/* * Matroska file demuxer (no muxer yet) * Copyright (c) 2003-2004 The ffmpeg Project * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file matroskadec.c * Matroska file demuxer * by Ronald Bultje * with a little help from Moritz Bunkus * Specs available on the matroska project page: * http://www.matroska.org/. */ #include "avformat.h" /* For codec_get_id(). */ #include "riff.h" #include "isom.h" #include "matroska.h" #include "libavcodec/mpeg4audio.h" #include "libavutil/intfloat_readwrite.h" #include "libavutil/avstring.h" #include "libavutil/lzo.h" #ifdef CONFIG_ZLIB #include #endif #ifdef CONFIG_BZLIB #include #endif typedef enum { EBML_NONE, EBML_UINT, EBML_FLOAT, EBML_STR, EBML_UTF8, EBML_BIN, EBML_NEST, EBML_PASS, EBML_STOP, } EbmlType; typedef const struct EbmlSyntax { uint32_t id; EbmlType type; int list_elem_size; int data_offset; union { uint64_t u; double f; const char *s; const struct EbmlSyntax *n; } def; } EbmlSyntax; typedef struct { int nb_elem; void *elem; } EbmlList; typedef struct { int size; uint8_t *data; int64_t pos; } EbmlBin; typedef struct Track { MatroskaTrackType type; /* Unique track number and track ID. stream_index is the index that * the calling app uses for this track. */ uint32_t num; uint32_t uid; int stream_index; char *name; char language[4]; char *codec_id; unsigned char *codec_priv; int codec_priv_size; double time_scale; uint64_t default_duration; uint64_t flag_default; int encoding_scope; MatroskaTrackEncodingCompAlgo encoding_algo; uint8_t *encoding_settings; int encoding_settings_len; } MatroskaTrack; typedef struct MatroskaVideoTrack { MatroskaTrack track; int pixel_width; int pixel_height; int display_width; int display_height; uint32_t fourcc; //.. } MatroskaVideoTrack; typedef struct MatroskaAudioTrack { MatroskaTrack track; int channels; int bitdepth; int internal_samplerate; int samplerate; int block_align; /* real audio header */ int coded_framesize; int sub_packet_h; int frame_size; int sub_packet_size; int sub_packet_cnt; int pkt_cnt; uint8_t *buf; //.. } MatroskaAudioTrack; typedef struct MatroskaSubtitleTrack { MatroskaTrack track; //.. } MatroskaSubtitleTrack; #define MAX_TRACK_SIZE (FFMAX3(sizeof(MatroskaVideoTrack), \ sizeof(MatroskaAudioTrack), \ sizeof(MatroskaSubtitleTrack))) typedef struct MatroskaLevel { uint64_t start; uint64_t length; } MatroskaLevel; typedef struct MatroskaDemuxIndex { uint64_t pos; /* of the corresponding *cluster*! */ uint16_t track; /* reference to 'num' */ uint64_t time; /* in nanoseconds */ } MatroskaDemuxIndex; typedef struct MatroskaDemuxContext { AVFormatContext *ctx; /* ebml stuff */ int num_levels; MatroskaLevel levels[EBML_MAX_DEPTH]; int level_up; /* timescale in the file */ int64_t time_scale; /* num_streams is the number of streams that av_new_stream() was called * for ( = that are available to the calling program). */ int num_tracks; int num_streams; MatroskaTrack *tracks[MAX_STREAMS]; /* cache for ID peeking */ uint32_t peek_id; /* byte position of the segment inside the stream */ offset_t segment_start; /* The packet queue. */ AVPacket **packets; int num_packets; /* have we already parse metadata/cues/clusters? */ int metadata_parsed; int index_parsed; int done; /* The index for seeking. */ int num_indexes; MatroskaDemuxIndex *index; /* What to skip before effectively reading a packet. */ int skip_to_keyframe; AVStream *skip_to_stream; } MatroskaDemuxContext; #define ARRAY_SIZE(x) (sizeof(x)/sizeof(*x)) /* * The first few functions handle EBML file parsing. The rest * is the document interpretation. Matroska really just is a * EBML file. */ /* * Return: the amount of levels in the hierarchy that the * current element lies higher than the previous one. * The opposite isn't done - that's auto-done using master * element reading. */ static int ebml_read_element_level_up (MatroskaDemuxContext *matroska) { ByteIOContext *pb = matroska->ctx->pb; offset_t pos = url_ftell(pb); int num = 0; while (matroska->num_levels > 0) { MatroskaLevel *level = &matroska->levels[matroska->num_levels - 1]; if (pos >= level->start + level->length) { matroska->num_levels--; num++; } else { break; } } return num; } /* * Read: an "EBML number", which is defined as a variable-length * array of bytes. The first byte indicates the length by giving a * number of 0-bits followed by a one. The position of the first * "one" bit inside the first byte indicates the length of this * number. * Returns: num. of bytes read. < 0 on error. */ static int ebml_read_num (MatroskaDemuxContext *matroska, int max_size, uint64_t *number) { ByteIOContext *pb = matroska->ctx->pb; int len_mask = 0x80, read = 1, n = 1; int64_t total = 0; /* the first byte tells us the length in bytes - get_byte() can normally * return 0, but since that's not a valid first ebmlID byte, we can * use it safely here to catch EOS. */ if (!(total = get_byte(pb))) { /* we might encounter EOS here */ if (!url_feof(pb)) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); } return AVERROR(EIO); /* EOS or actual I/O error */ } /* get the length of the EBML number */ while (read <= max_size && !(total & len_mask)) { read++; len_mask >>= 1; } if (read > max_size) { offset_t pos = url_ftell(pb) - 1; av_log(matroska->ctx, AV_LOG_ERROR, "Invalid EBML number size tag 0x%02x at pos %"PRIu64" (0x%"PRIx64")\n", (uint8_t) total, pos, pos); return AVERROR_INVALIDDATA; } /* read out length */ total &= ~len_mask; while (n++ < read) total = (total << 8) | get_byte(pb); *number = total; return read; } /* * Read: the element content data ID. * Return: the number of bytes read or < 0 on error. */ static int ebml_read_element_id (MatroskaDemuxContext *matroska, uint32_t *id, int *level_up) { int read; uint64_t total; /* if we re-call this, use our cached ID */ if (matroska->peek_id != 0) { if (level_up) *level_up = 0; *id = matroska->peek_id; return 0; } /* read out the "EBML number", include tag in ID */ if ((read = ebml_read_num(matroska, 4, &total)) < 0) return read; *id = matroska->peek_id = total | (1 << (read * 7)); /* level tracking */ if (level_up) *level_up = ebml_read_element_level_up(matroska); return read; } /* * Read: element content length. * Return: the number of bytes read or < 0 on error. */ static int ebml_read_element_length (MatroskaDemuxContext *matroska, uint64_t *length) { /* clear cache since we're now beyond that data point */ matroska->peek_id = 0; /* read out the "EBML number", include tag in ID */ return ebml_read_num(matroska, 8, length); } /* * Return: the ID of the next element, or 0 on error. * Level_up contains the amount of levels that this * next element lies higher than the previous one. */ static uint32_t ebml_peek_id (MatroskaDemuxContext *matroska, int *level_up) { uint32_t id; if (ebml_read_element_id(matroska, &id, level_up) < 0) return 0; return id; } /* * Seek to a given offset. * 0 is success, -1 is failure. */ static int ebml_read_seek (MatroskaDemuxContext *matroska, offset_t offset) { ByteIOContext *pb = matroska->ctx->pb; /* clear ID cache, if any */ matroska->peek_id = 0; return (url_fseek(pb, offset, SEEK_SET) == offset) ? 0 : -1; } /* * Skip the next element. * 0 is success, -1 is failure. */ static int ebml_read_skip (MatroskaDemuxContext *matroska) { ByteIOContext *pb = matroska->ctx->pb; uint32_t id; uint64_t length; int res; if ((res = ebml_read_element_id(matroska, &id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &length)) < 0) return res; url_fskip(pb, length); return 0; } /* * Read the next element as an unsigned int. * 0 is success, < 0 is failure. */ static int ebml_read_uint (MatroskaDemuxContext *matroska, uint32_t *id, uint64_t *num) { ByteIOContext *pb = matroska->ctx->pb; int n = 0, size, res; uint64_t rlength; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &rlength)) < 0) return res; size = rlength; if (size < 1 || size > 8) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Invalid uint element size %d at position %"PRId64" (0x%"PRIx64")\n", size, pos, pos); return AVERROR_INVALIDDATA; } /* big-endian ordening; build up number */ *num = 0; while (n++ < size) *num = (*num << 8) | get_byte(pb); return 0; } /* * Read the next element as a signed int. * 0 is success, < 0 is failure. */ static int ebml_read_sint (MatroskaDemuxContext *matroska, uint32_t *id, int64_t *num) { ByteIOContext *pb = matroska->ctx->pb; int size, n = 1, negative = 0, res; uint64_t rlength; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &rlength)) < 0) return res; size = rlength; if (size < 1 || size > 8) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Invalid sint element size %d at position %"PRId64" (0x%"PRIx64")\n", size, pos, pos); return AVERROR_INVALIDDATA; } if ((*num = get_byte(pb)) & 0x80) { negative = 1; *num &= ~0x80; } while (n++ < size) *num = (*num << 8) | get_byte(pb); /* make signed */ if (negative) *num = *num - (1LL << ((8 * size) - 1)); return 0; } /* * Read the next element as a float. * 0 is success, < 0 is failure. */ static int ebml_read_float (MatroskaDemuxContext *matroska, uint32_t *id, double *num) { ByteIOContext *pb = matroska->ctx->pb; int size, res; uint64_t rlength; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &rlength)) < 0) return res; size = rlength; if (size == 4) { *num= av_int2flt(get_be32(pb)); } else if(size==8){ *num= av_int2dbl(get_be64(pb)); } else{ offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Invalid float element size %d at position %"PRIu64" (0x%"PRIx64")\n", size, pos, pos); return AVERROR_INVALIDDATA; } return 0; } /* * Read the next element as an ASCII string. * 0 is success, < 0 is failure. */ static int ebml_read_ascii (MatroskaDemuxContext *matroska, uint32_t *id, char **str) { ByteIOContext *pb = matroska->ctx->pb; int size, res; uint64_t rlength; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &rlength)) < 0) return res; size = rlength; /* ebml strings are usually not 0-terminated, so we allocate one * byte more, read the string and NULL-terminate it ourselves. */ if (size < 0 || !(*str = av_malloc(size + 1))) { av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation failed\n"); return AVERROR(ENOMEM); } if (get_buffer(pb, (uint8_t *) *str, size) != size) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); av_free(*str); return AVERROR(EIO); } (*str)[size] = '\0'; return 0; } /* * Read the next element as a UTF-8 string. * 0 is success, < 0 is failure. */ static int ebml_read_utf8 (MatroskaDemuxContext *matroska, uint32_t *id, char **str) { return ebml_read_ascii(matroska, id, str); } /* * Read the next element, but only the header. The contents * are supposed to be sub-elements which can be read separately. * 0 is success, < 0 is failure. */ static int ebml_read_master (MatroskaDemuxContext *matroska, uint32_t *id) { ByteIOContext *pb = matroska->ctx->pb; uint64_t length; MatroskaLevel *level; int res; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &length)) < 0) return res; /* protect... (Heaven forbids that the '>' is true) */ if (matroska->num_levels >= EBML_MAX_DEPTH) { av_log(matroska->ctx, AV_LOG_ERROR, "File moves beyond max. allowed depth (%d)\n", EBML_MAX_DEPTH); return AVERROR(ENOSYS); } /* remember level */ level = &matroska->levels[matroska->num_levels++]; level->start = url_ftell(pb); level->length = length; return 0; } /* * Read the next element as binary data. * 0 is success, < 0 is failure. */ static int ebml_read_binary (MatroskaDemuxContext *matroska, uint32_t *id, uint8_t **binary, int *size) { ByteIOContext *pb = matroska->ctx->pb; uint64_t rlength; int res; if ((res = ebml_read_element_id(matroska, id, NULL)) < 0 || (res = ebml_read_element_length(matroska, &rlength)) < 0) return res; *size = rlength; if (!(*binary = av_malloc(*size))) { av_log(matroska->ctx, AV_LOG_ERROR, "Memory allocation error\n"); return AVERROR(ENOMEM); } if (get_buffer(pb, *binary, *size) != *size) { offset_t pos = url_ftell(pb); av_log(matroska->ctx, AV_LOG_ERROR, "Read error at pos. %"PRIu64" (0x%"PRIx64")\n", pos, pos); return AVERROR(EIO); } return 0; } /* * Read signed/unsigned "EBML" numbers. * Return: number of bytes processed, < 0 on error. * XXX: use ebml_read_num(). */ static int matroska_ebmlnum_uint (uint8_t *data, uint32_t size, uint64_t *num) { int len_mask = 0x80, read = 1, n = 1, num_ffs = 0; uint64_t total; if (size <= 0) return AVERROR_INVALIDDATA; total = data[0]; while (read <= 8 && !(total & len_mask)) { read++; len_mask >>= 1; } if (read > 8) return AVERROR_INVALIDDATA; if ((total &= (len_mask - 1)) == len_mask - 1) num_ffs++; if (size < read) return AVERROR_INVALIDDATA; while (n < read) { if (data[n] == 0xff) num_ffs++; total = (total << 8) | data[n]; n++; } if (read == num_ffs) *num = (uint64_t)-1; else *num = total; return read; } /* * Same as above, but signed. */ static int matroska_ebmlnum_sint (uint8_t *data, uint32_t size, int64_t *num) { uint64_t unum; int res; /* read as unsigned number first */ if ((res = matroska_ebmlnum_uint(data, size, &unum)) < 0) return res; /* make signed (weird way) */ if (unum == (uint64_t)-1) *num = INT64_MAX; else *num = unum - ((1LL << ((7 * res) - 1)) - 1); return res; } /* * Read an EBML header. * 0 is success, < 0 is failure. */ static int ebml_read_header (MatroskaDemuxContext *matroska, char **doctype, int *version) { uint32_t id; int level_up, res = 0; /* default init */ if (doctype) *doctype = NULL; if (version) *version = 1; if (!(id = ebml_peek_id(matroska, &level_up)) || level_up != 0 || id != EBML_ID_HEADER) { av_log(matroska->ctx, AV_LOG_ERROR, "This is not an EBML file (id=0x%x/0x%x)\n", id, EBML_ID_HEADER); return AVERROR_INVALIDDATA; } if ((res = ebml_read_master(matroska, &id)) < 0) return res; while (res == 0) { if (!(id = ebml_peek_id(matroska, &level_up))) return AVERROR(EIO); /* end-of-header */ if (level_up) break; switch (id) { /* is our read version uptodate? */ case EBML_ID_EBMLREADVERSION: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) return res; if (num > EBML_VERSION) { av_log(matroska->ctx, AV_LOG_ERROR, "EBML version %"PRIu64" (> %d) is not supported\n", num, EBML_VERSION); return AVERROR_INVALIDDATA; } break; } /* we only handle 8 byte lengths at max */ case EBML_ID_EBMLMAXSIZELENGTH: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) return res; if (num > sizeof(uint64_t)) { av_log(matroska->ctx, AV_LOG_ERROR, "Integers of size %"PRIu64" (> %zd) not supported\n", num, sizeof(uint64_t)); return AVERROR_INVALIDDATA; } break; } /* we handle 4 byte IDs at max */ case EBML_ID_EBMLMAXIDLENGTH: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) return res; if (num > sizeof(uint32_t)) { av_log(matroska->ctx, AV_LOG_ERROR, "IDs of size %"PRIu64" (> %zu) not supported\n", num, sizeof(uint32_t)); return AVERROR_INVALIDDATA; } break; } case EBML_ID_DOCTYPE: { char *text; if ((res = ebml_read_ascii(matroska, &id, &text)) < 0) return res; if (doctype) { if (*doctype) av_free(*doctype); *doctype = text; } else av_free(text); break; } case EBML_ID_DOCTYPEREADVERSION: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) return res; if (version) *version = num; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown data type 0x%x in EBML header", id); /* pass-through */ case EBML_ID_VOID: /* we ignore these two, as they don't tell us anything we * care about */ case EBML_ID_EBMLVERSION: case EBML_ID_DOCTYPEVERSION: res = ebml_read_skip (matroska); break; } } return 0; } static int matroska_find_track_by_num (MatroskaDemuxContext *matroska, int num) { int i; for (i = 0; i < matroska->num_tracks; i++) if (matroska->tracks[i]->num == num) return i; return -1; } /* * Put one packet in an application-supplied AVPacket struct. * Returns 0 on success or -1 on failure. */ static int matroska_deliver_packet (MatroskaDemuxContext *matroska, AVPacket *pkt) { if (matroska->num_packets > 0) { memcpy(pkt, matroska->packets[0], sizeof(AVPacket)); av_free(matroska->packets[0]); if (matroska->num_packets > 1) { memmove(&matroska->packets[0], &matroska->packets[1], (matroska->num_packets - 1) * sizeof(AVPacket *)); matroska->packets = av_realloc(matroska->packets, (matroska->num_packets - 1) * sizeof(AVPacket *)); } else { av_freep(&matroska->packets); } matroska->num_packets--; return 0; } return -1; } /* * Put a packet into our internal queue. Will be delivered to the * user/application during the next get_packet() call. */ static void matroska_queue_packet (MatroskaDemuxContext *matroska, AVPacket *pkt) { matroska->packets = av_realloc(matroska->packets, (matroska->num_packets + 1) * sizeof(AVPacket *)); matroska->packets[matroska->num_packets] = pkt; matroska->num_packets++; } /* * Free all packets in our internal queue. */ static void matroska_clear_queue (MatroskaDemuxContext *matroska) { if (matroska->packets) { int n; for (n = 0; n < matroska->num_packets; n++) { av_free_packet(matroska->packets[n]); av_free(matroska->packets[n]); } av_free(matroska->packets); matroska->packets = NULL; matroska->num_packets = 0; } } /* * Autodetecting... */ static int matroska_probe (AVProbeData *p) { uint64_t total = 0; int len_mask = 0x80, size = 1, n = 1; uint8_t probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' }; /* ebml header? */ if (AV_RB32(p->buf) != EBML_ID_HEADER) return 0; /* length of header */ total = p->buf[4]; while (size <= 8 && !(total & len_mask)) { size++; len_mask >>= 1; } if (size > 8) return 0; total &= (len_mask - 1); while (n < size) total = (total << 8) | p->buf[4 + n++]; /* does the probe data contain the whole header? */ if (p->buf_size < 4 + size + total) return 0; /* the header must contain the document type 'matroska'. For now, * we don't parse the whole header but simply check for the * availability of that array of characters inside the header. * Not fully fool-proof, but good enough. */ for (n = 4 + size; n <= 4 + size + total - sizeof(probe_data); n++) if (!memcmp (&p->buf[n], probe_data, sizeof(probe_data))) return AVPROBE_SCORE_MAX; return 0; } /* * From here on, it's all XML-style DTD stuff... Needs no comments. */ static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data, uint32_t expected_id, int once); static int ebml_parse_elem(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data) { uint32_t id = syntax->id; EbmlBin *bin; int res; data = (char *)data + syntax->data_offset; if (syntax->list_elem_size) { EbmlList *list = data; list->elem = av_realloc(list->elem, (list->nb_elem+1)*syntax->list_elem_size); data = (char*)list->elem + list->nb_elem*syntax->list_elem_size; memset(data, 0, syntax->list_elem_size); list->nb_elem++; } bin = data; switch (syntax->type) { case EBML_UINT: return ebml_read_uint (matroska, &id, data); case EBML_FLOAT: return ebml_read_float(matroska, &id, data); case EBML_STR: case EBML_UTF8: av_free(*(char **)data); return ebml_read_ascii(matroska, &id, data); case EBML_BIN: av_free(bin->data); bin->pos = url_ftell(matroska->ctx->pb); return ebml_read_binary(matroska, &id, &bin->data, &bin->size); case EBML_NEST: if ((res=ebml_read_master(matroska, &id)) < 0) return res; if (id == MATROSKA_ID_SEGMENT) matroska->segment_start = url_ftell(matroska->ctx->pb); return ebml_parse(matroska, syntax->def.n, data, 0, 0); case EBML_PASS: return ebml_parse(matroska, syntax->def.n, data, 0, 1); case EBML_STOP: *(int *)data = 1; return 1; default: return ebml_read_skip(matroska); } } static int ebml_parse_id(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, uint32_t id, void *data) { int i; for (i=0; syntax[i].id; i++) if (id == syntax[i].id) break; if (!syntax[i].id) av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id); return ebml_parse_elem(matroska, &syntax[i], data); } static int ebml_parse(MatroskaDemuxContext *matroska, EbmlSyntax *syntax, void *data, uint32_t expected_id, int once) { int i, res = 0; uint32_t id = 0; for (i=0; syntax[i].id; i++) switch (syntax[i].type) { case EBML_UINT: *(uint64_t *)((char *)data+syntax[i].data_offset) = syntax[i].def.u; break; case EBML_FLOAT: *(double *)((char *)data+syntax[i].data_offset) = syntax[i].def.f; break; case EBML_STR: case EBML_UTF8: *(char **)((char *)data+syntax[i].data_offset) = av_strdup(syntax[i].def.s); break; } if (expected_id) { res = ebml_read_master(matroska, &id); if (id != expected_id) return AVERROR_INVALIDDATA; if (id == MATROSKA_ID_SEGMENT) matroska->segment_start = url_ftell(matroska->ctx->pb); } while (!res) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } res = ebml_parse_id(matroska, syntax, id, data); if (once) break; if (matroska->level_up) { matroska->level_up--; break; } } return res; } static void ebml_free(EbmlSyntax *syntax, void *data) { int i, j; for (i=0; syntax[i].id; i++) { void *data_off = (char *)data + syntax[i].data_offset; switch (syntax[i].type) { case EBML_STR: case EBML_UTF8: av_freep(data_off); break; case EBML_BIN: av_freep(&((EbmlBin *)data_off)->data); break; case EBML_NEST: if (syntax[i].list_elem_size) { EbmlList *list = data_off; char *ptr = list->elem; for (j=0; jnb_elem; j++, ptr+=syntax[i].list_elem_size) ebml_free(syntax[i].def.n, ptr); av_free(list->elem); } else ebml_free(syntax[i].def.n, data_off); default: break; } } } static int matroska_parse_info (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; av_log(matroska->ctx, AV_LOG_DEBUG, "Parsing info...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* cluster timecode */ case MATROSKA_ID_TIMECODESCALE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; matroska->time_scale = num; break; } case MATROSKA_ID_DURATION: { double num; if ((res = ebml_read_float(matroska, &id, &num)) < 0) break; matroska->ctx->duration = num * matroska->time_scale * 1000 / AV_TIME_BASE; break; } case MATROSKA_ID_TITLE: { char *text; if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) break; strncpy(matroska->ctx->title, text, sizeof(matroska->ctx->title)-1); av_free(text); break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in info header\n", id); /* fall-through */ case MATROSKA_ID_WRITINGAPP: case MATROSKA_ID_MUXINGAPP: case MATROSKA_ID_DATEUTC: case MATROSKA_ID_SEGMENTUID: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_decode_buffer(uint8_t** buf, int* buf_size, MatroskaTrack *track) { uint8_t* data = *buf; int isize = *buf_size; uint8_t* pkt_data = NULL; int pkt_size = isize; int result = 0; int olen; switch (track->encoding_algo) { case MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP: return track->encoding_settings_len; case MATROSKA_TRACK_ENCODING_COMP_LZO: do { olen = pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size+LZO_OUTPUT_PADDING); result = lzo1x_decode(pkt_data, &olen, data, &isize); } while (result==LZO_OUTPUT_FULL && pkt_size<10000000); if (result) goto failed; pkt_size -= olen; break; #ifdef CONFIG_ZLIB case MATROSKA_TRACK_ENCODING_COMP_ZLIB: { z_stream zstream = {0}; if (inflateInit(&zstream) != Z_OK) return -1; zstream.next_in = data; zstream.avail_in = isize; do { pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size); zstream.avail_out = pkt_size - zstream.total_out; zstream.next_out = pkt_data + zstream.total_out; result = inflate(&zstream, Z_NO_FLUSH); } while (result==Z_OK && pkt_size<10000000); pkt_size = zstream.total_out; inflateEnd(&zstream); if (result != Z_STREAM_END) goto failed; break; } #endif #ifdef CONFIG_BZLIB case MATROSKA_TRACK_ENCODING_COMP_BZLIB: { bz_stream bzstream = {0}; if (BZ2_bzDecompressInit(&bzstream, 0, 0) != BZ_OK) return -1; bzstream.next_in = data; bzstream.avail_in = isize; do { pkt_size *= 3; pkt_data = av_realloc(pkt_data, pkt_size); bzstream.avail_out = pkt_size - bzstream.total_out_lo32; bzstream.next_out = pkt_data + bzstream.total_out_lo32; result = BZ2_bzDecompress(&bzstream); } while (result==BZ_OK && pkt_size<10000000); pkt_size = bzstream.total_out_lo32; BZ2_bzDecompressEnd(&bzstream); if (result != BZ_STREAM_END) goto failed; break; } #endif } *buf = pkt_data; *buf_size = pkt_size; return 0; failed: av_free(pkt_data); return -1; } static int matroska_add_stream (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; MatroskaTrack *track; /* start with the master */ if ((res = ebml_read_master(matroska, &id)) < 0) return res; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing track, adding stream..,\n"); /* Allocate a generic track. */ track = av_mallocz(MAX_TRACK_SIZE); track->time_scale = 1.0; strcpy(track->language, "eng"); /* try reading the trackentry headers */ while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { /* track number (unique stream ID) */ case MATROSKA_ID_TRACKNUMBER: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; track->num = num; break; } /* track UID (unique identifier) */ case MATROSKA_ID_TRACKUID: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; track->uid = num; break; } /* track type (video, audio, combined, subtitle, etc.) */ case MATROSKA_ID_TRACKTYPE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (track->type && track->type != num) { av_log(matroska->ctx, AV_LOG_INFO, "More than one tracktype in an entry - skip\n"); break; } track->type = num; switch (track->type) { case MATROSKA_TRACK_TYPE_VIDEO: case MATROSKA_TRACK_TYPE_AUDIO: case MATROSKA_TRACK_TYPE_SUBTITLE: break; case MATROSKA_TRACK_TYPE_COMPLEX: case MATROSKA_TRACK_TYPE_LOGO: case MATROSKA_TRACK_TYPE_CONTROL: default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown or unsupported track type 0x%x\n", track->type); track->type = MATROSKA_TRACK_TYPE_NONE; break; } break; } /* tracktype specific stuff for video */ case MATROSKA_ID_TRACKVIDEO: { MatroskaVideoTrack *videotrack; if (!track->type) track->type = MATROSKA_TRACK_TYPE_VIDEO; if (track->type != MATROSKA_TRACK_TYPE_VIDEO) { av_log(matroska->ctx, AV_LOG_INFO, "video data in non-video track - ignoring\n"); res = AVERROR_INVALIDDATA; break; } else if ((res = ebml_read_master(matroska, &id)) < 0) break; videotrack = (MatroskaVideoTrack *)track; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { /* fixme, this should be one-up, but I get it here */ case MATROSKA_ID_TRACKDEFAULTDURATION: { uint64_t num; if ((res = ebml_read_uint (matroska, &id, &num)) < 0) break; track->default_duration = num; break; } /* video framerate */ case MATROSKA_ID_VIDEOFRAMERATE: { double num; if ((res = ebml_read_float(matroska, &id, &num)) < 0) break; if (!track->default_duration) track->default_duration = 1000000000/num; break; } /* width of the size to display the video at */ case MATROSKA_ID_VIDEODISPLAYWIDTH: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; videotrack->display_width = num; break; } /* height of the size to display the video at */ case MATROSKA_ID_VIDEODISPLAYHEIGHT: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; videotrack->display_height = num; break; } /* width of the video in the file */ case MATROSKA_ID_VIDEOPIXELWIDTH: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; videotrack->pixel_width = num; break; } /* height of the video in the file */ case MATROSKA_ID_VIDEOPIXELHEIGHT: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; videotrack->pixel_height = num; break; } /* whether the video is interlaced */ case MATROSKA_ID_VIDEOFLAGINTERLACED: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; break; } /* colorspace (only matters for raw video) * fourcc */ case MATROSKA_ID_VIDEOCOLORSPACE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; videotrack->fourcc = num; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown video track header entry " "0x%x - ignoring\n", id); /* pass-through */ case MATROSKA_ID_VIDEOSTEREOMODE: case MATROSKA_ID_VIDEOASPECTRATIO: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; } /* tracktype specific stuff for audio */ case MATROSKA_ID_TRACKAUDIO: { MatroskaAudioTrack *audiotrack; if (!track->type) track->type = MATROSKA_TRACK_TYPE_AUDIO; if (track->type != MATROSKA_TRACK_TYPE_AUDIO) { av_log(matroska->ctx, AV_LOG_INFO, "audio data in non-audio track - ignoring\n"); res = AVERROR_INVALIDDATA; break; } else if ((res = ebml_read_master(matroska, &id)) < 0) break; audiotrack = (MatroskaAudioTrack *)track; audiotrack->channels = 1; audiotrack->samplerate = 8000; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { /* samplerate */ case MATROSKA_ID_AUDIOSAMPLINGFREQ: { double num; if ((res = ebml_read_float(matroska, &id, &num)) < 0) break; audiotrack->internal_samplerate = audiotrack->samplerate = num; break; } case MATROSKA_ID_AUDIOOUTSAMPLINGFREQ: { double num; if ((res = ebml_read_float(matroska, &id, &num)) < 0) break; audiotrack->samplerate = num; break; } /* bitdepth */ case MATROSKA_ID_AUDIOBITDEPTH: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; audiotrack->bitdepth = num; break; } /* channels */ case MATROSKA_ID_AUDIOCHANNELS: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; audiotrack->channels = num; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown audio track header entry " "0x%x - ignoring\n", id); /* pass-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; } /* codec identifier */ case MATROSKA_ID_CODECID: { char *text; if ((res = ebml_read_ascii(matroska, &id, &text)) < 0) break; track->codec_id = text; break; } /* codec private data */ case MATROSKA_ID_CODECPRIVATE: { uint8_t *data; int size; if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0)) break; track->codec_priv = data; track->codec_priv_size = size; break; } /* name of this track */ case MATROSKA_ID_TRACKNAME: { char *text; if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) break; track->name = text; break; } /* language (matters for audio/subtitles, mostly) */ case MATROSKA_ID_TRACKLANGUAGE: { char *text, *end; if ((res = ebml_read_utf8(matroska, &id, &text)) < 0) break; if ((end = strchr(text, '-'))) *end = '\0'; if (strlen(text) == 3) strcpy(track->language, text); av_free(text); break; } /* whether this is actually used */ case MATROSKA_ID_TRACKFLAGENABLED: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; break; } /* whether it's the default for this track type */ case MATROSKA_ID_TRACKFLAGDEFAULT: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; track->flag_default = num; break; } /* lacing (like MPEG, where blocks don't end/start on frame * boundaries) */ case MATROSKA_ID_TRACKFLAGLACING: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; break; } /* default length (in time) of one data block in this track */ case MATROSKA_ID_TRACKDEFAULTDURATION: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; track->default_duration = num; break; } case MATROSKA_ID_TRACKCONTENTENCODINGS: { if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_TRACKCONTENTENCODING: { int encoding_scope = 1; if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_ENCODINGSCOPE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; encoding_scope = num; break; } case MATROSKA_ID_ENCODINGTYPE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (num) av_log(matroska->ctx, AV_LOG_ERROR, "Unsupported encoding type"); break; } case MATROSKA_ID_ENCODINGCOMPRESSION: { if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up > 0) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_ENCODINGCOMPALGO: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; if (num != MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP && #ifdef CONFIG_ZLIB num != MATROSKA_TRACK_ENCODING_COMP_ZLIB && #endif #ifdef CONFIG_BZLIB num != MATROSKA_TRACK_ENCODING_COMP_BZLIB && #endif num != MATROSKA_TRACK_ENCODING_COMP_LZO) av_log(matroska->ctx, AV_LOG_ERROR, "Unsupported compression algo\n"); track->encoding_algo = num; break; } case MATROSKA_ID_ENCODINGCOMPSETTINGS: { uint8_t *data; int size; if ((res = ebml_read_binary(matroska, &id, &data, &size) < 0)) break; track->encoding_settings = data; track->encoding_settings_len = size; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown compression header entry " "0x%x - ignoring\n", id); /* pass-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown content encoding header entry " "0x%x - ignoring\n", id); /* pass-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } track->encoding_scope = encoding_scope; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown content encodings header entry " "0x%x - ignoring\n", id); /* pass-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; } case MATROSKA_ID_TRACKTIMECODESCALE: { double num; if ((res = ebml_read_float(matroska, &id, &num)) < 0) break; track->time_scale = num; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown track header entry 0x%x - ignoring\n", id); /* pass-through */ case EBML_ID_VOID: /* we ignore these because they're nothing useful. */ case MATROSKA_ID_TRACKFLAGFORCED: case MATROSKA_ID_CODECNAME: case MATROSKA_ID_CODECDECODEALL: case MATROSKA_ID_CODECINFOURL: case MATROSKA_ID_CODECDOWNLOADURL: case MATROSKA_ID_TRACKMINCACHE: case MATROSKA_ID_TRACKMAXCACHE: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (track->codec_priv_size && track->encoding_scope & 2) { uint8_t *orig_priv = track->codec_priv; int offset = matroska_decode_buffer(&track->codec_priv, &track->codec_priv_size, track); if (offset > 0) { track->codec_priv = av_malloc(track->codec_priv_size + offset); memcpy(track->codec_priv, track->encoding_settings, offset); memcpy(track->codec_priv+offset, orig_priv, track->codec_priv_size); track->codec_priv_size += offset; av_free(orig_priv); } else if (!offset) { av_free(orig_priv); } else av_log(matroska->ctx, AV_LOG_ERROR, "Failed to decode codec private data\n"); } if (track->type && matroska->num_tracks < ARRAY_SIZE(matroska->tracks)) { matroska->tracks[matroska->num_tracks++] = track; } else { av_free(track); } return res; } static int matroska_parse_tracks (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing tracks...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* one track within the "all-tracks" header */ case MATROSKA_ID_TRACKENTRY: res = matroska_add_stream(matroska); break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in track header\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_parse_index (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; MatroskaDemuxIndex idx; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing index...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* one single index entry ('point') */ case MATROSKA_ID_POINTENTRY: if ((res = ebml_read_master(matroska, &id)) < 0) break; /* in the end, we hope to fill one entry with a * timestamp, a file position and a tracknum */ idx.pos = (uint64_t) -1; idx.time = (uint64_t) -1; idx.track = (uint16_t) -1; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* one single index entry ('point') */ case MATROSKA_ID_CUETIME: { uint64_t time; if ((res = ebml_read_uint(matroska, &id, &time)) < 0) break; idx.time = time * matroska->time_scale; break; } /* position in the file + track to which it * belongs */ case MATROSKA_ID_CUETRACKPOSITION: if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id (matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* track number */ case MATROSKA_ID_CUETRACK: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; idx.track = num; break; } /* position in file */ case MATROSKA_ID_CUECLUSTERPOSITION: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; idx.pos = num+matroska->segment_start; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in " "CuesTrackPositions\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in cuespoint " "index\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } /* so let's see if we got what we wanted */ if (idx.pos != (uint64_t) -1 && idx.time != (uint64_t) -1 && idx.track != (uint16_t) -1) { if (matroska->num_indexes % 32 == 0) { /* re-allocate bigger index */ matroska->index = av_realloc(matroska->index, (matroska->num_indexes + 32) * sizeof(MatroskaDemuxIndex)); } matroska->index[matroska->num_indexes] = idx; matroska->num_indexes++; } break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in cues header\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_parse_metadata (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* Hm, this is unsupported... */ default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in metadata header\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_parse_seekhead (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing seekhead...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_SEEKENTRY: { uint32_t seek_id = 0, peek_id_cache = 0; uint64_t seek_pos = (uint64_t) -1, t; int dummy_level = 0; if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_SEEKID: res = ebml_read_uint(matroska, &id, &t); seek_id = t; break; case MATROSKA_ID_SEEKPOSITION: res = ebml_read_uint(matroska, &id, &seek_pos); break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown seekhead ID 0x%x\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (!seek_id || seek_pos == (uint64_t) -1) { av_log(matroska->ctx, AV_LOG_INFO, "Incomplete seekhead entry (0x%x/%"PRIu64")\n", seek_id, seek_pos); break; } switch (seek_id) { case MATROSKA_ID_CUES: case MATROSKA_ID_TAGS: { uint32_t level_up = matroska->level_up; offset_t before_pos; uint64_t length; MatroskaLevel level; /* remember the peeked ID and the current position */ peek_id_cache = matroska->peek_id; before_pos = url_ftell(matroska->ctx->pb); /* seek */ if ((res = ebml_read_seek(matroska, seek_pos + matroska->segment_start)) < 0) goto finish; /* we don't want to lose our seekhead level, so we add * a dummy. This is a crude hack. */ if (matroska->num_levels == EBML_MAX_DEPTH) { av_log(matroska->ctx, AV_LOG_INFO, "Max EBML element depth (%d) reached, " "cannot parse further.\n", EBML_MAX_DEPTH); return AVERROR_UNKNOWN; } level.start = 0; level.length = (uint64_t)-1; matroska->levels[matroska->num_levels] = level; matroska->num_levels++; dummy_level = 1; /* check ID */ if (!(id = ebml_peek_id (matroska, &matroska->level_up))) goto finish; if (id != seek_id) { av_log(matroska->ctx, AV_LOG_INFO, "We looked for ID=0x%x but got " "ID=0x%x (pos=%"PRIu64")", seek_id, id, seek_pos + matroska->segment_start); goto finish; } /* read master + parse */ if ((res = ebml_read_master(matroska, &id)) < 0) goto finish; switch (id) { case MATROSKA_ID_CUES: if (!(res = matroska_parse_index(matroska)) || url_feof(matroska->ctx->pb)) { matroska->index_parsed = 1; res = 0; } break; case MATROSKA_ID_TAGS: if (!(res = matroska_parse_metadata(matroska)) || url_feof(matroska->ctx->pb)) { matroska->metadata_parsed = 1; res = 0; } break; } finish: /* remove dummy level */ if (dummy_level) while (matroska->num_levels) { matroska->num_levels--; length = matroska->levels[matroska->num_levels].length; if (length == (uint64_t)-1) break; } /* seek back */ if ((res = ebml_read_seek(matroska, before_pos)) < 0) return res; matroska->peek_id = peek_id_cache; matroska->level_up = level_up; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Ignoring seekhead entry for ID=0x%x\n", seek_id); break; } break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown seekhead ID 0x%x\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_parse_attachments(AVFormatContext *s) { MatroskaDemuxContext *matroska = s->priv_data; int res = 0; uint32_t id; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing attachments...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_ATTACHEDFILE: { char* name = NULL; char* mime = NULL; uint8_t* data = NULL; int i, data_size = 0; AVStream *st; if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_FILENAME: res = ebml_read_utf8 (matroska, &id, &name); break; case MATROSKA_ID_FILEMIMETYPE: res = ebml_read_ascii (matroska, &id, &mime); break; case MATROSKA_ID_FILEDATA: res = ebml_read_binary(matroska, &id, &data, &data_size); break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown attachedfile ID 0x%x\n", id); case MATROSKA_ID_FILEUID: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (!(name && mime && data && data_size > 0)) { av_log(matroska->ctx, AV_LOG_ERROR, "incomplete attachment\n"); break; } st = av_new_stream(s, matroska->num_streams++); if (st == NULL) return AVERROR(ENOMEM); st->filename = av_strdup(name); st->codec->codec_id = CODEC_ID_NONE; st->codec->codec_type = CODEC_TYPE_ATTACHMENT; st->codec->extradata = av_malloc(data_size); if(st->codec->extradata == NULL) return AVERROR(ENOMEM); st->codec->extradata_size = data_size; memcpy(st->codec->extradata, data, data_size); for (i=0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) { if (!strncmp(ff_mkv_mime_tags[i].str, mime, strlen(ff_mkv_mime_tags[i].str))) { st->codec->codec_id = ff_mkv_mime_tags[i].id; break; } } av_log(matroska->ctx, AV_LOG_DEBUG, "new attachment: %s, %s, size %d \n", name, mime, data_size); break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown attachments ID 0x%x\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_parse_chapters(AVFormatContext *s) { MatroskaDemuxContext *matroska = s->priv_data; int res = 0; uint32_t id; av_log(s, AV_LOG_DEBUG, "parsing chapters...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_EDITIONENTRY: { uint64_t end = AV_NOPTS_VALUE, start = AV_NOPTS_VALUE; int64_t uid= -1; char* title = NULL; /* if there is more than one chapter edition we take only the first one */ if(s->chapters) { ebml_read_skip(matroska); break; } if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_CHAPTERATOM: if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_CHAPTERTIMEEND: res = ebml_read_uint(matroska, &id, &end); break; case MATROSKA_ID_CHAPTERTIMESTART: res = ebml_read_uint(matroska, &id, &start); break; case MATROSKA_ID_CHAPTERDISPLAY: if ((res = ebml_read_master(matroska, &id)) < 0) break; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_CHAPSTRING: res = ebml_read_utf8(matroska, &id, &title); break; default: av_log(s, AV_LOG_INFO, "Ignoring unknown Chapter display ID 0x%x\n", id); case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; case MATROSKA_ID_CHAPTERUID: res = ebml_read_uint(matroska, &id, &uid); break; default: av_log(s, AV_LOG_INFO, "Ignoring unknown Chapter atom ID 0x%x\n", id); case MATROSKA_ID_CHAPTERFLAGHIDDEN: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (start != AV_NOPTS_VALUE && uid != -1) { if(!ff_new_chapter(s, uid, (AVRational){1, 1000000000}, start, end, title)) res= AVERROR(ENOMEM); } av_free(title); break; default: av_log(s, AV_LOG_INFO, "Ignoring unknown Edition entry ID 0x%x\n", id); case MATROSKA_ID_EDITIONUID: case MATROSKA_ID_EDITIONFLAGHIDDEN: case MATROSKA_ID_EDITIONFLAGDEFAULT: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } break; } default: av_log(s, AV_LOG_INFO, "Expected an Edition entry (0x%x), but found 0x%x\n", MATROSKA_ID_EDITIONENTRY, id); case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_aac_profile (char *codec_id) { static const char *aac_profiles[] = { "MAIN", "LC", "SSR" }; int profile; for (profile=0; profilepriv_data; char *doctype; int version, last_level, res = 0; uint32_t id; matroska->ctx = s; /* First read the EBML header. */ doctype = NULL; if ((res = ebml_read_header(matroska, &doctype, &version)) < 0) return res; if ((doctype == NULL) || strcmp(doctype, "matroska")) { av_log(matroska->ctx, AV_LOG_ERROR, "Wrong EBML doctype ('%s' != 'matroska').\n", doctype ? doctype : "(none)"); if (doctype) av_free(doctype); return AVERROR_NOFMT; } av_free(doctype); if (version > 2) { av_log(matroska->ctx, AV_LOG_ERROR, "Matroska demuxer version 2 too old for file version %d\n", version); return AVERROR_NOFMT; } /* The next thing is a segment. */ while (1) { if (!(id = ebml_peek_id(matroska, &last_level))) return AVERROR(EIO); if (id == MATROSKA_ID_SEGMENT) break; /* oi! */ av_log(matroska->ctx, AV_LOG_INFO, "Expected a Segment ID (0x%x), but received 0x%x!\n", MATROSKA_ID_SEGMENT, id); if ((res = ebml_read_skip(matroska)) < 0) return res; } /* We now have a Matroska segment. * Seeks are from the beginning of the segment, * after the segment ID/length. */ if ((res = ebml_read_master(matroska, &id)) < 0) return res; matroska->segment_start = url_ftell(s->pb); matroska->time_scale = 1000000; /* we've found our segment, start reading the different contents in here */ while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* stream info */ case MATROSKA_ID_INFO: { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_info(matroska); break; } /* track info headers */ case MATROSKA_ID_TRACKS: { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_tracks(matroska); break; } /* stream index */ case MATROSKA_ID_CUES: { if (!matroska->index_parsed) { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_index(matroska); } else res = ebml_read_skip(matroska); break; } /* metadata */ case MATROSKA_ID_TAGS: { if (!matroska->metadata_parsed) { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_metadata(matroska); } else res = ebml_read_skip(matroska); break; } /* file index (if seekable, seek to Cues/Tags to parse it) */ case MATROSKA_ID_SEEKHEAD: { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_seekhead(matroska); break; } case MATROSKA_ID_ATTACHMENTS: { if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_attachments(s); break; } case MATROSKA_ID_CLUSTER: { /* Do not read the master - this will be done in the next * call to matroska_read_packet. */ res = 1; break; } case MATROSKA_ID_CHAPTERS: { if ((res = ebml_read_master(matroska, &id)) < 0) return res; res = matroska_parse_chapters(s); break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown matroska file header ID 0x%x\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } /* Have we found a cluster? */ if (ebml_peek_id(matroska, NULL) == MATROSKA_ID_CLUSTER) { int i, j; MatroskaTrack *track; AVStream *st; for (i = 0; i < matroska->num_tracks; i++) { enum CodecID codec_id = CODEC_ID_NONE; uint8_t *extradata = NULL; int extradata_size = 0; int extradata_offset = 0; track = matroska->tracks[i]; track->stream_index = -1; /* Apply some sanity checks. */ if (track->codec_id == NULL) continue; for(j=0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++){ if(!strncmp(ff_mkv_codec_tags[j].str, track->codec_id, strlen(ff_mkv_codec_tags[j].str))){ codec_id= ff_mkv_codec_tags[j].id; break; } } /* Set the FourCC from the CodecID. */ /* This is the MS compatibility mode which stores a * BITMAPINFOHEADER in the CodecPrivate. */ if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_VIDEO_VFW_FOURCC) && (track->codec_priv_size >= 40) && (track->codec_priv != NULL)) { MatroskaVideoTrack *vtrack = (MatroskaVideoTrack *) track; /* Offset of biCompression. Stored in LE. */ vtrack->fourcc = AV_RL32(track->codec_priv + 16); codec_id = codec_get_id(codec_bmp_tags, vtrack->fourcc); } /* This is the MS compatibility mode which stores a * WAVEFORMATEX in the CodecPrivate. */ else if (!strcmp(track->codec_id, MATROSKA_CODEC_ID_AUDIO_ACM) && (track->codec_priv_size >= 18) && (track->codec_priv != NULL)) { uint16_t tag; /* Offset of wFormatTag. Stored in LE. */ tag = AV_RL16(track->codec_priv); codec_id = codec_get_id(codec_wav_tags, tag); } if (!strcmp(track->codec_id, "V_QUICKTIME") && (track->codec_priv_size >= 86) && (track->codec_priv != NULL)) { MatroskaVideoTrack *vtrack = (MatroskaVideoTrack *) track; vtrack->fourcc = AV_RL32(track->codec_priv); codec_id = codec_get_id(codec_movvideo_tags, vtrack->fourcc); } else if (codec_id == CODEC_ID_AAC && !track->codec_priv_size) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track; int profile = matroska_aac_profile(track->codec_id); int sri = matroska_aac_sri(audiotrack->internal_samplerate); extradata = av_malloc(5); if (extradata == NULL) return AVERROR(ENOMEM); extradata[0] = (profile << 3) | ((sri&0x0E) >> 1); extradata[1] = ((sri&0x01) << 7) | (audiotrack->channels<<3); if (strstr(track->codec_id, "SBR")) { sri = matroska_aac_sri(audiotrack->samplerate); extradata[2] = 0x56; extradata[3] = 0xE5; extradata[4] = 0x80 | (sri<<3); extradata_size = 5; } else { extradata_size = 2; } } else if (codec_id == CODEC_ID_TTA) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *) track; ByteIOContext b; extradata_size = 30; extradata = av_mallocz(extradata_size); if (extradata == NULL) return AVERROR(ENOMEM); init_put_byte(&b, extradata, extradata_size, 1, NULL, NULL, NULL, NULL); put_buffer(&b, "TTA1", 4); put_le16(&b, 1); put_le16(&b, audiotrack->channels); put_le16(&b, audiotrack->bitdepth); put_le32(&b, audiotrack->samplerate); put_le32(&b, matroska->ctx->duration * audiotrack->samplerate); } else if (codec_id == CODEC_ID_RV10 || codec_id == CODEC_ID_RV20 || codec_id == CODEC_ID_RV30 || codec_id == CODEC_ID_RV40) { extradata_offset = 26; track->codec_priv_size -= extradata_offset; } else if (codec_id == CODEC_ID_RA_144) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; audiotrack->samplerate = 8000; audiotrack->channels = 1; } else if (codec_id == CODEC_ID_RA_288 || codec_id == CODEC_ID_COOK || codec_id == CODEC_ID_ATRAC3) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; ByteIOContext b; init_put_byte(&b, track->codec_priv, track->codec_priv_size, 0, NULL, NULL, NULL, NULL); url_fskip(&b, 24); audiotrack->coded_framesize = get_be32(&b); url_fskip(&b, 12); audiotrack->sub_packet_h = get_be16(&b); audiotrack->frame_size = get_be16(&b); audiotrack->sub_packet_size = get_be16(&b); audiotrack->buf = av_malloc(audiotrack->frame_size * audiotrack->sub_packet_h); if (codec_id == CODEC_ID_RA_288) { audiotrack->block_align = audiotrack->coded_framesize; track->codec_priv_size = 0; } else { audiotrack->block_align = audiotrack->sub_packet_size; extradata_offset = 78; track->codec_priv_size -= extradata_offset; } } if (codec_id == CODEC_ID_NONE) { av_log(matroska->ctx, AV_LOG_INFO, "Unknown/unsupported CodecID %s.\n", track->codec_id); } track->stream_index = matroska->num_streams; matroska->num_streams++; st = av_new_stream(s, track->stream_index); if (st == NULL) return AVERROR(ENOMEM); av_set_pts_info(st, 64, matroska->time_scale*track->time_scale, 1000*1000*1000); /* 64 bit pts in ns */ st->codec->codec_id = codec_id; st->start_time = 0; if (strcmp(track->language, "und")) av_strlcpy(st->language, track->language, 4); if (track->flag_default) st->disposition |= AV_DISPOSITION_DEFAULT; if (track->default_duration) av_reduce(&st->codec->time_base.num, &st->codec->time_base.den, track->default_duration, 1000000000, 30000); if(extradata){ st->codec->extradata = extradata; st->codec->extradata_size = extradata_size; } else if(track->codec_priv && track->codec_priv_size > 0){ st->codec->extradata = av_malloc(track->codec_priv_size); if(st->codec->extradata == NULL) return AVERROR(ENOMEM); st->codec->extradata_size = track->codec_priv_size; memcpy(st->codec->extradata,track->codec_priv+extradata_offset, track->codec_priv_size); } if (track->type == MATROSKA_TRACK_TYPE_VIDEO) { MatroskaVideoTrack *videotrack = (MatroskaVideoTrack *)track; st->codec->codec_type = CODEC_TYPE_VIDEO; st->codec->codec_tag = videotrack->fourcc; st->codec->width = videotrack->pixel_width; st->codec->height = videotrack->pixel_height; if (videotrack->display_width == 0) videotrack->display_width= videotrack->pixel_width; if (videotrack->display_height == 0) videotrack->display_height= videotrack->pixel_height; av_reduce(&st->codec->sample_aspect_ratio.num, &st->codec->sample_aspect_ratio.den, st->codec->height * videotrack->display_width, st->codec-> width * videotrack->display_height, 255); st->need_parsing = AVSTREAM_PARSE_HEADERS; } else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; st->codec->codec_type = CODEC_TYPE_AUDIO; st->codec->sample_rate = audiotrack->samplerate; st->codec->channels = audiotrack->channels; st->codec->block_align = audiotrack->block_align; } else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) { st->codec->codec_type = CODEC_TYPE_SUBTITLE; } /* What do we do with private data? E.g. for Vorbis. */ } res = 0; } if (matroska->index_parsed) { int i, track, stream; for (i=0; inum_indexes; i++) { MatroskaDemuxIndex *idx = &matroska->index[i]; track = matroska_find_track_by_num(matroska, idx->track); if (track < 0) continue; stream = matroska->tracks[track]->stream_index; if (stream >= 0 && stream < matroska->ctx->nb_streams) av_add_index_entry(matroska->ctx->streams[stream], idx->pos, idx->time/AV_TIME_BASE, 0, 0, AVINDEX_KEYFRAME); } } return res; } static int matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size, int64_t pos, uint64_t cluster_time, uint64_t duration, int is_keyframe) { int res = 0; int track; AVStream *st; AVPacket *pkt; uint8_t *origdata = data; int16_t block_time; uint32_t *lace_size = NULL; int n, flags, laces = 0; uint64_t num; int stream_index; /* first byte(s): tracknum */ if ((n = matroska_ebmlnum_uint(data, size, &num)) < 0) { av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n"); av_free(origdata); return res; } data += n; size -= n; /* fetch track from num */ track = matroska_find_track_by_num(matroska, num); if (size <= 3 || track < 0 || track >= matroska->num_tracks) { av_log(matroska->ctx, AV_LOG_INFO, "Invalid stream %d or size %u\n", track, size); av_free(origdata); return res; } stream_index = matroska->tracks[track]->stream_index; if (stream_index < 0 || stream_index >= matroska->ctx->nb_streams) { av_free(origdata); return res; } st = matroska->ctx->streams[stream_index]; if (st->discard >= AVDISCARD_ALL) { av_free(origdata); return res; } if (duration == AV_NOPTS_VALUE) duration = matroska->tracks[track]->default_duration / matroska->time_scale; /* block_time (relative to cluster time) */ block_time = AV_RB16(data); data += 2; flags = *data++; size -= 3; if (is_keyframe == -1) is_keyframe = flags & 0x80 ? PKT_FLAG_KEY : 0; if (matroska->skip_to_keyframe) { if (!is_keyframe || st != matroska->skip_to_stream) { av_free(origdata); return res; } matroska->skip_to_keyframe = 0; } switch ((flags & 0x06) >> 1) { case 0x0: /* no lacing */ laces = 1; lace_size = av_mallocz(sizeof(int)); lace_size[0] = size; break; case 0x1: /* xiph lacing */ case 0x2: /* fixed-size lacing */ case 0x3: /* EBML lacing */ assert(size>0); // size <=3 is checked before size-=3 above laces = (*data) + 1; data += 1; size -= 1; lace_size = av_mallocz(laces * sizeof(int)); switch ((flags & 0x06) >> 1) { case 0x1: /* xiph lacing */ { uint8_t temp; uint32_t total = 0; for (n = 0; res == 0 && n < laces - 1; n++) { while (1) { if (size == 0) { res = -1; break; } temp = *data; lace_size[n] += temp; data += 1; size -= 1; if (temp != 0xff) break; } total += lace_size[n]; } lace_size[n] = size - total; break; } case 0x2: /* fixed-size lacing */ for (n = 0; n < laces; n++) lace_size[n] = size / laces; break; case 0x3: /* EBML lacing */ { uint32_t total; n = matroska_ebmlnum_uint(data, size, &num); if (n < 0) { av_log(matroska->ctx, AV_LOG_INFO, "EBML block data error\n"); break; } data += n; size -= n; total = lace_size[0] = num; for (n = 1; res == 0 && n < laces - 1; n++) { int64_t snum; int r; r = matroska_ebmlnum_sint (data, size, &snum); if (r < 0) { av_log(matroska->ctx, AV_LOG_INFO, "EBML block data error\n"); break; } data += r; size -= r; lace_size[n] = lace_size[n - 1] + snum; total += lace_size[n]; } lace_size[n] = size - total; break; } } break; } if (res == 0) { uint64_t timecode = AV_NOPTS_VALUE; if (cluster_time != (uint64_t)-1 && (block_time >= 0 || cluster_time >= -block_time)) timecode = cluster_time + block_time; for (n = 0; n < laces; n++) { if (st->codec->codec_id == CODEC_ID_RA_288 || st->codec->codec_id == CODEC_ID_COOK || st->codec->codec_id == CODEC_ID_ATRAC3) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)matroska->tracks[track]; int a = st->codec->block_align; int sps = audiotrack->sub_packet_size; int cfs = audiotrack->coded_framesize; int h = audiotrack->sub_packet_h; int y = audiotrack->sub_packet_cnt; int w = audiotrack->frame_size; int x; if (!audiotrack->pkt_cnt) { if (st->codec->codec_id == CODEC_ID_RA_288) for (x=0; xbuf+x*2*w+y*cfs, data+x*cfs, cfs); else for (x=0; xbuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), data+x*sps, sps); if (++audiotrack->sub_packet_cnt >= h) { audiotrack->sub_packet_cnt = 0; audiotrack->pkt_cnt = h*w / a; } } while (audiotrack->pkt_cnt) { pkt = av_mallocz(sizeof(AVPacket)); av_new_packet(pkt, a); memcpy(pkt->data, audiotrack->buf + a * (h*w / a - audiotrack->pkt_cnt--), a); pkt->pos = pos; pkt->stream_index = stream_index; matroska_queue_packet(matroska, pkt); } } else { int offset = 0, pkt_size = lace_size[n]; uint8_t *pkt_data = data; if (matroska->tracks[track]->encoding_scope & 1) { offset = matroska_decode_buffer(&pkt_data, &pkt_size, matroska->tracks[track]); if (offset < 0) continue; } pkt = av_mallocz(sizeof(AVPacket)); /* XXX: prevent data copy... */ if (av_new_packet(pkt, pkt_size+offset) < 0) { av_free(pkt); res = AVERROR(ENOMEM); n = laces-1; break; } if (offset) memcpy (pkt->data, matroska->tracks[track]->encoding_settings, offset); memcpy (pkt->data+offset, pkt_data, pkt_size); if (pkt_data != data) av_free(pkt_data); if (n == 0) pkt->flags = is_keyframe; pkt->stream_index = stream_index; pkt->pts = timecode; pkt->pos = pos; pkt->duration = duration; matroska_queue_packet(matroska, pkt); } if (timecode != AV_NOPTS_VALUE) timecode = duration ? timecode + duration : AV_NOPTS_VALUE; data += lace_size[n]; } } av_free(lace_size); av_free(origdata); return res; } static int matroska_parse_blockgroup (MatroskaDemuxContext *matroska, uint64_t cluster_time) { int res = 0; uint32_t id; int is_keyframe = PKT_FLAG_KEY, last_num_packets = matroska->num_packets; uint64_t duration = AV_NOPTS_VALUE; uint8_t *data; int size = 0; int64_t pos = 0; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing blockgroup...\n"); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* one block inside the group. Note, block parsing is one * of the harder things, so this code is a bit complicated. * See http://www.matroska.org/ for documentation. */ case MATROSKA_ID_BLOCK: { pos = url_ftell(matroska->ctx->pb); res = ebml_read_binary(matroska, &id, &data, &size); break; } case MATROSKA_ID_BLOCKDURATION: { if ((res = ebml_read_uint(matroska, &id, &duration)) < 0) break; break; } case MATROSKA_ID_BLOCKREFERENCE: { int64_t num; /* We've found a reference, so not even the first frame in * the lace is a key frame. */ is_keyframe = 0; if (last_num_packets != matroska->num_packets) matroska->packets[last_num_packets]->flags = 0; if ((res = ebml_read_sint(matroska, &id, &num)) < 0) break; break; } default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in blockgroup data\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (res) return res; if (size > 0) res = matroska_parse_block(matroska, data, size, pos, cluster_time, duration, is_keyframe); return res; } static int matroska_parse_cluster (MatroskaDemuxContext *matroska) { int res = 0; uint32_t id; uint64_t cluster_time = 0; uint8_t *data; int64_t pos; int size; av_log(matroska->ctx, AV_LOG_DEBUG, "parsing cluster at %"PRId64"\n", url_ftell(matroska->ctx->pb)); while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { res = AVERROR(EIO); break; } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { /* cluster timecode */ case MATROSKA_ID_CLUSTERTIMECODE: { uint64_t num; if ((res = ebml_read_uint(matroska, &id, &num)) < 0) break; cluster_time = num; break; } /* a group of blocks inside a cluster */ case MATROSKA_ID_BLOCKGROUP: if ((res = ebml_read_master(matroska, &id)) < 0) break; res = matroska_parse_blockgroup(matroska, cluster_time); break; case MATROSKA_ID_SIMPLEBLOCK: pos = url_ftell(matroska->ctx->pb); res = ebml_read_binary(matroska, &id, &data, &size); if (res == 0) res = matroska_parse_block(matroska, data, size, pos, cluster_time, AV_NOPTS_VALUE, -1); break; default: av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%x in cluster data\n", id); /* fall-through */ case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } return res; } static int matroska_read_packet (AVFormatContext *s, AVPacket *pkt) { MatroskaDemuxContext *matroska = s->priv_data; int res; uint32_t id; /* Read stream until we have a packet queued. */ while (matroska_deliver_packet(matroska, pkt)) { /* Have we already reached the end? */ if (matroska->done) return AVERROR(EIO); res = 0; while (res == 0) { if (!(id = ebml_peek_id(matroska, &matroska->level_up))) { return AVERROR(EIO); } else if (matroska->level_up) { matroska->level_up--; break; } switch (id) { case MATROSKA_ID_CLUSTER: if ((res = ebml_read_master(matroska, &id)) < 0) break; if ((res = matroska_parse_cluster(matroska)) == 0) res = 1; /* Parsed one cluster, let's get out. */ break; default: case EBML_ID_VOID: res = ebml_read_skip(matroska); break; } if (matroska->level_up) { matroska->level_up--; break; } } if (res == -1) matroska->done = 1; } return 0; } static int matroska_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags) { MatroskaDemuxContext *matroska = s->priv_data; AVStream *st = s->streams[stream_index]; int index; /* find index entry */ index = av_index_search_timestamp(st, timestamp, flags); if (index < 0) return 0; matroska_clear_queue(matroska); /* do the seek */ url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET); matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY); matroska->skip_to_stream = st; matroska->peek_id = 0; av_update_cur_dts(s, st, st->index_entries[index].timestamp); return 0; } static int matroska_read_close (AVFormatContext *s) { MatroskaDemuxContext *matroska = s->priv_data; int n = 0; av_free(matroska->index); matroska_clear_queue(matroska); for (n = 0; n < matroska->num_tracks; n++) { MatroskaTrack *track = matroska->tracks[n]; av_free(track->codec_id); av_free(track->codec_priv); av_free(track->name); if (track->type == MATROSKA_TRACK_TYPE_AUDIO) { MatroskaAudioTrack *audiotrack = (MatroskaAudioTrack *)track; av_free(audiotrack->buf); } av_free(track); } return 0; } AVInputFormat matroska_demuxer = { "matroska", NULL_IF_CONFIG_SMALL("Matroska file format"), sizeof(MatroskaDemuxContext), matroska_probe, matroska_read_header, matroska_read_packet, matroska_read_close, matroska_read_seek, };