/* * 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 "config.h" #if CONFIG_ZLIB #include #endif #include "talloc.h" #include "core/options.h" #include "core/bstr.h" #include "stream/stream.h" #include "demux.h" #include "stheader.h" #include "ebml.h" #include "matroska.h" //#include "demux_real.h" #include "core/mp_msg.h" static const unsigned char sipr_swaps[38][2] = { {0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68}, {13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46}, {25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56}, {42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83}, {77,80} }; // Map flavour to bytes per second #define SIPR_FLAVORS 4 #define ATRC_FLAVORS 8 #define COOK_FLAVORS 34 static const int sipr_fl2bps[SIPR_FLAVORS] = { 813, 1062, 625, 2000 }; static const int atrc_fl2bps[ATRC_FLAVORS] = { 8269, 11714, 13092, 16538, 18260, 22050, 33075, 44100 }; static const int cook_fl2bps[COOK_FLAVORS] = { 1000, 1378, 2024, 2584, 4005, 5513, 8010, 4005, 750, 2498, 4048, 5513, 8010, 11973, 8010, 2584, 4005, 2067, 2584, 2584, 4005, 4005, 5513, 5513, 8010, 12059, 1550, 8010, 12059, 5513, 12016, 16408, 22911, 33506 }; 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; uint32_t a_formattag; uint32_t a_channels, a_bps; float a_sfreq; float a_osfreq; double default_duration; int default_track; unsigned char *private_data; unsigned int private_size; /* stuff for realmedia */ int realmedia; int64_t rv_kf_base; int rv_kf_pts; double rv_pts; /* previous video timestamp */ double ra_pts; /* previous audio timestamp */ /** realaudio descrambling */ int sub_packet_size; ///< sub packet size, per stream int sub_packet_h; ///< number of coded frames per block int coded_framesize; ///< coded frame size, per stream int audiopk_size; ///< audio packet size unsigned char *audio_buf; ///< place to store reordered audio data double *audio_timestamp; ///< timestamp for each audio packet int sub_packet_cnt; ///< number of subpacket already received int audio_filepos; ///< file position of first audio packet in block /* stuff for quicktime */ int fix_i_bps; double qt_last_a_pts; /* generic content encoding support */ mkv_content_encoding_t *encodings; int num_encodings; /* latest added index entry for this track */ int last_index_entry; /* For VobSubs and SSA/ASS */ sh_sub_t *sh_sub; } mkv_track_t; typedef struct mkv_index { int tnum; uint64_t timecode, filepos; } mkv_index_t; typedef struct mkv_demuxer { int64_t segment_start; double duration, last_pts; uint64_t last_filepos; mkv_track_t **tracks; int num_tracks; uint64_t tc_scale, cluster_tc; uint64_t cluster_start; uint64_t cluster_end; mkv_index_t *indexes; int num_indexes; bool index_complete; int64_t *parsed_pos; int num_parsed_pos; bool parsed_info; bool parsed_tracks; bool parsed_tags; bool parsed_chapters; bool parsed_attachments; uint64_t skip_to_timecode; int v_skip_to_keyframe, a_skip_to_keyframe; bool subtitle_preroll; } mkv_demuxer_t; #define REALHEADER_SIZE 16 #define RVPROPERTIES_SIZE 34 #define RAPROPERTIES4_SIZE 56 #define RAPROPERTIES5_SIZE 70 /** * \brief ensures there is space for at least one additional element * \param array array to grow * \param nelem current number of elements in array * \param elsize size of one array element */ static void *grow_array(void *array, int nelem, size_t elsize) { if (!(nelem & 31)) array = realloc(array, (nelem + 32) * elsize); return array; } static bool is_parsed_header(struct mkv_demuxer *mkv_d, int64_t pos) { int low = 0; int high = mkv_d->num_parsed_pos; while (high > low + 1) { int mid = high + low >> 1; if (mkv_d->parsed_pos[mid] > pos) high = mid; else low = mid; } if (mkv_d->num_parsed_pos && mkv_d->parsed_pos[low] == pos) return true; if (!(mkv_d->num_parsed_pos & 31)) mkv_d->parsed_pos = talloc_realloc(mkv_d, mkv_d->parsed_pos, int64_t, mkv_d->num_parsed_pos + 32); mkv_d->num_parsed_pos++; for (int i = mkv_d->num_parsed_pos - 1; i > low; i--) mkv_d->parsed_pos[i] = mkv_d->parsed_pos[i - 1]; mkv_d->parsed_pos[low] = pos; return false; } #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(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 CONFIG_ZLIB /* zlib encoded track */ if (size == 0) continue; z_stream zstream; zstream.zalloc = (alloc_func) 0; zstream.zfree = (free_func) 0; zstream.opaque = (voidpf) 0; if (inflateInit(&zstream) != Z_OK) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] zlib initialization failed.\n"); goto error; } zstream.next_in = (Bytef *) src; zstream.avail_in = size; dest = NULL; zstream.avail_out = size; int result; do { size += 4000; dest = talloc_realloc_size(NULL, dest, size); zstream.next_out = (Bytef *) (dest + zstream.total_out); result = inflate(&zstream, Z_NO_FLUSH); if (result != Z_OK && result != Z_STREAM_END) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] zlib decompression failed.\n"); talloc_free(dest); dest = NULL; inflateEnd(&zstream); goto error; } zstream.avail_out += 4000; } while (zstream.avail_out == 4000 && zstream.avail_in != 0 && result != Z_STREAM_END); size = zstream.total_out; inflateEnd(&zstream); #endif } else if (enc->comp_algo == 2) { /* lzo encoded track */ int out_avail; int dstlen = size * 3; dest = NULL; while (1) { int srclen = size; dest = talloc_realloc_size(NULL, dest, dstlen + AV_LZO_OUTPUT_PADDING); out_avail = dstlen; int result = av_lzo1x_decode(dest, &out_avail, src, &srclen); if (result == 0) break; if (!(result & AV_LZO_OUTPUT_FULL)) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] lzo decompression failed.\n"); talloc_free(dest); dest = NULL; goto error; } mp_msg(MSGT_DEMUX, MSGL_DBG2, "[mkv] lzo decompression buffer too small.\n"); dstlen *= 2; } size = dstlen - out_avail; } else if (enc->comp_algo == 3) { dest = talloc_size(NULL, size + enc->comp_settings_len); memcpy(dest, enc->comp_settings, enc->comp_settings_len); memcpy(dest + enc->comp_settings_len, src, size); size += enc->comp_settings_len; } } error: if (src != dest && src != orig_src) talloc_free(src); 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; mkv_d->tc_scale = 1000000; mkv_d->duration = 0; struct ebml_info info = {}; struct ebml_parse_ctx parse_ctx = {}; if (ebml_read_element(s, &parse_ctx, &info, &ebml_info_desc) < 0) return -1; if (info.n_timecode_scale) { mkv_d->tc_scale = info.timecode_scale; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + timecode scale: %" PRIu64 "\n", mkv_d->tc_scale); } if (info.n_duration) { mkv_d->duration = info.duration * mkv_d->tc_scale / 1e9; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + duration: %.3fs\n", mkv_d->duration); } if (info.n_segment_uid) { int len = info.segment_uid.len; if (len != sizeof(demuxer->matroska_data.segment_uid)) { mp_msg(MSGT_DEMUX, MSGL_INFO, "[mkv] segment uid invalid length %d\n", len); } else { memcpy(demuxer->matroska_data.segment_uid, info.segment_uid.start, len); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + segment uid"); for (int i = 0; i < len; i++) mp_msg(MSGT_DEMUX, MSGL_V, " %02x", demuxer->matroska_data.segment_uid[i]); mp_msg(MSGT_DEMUX, MSGL_V, "\n"); } } if (demuxer->params && demuxer->params->matroska_wanted_uids) { unsigned char (*uids)[16] = demuxer->params->matroska_wanted_uids; if (!info.n_segment_uid) uids = NULL; for (int i = 0; i < MP_TALLOC_ELEMS(uids); i++) { if (!memcmp(info.segment_uid.start, uids[i], 16)) goto out; } mp_tmsg(MSGT_DEMUX, MSGL_INFO, "[mkv] This is not one of the wanted files. " "Stopping attempt to open.\n"); res = -2; } out: talloc_free(parse_ctx.talloc_ctx); return res; } static void parse_trackencodings(struct demuxer *demuxer, struct mkv_track *track, struct ebml_content_encodings *encodings) { // initial allocation to be a non-NULL context before realloc mkv_content_encoding_t *ce = talloc_size(track, 1); for (int n_enc = 0; n_enc < encodings->n_content_encoding; n_enc++) { struct ebml_content_encoding *enc = encodings->content_encoding + n_enc; struct mkv_content_encoding e = {}; e.order = enc->content_encoding_order; if (enc->n_content_encoding_scope) e.scope = enc->content_encoding_scope; else e.scope = 1; e.type = enc->content_encoding_type; if (enc->n_content_compression) { struct ebml_content_compression *z = &enc->content_compression; e.comp_algo = z->content_comp_algo; if (z->n_content_comp_settings) { int sz = z->content_comp_settings.len; e.comp_settings = talloc_size(ce, sz); memcpy(e.comp_settings, z->content_comp_settings.start, sz); e.comp_settings_len = sz; } } if (e.type == 1) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Track " "number %u has been encrypted and " "decryption has not yet been\n" "[mkv] implemented. Skipping track.\n", track->tnum); } else if (e.type != 0) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unknown content encoding type for " "track %u. Skipping track.\n", track->tnum); } else if (e.comp_algo != 0 && e.comp_algo != 2 && e.comp_algo != 3) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Track %u has been compressed with " "an unknown/unsupported compression\n" "[mkv] algorithm (%" PRIu64 "). Skipping track.\n", track->tnum, e.comp_algo); } #if !CONFIG_ZLIB else if (e.comp_algo == 0) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Track %u was compressed with zlib " "but mpv has not been compiled\n" "[mkv] with support for zlib compression. " "Skipping track.\n", track->tnum); } #endif int i; for (i = 0; i < n_enc; i++) if (e.order >= ce[i].order) break; ce = talloc_realloc_size(track, ce, (n_enc + 1) * sizeof(*ce)); memmove(ce + i + 1, ce + i, (n_enc - i) * sizeof(*ce)); memcpy(ce + i, &e, sizeof(e)); } track->encodings = ce; track->num_encodings = encodings->n_content_encoding; } static void parse_trackaudio(struct demuxer *demuxer, struct mkv_track *track, struct ebml_audio *audio) { if (audio->n_sampling_frequency) { track->a_sfreq = audio->sampling_frequency; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Sampling frequency: %f\n", track->a_sfreq); } else track->a_sfreq = 8000; if (audio->n_output_sampling_frequency) { track->a_osfreq = audio->output_sampling_frequency; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Output sampling frequency: %f\n", track->a_osfreq); } else track->a_osfreq = track->a_sfreq; // Something creates files with osfreq incorrectly set if (track->a_sfreq == 44100 && track->a_osfreq == 96000) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Audio track has codec frequency " "%.1f and playback frequency %.1f.\n[mkv] This looks wrong. " "Assuming this file is corrupt and ignoring the latter.\n", track->a_sfreq, track->a_osfreq); track->a_osfreq = track->a_sfreq; } if (audio->n_bit_depth) { track->a_bps = audio->bit_depth; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Bit depth: %u\n", track->a_bps); } if (audio->n_channels) { track->a_channels = audio->channels; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Channels: %u\n", track->a_channels); } else track->a_channels = 1; } static void parse_trackvideo(struct demuxer *demuxer, struct mkv_track *track, struct ebml_video *video) { if (video->n_frame_rate) { track->v_frate = video->frame_rate; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Frame rate: %f\n", track->v_frate); if (track->v_frate > 0) track->default_duration = 1 / track->v_frate; } if (video->n_display_width) { track->v_dwidth = video->display_width; track->v_dwidth_set = true; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Display width: %u\n", track->v_dwidth); } if (video->n_display_height) { track->v_dheight = video->display_height; track->v_dheight_set = true; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Display height: %u\n", track->v_dheight); } if (video->n_pixel_width) { track->v_width = video->pixel_width; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Pixel width: %u\n", track->v_width); } if (video->n_pixel_height) { track->v_height = video->pixel_height; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Pixel height: %u\n", track->v_height); } 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_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Colorspace: %#x\n", (unsigned int)track->colorspace); } } /** * \brief free any data associated with given track * \param track track of which to free data */ static void demux_mkv_free_trackentry(mkv_track_t *track) { free(track->audio_buf); free(track->audio_timestamp); talloc_free(track); } static void parse_trackentry(struct demuxer *demuxer, struct ebml_track_entry *entry) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; struct mkv_track *track = talloc_zero_size(NULL, sizeof(*track)); track->last_index_entry = -1; track->tnum = entry->track_number; if (track->tnum) mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Track number: %u\n", track->tnum); else mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Missing track number!\n"); if (entry->n_name) { track->name = talloc_strndup(track, entry->name.start, entry->name.len); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Name: %s\n", track->name); } track->type = entry->track_type; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Track type: "); switch (track->type) { case MATROSKA_TRACK_AUDIO: mp_msg(MSGT_DEMUX, MSGL_V, "Audio\n"); break; case MATROSKA_TRACK_VIDEO: mp_msg(MSGT_DEMUX, MSGL_V, "Video\n"); break; case MATROSKA_TRACK_SUBTITLE: mp_msg(MSGT_DEMUX, MSGL_V, "Subtitle\n"); break; default: mp_msg(MSGT_DEMUX, MSGL_V, "unknown\n"); break; } if (entry->n_audio) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Audio track\n"); parse_trackaudio(demuxer, track, &entry->audio); } if (entry->n_video) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Video track\n"); parse_trackvideo(demuxer, track, &entry->video); } if (entry->n_codec_id) { track->codec_id = talloc_strndup(track, entry->codec_id.start, entry->codec_id.len); if (!strcmp(track->codec_id, MKV_V_MSCOMP) || !strcmp(track->codec_id, MKV_A_ACM)) track->ms_compat = 1; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Codec ID: %s\n", track->codec_id); } else mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Missing codec ID!\n"); if (entry->n_codec_private) { int len = entry->codec_private.len; track->private_data = talloc_size(track, len + AV_LZO_INPUT_PADDING); memcpy(track->private_data, entry->codec_private.start, len); track->private_size = len; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + CodecPrivate, length %u\n", track->private_size); } if (entry->n_language) { track->language = talloc_strndup(track, entry->language.start, entry->language.len); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Language: %s\n", track->language); } else track->language = talloc_strdup(track, "eng"); if (entry->n_flag_default) { track->default_track = entry->flag_default; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Default flag: %u\n", track->default_track); } else track->default_track = 1; if (entry->n_default_duration) { track->default_duration = entry->default_duration / 1e9; if (entry->default_duration == 0) mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Default duration: 0"); else { if (!track->v_frate) track->v_frate = 1e9 / entry->default_duration; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + Default duration: %.3fms ( = %.3f fps)\n", entry->default_duration / 1000000.0, track->v_frate); } } if (entry->n_content_encodings) parse_trackencodings(demuxer, track, &entry->content_encodings); mkv_d->tracks[mkv_d->num_tracks++] = track; } static int demux_mkv_read_tracks(demuxer_t *demuxer) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; stream_t *s = demuxer->stream; struct ebml_tracks tracks = {}; struct ebml_parse_ctx parse_ctx = {}; if (ebml_read_element(s, &parse_ctx, &tracks, &ebml_tracks_desc) < 0) return -1; mkv_d->tracks = talloc_size(mkv_d, tracks.n_track_entry * sizeof(*mkv_d->tracks)); for (int i = 0; i < tracks.n_track_entry; i++) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] | + a track...\n"); parse_trackentry(demuxer, &tracks.track_entry[i]); } talloc_free(parse_ctx.talloc_ctx); return 0; } static 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; mkv_d->indexes = grow_array(mkv_d->indexes, mkv_d->num_indexes, sizeof(mkv_index_t)); mkv_d->indexes[mkv_d->num_indexes].tnum = track_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 >= 0) { 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) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; stream_t *s = demuxer->stream; if (index_mode == 0 || index_mode == 2) { ebml_read_skip(s, NULL); return 0; } mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing cues ] -----------\n"); struct ebml_cues cues = {}; struct ebml_parse_ctx parse_ctx = {}; if (ebml_read_element(s, &parse_ctx, &cues, &ebml_cues_desc) < 0) return -1; for (int i = 0; i < cues.n_cue_point; i++) { struct ebml_cue_point *cuepoint = &cues.cue_point[i]; if (cuepoint->n_cue_time != 1 || !cuepoint->n_cue_track_positions) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Malformed CuePoint element\n"); continue; } uint64_t time = cuepoint->cue_time; for (int i = 0; i < cuepoint->n_cue_track_positions; i++) { struct ebml_cue_track_positions *trackpos = &cuepoint->cue_track_positions[i]; uint64_t pos = mkv_d->segment_start + trackpos->cue_cluster_position; cue_index_add(demuxer, trackpos->cue_track, pos, time); mp_msg(MSGT_DEMUX, MSGL_DBG2, "[mkv] |+ 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_msg(MSGT_DEMUX, MSGL_V, "[mkv] \\---- [ parsing cues ] -----------\n"); talloc_free(parse_ctx.talloc_ctx); return 0; } static int demux_mkv_read_chapters(struct demuxer *demuxer) { struct MPOpts *opts = demuxer->opts; stream_t *s = demuxer->stream; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing chapters ] ---------\n"); struct ebml_chapters file_chapters = {}; struct ebml_parse_ctx parse_ctx = {}; if (ebml_read_element(s, &parse_ctx, &file_chapters, &ebml_chapters_desc) < 0) return -1; int selected_edition = 0; int num_editions = file_chapters.n_edition_entry; struct ebml_edition_entry *editions = file_chapters.edition_entry; if (opts->edition_id >= 0 && opts->edition_id < num_editions) { selected_edition = opts->edition_id; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] User-specified edition: %d\n", selected_edition); } else for (int i = 0; i < num_editions; i++) if (editions[i].edition_flag_default) { selected_edition = i; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Default edition: %d\n", i); break; } struct matroska_chapter *m_chapters = NULL; if (editions[selected_edition].edition_flag_ordered) { int count = editions[selected_edition].n_chapter_atom; m_chapters = talloc_array_ptrtype(demuxer, m_chapters, count); demuxer->matroska_data.ordered_chapters = m_chapters; demuxer->matroska_data.num_ordered_chapters = count; } for (int idx = 0; idx < num_editions; idx++) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] New edition %d\n", idx); int warn_level = idx == selected_edition ? MSGL_WARN : MSGL_V; if (editions[idx].n_edition_flag_default) mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Default edition flag: %"PRIu64 "\n", editions[idx].edition_flag_default); if (editions[idx].n_edition_flag_ordered) mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Ordered chapter flag: %"PRIu64 "\n", editions[idx].edition_flag_ordered); for (int i = 0; i < editions[idx].n_chapter_atom; i++) { struct ebml_chapter_atom *ca = editions[idx].chapter_atom + i; struct matroska_chapter chapter = { }; struct bstr name = { "(unnamed)", 9 }; if (!ca->n_chapter_time_start) mp_msg(MSGT_DEMUX, warn_level, "[mkv] Chapter lacks start time\n"); chapter.start = ca->chapter_time_start; chapter.end = ca->chapter_time_end; if (ca->n_chapter_display) { if (ca->n_chapter_display > 1) mp_msg(MSGT_DEMUX, warn_level, "[mkv] Multiple chapter " "names not supported, picking first\n"); if (!ca->chapter_display[0].n_chap_string) mp_msg(MSGT_DEMUX, warn_level, "[mkv] Malformed chapter " "name entry\n"); else name = ca->chapter_display[0].chap_string; } if (ca->n_chapter_segment_uid) { chapter.has_segment_uid = true; int len = ca->chapter_segment_uid.len; if (len != sizeof(chapter.segment_uid)) mp_msg(MSGT_DEMUX, warn_level, "[mkv] Chapter segment uid bad length %d\n", len); else if (ca->n_chapter_segment_edition_uid) { mp_tmsg(MSGT_DEMUX, warn_level, "[mkv] Warning: " "unsupported edition recursion in chapter; " "will skip on playback!\n"); } else { memcpy(chapter.segment_uid, ca->chapter_segment_uid.start, len); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Chapter segment uid "); for (int i = 0; i < len; i++) mp_msg(MSGT_DEMUX, MSGL_V, "%02x ", chapter.segment_uid[i]); mp_msg(MSGT_DEMUX, MSGL_V, "\n"); } } mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Chapter %u from %02d:%02d:%02d.%03d " "to %02d:%02d:%02d.%03d, %.*s\n", i, (int) (chapter.start / 60 / 60 / 1000000000), (int) ((chapter.start / 60 / 1000000000) % 60), (int) ((chapter.start / 1000000000) % 60), (int) (chapter.start % 1000000000), (int) (chapter.end / 60 / 60 / 1000000000), (int) ((chapter.end / 60 / 1000000000) % 60), (int) ((chapter.end / 1000000000) % 60), (int) (chapter.end % 1000000000), BSTR_P(name)); if (idx == selected_edition){ demuxer_add_chapter(demuxer, name, chapter.start, chapter.end); if (editions[idx].edition_flag_ordered) { chapter.name = talloc_strndup(m_chapters, name.start, name.len); m_chapters[i] = chapter; } } } } if (num_editions > 1) mp_msg(MSGT_DEMUX, MSGL_INFO, "[mkv] Found %d editions, will play #%d (first is 0).\n", num_editions, selected_edition); demuxer->num_editions = num_editions; demuxer->edition = selected_edition; talloc_free(parse_ctx.talloc_ctx); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] \\---- [ parsing chapters ] ---------\n"); return 0; } static int demux_mkv_read_tags(demuxer_t *demuxer) { stream_t *s = demuxer->stream; struct ebml_parse_ctx parse_ctx = {}; struct ebml_tags tags = {}; if (ebml_read_element(s, &parse_ctx, &tags, &ebml_tags_desc) < 0) return -1; for (int i = 0; i < tags.n_tag; i++) { struct ebml_tag tag = tags.tag[i]; if (tag.targets.target_track_uid || tag.targets.target_edition_uid || tag.targets.target_chapter_uid || tag.targets.target_attachment_uid) continue; for (int j = 0; j < tag.n_simple_tag; j++) demux_info_add_bstr(demuxer, tag.simple_tag[j].tag_name, tag.simple_tag[j].tag_string); } talloc_free(parse_ctx.talloc_ctx); return 0; } static int demux_mkv_read_attachments(demuxer_t *demuxer) { stream_t *s = demuxer->stream; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing attachments ] ---------\n"); struct ebml_attachments attachments = {}; struct ebml_parse_ctx parse_ctx = {}; if (ebml_read_element(s, &parse_ctx, &attachments, &ebml_attachments_desc) < 0) return -1; for (int i = 0; i < attachments.n_attached_file; i++) { struct ebml_attached_file *attachment = &attachments.attached_file[i]; if (!attachment->n_file_name || !attachment->n_file_mime_type || !attachment->n_file_data) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Malformed attachment\n"); continue; } struct bstr name = attachment->file_name; struct bstr mime = attachment->file_mime_type; demuxer_add_attachment(demuxer, name, mime, attachment->file_data); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Attachment: %.*s, %.*s, %zu bytes\n", BSTR_P(name), BSTR_P(mime), attachment->file_data.len); } talloc_free(parse_ctx.talloc_ctx); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] \\---- [ parsing attachments ] ---------\n"); return 0; } static int read_header_element(struct demuxer *demuxer, uint32_t id, int64_t at_filepos); static int demux_mkv_read_seekhead(demuxer_t *demuxer) { struct mkv_demuxer *mkv_d = demuxer->priv; struct stream *s = demuxer->stream; int res = 0; struct ebml_seek_head seekhead = {}; struct ebml_parse_ctx parse_ctx = {}; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] /---- [ parsing seek head ] ---------\n"); if (ebml_read_element(s, &parse_ctx, &seekhead, &ebml_seek_head_desc) < 0) { res = -1; goto out; } /* off now holds the position of the next element after the seek head. */ int64_t off = stream_tell(s); for (int i = 0; i < seekhead.n_seek; i++) { struct ebml_seek *seek = &seekhead.seek[i]; if (seek->n_seek_id != 1 || seek->n_seek_position != 1) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Invalid SeekHead entry\n"); continue; } uint64_t pos = seek->seek_position + mkv_d->segment_start; if (pos >= demuxer->movi_end) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] SeekHead position beyond " "end of file - incomplete file?\n"); continue; } int r = read_header_element(demuxer, seek->seek_id, pos); if (r <= -2) { res = r; goto out; } } if (!stream_seek(s, off)) { mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Couldn't seek back after " "SeekHead??\n"); res = -1; } out: mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] \\---- [ parsing seek head ] ---------\n"); talloc_free(parse_ctx.talloc_ctx); return res; } static bool seek_pos_id(struct stream *s, int64_t pos, uint32_t id) { if (!stream_seek(s, pos)) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Failed to seek in file\n"); return false; } if (ebml_read_id(s, NULL) != id) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Expected element not found\n"); return false; } return true; } static int read_header_element(struct demuxer *demuxer, uint32_t id, int64_t at_filepos) { struct mkv_demuxer *mkv_d = demuxer->priv; stream_t *s = demuxer->stream; int64_t pos = stream_tell(s) - 4; int res = 1; switch(id) { case MATROSKA_ID_INFO: if (mkv_d->parsed_info) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ segment information...\n"); mkv_d->parsed_info = true; return demux_mkv_read_info(demuxer); case MATROSKA_ID_TRACKS: if (mkv_d->parsed_tracks) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; mkv_d->parsed_tracks = true; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ segment tracks...\n"); return demux_mkv_read_tracks(demuxer); case MATROSKA_ID_CUES: if (is_parsed_header(mkv_d, pos)) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; return demux_mkv_read_cues(demuxer); case MATROSKA_ID_TAGS: if (mkv_d->parsed_tags) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; mkv_d->parsed_tags = true; return demux_mkv_read_tags(demuxer); case MATROSKA_ID_SEEKHEAD: if (is_parsed_header(mkv_d, pos)) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; return demux_mkv_read_seekhead(demuxer); case MATROSKA_ID_CHAPTERS: if (mkv_d->parsed_chapters) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; mkv_d->parsed_chapters = true; return demux_mkv_read_chapters(demuxer); case MATROSKA_ID_ATTACHMENTS: if (mkv_d->parsed_attachments) break; if (at_filepos && !seek_pos_id(s, at_filepos, id)) return -1; mkv_d->parsed_attachments = true; return demux_mkv_read_attachments(demuxer); case EBML_ID_VOID: break; default: res = 2; } if (!at_filepos && id != EBML_ID_INVALID) ebml_read_skip(s, NULL); return res; } 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++) { char *type = "unknown", str[32]; *str = '\0'; switch (mkv_d->tracks[i]->type) { case MATROSKA_TRACK_VIDEO: type = "video"; demux_mkv_open_video(demuxer, mkv_d->tracks[i]); break; case MATROSKA_TRACK_AUDIO: type = "audio"; demux_mkv_open_audio(demuxer, mkv_d->tracks[i]); break; case MATROSKA_TRACK_SUBTITLE: type = "subtitles"; demux_mkv_open_sub(demuxer, mkv_d->tracks[i]); break; } if (mkv_d->tracks[i]->name) mp_tmsg(MSGT_DEMUX, MSGL_V, "[mkv] Track ID %u: %s (%s) \"%s\"\n", mkv_d->tracks[i]->tnum, type, mkv_d->tracks[i]->codec_id, mkv_d->tracks[i]->name); else mp_tmsg(MSGT_DEMUX, MSGL_V, "[mkv] Track ID %u: %s (%s)\n", mkv_d->tracks[i]->tnum, type, mkv_d->tracks[i]->codec_id); } } typedef struct { char *id; int fourcc; int extradata; } videocodec_info_t; static const videocodec_info_t vinfo[] = { {MKV_V_MJPEG, mmioFOURCC('m', 'j', 'p', 'g'), 1}, {MKV_V_MPEG1, mmioFOURCC('m', 'p', 'g', '1'), 0}, {MKV_V_MPEG2, mmioFOURCC('m', 'p', 'g', '2'), 0}, {MKV_V_MPEG4_SP, mmioFOURCC('m', 'p', '4', 'v'), 1}, {MKV_V_MPEG4_ASP, mmioFOURCC('m', 'p', '4', 'v'), 1}, {MKV_V_MPEG4_AP, mmioFOURCC('m', 'p', '4', 'v'), 1}, {MKV_V_MPEG4_AVC, mmioFOURCC('a', 'v', 'c', '1'), 1}, {MKV_V_THEORA, mmioFOURCC('t', 'h', 'e', 'o'), 1}, {MKV_V_VP8, mmioFOURCC('V', 'P', '8', '0'), 0}, {MKV_V_VP9, mmioFOURCC('V', 'P', '9', '0'), 0}, {NULL, 0, 0} }; static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track) { BITMAPINFOHEADER *bih = &(BITMAPINFOHEADER){0}; unsigned char *extradata; unsigned int extradata_size = 0; struct sh_stream *sh; sh_video_t *sh_v; bool raw = false; if (track->ms_compat) { /* MS compatibility mode */ BITMAPINFOHEADER *src; if (track->private_data == NULL || track->private_size < sizeof(*bih)) return 1; src = (BITMAPINFOHEADER *) track->private_data; bih->biSize = le2me_32(src->biSize); bih->biWidth = le2me_32(src->biWidth); bih->biHeight = le2me_32(src->biHeight); bih->biPlanes = le2me_16(src->biPlanes); bih->biBitCount = le2me_16(src->biBitCount); bih->biCompression = le2me_32(src->biCompression); bih->biSizeImage = le2me_32(src->biSizeImage); bih->biXPelsPerMeter = le2me_32(src->biXPelsPerMeter); bih->biYPelsPerMeter = le2me_32(src->biYPelsPerMeter); bih->biClrUsed = le2me_32(src->biClrUsed); bih->biClrImportant = le2me_32(src->biClrImportant); extradata = track->private_data; extradata_size = track->private_size - sizeof(*bih); if (track->v_width == 0) track->v_width = bih->biWidth; if (track->v_height == 0) track->v_height = bih->biHeight; } else { bih->biSize = sizeof(*bih); bih->biWidth = track->v_width; bih->biHeight = track->v_height; bih->biBitCount = 24; bih->biSizeImage = bih->biWidth * bih->biHeight * bih->biBitCount / 8; if (track->private_size >= RVPROPERTIES_SIZE && (!strcmp(track->codec_id, MKV_V_REALV10) || !strcmp(track->codec_id, MKV_V_REALV20) || !strcmp(track->codec_id, MKV_V_REALV30) || !strcmp(track->codec_id, MKV_V_REALV40))) { unsigned char *src; uint32_t type2; unsigned int cnt; src = (uint8_t *) track->private_data + RVPROPERTIES_SIZE; cnt = track->private_size - RVPROPERTIES_SIZE; bih->biSize = 48 + cnt; bih->biPlanes = 1; type2 = AV_RB32(src - 4); if (type2 == 0x10003000 || type2 == 0x10003001) bih->biCompression = mmioFOURCC('R', 'V', '1', '3'); else bih->biCompression = mmioFOURCC('R', 'V', track->codec_id[9], '0'); // 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 bih->biCompression = track->colorspace; raw = true; } else { const videocodec_info_t *vi = vinfo; while (vi->id && strcmp(vi->id, track->codec_id)) vi++; bih->biCompression = vi->fourcc; if (vi->extradata && track->private_data && (track->private_size > 0)) { bih->biSize += track->private_size; extradata = track->private_data; extradata_size = track->private_size; } if (!vi->id) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unknown/unsupported " "CodecID (%s) or missing/bad CodecPrivate\n" "[mkv] data (track %u).\n", track->codec_id, track->tnum); return 1; } } } sh = new_sh_stream(demuxer, STREAM_VIDEO); if (!sh) return 1; track->stream = sh; sh_v = sh->video; sh_v->gsh->demuxer_id = track->tnum; sh_v->gsh->title = talloc_strdup(sh_v, track->name); sh_v->bih = malloc(sizeof(BITMAPINFOHEADER) + extradata_size); if (!sh_v->bih) { mp_msg(MSGT_DEMUX, MSGL_FATAL, "Memory allocation failure!\n"); abort(); } *sh_v->bih = *bih; if (extradata_size) memcpy(sh_v->bih + 1, extradata, extradata_size); sh_v->format = sh_v->bih->biCompression; if (raw) { sh_v->gsh->codec = "rawvideo"; } else { mp_set_video_codec_from_tag(sh_v); sh_v->format = mp_video_fourcc_alias(sh_v->format); } if (track->v_frate == 0.0) track->v_frate = 25.0; sh_v->fps = track->v_frate; sh_v->frametime = 1 / track->v_frate; sh_v->aspect = 0; if (!track->realmedia) { sh_v->disp_w = track->v_width; sh_v->disp_h = track->v_height; 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_msg(MSGT_DEMUX, MSGL_V, "[mkv] Aspect: %f\n", sh_v->aspect); return 0; } static struct mkv_audio_tag { char *id; bool prefix; uint32_t formattag; } mkv_audio_tags[] = { { MKV_A_MP2, 0, 0x0055 }, { MKV_A_MP3, 0, 0x0055 }, { MKV_A_AC3, 1, 0x2000 }, { MKV_A_EAC3, 1, mmioFOURCC('E', 'A', 'C', '3') }, { MKV_A_DTS, 0, 0x2001 }, { MKV_A_PCM, 0, 0x0001 }, { MKV_A_PCM_BE, 0, 0x0001 }, { MKV_A_AAC_2MAIN, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_2LC, 1, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_2SSR, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_4MAIN, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_4LC, 1, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_4SSR, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC_4LTP, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_AAC, 0, mmioFOURCC('M', 'P', '4', 'A') }, { MKV_A_VORBIS, 0, mmioFOURCC('v', 'r', 'b', 's') }, { MKV_A_OPUS, 0, mmioFOURCC('O', 'p', 'u', 's') }, { MKV_A_OPUS_EXP, 0, mmioFOURCC('O', 'p', 'u', 's') }, { MKV_A_QDMC, 0, mmioFOURCC('Q', 'D', 'M', 'C') }, { MKV_A_QDMC2, 0, mmioFOURCC('Q', 'D', 'M', '2') }, { MKV_A_WAVPACK, 0, mmioFOURCC('W', 'V', 'P', 'K') }, { MKV_A_TRUEHD, 0, mmioFOURCC('T', 'R', 'H', 'D') }, { MKV_A_FLAC, 0, mmioFOURCC('f', 'L', 'a', 'C') }, { MKV_A_ALAC, 0, mmioFOURCC('a', 'L', 'a', 'C') }, { MKV_A_REAL28, 0, mmioFOURCC('2', '8', '_', '8') }, { MKV_A_REALATRC, 0, mmioFOURCC('a', 't', 'r', 'c') }, { MKV_A_REALCOOK, 0, mmioFOURCC('c', 'o', 'o', 'k') }, { MKV_A_REALDNET, 0, mmioFOURCC('d', 'n', 'e', 't') }, { MKV_A_REALSIPR, 0, mmioFOURCC('s', 'i', 'p', 'r') }, { MKV_A_TTA1, 0, mmioFOURCC('T', 'T', 'A', '1') }, { NULL }, }; static int demux_mkv_open_audio(demuxer_t *demuxer, mkv_track_t *track) { struct sh_stream *sh = new_sh_stream(demuxer, STREAM_AUDIO); if (!sh) return 1; track->stream = sh; sh_audio_t *sh_a = sh->audio; if (track->language && (strcmp(track->language, "und") != 0)) sh_a->gsh->lang = talloc_strdup(sh_a, track->language); sh_a->gsh->demuxer_id = track->tnum; sh_a->gsh->title = talloc_strdup(sh_a, track->name); sh_a->gsh->default_track = track->default_track; if (track->ms_compat) { if (track->private_size < sizeof(*sh_a->wf)) goto error; WAVEFORMATEX *wf = (WAVEFORMATEX *) track->private_data; sh_a->wf = calloc(1, track->private_size); sh_a->wf->wFormatTag = le2me_16(wf->wFormatTag); sh_a->wf->nChannels = le2me_16(wf->nChannels); sh_a->wf->nSamplesPerSec = le2me_32(wf->nSamplesPerSec); sh_a->wf->nAvgBytesPerSec = le2me_32(wf->nAvgBytesPerSec); sh_a->wf->nBlockAlign = le2me_16(wf->nBlockAlign); sh_a->wf->wBitsPerSample = le2me_16(wf->wBitsPerSample); sh_a->wf->cbSize = track->private_size - sizeof(*sh_a->wf); memcpy(sh_a->wf + 1, wf + 1, track->private_size - sizeof(*sh_a->wf)); if (track->a_sfreq == 0.0) track->a_sfreq = sh_a->wf->nSamplesPerSec; if (track->a_channels == 0) track->a_channels = sh_a->wf->nChannels; if (track->a_bps == 0) track->a_bps = sh_a->wf->wBitsPerSample; track->a_formattag = sh_a->wf->wFormatTag; } else { sh_a->wf = calloc(1, sizeof(*sh_a->wf)); for (int i = 0; ; i++) { struct mkv_audio_tag *t = mkv_audio_tags + i; if (t->id == NULL) goto error; if (t->prefix) { if (!bstr_startswith0(bstr0(track->codec_id), t->id)) continue; } else { if (strcmp(track->codec_id, t->id)) continue; } track->a_formattag = t->formattag; break; } } sh_a->format = track->a_formattag; sh_a->wf->wFormatTag = track->a_formattag; sh_a->channels = track->a_channels; sh_a->wf->nChannels = track->a_channels; sh_a->samplerate = (uint32_t) track->a_sfreq; sh_a->container_out_samplerate = track->a_osfreq; sh_a->wf->nSamplesPerSec = (uint32_t) track->a_sfreq; if (track->a_bps == 0) sh_a->wf->wBitsPerSample = 16; else sh_a->wf->wBitsPerSample = track->a_bps; if (track->a_formattag == 0x0055) { /* MP3 || MP2 */ sh_a->wf->nAvgBytesPerSec = 16000; sh_a->wf->nBlockAlign = 1152; } else if ((track->a_formattag == 0x2000) /* AC3 */ || track->a_formattag == mmioFOURCC('E', 'A', 'C', '3') || (track->a_formattag == 0x2001)) { /* DTS */ free(sh_a->wf); sh_a->wf = NULL; } else if (track->a_formattag == 0x0001) { /* PCM || PCM_BE */ sh_a->wf->nAvgBytesPerSec = sh_a->channels * sh_a->samplerate * 2; sh_a->wf->nBlockAlign = sh_a->wf->nAvgBytesPerSec; if (!strcmp(track->codec_id, MKV_A_PCM_BE)) sh_a->format = mmioFOURCC('t', 'w', 'o', 's'); } else if (!strcmp(track->codec_id, MKV_A_QDMC) || !strcmp(track->codec_id, MKV_A_QDMC2)) { sh_a->wf->nAvgBytesPerSec = 16000; sh_a->wf->nBlockAlign = 1486; track->fix_i_bps = 1; track->qt_last_a_pts = 0.0; goto copy_private_data; } else if (track->a_formattag == mmioFOURCC('M', 'P', '4', 'A')) { int profile, srate_idx; sh_a->wf->nAvgBytesPerSec = 16000; sh_a->wf->nBlockAlign = 1024; if (!strcmp(track->codec_id, MKV_A_AAC) && track->private_data) goto copy_private_data; /* Recreate the 'private data' */ /* which faad2 uses in its initialization */ srate_idx = aac_get_sample_rate_index(sh_a->samplerate); if (!strncmp(&track->codec_id[12], "MAIN", 4)) profile = 0; else if (!strncmp(&track->codec_id[12], "LC", 2)) profile = 1; else if (!strncmp(&track->codec_id[12], "SSR", 3)) profile = 2; else profile = 3; sh_a->codecdata = malloc(5); sh_a->codecdata[0] = ((profile + 1) << 3) | ((srate_idx & 0xE) >> 1); sh_a->codecdata[1] = ((srate_idx & 0x1) << 7) | (track->a_channels << 3); if (strstr(track->codec_id, "SBR") != NULL) { /* HE-AAC (aka SBR AAC) */ sh_a->codecdata_len = 5; sh_a->samplerate *= 2; sh_a->wf->nSamplesPerSec *= 2; srate_idx = aac_get_sample_rate_index(sh_a->samplerate); sh_a->codecdata[2] = AAC_SYNC_EXTENSION_TYPE >> 3; sh_a->codecdata[3] = ((AAC_SYNC_EXTENSION_TYPE & 0x07) << 5) | 5; sh_a->codecdata[4] = (1 << 7) | (srate_idx << 3); track->default_duration = 1024.0 / (sh_a->samplerate / 2); } else { sh_a->codecdata_len = 2; track->default_duration = 1024.0 / sh_a->samplerate; } } else if (track->a_formattag == mmioFOURCC('v', 'r', 'b', 's')) { /* VORBIS */ if (track->private_size == 0 || track->ms_compat && !sh_a->wf->cbSize) goto error; if (!track->ms_compat) { sh_a->wf->cbSize = track->private_size; sh_a->wf = realloc(sh_a->wf, sizeof(*sh_a->wf) + sh_a->wf->cbSize); memcpy((unsigned char *) (sh_a->wf + 1), track->private_data, sh_a->wf->cbSize); } } else if (!strcmp(track->codec_id, MKV_A_OPUS) || !strcmp(track->codec_id, MKV_A_OPUS_EXP)) { sh_a->format = mmioFOURCC('O', 'p', 'u', 's'); } else if (!strncmp(track->codec_id, MKV_A_REALATRC, 7)) { if (track->private_size < RAPROPERTIES4_SIZE) goto error; /* Common initialization for all RealAudio codecs */ unsigned char *src = track->private_data; int codecdata_length, version; int flavor; sh_a->wf->nAvgBytesPerSec = 0; /* FIXME !? */ version = AV_RB16(src + 4); flavor = AV_RB16(src + 22); track->coded_framesize = AV_RB32(src + 24); track->sub_packet_h = AV_RB16(src + 40); sh_a->wf->nBlockAlign = track->audiopk_size = AV_RB16(src + 42); track->sub_packet_size = AV_RB16(src + 44); if (version == 4) { src += RAPROPERTIES4_SIZE; src += src[0] + 1; src += src[0] + 1; } else src += RAPROPERTIES5_SIZE; src += 3; if (version == 5) src++; codecdata_length = AV_RB32(src); src += 4; sh_a->wf->cbSize = codecdata_length; sh_a->wf = realloc(sh_a->wf, sizeof(*sh_a->wf) + sh_a->wf->cbSize); memcpy(((char *) (sh_a->wf + 1)), src, codecdata_length); switch (track->a_formattag) { case mmioFOURCC('a', 't', 'r', 'c'): sh_a->wf->nAvgBytesPerSec = atrc_fl2bps[flavor]; sh_a->wf->nBlockAlign = track->sub_packet_size; goto audiobuf; case mmioFOURCC('c', 'o', 'o', 'k'): sh_a->wf->nAvgBytesPerSec = cook_fl2bps[flavor]; sh_a->wf->nBlockAlign = track->sub_packet_size; goto audiobuf; case mmioFOURCC('s', 'i', 'p', 'r'): sh_a->wf->nAvgBytesPerSec = sipr_fl2bps[flavor]; sh_a->wf->nBlockAlign = track->coded_framesize; goto audiobuf; case mmioFOURCC('2', '8', '_', '8'): sh_a->wf->nAvgBytesPerSec = 3600; sh_a->wf->nBlockAlign = track->coded_framesize; audiobuf: track->audio_buf = malloc(track->sub_packet_h * track->audiopk_size); track->audio_timestamp = malloc(track->sub_packet_h * sizeof(double)); break; } track->realmedia = 1; } else if (!strcmp(track->codec_id, MKV_A_FLAC) || (track->a_formattag == 0xf1ac)) { unsigned char *ptr; int size; free(sh_a->wf); sh_a->wf = NULL; if (!track->ms_compat) { ptr = track->private_data; size = track->private_size; } else { sh_a->format = mmioFOURCC('f', 'L', 'a', 'C'); ptr = track->private_data + sizeof(*sh_a->wf); size = track->private_size - sizeof(*sh_a->wf); } if (size < 4 || ptr[0] != 'f' || ptr[1] != 'L' || ptr[2] != 'a' || ptr[3] != 'C') { sh_a->codecdata = malloc(4); sh_a->codecdata_len = 4; memcpy(sh_a->codecdata, "fLaC", 4); } else { sh_a->codecdata = malloc(size); sh_a->codecdata_len = size; memcpy(sh_a->codecdata, ptr, size); } } else if (!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 = malloc(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 == mmioFOURCC('W', 'V', 'P', 'K') || track->a_formattag == mmioFOURCC('T', 'R', 'H', 'D')) { copy_private_data: if (!track->ms_compat && track->private_size) { sh_a->codecdata = malloc(track->private_size); sh_a->codecdata_len = track->private_size; memcpy(sh_a->codecdata, track->private_data, track->private_size); } } else if (track->a_formattag == mmioFOURCC('T', 'T', 'A', '1')) { sh_a->codecdata_len = 30; sh_a->codecdata = calloc(1, sh_a->codecdata_len); if (!sh_a->codecdata) goto error; char *data = sh_a->codecdata; memcpy(data + 0, "TTA1", 4); AV_WL16(data + 4, 1); AV_WL16(data + 6, sh_a->channels); AV_WL16(data + 8, sh_a->wf->wBitsPerSample); AV_WL32(data + 10, sh_a->samplerate); // Bogus: last frame won't be played. AV_WL32(data + 14, 0); } else if (!track->ms_compat) { goto error; } mp_set_audio_codec_from_tag(sh_a); return 0; error: mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unknown/unsupported audio " "codec ID '%s' for track %u or missing/faulty\n[mkv] " "private codec data.\n", track->codec_id, track->tnum); return 1; } static const char *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"}, {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 (subtitle_type) { bstr in = (bstr){track->private_data, track->private_size}; struct sh_stream *gsh = new_sh_stream(demuxer, STREAM_SUB); if (!gsh) return 1; track->stream = gsh; sh_sub_t *sh = gsh->sub; sh->gsh->demuxer_id = track->tnum; track->sh_sub = sh; sh->gsh->codec = subtitle_type; bstr buffer = demux_mkv_decode(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->extradata = malloc(track->private_size); memcpy(sh->extradata, track->private_data, track->private_size); sh->extradata_len = track->private_size; if (track->language && (strcmp(track->language, "und") != 0)) sh->gsh->lang = talloc_strdup(sh, track->language); sh->gsh->title = talloc_strdup(sh, track->name); sh->gsh->default_track = track->default_track; } else { mp_tmsg(MSGT_DEMUX, MSGL_ERR, "[mkv] Subtitle type '%s' is not supported.\n", track->codec_id); return 1; } return 0; } static void mkv_free(struct demuxer *demuxer) { struct mkv_demuxer *mkv_d = demuxer->priv; if (!mkv_d) return; for (int i = 0; i < mkv_d->num_tracks; i++) demux_mkv_free_trackentry(mkv_d->tracks[i]); free(mkv_d->indexes); } static int read_ebml_header(demuxer_t *demuxer) { stream_t *s = demuxer->stream; if (ebml_read_id(s, NULL) != EBML_ID_EBML) return 0; struct ebml_ebml ebml_master = {}; struct ebml_parse_ctx parse_ctx = { .no_error_messages = true }; if (ebml_read_element(s, &parse_ctx, &ebml_master, &ebml_ebml_desc) < 0) return 0; if (ebml_master.doc_type.start == NULL) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] File has EBML header but no doctype." " Assuming \"matroska\".\n"); } else if (bstrcmp(ebml_master.doc_type, bstr0("matroska")) != 0 && bstrcmp(ebml_master.doc_type, bstr0("webm")) != 0) { mp_msg(MSGT_DEMUX, MSGL_DBG2, "[mkv] no head found\n"); talloc_free(parse_ctx.talloc_ctx); return 0; } if (ebml_master.doc_type_read_version > 2) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] This looks like a Matroska file, " "but we don't support format version %"PRIu64"\n", ebml_master.doc_type_read_version); talloc_free(parse_ctx.talloc_ctx); return 0; } if ((ebml_master.n_ebml_read_version && ebml_master.ebml_read_version != EBML_VERSION) || (ebml_master.n_ebml_max_size_length && ebml_master.ebml_max_size_length > 8) || (ebml_master.n_ebml_max_id_length && ebml_master.ebml_max_id_length != 4)) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] This looks like a Matroska file, " "but the header has bad parameters\n"); talloc_free(parse_ctx.talloc_ctx); return 0; } talloc_free(parse_ctx.talloc_ctx); return 1; } static int read_mkv_segment_header(demuxer_t *demuxer) { 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, NULL) != MATROSKA_ID_SEGMENT) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] segment not found\n"); return 0; } mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] + a segment...\n"); uint64_t len = ebml_read_length(s, NULL); if (num_skip <= 0) return 1; num_skip--; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] (skipping)\n"); if (len == EBML_UINT_INVALID) break; if (!stream_seek(s, stream_tell(s) + len)) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Failed to seek in file\n"); return 0; } // Segments are like concatenated Matroska files if (!read_ebml_header(demuxer)) return 0; } mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] End of file, no further segments.\n"); return 0; } static int demux_mkv_open(demuxer_t *demuxer) { stream_t *s = demuxer->stream; mkv_demuxer_t *mkv_d; stream_seek(s, s->start_pos); if (!read_ebml_header(demuxer)) return 0; mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] Found the head...\n"); if (!read_mkv_segment_header(demuxer)) return 0; mkv_d = talloc_zero(demuxer, struct mkv_demuxer); demuxer->priv = mkv_d; mkv_d->tc_scale = 1000000; mkv_d->segment_start = stream_tell(s); if (demuxer->params && demuxer->params->matroska_was_valid) *demuxer->params->matroska_was_valid = true; while (1) { uint32_t id = ebml_read_id(s, NULL); if (s->eof) { mp_tmsg(MSGT_DEMUX, MSGL_WARN, "[mkv] Unexpected end of file (no clusters found)\n"); break; } if (id == MATROSKA_ID_CLUSTER) { mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] |+ found cluster, headers are " "parsed completely :)\n"); stream_seek(s, stream_tell(s) - 4); break; } int res = read_header_element(demuxer, id, 0); if (res <= -2) return 0; if (res < 0) break; } display_create_tracks(demuxer); if (s->end_pos == 0) demuxer->seekable = 0; else { demuxer->movi_start = s->start_pos; demuxer->movi_end = s->end_pos; demuxer->seekable = 1; } demuxer->accurate_seek = true; return DEMUXER_TYPE_MATROSKA; } static 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; } } 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: mp_msg(MSGT_DEMUX, MSGL_ERR, "[mkv] Bad input [lacing]\n"); return 1; } #define SKIP_BITS(n) buffer<<=n #define SHOW_BITS(n) ((buffer)>>(32-(n))) static double real_fix_timestamp(unsigned char *buf, unsigned int timestamp, unsigned int format, int64_t *kf_base, int *kf_pts, double *pts){ double v_pts; unsigned char *s = buf + 1 + (*buf+1)*8; uint32_t buffer= (s[0]<<24) + (s[1]<<16) + (s[2]<<8) + s[3]; unsigned int kf=timestamp; if(format==mmioFOURCC('R','V','3','0') || format==mmioFOURCC('R','V','4','0')){ int pict_type; if(format==mmioFOURCC('R','V','3','0')){ SKIP_BITS(3); pict_type= SHOW_BITS(2); SKIP_BITS(2 + 7); }else{ SKIP_BITS(1); pict_type= SHOW_BITS(2); SKIP_BITS(2 + 7 + 3); } kf= SHOW_BITS(13); // kf= 2*SHOW_BITS(12); // if(pict_type==0) if(pict_type<=1){ // I frame, sync timestamps: *kf_base=(int64_t)timestamp-kf; mp_msg(MSGT_DEMUX, MSGL_DBG2,"\nTS: base=%08"PRIX64"\n",*kf_base); kf=timestamp; } else { // P/B frame, merge timestamps: int64_t tmp=(int64_t)timestamp-*kf_base; kf|=tmp&(~0x1fff); // combine with packet timestamp if(kftmp+4096) kf-=8192; kf+=*kf_base; } if(pict_type != 3){ // P || I frame -> swap timestamps unsigned int tmp=kf; kf=*kf_pts; *kf_pts=tmp; // if(kf<=tmp) kf=0; } } v_pts=kf*0.001f; // if(pts && (v_pts<*pts || !kf)) v_pts=*pts+frametime; if(pts) *pts=v_pts; return v_pts; } static void handle_realvideo(demuxer_t *demuxer, mkv_track_t *track, bstr data, bool keyframe) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; demux_packet_t *dp; uint32_t timestamp = mkv_d->last_pts * 1000; dp = new_demux_packet_from(data.start, data.len); if (mkv_d->v_skip_to_keyframe) { dp->pts = mkv_d->last_pts; track->rv_kf_base = 0; track->rv_kf_pts = timestamp; } else dp->pts = real_fix_timestamp(dp->buffer, timestamp, ((sh_video_t *) demuxer->video->sh)->bih-> biCompression, &track->rv_kf_base, &track->rv_kf_pts, NULL); dp->pos = demuxer->filepos; dp->keyframe = keyframe; demuxer_add_packet(demuxer, 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; int sps = track->sub_packet_size; int sph = track->sub_packet_h; int cfs = track->coded_framesize; int w = track->audiopk_size; int spc = track->sub_packet_cnt; uint8_t *buffer = data.start; uint32_t size = data.len; demux_packet_t *dp; if ((track->a_formattag == mmioFOURCC('2', '8', '_', '8')) || (track->a_formattag == mmioFOURCC('c', 'o', 'o', 'k')) || (track->a_formattag == mmioFOURCC('a', 't', 'r', 'c')) || (track->a_formattag == mmioFOURCC('s', 'i', 'p', 'r'))) { // if(!block_bref) // spc = track->sub_packet_cnt = 0; int x; switch (track->a_formattag) { case mmioFOURCC('2', '8', '_', '8'): for (x = 0; x < sph / 2; x++) memcpy(track->audio_buf + x * 2 * w + spc * cfs, buffer + cfs * x, cfs); break; case mmioFOURCC('c', 'o', 'o', 'k'): case mmioFOURCC('a', 't', 'r', 'c'): for (x = 0; x < w / sps; x++) memcpy(track->audio_buf + sps * (sph * x + ((sph + 1) / 2) * (spc & 1) + (spc >> 1)), buffer + sps * x, sps); break; case mmioFOURCC('s', 'i', 'p', 'r'): memcpy(track->audio_buf + spc * w, buffer, w); if (spc == sph - 1) { int n; int bs = sph * w * 2 / 96; // nibbles per subpacket // Perform reordering for (n = 0; n < 38; n++) { int j; int i = bs * sipr_swaps[n][0]; int o = bs * sipr_swaps[n][1]; // swap nibbles of block 'i' with 'o' TODO: optimize for (j = 0; j < bs; j++) { int x = (i & 1) ? (track->audio_buf[i >> 1] >> 4) : (track->audio_buf[i >> 1] & 0x0F); int y = (o & 1) ? (track->audio_buf[o >> 1] >> 4) : (track->audio_buf[o >> 1] & 0x0F); if (o & 1) track->audio_buf[o >> 1] = (track->audio_buf[o >> 1] & 0x0F) | (x << 4); else track->audio_buf[o >> 1] = (track->audio_buf[o >> 1] & 0xF0) | x; if (i & 1) track->audio_buf[i >> 1] = (track->audio_buf[i >> 1] & 0x0F) | (y << 4); else track->audio_buf[i >> 1] = (track->audio_buf[i >> 1] & 0xF0) | y; ++i; ++o; } } } break; } track->audio_timestamp[track->sub_packet_cnt] = (track->ra_pts == mkv_d->last_pts) ? 0 : (mkv_d->last_pts); track->ra_pts = mkv_d->last_pts; if (track->sub_packet_cnt == 0) track->audio_filepos = demuxer->filepos; if (++(track->sub_packet_cnt) == sph) { int apk_usize = ((sh_audio_t *) demuxer->audio->sh)->wf->nBlockAlign; track->sub_packet_cnt = 0; // Release all the audio packets for (x = 0; x < sph * w / apk_usize; x++) { dp = new_demux_packet_from(track->audio_buf + x * apk_usize, apk_usize); /* Put timestamp only on packets that correspond to original * audio packets in file */ dp->pts = (x * apk_usize % w) ? 0 : track->audio_timestamp[x * apk_usize / w]; dp->pos = track->audio_filepos; // all equal dp->keyframe = !x; // Mark first packet as keyframe demuxer_add_packet(demuxer, track->stream, dp); } } } else { // Not a codec that require reordering dp = new_demux_packet_from(buffer, size); if (track->ra_pts == mkv_d->last_pts && !mkv_d->a_skip_to_keyframe) dp->pts = 0; else dp->pts = mkv_d->last_pts; track->ra_pts = mkv_d->last_pts; dp->pos = demuxer->filepos; dp->keyframe = keyframe; demuxer_add_packet(demuxer, track->stream, dp); } } struct block_info { uint64_t duration; bool simple, keyframe; uint64_t timecode; mkv_track_t *track; bstr data; void *alloc; }; 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, struct block_info *block) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; stream_t *s = demuxer->stream; int num; int16_t time; uint64_t length; int res = -1; free_block(block); length = ebml_read_length(s, NULL); if (length > 500000000) goto exit; block->alloc = malloc(length + AV_LZO_INPUT_PADDING); if (!block->alloc) goto exit; block->data = (bstr){block->alloc, length}; demuxer->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 (!demuxer_stream_is_selected(demuxer, stream)) return 0; if (demux_mkv_read_block_lacing(&data, &laces, lace_size)) return 0; current_pts = tc / 1e9; if (track->type == MATROSKA_TRACK_AUDIO) { use_this_block = 1; if (mkv_d->a_skip_to_keyframe) use_this_block = keyframe; if (mkv_d->v_skip_to_keyframe) use_this_block = 0; if (track->fix_i_bps && use_this_block) { sh_audio_t *sh = stream->audio; if (block_duration != 0) { sh->i_bps = data.len * 1e9 / block_duration; track->fix_i_bps = 0; } else if (track->qt_last_a_pts == 0.0) track->qt_last_a_pts = current_pts; else if (track->qt_last_a_pts != current_pts) { sh->i_bps = data.len / (current_pts - track->qt_last_a_pts); track->fix_i_bps = 0; } } } else if (track->type == MATROSKA_TRACK_SUBTITLE) { use_this_block |= mkv_d->subtitle_preroll; if (use_this_block) { if (laces > 1) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] Subtitles use Matroska " "lacing. This is abnormal and not supported.\n"); use_this_block = 0; } } } else 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 = demuxer->filepos; 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 buffer = demux_mkv_decode(track, block, 1); if (buffer.start) { demux_packet_t *dp = new_demux_packet_from(buffer.start, buffer.len); if (buffer.start != block.start) talloc_free(buffer.start); dp->keyframe = keyframe; /* If default_duration is 0, assume no pts value is known * for packets after the first one (rather than all pts * values being the same) */ if (i == 0 || track->default_duration) dp->pts = mkv_d->last_pts + i * track->default_duration; dp->duration = block_duration / 1e9; demuxer_add_packet(demuxer, stream, dp); } } 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 = false; } 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, NULL)) { case MATROSKA_ID_BLOCKDURATION: block->duration = ebml_read_uint(s, NULL); if (block->duration == EBML_UINT_INVALID) goto error; block->duration *= mkv_d->tc_scale; break; case MATROSKA_ID_BLOCK: if (read_block(demuxer, block) < 0) goto error; break; case MATROSKA_ID_REFERENCEBLOCK:; int64_t num = ebml_read_int(s, NULL); if (num == EBML_INT_INVALID) goto error; if (num) block->keyframe = false; break; case EBML_ID_INVALID: goto error; default: if (ebml_read_skip_or_resync_cluster(s, NULL) != 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, NULL)) { case MATROSKA_ID_TIMECODE: { uint64_t num = ebml_read_uint(s, NULL); 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, NULL); end += stream_tell(s); 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, 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_or_resync_cluster(s, NULL) != 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, NULL); if (id == MATROSKA_ID_CLUSTER) break; if (s->eof) return -1; ebml_read_skip_or_resync_cluster(s, NULL); } next_cluster: mkv_d->cluster_end = ebml_read_length(s, NULL); // 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, demux_stream_t *ds) { 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; 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) { int64_t old_filepos = stream_tell(s); int64_t old_cluster_start = mkv_d->cluster_start; int64_t old_cluster_end = mkv_d->cluster_end; uint64_t old_cluster_tc = mkv_d->cluster_tc; if (index) stream_seek(s, index->filepos); mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] 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; } stream_seek(s, old_filepos); mkv_d->cluster_start = old_cluster_start; mkv_d->cluster_end = old_cluster_end; mkv_d->cluster_tc = old_cluster_tc; } if (!mkv_d->indexes) { mp_msg(MSGT_DEMUX, MSGL_WARN, "[mkv] 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 (int i = 0; i < mkv_d->num_indexes; i++) if (seek_id < 0 || mkv_d->indexes[i].tnum == seek_id) { int64_t diff = target_timecode - (int64_t) (mkv_d->indexes[i].timecode * mkv_d->tc_scale); if (flags & SEEK_BACKWARD) diff = -diff; if (diff <= 0) { if (min_diff <= 0 && diff <= min_diff) continue; } else if (diff >= min_diff) continue; min_diff = diff; index = mkv_d->indexes + i; } if (index) { /* We've found an entry. */ uint64_t seek_pos = index->filepos; if (mkv_d->subtitle_preroll) { uint64_t prev_target = 0; for (int 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, float rel_seek_secs, float audio_delay, int flags) { mkv_demuxer_t *mkv_d = demuxer->priv; uint64_t v_tnum = -1; uint64_t a_tnum = -1; bool st_active[STREAM_TYPE_COUNT] = {0}; for (int i = 0; i < mkv_d->num_tracks; i++) { mkv_track_t *track = mkv_d->tracks[i]; if (demuxer_stream_is_selected(demuxer, 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 = (flags & SEEK_SUBPREROLL) && st_active[STREAM_SUB]; 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 (st_active[STREAM_VIDEO]) mkv_d->v_skip_to_keyframe = 1; if (flags & SEEK_FORWARD) mkv_d->skip_to_timecode = target_timecode; else mkv_d->skip_to_timecode = index ? index->timecode * mkv_d->tc_scale : 0; mkv_d->a_skip_to_keyframe = 1; demux_mkv_fill_buffer(demuxer, NULL); } else if ((demuxer->movi_end <= 0) || !(flags & SEEK_ABSOLUTE)) mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] seek unsupported flags\n"); else { stream_t *s = demuxer->stream; uint64_t target_filepos; mkv_index_t *index = NULL; int i; if (!mkv_d->index_complete) { /* not implemented without index */ mp_msg(MSGT_DEMUX, MSGL_V, "[mkv] seek unsupported flags\n"); return; } target_filepos = (uint64_t) (demuxer->movi_end * rel_seek_secs); for (i = 0; i < mkv_d->num_indexes; i++) if (mkv_d->indexes[i].tnum == v_tnum) if ((index == NULL) || ((mkv_d->indexes[i].filepos >= target_filepos) && ((index->filepos < target_filepos) || (mkv_d->indexes[i].filepos < index->filepos)))) index = &mkv_d->indexes[i]; if (!index) return; mkv_d->cluster_end = 0; stream_seek(s, index->filepos); if (st_active[STREAM_VIDEO]) mkv_d->v_skip_to_keyframe = 1; mkv_d->skip_to_timecode = index->timecode * mkv_d->tc_scale; mkv_d->a_skip_to_keyframe = 1; demux_mkv_fill_buffer(demuxer, NULL); } } static int demux_mkv_control(demuxer_t *demuxer, int cmd, void *arg) { mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv; switch (cmd) { case DEMUXER_CTRL_CORRECT_PTS: return DEMUXER_CTRL_OK; case DEMUXER_CTRL_GET_TIME_LENGTH: if (mkv_d->duration == 0) return DEMUXER_CTRL_DONTKNOW; *((double *) arg) = (double) mkv_d->duration; return DEMUXER_CTRL_OK; default: return DEMUXER_CTRL_NOTIMPL; } } const demuxer_desc_t demuxer_desc_matroska = { "Matroska demuxer", "mkv", "Matroska", "Aurelien Jacobs", "", DEMUXER_TYPE_MATROSKA, 1, // safe autodetect demux_mkv_open, demux_mkv_fill_buffer, NULL, mkv_free, demux_mkv_seek, demux_mkv_control };