/*
* FLV demuxer
- * Copyright (c) 2003 The FFmpeg Project.
+ * Copyright (c) 2003 The FFmpeg Project
+ *
+ * This demuxer will generate a 1 byte extradata for VP6F content.
+ * It is composed of:
+ * - upper 4bits: difference between encoded width and visible width
+ * - lower 4bits: difference between encoded height and visible height
*
* This file is part of FFmpeg.
*
* 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
- *
- *
- * This demuxer will generate a 1 byte extradata for VP6F content.
- * It is composed of:
- * - upper 4bits: difference between encoded width and visible width
- * - lower 4bits: difference between encoded height and visible height
*/
+
+#include "libavcodec/mpeg4audio.h"
#include "avformat.h"
#include "flv.h"
+typedef struct {
+ int wrong_dts; ///< wrong dts due to negative cts
+} FLVContext;
+
static int flv_probe(AVProbeData *p)
{
const uint8_t *d;
- if (p->buf_size < 6)
- return 0;
d = p->buf;
if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0) {
return AVPROBE_SCORE_MAX;
AVCodecContext *acodec = astream->codec;
switch(flv_codecid) {
//no distinction between S16 and S8 PCM codec flags
- case FLV_CODECID_PCM_BE:
- acodec->codec_id = acodec->bits_per_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16BE; break;
+ case FLV_CODECID_PCM:
+ acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_S8 :
+#ifdef WORDS_BIGENDIAN
+ CODEC_ID_PCM_S16BE;
+#else
+ CODEC_ID_PCM_S16LE;
+#endif
+ break;
case FLV_CODECID_PCM_LE:
- acodec->codec_id = acodec->bits_per_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16LE; break;
+ acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16LE; break;
+ case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
- case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = 1 ; break;
- case FLV_CODECID_NELLYMOSER_8HZ_MONO:
+ case FLV_CODECID_SPEEX:
+ acodec->codec_id = CODEC_ID_SPEEX;
+ acodec->sample_rate = 16000;
+ break;
+ case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
+ case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate
case FLV_CODECID_NELLYMOSER:
+ acodec->codec_id = CODEC_ID_NELLYMOSER;
+ break;
default:
av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
+ case FLV_CODECID_VP6A :
+ if(flv_codecid == FLV_CODECID_VP6A)
+ vcodec->codec_id = CODEC_ID_VP6A;
if(vcodec->extradata_size != 1) {
vcodec->extradata_size = 1;
vcodec->extradata = av_malloc(1);
}
- vcodec->extradata[0] = get_byte(&s->pb);
+ vcodec->extradata[0] = get_byte(s->pb);
return 1; // 1 byte body size adjustment for flv_read_packet()
+ case FLV_CODECID_H264:
+ vcodec->codec_id = CODEC_ID_H264;
+ return 3; // not 4, reading packet type will consume one byte
default:
av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
vcodec->codec_tag = flv_codecid;
return length;
}
-static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, unsigned int max_pos, int depth) {
+static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) {
AVCodecContext *acodec, *vcodec;
ByteIOContext *ioc;
AMFDataType amf_type;
double num_val;
num_val = 0;
- ioc = &s->pb;
+ ioc = s->pb;
amf_type = get_byte(ioc);
if(!strcmp(key, "stereo") && acodec) acodec->channels = num_val > 0 ? 2 : 1;
} else if(amf_type == AMF_DATA_TYPE_NUMBER) {
if(!strcmp(key, "duration")) s->duration = num_val * AV_TIME_BASE;
- else if(!strcmp(key, "width") && vcodec && num_val > 0) vcodec->width = num_val;
- else if(!strcmp(key, "height") && vcodec && num_val > 0) vcodec->height = num_val;
- else if(!strcmp(key, "audiocodecid") && acodec) flv_set_audio_codec(s, astream, (int)num_val << FLV_AUDIO_CODECID_OFFSET);
- else if(!strcmp(key, "videocodecid") && vcodec) flv_set_video_codec(s, vstream, (int)num_val);
- else if(!strcmp(key, "audiosamplesize") && acodec && num_val >= 0) {
- acodec->bits_per_sample = num_val;
+// else if(!strcmp(key, "width") && vcodec && num_val > 0) vcodec->width = num_val;
+// else if(!strcmp(key, "height") && vcodec && num_val > 0) vcodec->height = num_val;
+ else if(!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
+ vcodec->bit_rate = num_val * 1024.0;
+ else if(!strcmp(key, "audiocodecid") && acodec && 0 <= (int)num_val)
+ flv_set_audio_codec(s, astream, (int)num_val << FLV_AUDIO_CODECID_OFFSET);
+ else if(!strcmp(key, "videocodecid") && vcodec && 0 <= (int)num_val)
+ flv_set_video_codec(s, vstream, (int)num_val);
+ else if(!strcmp(key, "audiosamplesize") && acodec && 0 < (int)num_val) {
+ acodec->bits_per_coded_sample = num_val;
//we may have to rewrite a previously read codecid because FLV only marks PCM endianness.
if(num_val == 8 && (acodec->codec_id == CODEC_ID_PCM_S16BE || acodec->codec_id == CODEC_ID_PCM_S16LE))
acodec->codec_id = CODEC_ID_PCM_S8;
}
else if(!strcmp(key, "audiosamplerate") && acodec && num_val >= 0) {
//some tools, like FLVTool2, write consistently approximate metadata sample rates
- switch((int)num_val) {
- case 44000: acodec->sample_rate = 44100 ; break;
- case 22000: acodec->sample_rate = 22050 ; break;
- case 11000: acodec->sample_rate = 11025 ; break;
- case 5000 : acodec->sample_rate = 5512 ; break;
- default : acodec->sample_rate = num_val;
+ if (!acodec->sample_rate) {
+ switch((int)num_val) {
+ case 44000: acodec->sample_rate = 44100 ; break;
+ case 22000: acodec->sample_rate = 22050 ; break;
+ case 11000: acodec->sample_rate = 11025 ; break;
+ case 5000 : acodec->sample_rate = 5512 ; break;
+ default : acodec->sample_rate = num_val;
+ }
}
}
}
return 0;
}
-static int flv_read_metabody(AVFormatContext *s, unsigned int next_pos) {
+static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
AMFDataType type;
AVStream *stream, *astream, *vstream;
ByteIOContext *ioc;
- int i, keylen;
+ int i;
char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want.
astream = NULL;
vstream = NULL;
- keylen = 0;
- ioc = &s->pb;
+ ioc = s->pb;
//first object needs to be "onMetaData" string
type = get_byte(ioc);
return 0;
}
+static AVStream *create_stream(AVFormatContext *s, int is_audio){
+ AVStream *st = av_new_stream(s, is_audio);
+ if (!st)
+ return NULL;
+ st->codec->codec_type = is_audio ? CODEC_TYPE_AUDIO : CODEC_TYPE_VIDEO;
+ av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
+ return st;
+}
+
static int flv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
int offset, flags;
- AVStream *st;
- url_fskip(&s->pb, 4);
- flags = get_byte(&s->pb);
+ url_fskip(s->pb, 4);
+ flags = get_byte(s->pb);
+ /* old flvtool cleared this field */
+ /* FIXME: better fix needed */
+ if (!flags) {
+ flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO;
+ av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n");
+ }
+
+ if((flags & (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
+ != (FLV_HEADER_FLAG_HASVIDEO|FLV_HEADER_FLAG_HASAUDIO))
+ s->ctx_flags |= AVFMTCTX_NOHEADER;
if(flags & FLV_HEADER_FLAG_HASVIDEO){
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
- st->codec->codec_type = CODEC_TYPE_VIDEO;
- av_set_pts_info(st, 24, 1, 1000); /* 24 bit pts in ms */
+ if(!create_stream(s, 0))
+ return AVERROR(ENOMEM);
}
if(flags & FLV_HEADER_FLAG_HASAUDIO){
- st = av_new_stream(s, 1);
- if (!st)
- return AVERROR_NOMEM;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- av_set_pts_info(st, 24, 1, 1000); /* 24 bit pts in ms */
+ if(!create_stream(s, 1))
+ return AVERROR(ENOMEM);
}
- offset = get_be32(&s->pb);
- url_fseek(&s->pb, offset, SEEK_SET);
+ offset = get_be32(s->pb);
+ url_fseek(s->pb, offset, SEEK_SET);
s->start_time = 0;
return 0;
}
+static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
+{
+ av_free(st->codec->extradata);
+ st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ st->codec->extradata_size = size;
+ get_buffer(s->pb, st->codec->extradata, st->codec->extradata_size);
+ return 0;
+}
+
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
- int ret, i, type, size, pts, flags, is_audio, next, pos;
+ FLVContext *flv = s->priv_data;
+ int ret, i, type, size, flags, is_audio;
+ int64_t next, pos;
+ int64_t dts, pts = AV_NOPTS_VALUE;
AVStream *st = NULL;
for(;;){
- pos = url_ftell(&s->pb);
- url_fskip(&s->pb, 4); /* size of previous packet */
- type = get_byte(&s->pb);
- size = get_be24(&s->pb);
- pts = get_be24(&s->pb);
-// av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, pts:%d\n", type, size, pts);
- if (url_feof(&s->pb))
- return AVERROR_IO;
- url_fskip(&s->pb, 4); /* reserved */
+ pos = url_ftell(s->pb);
+ url_fskip(s->pb, 4); /* size of previous packet */
+ type = get_byte(s->pb);
+ size = get_be24(s->pb);
+ dts = get_be24(s->pb);
+ dts |= get_byte(s->pb) << 24;
+// av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, dts:%d\n", type, size, dts);
+ if (url_feof(s->pb))
+ return AVERROR_EOF;
+ url_fskip(s->pb, 3); /* stream id, always 0 */
flags = 0;
if(size == 0)
continue;
- next= size + url_ftell(&s->pb);
+ next= size + url_ftell(s->pb);
if (type == FLV_TAG_TYPE_AUDIO) {
is_audio=1;
- flags = get_byte(&s->pb);
+ flags = get_byte(s->pb);
+ size--;
} else if (type == FLV_TAG_TYPE_VIDEO) {
is_audio=0;
- flags = get_byte(&s->pb);
+ flags = get_byte(s->pb);
+ size--;
+ if ((flags & 0xf0) == 0x50) /* video info / command frame */
+ goto skip;
} else {
- if (type == FLV_TAG_TYPE_META && size > 13+1+4)
+ if (type == FLV_TAG_TYPE_META && size > 13+1+4 && 0)
flv_read_metabody(s, next);
else /* skip packet */
av_log(s, AV_LOG_ERROR, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
- url_fseek(&s->pb, next, SEEK_SET);
+ skip:
+ url_fseek(s->pb, next, SEEK_SET);
continue;
}
+ /* skip empty data packets */
+ if (!size)
+ continue;
+
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
break;
}
if(i == s->nb_streams){
- av_log(NULL, AV_LOG_ERROR, "invalid stream\n");
- url_fseek(&s->pb, next, SEEK_SET);
- continue;
+ av_log(s, AV_LOG_ERROR, "invalid stream\n");
+ st= create_stream(s, is_audio);
+ s->ctx_flags &= ~AVFMTCTX_NOHEADER;
}
-// av_log(NULL, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard);
+// av_log(s, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard);
if( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio))
||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
|| st->discard >= AVDISCARD_ALL
){
- url_fseek(&s->pb, next, SEEK_SET);
+ url_fseek(s->pb, next, SEEK_SET);
continue;
}
if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
- av_add_index_entry(st, pos, pts, size, 0, AVINDEX_KEYFRAME);
+ av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
break;
}
// if not streamed and no duration from metadata then seek to end to find the duration from the timestamps
- if(!url_is_streamed(&s->pb) && s->duration==AV_NOPTS_VALUE){
+ if(!url_is_streamed(s->pb) && s->duration==AV_NOPTS_VALUE){
int size;
- const int pos= url_ftell(&s->pb);
- const int fsize= url_fsize(&s->pb);
- url_fseek(&s->pb, fsize-4, SEEK_SET);
- size= get_be32(&s->pb);
- url_fseek(&s->pb, fsize-3-size, SEEK_SET);
- if(size == get_be24(&s->pb) + 11){
- s->duration= get_be24(&s->pb) * (int64_t)AV_TIME_BASE / 1000;
+ const int64_t pos= url_ftell(s->pb);
+ const int64_t fsize= url_fsize(s->pb);
+ url_fseek(s->pb, fsize-4, SEEK_SET);
+ size= get_be32(s->pb);
+ url_fseek(s->pb, fsize-3-size, SEEK_SET);
+ if(size == get_be24(s->pb) + 11){
+ s->duration= get_be24(s->pb) * (int64_t)AV_TIME_BASE / 1000;
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(s->pb, pos, SEEK_SET);
}
if(is_audio){
- if(!st->codec->sample_rate || !st->codec->bits_per_sample || (!st->codec->codec_id && !st->codec->codec_tag)) {
+ if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) {
st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
- if((flags & FLV_AUDIO_CODECID_MASK) == FLV_CODECID_NELLYMOSER_8HZ_MONO)
- st->codec->sample_rate= 8000;
- else
- st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
- st->codec->bits_per_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
+ st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
+ st->codec->bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
+ }
+ if(!st->codec->codec_id){
flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
}
}else{
size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
}
- ret= av_get_packet(&s->pb, pkt, size - 1);
- if (ret <= 0) {
- return AVERROR_IO;
+ if (st->codec->codec_id == CODEC_ID_AAC ||
+ st->codec->codec_id == CODEC_ID_H264) {
+ int type = get_byte(s->pb);
+ size--;
+ if (st->codec->codec_id == CODEC_ID_H264) {
+ int32_t cts = (get_be24(s->pb)+0xff800000)^0xff800000; // sign extension
+ pts = dts + cts;
+ if (cts < 0) { // dts are wrong
+ flv->wrong_dts = 1;
+ av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n");
+ }
+ if (flv->wrong_dts)
+ dts = AV_NOPTS_VALUE;
+ }
+ if (type == 0) {
+ if ((ret = flv_get_extradata(s, st, size)) < 0)
+ return ret;
+ if (st->codec->codec_id == CODEC_ID_AAC) {
+ MPEG4AudioConfig cfg;
+ ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
+ st->codec->extradata_size);
+ if (cfg.chan_config > 7)
+ return -1;
+ st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
+ st->codec->sample_rate = cfg.sample_rate;
+ dprintf(s, "mp4a config channels %d sample rate %d\n",
+ st->codec->channels, st->codec->sample_rate);
+ }
+
+ return AVERROR(EAGAIN);
+ }
+ }
+
+ /* skip empty data packets */
+ if (!size)
+ return AVERROR(EAGAIN);
+
+ ret= av_get_packet(s->pb, pkt, size);
+ if (ret < 0) {
+ return AVERROR(EIO);
}
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
- pkt->pts = pts;
+ pkt->dts = dts;
+ pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
pkt->stream_index = st->index;
if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY))
return ret;
}
-static int flv_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
-{
- AVStream *st = s->streams[stream_index];
- int index = av_index_search_timestamp(st, timestamp, flags);
- if (index < 0)
- return -1;
- url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET);
-
- return 0;
-}
-
AVInputFormat flv_demuxer = {
"flv",
- "flv format",
- 0,
+ NULL_IF_CONFIG_SMALL("FLV format"),
+ sizeof(FLVContext),
flv_probe,
flv_read_header,
flv_read_packet,
- flv_read_close,
- flv_read_seek,
.extensions = "flv",
.value = CODEC_ID_FLV1,
};
projects / frescor / ffmpeg.git / blobdiff