uint64_t length;
} MatroskaLevel;
+typedef struct {
+ uint64_t timecode;
+ EbmlList blocks;
+} MatroskaCluster;
+
typedef struct {
AVFormatContext *ctx;
/* File has a CUES element, but we defer parsing until it is needed. */
int cues_parsing_deferred;
+
+ int current_cluster_num_blocks;
+ int64_t current_cluster_pos;
+ MatroskaCluster current_cluster;
+
+ /* File has SSA subtitles which prevent incremental cluster parsing. */
+ int contains_ssa;
} MatroskaDemuxContext;
typedef struct {
EbmlBin bin;
} MatroskaBlock;
-typedef struct {
- uint64_t timecode;
- EbmlList blocks;
-} MatroskaCluster;
-
static EbmlSyntax ebml_header[] = {
{ EBML_ID_EBMLREADVERSION, EBML_UINT, 0, offsetof(Ebml,version), {.u=EBML_VERSION} },
{ EBML_ID_EBMLMAXSIZELENGTH, EBML_UINT, 0, offsetof(Ebml,max_size), {.u=8} },
{ 0 }
};
+static EbmlSyntax matroska_cluster_incremental_parsing[] = {
+ { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
+ { MATROSKA_ID_BLOCKGROUP, EBML_NEST, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
+ { MATROSKA_ID_SIMPLEBLOCK, EBML_PASS, sizeof(MatroskaBlock), offsetof(MatroskaCluster,blocks), {.n=matroska_blockgroup} },
+ { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
+ { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
+ { MATROSKA_ID_INFO, EBML_NONE },
+ { MATROSKA_ID_CUES, EBML_NONE },
+ { MATROSKA_ID_TAGS, EBML_NONE },
+ { MATROSKA_ID_SEEKHEAD, EBML_NONE },
+ { MATROSKA_ID_CLUSTER, EBML_STOP },
+ { 0 }
+};
+
+static EbmlSyntax matroska_cluster_incremental[] = {
+ { MATROSKA_ID_CLUSTERTIMECODE,EBML_UINT,0, offsetof(MatroskaCluster,timecode) },
+ { MATROSKA_ID_BLOCKGROUP, EBML_STOP },
+ { MATROSKA_ID_SIMPLEBLOCK, EBML_STOP },
+ { MATROSKA_ID_CLUSTERPOSITION,EBML_NONE },
+ { MATROSKA_ID_CLUSTERPREVSIZE,EBML_NONE },
+ { 0 }
+};
+
+static EbmlSyntax matroska_clusters_incremental[] = {
+ { MATROSKA_ID_CLUSTER, EBML_NEST, 0, 0, {.n=matroska_cluster_incremental} },
+ { MATROSKA_ID_INFO, EBML_NONE },
+ { MATROSKA_ID_CUES, EBML_NONE },
+ { MATROSKA_ID_TAGS, EBML_NONE },
+ { MATROSKA_ID_SEEKHEAD, EBML_NONE },
+ { 0 }
+};
+
static const char *const matroska_doctypes[] = { "matroska", "webm" };
/*
av_log(matroska->ctx, AV_LOG_ERROR,
"Read error at pos. %"PRIu64" (0x%"PRIx64")\n",
pos, pos);
+ return pb->error ? pb->error : AVERROR(EIO);
}
- return AVERROR(EIO); /* EOS or actual I/O error */
+ return AVERROR_EOF;
}
/* get the length of the EBML number */
matroska->num_levels > 0 &&
matroska->levels[matroska->num_levels-1].length == 0xffffffffffffff)
return 0; // we reached the end of an unknown size cluster
- if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32)
+ if (!syntax[i].id && id != EBML_ID_VOID && id != EBML_ID_CRC32) {
av_log(matroska->ctx, AV_LOG_INFO, "Unknown entry 0x%X\n", id);
+ if (matroska->ctx->error_recognition & AV_EF_EXPLODE)
+ return AVERROR_INVALIDDATA;
+ }
return ebml_parse_elem(matroska, &syntax[i], data);
}
continue;
if (track->type == MATROSKA_TRACK_TYPE_VIDEO) {
- if (!track->default_duration)
+ if (!track->default_duration && track->video.frame_rate > 0)
track->default_duration = 1000000000/track->video.frame_rate;
if (!track->video.display_width)
track->video.display_width = track->video.pixel_width;
255);
if (st->codec->codec_id != CODEC_ID_H264)
st->need_parsing = AVSTREAM_PARSE_HEADERS;
- if (track->default_duration)
- st->avg_frame_rate = av_d2q(1000000000.0/track->default_duration, INT_MAX);
+ if (track->default_duration) {
+ av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
+ 1000000000, track->default_duration, 30000);
+ st->avg_frame_rate = st->r_frame_rate;
+ }
} else if (track->type == MATROSKA_TRACK_TYPE_AUDIO) {
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->sample_rate = track->audio.out_samplerate;
st->need_parsing = AVSTREAM_PARSE_HEADERS;
} else if (track->type == MATROSKA_TRACK_TYPE_SUBTITLE) {
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ if (st->codec->codec_id == CODEC_ID_SSA)
+ matroska->contains_ssa = 1;
}
}
matroska->packets = newpackets;
} else {
av_freep(&matroska->packets);
+ matroska->prev_pkt = NULL;
}
matroska->num_packets--;
return 0;
if ((n = matroska_ebmlnum_uint(matroska, data, size, &num)) < 0) {
av_log(matroska->ctx, AV_LOG_ERROR, "EBML block data error\n");
- return res;
+ return n;
}
data += n;
size -= n;
return res;
}
+static int matroska_parse_cluster_incremental(MatroskaDemuxContext *matroska)
+{
+ EbmlList *blocks_list;
+ MatroskaBlock *blocks;
+ int i, res;
+ res = ebml_parse(matroska,
+ matroska_cluster_incremental_parsing,
+ &matroska->current_cluster);
+ if (res == 1) {
+ /* New Cluster */
+ if (matroska->current_cluster_pos)
+ ebml_level_end(matroska);
+ ebml_free(matroska_cluster, &matroska->current_cluster);
+ memset(&matroska->current_cluster, 0, sizeof(MatroskaCluster));
+ matroska->current_cluster_num_blocks = 0;
+ matroska->current_cluster_pos = avio_tell(matroska->ctx->pb);
+ matroska->prev_pkt = NULL;
+ /* sizeof the ID which was already read */
+ if (matroska->current_id)
+ matroska->current_cluster_pos -= 4;
+ res = ebml_parse(matroska,
+ matroska_clusters_incremental,
+ &matroska->current_cluster);
+ /* Try parsing the block again. */
+ if (res == 1)
+ res = ebml_parse(matroska,
+ matroska_cluster_incremental_parsing,
+ &matroska->current_cluster);
+ }
+
+ if (!res &&
+ matroska->current_cluster_num_blocks <
+ matroska->current_cluster.blocks.nb_elem) {
+ blocks_list = &matroska->current_cluster.blocks;
+ blocks = blocks_list->elem;
+
+ matroska->current_cluster_num_blocks = blocks_list->nb_elem;
+ i = blocks_list->nb_elem - 1;
+ if (blocks[i].bin.size > 0 && blocks[i].bin.data) {
+ int is_keyframe = blocks[i].non_simple ? !blocks[i].reference : -1;
+ if (!blocks[i].non_simple)
+ blocks[i].duration = AV_NOPTS_VALUE;
+ res = matroska_parse_block(matroska,
+ blocks[i].bin.data, blocks[i].bin.size,
+ blocks[i].bin.pos,
+ matroska->current_cluster.timecode,
+ blocks[i].duration, is_keyframe,
+ matroska->current_cluster_pos);
+ }
+ }
+
+ if (res < 0) matroska->done = 1;
+ return res;
+}
+
static int matroska_parse_cluster(MatroskaDemuxContext *matroska)
{
MatroskaCluster cluster = { 0 };
EbmlList *blocks_list;
MatroskaBlock *blocks;
int i, res;
- int64_t pos = avio_tell(matroska->ctx->pb);
+ int64_t pos;
+ if (!matroska->contains_ssa)
+ return matroska_parse_cluster_incremental(matroska);
+ pos = avio_tell(matroska->ctx->pb);
matroska->prev_pkt = NULL;
if (matroska->current_id)
pos -= 4; /* sizeof the ID which was already read */
ret = matroska_parse_cluster(matroska);
}
+ if (ret == AVERROR_INVALIDDATA) {
+ pkt->flags |= AV_PKT_FLAG_CORRUPT;
+ return 0;
+ }
+
return ret;
}
avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
matroska->current_id = 0;
while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
+ matroska->prev_pkt = NULL;
matroska_clear_queue(matroska);
if (matroska_parse_cluster(matroska) < 0)
break;
for (n=0; n < matroska->tracks.nb_elem; n++)
if (tracks[n].type == MATROSKA_TRACK_TYPE_AUDIO)
av_free(tracks[n].audio.buf);
+ ebml_free(matroska_cluster, &matroska->current_cluster);
ebml_free(matroska_segment, matroska);
return 0;
projects / ffmpeg / blobdiff