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ffmpeg.wasm-core
Commit 4d0cd5f5 authored by Andrew Stone's avatar Andrew Stone Committed by Anton Khirnov
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flvenc: move metadata updates into a single function 

Signed-off-by: 's avatarAnton Khirnov <anton@khirnov.net>
parent 8b573ddd
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Showing with 103 additions and 90 deletions
libavformat/flvenc.c
View file @ 4d0cd5f5
......@@ -60,6 +60,11 @@ typedef struct FLVContext {
int64_t filesize_offset;
int64_t duration;
int64_t delay; ///< first dts delay (needed for AVC & Speex)
AVCodecContext *audio_enc;
AVCodecContext *video_enc;
double framerate;
AVCodecContext *data_enc;
} FLVContext;
typedef struct FLVStreamContext {
......@@ -187,85 +192,14 @@ static void put_amf_bool(AVIOContext *pb, int b)
avio_w8(pb, !!b);
}
static int flv_write_header(AVFormatContext *s)
static void write_metadata(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
AVCodecContext *audio_enc = NULL, *video_enc = NULL, *data_enc = NULL;
int i, metadata_count = 0;
double framerate = 0.0;
int64_t metadata_size_pos, data_size, metadata_count_pos;
AVDictionaryEntry *tag = NULL;
for (i = 0; i < s->nb_streams; i++) {
AVCodecContext *enc = s->streams[i]->codec;
FLVStreamContext *sc;
switch (enc->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (s->streams[i]->avg_frame_rate.den &&
s->streams[i]->avg_frame_rate.num) {
framerate = av_q2d(s->streams[i]->avg_frame_rate);
}
if (video_enc) {
av_log(s, AV_LOG_ERROR,
"at most one video stream is supported in flv\n");
return AVERROR(EINVAL);
}
video_enc = enc;
if (enc->codec_tag == 0) {
av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n");
return -1;
}
break;
case AVMEDIA_TYPE_AUDIO:
if (audio_enc) {
av_log(s, AV_LOG_ERROR,
"at most one audio stream is supported in flv\n");
return AVERROR(EINVAL);
}
audio_enc = enc;
if (get_audio_flags(s, enc) < 0)
return AVERROR_INVALIDDATA;
break;
case AVMEDIA_TYPE_DATA:
if (enc->codec_id != AV_CODEC_ID_TEXT) {
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
return AVERROR_INVALIDDATA;
}
data_enc = enc;
break;
default:
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
return -1;
}
avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
sc = av_mallocz(sizeof(FLVStreamContext));
if (!sc)
return AVERROR(ENOMEM);
s->streams[i]->priv_data = sc;
sc->last_ts = -1;
}
flv->delay = AV_NOPTS_VALUE;
avio_write(pb, "FLV", 3);
avio_w8(pb, 1);
avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!audio_enc +
FLV_HEADER_FLAG_HASVIDEO * !!video_enc);
avio_wb32(pb, 9);
avio_wb32(pb, 0);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codec->codec_tag == 5) {
avio_w8(pb, 8); // message type
avio_wb24(pb, 0); // include flags
avio_wb24(pb, 0); // time stamp
avio_wb32(pb, 0); // reserved
avio_wb32(pb, 11); // size
flv->reserved = 5;
}
/* write meta_tag */
avio_w8(pb, 18); // tag type META
metadata_size_pos = avio_tell(pb);
......@@ -282,57 +216,57 @@ static int flv_write_header(AVFormatContext *s)
/* mixed array (hash) with size and string/type/data tuples */
avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY);
metadata_count_pos = avio_tell(pb);
metadata_count = 4 * !!video_enc +
5 * !!audio_enc +
1 * !!data_enc +
metadata_count = 4 * !!flv->video_enc +
5 * !!flv->audio_enc +
1 * !!flv->data_enc +
2; // +2 for duration and file size
avio_wb32(pb, metadata_count);
put_amf_string(pb, "duration");
flv->duration_offset= avio_tell(pb);
flv->duration_offset = avio_tell(pb);
// fill in the guessed duration, it'll be corrected later if incorrect
put_amf_double(pb, s->duration / AV_TIME_BASE);
if (video_enc) {
if (flv->video_enc) {
put_amf_string(pb, "width");
put_amf_double(pb, video_enc->width);
put_amf_double(pb, flv->video_enc->width);
put_amf_string(pb, "height");
put_amf_double(pb, video_enc->height);
put_amf_double(pb, flv->video_enc->height);
put_amf_string(pb, "videodatarate");
put_amf_double(pb, video_enc->bit_rate / 1024.0);
put_amf_double(pb, flv->video_enc->bit_rate / 1024.0);
if (framerate != 0.0) {
if (flv->framerate != 0.0) {
put_amf_string(pb, "framerate");
put_amf_double(pb, framerate);
put_amf_double(pb, flv->framerate);
metadata_count++;
}
put_amf_string(pb, "videocodecid");
put_amf_double(pb, video_enc->codec_tag);
put_amf_double(pb, flv->video_enc->codec_tag);
}
if (audio_enc) {
if (flv->audio_enc) {
put_amf_string(pb, "audiodatarate");
put_amf_double(pb, audio_enc->bit_rate / 1024.0);
put_amf_double(pb, flv->audio_enc->bit_rate / 1024.0);
put_amf_string(pb, "audiosamplerate");
put_amf_double(pb, audio_enc->sample_rate);
put_amf_double(pb, flv->audio_enc->sample_rate);
put_amf_string(pb, "audiosamplesize");
put_amf_double(pb, audio_enc->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
put_amf_double(pb, flv->audio_enc->codec_id == AV_CODEC_ID_PCM_U8 ? 8 : 16);
put_amf_string(pb, "stereo");
put_amf_bool(pb, audio_enc->channels == 2);
put_amf_bool(pb, flv->audio_enc->channels == 2);
put_amf_string(pb, "audiocodecid");
put_amf_double(pb, audio_enc->codec_tag);
put_amf_double(pb, flv->audio_enc->codec_tag);
}
if (data_enc) {
if (flv->data_enc) {
put_amf_string(pb, "datastream");
put_amf_double(pb, 0.0);
}
......@@ -361,6 +295,85 @@ static int flv_write_header(AVFormatContext *s)
avio_wb24(pb, data_size);
avio_skip(pb, data_size + 10 - 3);
avio_wb32(pb, data_size + 11);
}
static int flv_write_header(AVFormatContext *s)
{
int i;
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
int64_t data_size;
for (i = 0; i < s->nb_streams; i++) {
AVCodecContext *enc = s->streams[i]->codec;
FLVStreamContext *sc;
switch (enc->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (s->streams[i]->avg_frame_rate.den &&
s->streams[i]->avg_frame_rate.num) {
flv->framerate = av_q2d(s->streams[i]->avg_frame_rate);
}
if (flv->video_enc) {
av_log(s, AV_LOG_ERROR,
"at most one video stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->video_enc = enc;
if (enc->codec_tag == 0) {
av_log(s, AV_LOG_ERROR, "video codec not compatible with flv\n");
return -1;
}
break;
case AVMEDIA_TYPE_AUDIO:
if (flv->audio_enc) {
av_log(s, AV_LOG_ERROR,
"at most one audio stream is supported in flv\n");
return AVERROR(EINVAL);
}
flv->audio_enc = enc;
if (get_audio_flags(s, enc) < 0)
return AVERROR_INVALIDDATA;
break;
case AVMEDIA_TYPE_DATA:
if (enc->codec_id != AV_CODEC_ID_TEXT) {
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
return AVERROR_INVALIDDATA;
}
flv->data_enc = enc;
break;
default:
av_log(s, AV_LOG_ERROR, "codec not compatible with flv\n");
return -1;
}
avpriv_set_pts_info(s->streams[i], 32, 1, 1000); /* 32 bit pts in ms */
sc = av_mallocz(sizeof(FLVStreamContext));
if (!sc)
return AVERROR(ENOMEM);
s->streams[i]->priv_data = sc;
sc->last_ts = -1;
}
flv->delay = AV_NOPTS_VALUE;
avio_write(pb, "FLV", 3);
avio_w8(pb, 1);
avio_w8(pb, FLV_HEADER_FLAG_HASAUDIO * !!flv->audio_enc +
FLV_HEADER_FLAG_HASVIDEO * !!flv->video_enc);
avio_wb32(pb, 9);
avio_wb32(pb, 0);
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->codec->codec_tag == 5) {
avio_w8(pb, 8); // message type
avio_wb24(pb, 0); // include flags
avio_wb24(pb, 0); // time stamp
avio_wb32(pb, 0); // reserved
avio_wb32(pb, 11); // size
flv->reserved = 5;
}
write_metadata(s);
for (i = 0; i < s->nb_streams; i++) {
AVCodecContext *enc = s->streams[i]->codec;
......
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