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driver/audiodec/ffmpegdec.cpp: add support to downmix and play multichannel audio,

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fix seek function,
use duration reported by ffmpeg if reported,
set analyzeduration to 1 second
This commit is contained in:
[CST] Focus
2013-12-10 17:24:47 +04:00
parent d69f8d507a
commit ecf0fb03a6
1 changed files with 26 additions and 6 deletions
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32
src/driver/audiodec/ffmpegdec.cpp
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@@ -49,6 +49,8 @@ extern "C" {
extern cAudio * audioDecoder;
//#define FFDEC_DEBUG
#define ProgName "FfmpegDec"
#define COVERDIR "/tmp/cover"
@@ -64,7 +66,7 @@ static void log_callback(void *, int, const char *format, va_list ap)
CFfmpegDec::CFfmpegDec(void)
{
av_log_set_callback(log_callback);
//av_log_set_callback(log_callback);
meta_data_valid = false;
buffer_size = 0x1000;
buffer = NULL;
@@ -90,6 +92,9 @@ static int read_packet(void *opaque, uint8_t *buf, int buf_size)
int64_t CFfmpegDec::Seek(int64_t offset, int whence)
{
if (whence == AVSEEK_SIZE)
return (int64_t) -1;
fseek((FILE *) in, (long) offset, whence);
return (int64_t) ftell((FILE *) in);
}
@@ -109,9 +114,10 @@ bool CFfmpegDec::Init(void *_in, const CFile::FileType ft)
type_info = "";
total_time = 0;
bitrate = 0;
total_time = 0;
#ifdef FFDEC_DEBUG
av_log_set_level(AV_LOG_DEBUG);
#endif
AVIOContext *avioc = NULL;
in = _in;
@@ -128,6 +134,8 @@ bool CFfmpegDec::Init(void *_in, const CFile::FileType ft)
if (is_stream)
avc->probesize = 128 * 1024;
av_opt_set_int(avc, "analyzeduration", 1000000, 0);
avioc = avio_alloc_context (buffer, buffer_size, 0, this, read_packet, NULL, seek_packet);
if (!avioc) {
av_freep(&buffer);
@@ -152,6 +160,9 @@ bool CFfmpegDec::Init(void *_in, const CFile::FileType ft)
case CFile::FILE_FLAC:
input_format = av_find_input_format("flac");
break;
case CFile::FILE_AAC:
input_format = av_find_input_format("aac");
break;
default:
break;
}
@@ -222,6 +233,7 @@ CBaseDec::RetCode CFfmpegDec::Decoder(FILE *_in, const CFile::FileType ft, int /
}
mSampleRate = samplerate;
mChannels = av_get_channel_layout_nb_channels(AV_CH_LAYOUT_STEREO);
#if __BYTE_ORDER == __LITTLE_ENDIAN
audioDecoder->PrepareClipPlay(mChannels, mSampleRate, 16, 1);
#else
@@ -233,7 +245,8 @@ CBaseDec::RetCode CFfmpegDec::Decoder(FILE *_in, const CFile::FileType ft, int /
av_init_packet(&rpacket);
av_opt_set_int(swr, "in_channel_layout", c->channel_layout, 0);
av_opt_set_int(swr, "out_channel_layout", c->channel_layout, 0);
//av_opt_set_int(swr, "out_channel_layout", c->channel_layout, 0);
av_opt_set_int(swr, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
av_opt_set_int(swr, "in_sample_rate", c->sample_rate, 0);
av_opt_set_int(swr, "out_sample_rate", c->sample_rate, 0);
av_opt_set_int(swr, "in_sample_fmt", c->sample_fmt, 0);
@@ -315,7 +328,7 @@ CBaseDec::RetCode CFfmpegDec::Decoder(FILE *_in, const CFile::FileType ft, int /
c->sample_rate, c->sample_rate, AV_ROUND_UP);
if (outsamples > outsamples_max) {
av_free(outbuf);
if (av_samples_alloc(&outbuf, &out_samples, c->channels,
if (av_samples_alloc(&outbuf, &out_samples, mChannels, //c->channels,
frame->nb_samples, AV_SAMPLE_FMT_S16, 1) < 0) {
Status=WRITE_ERR;
packet.size = 0;
@@ -325,7 +338,7 @@ CBaseDec::RetCode CFfmpegDec::Decoder(FILE *_in, const CFile::FileType ft, int /
}
outsamples = swr_convert(swr, &outbuf, outsamples,
(const uint8_t **) &frame->data[0], frame->nb_samples);
int outbuf_size = av_samples_get_buffer_size(&out_samples, c->channels,
int outbuf_size = av_samples_get_buffer_size(&out_samples, mChannels, //c->channels,
outsamples, AV_SAMPLE_FMT_S16, 1);
if(audioDecoder->WriteClip((unsigned char*) outbuf, outbuf_size) != outbuf_size)
@@ -403,7 +416,9 @@ bool CFfmpegDec::SetMetaData(FILE *_in, CFile::FileType ft, CAudioMetaData* m)
}
//fseek((FILE *) in, 0, SEEK_SET);
#ifdef FFDEC_DEBUG
av_dump_format(avc, 0, "", 0);
#endif
codec = NULL;
best_stream = av_find_best_stream(avc, AVMEDIA_TYPE_AUDIO, -1, -1, &codec, 0);
@@ -431,6 +446,11 @@ bool CFfmpegDec::SetMetaData(FILE *_in, CFile::FileType ft, CAudioMetaData* m)
bitrate = 0;
total_time = 0;
if (avc->duration != int64_t(AV_NOPTS_VALUE))
total_time = avc->duration / int64_t(AV_TIME_BASE);
printf("CFfmpegDec: format %s (%s) duration %ld\n", avc->iformat->name, type_info.c_str(), total_time);
for(unsigned int i = 0; i < avc->nb_streams; i++) {
if (avc->streams[i]->codec->bit_rate > 0)
bitrate += avc->streams[i]->codec->bit_rate;
@@ -448,7 +468,7 @@ bool CFfmpegDec::SetMetaData(FILE *_in, CFile::FileType ft, CAudioMetaData* m)
}
}
}
if(m->filesize && bitrate)
if(!total_time && m->filesize && bitrate)
total_time = 8 * m->filesize / bitrate;
meta_data_valid = true;