id = (start_id << 8) | start.start[n]; if (start_id != EBML_ID_EBML) return -1; 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; mkv_d->a_skip_preroll = 1; 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, discardpadding; 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, block->duration / 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 - track->codec_delay; 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; dp->pos = mkv_d->last_filepos; /* 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; if (stream->type == STREAM_AUDIO) { unsigned int srate = track->a_sfreq; demux_packet_set_padding(dp, mkv_d->a_skip_preroll ? track->codec_delay * srate : 0, block_info->discardpadding / 1e9 * srate); mkv_d->a_skip_preroll = 0; } 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_DISCARDPADDING: block->discardpadding = ebml_read_uint(s); if (block->discardpadding == EBML_UINT_INVALID) goto error; 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) { // Find the cluster with the highest filepos, that has a timestamp // still lower than min_tc. double secs = demuxer->opts->mkv_subtitle_preroll_secs; uint64_t pre = MPMIN(INT64_MAX, secs * 1e9 / mkv_d->tc_scale); uint64_t min_tc = pre < index->timecode ? index->timecode - pre : 0; uint64_t prev_target = 0; uint64_t prev_tc = 0; for (size_t i = 0; i < mkv_d->num_indexes; i++) { if (seek_id < 0 || mkv_d->indexes[i].tnum == seek_id) { struct mkv_index *cur = &mkv_d->indexes[i]; if (cur->timecode <= min_tc && cur->timecode >= prev_tc) { prev_tc = cur->timecode; prev_target = cur->filepos; } } } if (mkv_d->index_has_durations) { // Find the earliest cluster that is not before prev_target, // but contains subtitle packets overlapping with the cluster // at seek_pos. uint64_t target = seek_pos; for (size_t i = 0; i < mkv_d->num_indexes; i++) { struct mkv_index *cur = &mkv_d->indexes[i]; if (cur->timecode <= index->timecode && cur->timecode + cur->duration > index->timecode && cur->filepos >= prev_target && cur->filepos < target) { target = cur->filepos; } } prev_target = target; } 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; // 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); 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; } } else { stream_t *s = demuxer->stream; read_deferred_cues(demuxer); int64_t size = 0; stream_control(s, STREAM_CTRL_GET_SIZE, &size); int64_t target_filepos = size * MPCLAMP(rel_seek_secs, 0, 1); mkv_index_t *index = NULL; if (mkv_d->index_complete) { 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]; } } } mkv_d->cluster_end = 0; if (index) { stream_seek(s, index->filepos); mkv_d->skip_to_timecode = index->timecode * mkv_d->tc_scale; } else { stream_seek(s, target_filepos); if (ebml_resync_cluster(mp_null_log, s) < 0) { // Assume EOF mkv_d->cluster_end = size; } } } mkv_d->v_skip_to_keyframe = st_active[STREAM_VIDEO]; mkv_d->a_skip_to_keyframe = st_active[STREAM_AUDIO]; mkv_d->a_skip_preroll = mkv_d->a_skip_to_keyframe; 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); }