diff options
author | Luca Barbato <lu_zero@gentoo.org> | 2012-05-10 01:35:58 +0400 |
---|---|---|
committer | Luca Barbato <lu_zero@gentoo.org> | 2012-06-03 05:36:01 +0400 |
commit | 21e2dc9fb76bc34fcdedf32e4ce820d6cdf923fb (patch) | |
tree | 5a85e6d90304b8251904eddb10fdd7b6aa76c6ce /libavformat/flvdec.c | |
parent | 2439bd86817374362ac8daa701fdb567e14cbe50 (diff) |
flv: support stream text data as onTextData
Adobe specifies onTextData as the standard message to use to deliver
text information.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavformat/flvdec.c')
-rw-r--r-- | libavformat/flvdec.c | 106 |
1 files changed, 91 insertions, 15 deletions
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index b9d65a645b..f04f4fec25 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -66,6 +66,17 @@ static int flv_probe(AVProbeData *p) return 0; } +static AVStream *create_stream(AVFormatContext *s, int tag, int codec_type) +{ + AVStream *st = avformat_new_stream(s, NULL); + if (!st) + return NULL; + st->id = tag; + st->codec->codec_type = codec_type; + avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ + return st; +} + static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) { switch(flv_codecid) { //no distinction between S16 and S8 PCM codec flags @@ -302,6 +313,12 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst vcodec->bit_rate = num_val * 1024.0; else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0)) acodec->bit_rate = num_val * 1024.0; + else if (!strcmp(key, "datastream")) { + AVStream *st = create_stream(s, 2, AVMEDIA_TYPE_DATA); + if (!st) + return AVERROR(ENOMEM); + st->codec->codec_id = CODEC_ID_TEXT; + } } if (!strcmp(key, "duration") || @@ -344,7 +361,14 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) { //first object needs to be "onMetaData" string type = avio_r8(ioc); - if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || strcmp(buffer, "onMetaData")) + if (type != AMF_DATA_TYPE_STRING || + amf_get_string(ioc, buffer, sizeof(buffer)) < 0) + return -1; + + if (!strcmp(buffer, "onTextData")) + return 1; + + if (strcmp(buffer, "onMetaData")) return -1; //find the streams now so that amf_parse_object doesn't need to do the lookup every time it is called. @@ -361,16 +385,6 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) { return 0; } -static AVStream *create_stream(AVFormatContext *s, int is_audio){ - AVStream *st = avformat_new_stream(s, NULL); - if (!st) - return NULL; - st->id = is_audio; - st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO; - avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ - return st; -} - static int flv_read_header(AVFormatContext *s) { int offset, flags; @@ -389,11 +403,11 @@ static int flv_read_header(AVFormatContext *s) s->ctx_flags |= AVFMTCTX_NOHEADER; if(flags & FLV_HEADER_FLAG_HASVIDEO){ - if(!create_stream(s, 0)) + if(!create_stream(s, 0, AVMEDIA_TYPE_VIDEO)) return AVERROR(ENOMEM); } if(flags & FLV_HEADER_FLAG_HASAUDIO){ - if(!create_stream(s, 1)) + if(!create_stream(s, 1, AVMEDIA_TYPE_AUDIO)) return AVERROR(ENOMEM); } @@ -453,6 +467,65 @@ static void clear_index_entries(AVFormatContext *s, int64_t pos) } } + +static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, + int64_t dts, int64_t next) +{ + int ret = AVERROR_INVALIDDATA, i; + AVIOContext *pb = s->pb; + AVStream *st = NULL; + AMFDataType type; + char buf[20]; + int length; + + type = avio_r8(pb); + if (type == AMF_DATA_TYPE_MIXEDARRAY) + avio_seek(pb, 4, SEEK_CUR); + else if (type != AMF_DATA_TYPE_OBJECT) + goto out; + + amf_get_string(pb, buf, sizeof(buf)); + if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING) + goto out; + + amf_get_string(pb, buf, sizeof(buf)); + //FIXME parse it as codec_id + amf_get_string(pb, buf, sizeof(buf)); + if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING) + goto out; + + length = avio_rb16(pb); + ret = av_get_packet(s->pb, pkt, length); + if (ret < 0) { + ret = AVERROR(EIO); + goto out; + } + + for (i = 0; i < s->nb_streams; i++) { + st = s->streams[i]; + if (st->id == 2) + break; + } + + if (i == s->nb_streams) { + st = create_stream(s, 2, AVMEDIA_TYPE_DATA); + if (!st) + goto out; + st->codec->codec_id = CODEC_ID_TEXT; + } + + pkt->dts = dts; + pkt->pts = dts; + pkt->size = ret; + + pkt->stream_index = st->index; + pkt->flags |= AV_PKT_FLAG_KEY; + + avio_seek(s->pb, next + 4, SEEK_SET); +out: + return ret; +} + static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) { FLVContext *flv = s->priv_data; @@ -507,7 +580,9 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) goto skip; } else { if (type == FLV_TAG_TYPE_META && size > 13+1+4) - flv_read_metabody(s, next); + if (flv_read_metabody(s, next) > 0) { + return flv_data_packet(s, pkt, dts, next); + } else /* skip packet */ av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags); skip: @@ -527,7 +602,8 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) } if(i == s->nb_streams){ av_log(s, AV_LOG_ERROR, "invalid stream\n"); - st= create_stream(s, is_audio); + st = create_stream(s, is_audio, + is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO); s->ctx_flags &= ~AVFMTCTX_NOHEADER; } av_dlog(s, "%d %X %d \n", is_audio, flags, st->discard); |