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Code Issues Releases Wiki Activity

Merge the stream struct into the parent decoder

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This commit is contained in:
Chris Robinson 2012-12-15 23:46:32 -08:00
parent 5fff1c4e47
commit 1a771ae671
2 changed files with 71 additions and 84 deletions
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142
apps/openmw/mwsound/ffmpeg_decoder.cpp
View file

@ -15,23 +15,6 @@ static void fail(const std::string &msg)
{ throw std::runtime_error("FFmpeg exception: "+msg); }
struct FFmpeg_Decoder::MyStream {
AVCodecContext *mCodecCtx;
int mStreamIdx;
AVPacket mPacket;
AVFrame *mFrame;
int mFrameSize;
int mFramePos;
FFmpeg_Decoder *mParent;
bool getAVAudioData();
size_t readAVAudioData(void *data, size_t length);
};
int FFmpeg_Decoder::readPacket(void *user_data, uint8_t *buf, int buf_size)
{
Ogre::DataStreamPtr stream = static_cast<FFmpeg_Decoder*>(user_data)->mDataStream;
@ -69,35 +52,36 @@ int64_t FFmpeg_Decoder::seek(void *user_data, int64_t offset, int whence)
* handle for. */
bool FFmpeg_Decoder::getNextPacket()
{
if(!mStream.get())
if(!mStream)
return false;
while(av_read_frame(mFormatCtx, &mStream->mPacket) >= 0)
int stream_idx = mStream - mFormatCtx->streams;
while(av_read_frame(mFormatCtx, &mPacket) >= 0)
{
/* Check if the packet belongs to this stream */
if(mStream->mStreamIdx == mStream->mPacket.stream_index)
if(stream_idx == mPacket.stream_index)
return true;
/* Free the packet and look for another */
av_free_packet(&mStream->mPacket);
av_free_packet(&mPacket);
}
return false;
}
bool FFmpeg_Decoder::MyStream::getAVAudioData()
bool FFmpeg_Decoder::getAVAudioData()
{
int got_frame, len;
if(mCodecCtx->codec_type != AVMEDIA_TYPE_AUDIO)
if((*mStream)->codec->codec_type != AVMEDIA_TYPE_AUDIO)
return false;
do {
if(mPacket.size == 0 && !mParent->getNextPacket())
if(mPacket.size == 0 && !getNextPacket())
return false;
/* Decode some data, and check for errors */
if((len=avcodec_decode_audio4(mCodecCtx, mFrame, &got_frame, &mPacket)) < 0)
if((len=avcodec_decode_audio4((*mStream)->codec, mFrame, &got_frame, &mPacket)) < 0)
return false;
/* Move the unread data to the front and clear the end bits */
@ -114,7 +98,7 @@ bool FFmpeg_Decoder::MyStream::getAVAudioData()
return true;
}
size_t FFmpeg_Decoder::MyStream::readAVAudioData(void *data, size_t length)
size_t FFmpeg_Decoder::readAVAudioData(void *data, size_t length)
{
size_t dec = 0;
@ -126,8 +110,8 @@ size_t FFmpeg_Decoder::MyStream::readAVAudioData(void *data, size_t length)
if(!getAVAudioData())
break;
mFramePos = 0;
mFrameSize = mFrame->nb_samples * mCodecCtx->channels *
av_get_bytes_per_sample(mCodecCtx->sample_fmt);
mFrameSize = mFrame->nb_samples * (*mStream)->codec->channels *
av_get_bytes_per_sample((*mStream)->codec->sample_fmt);
}
/* Get the amount of bytes remaining to be written, and clamp to
@ -167,55 +151,46 @@ void FFmpeg_Decoder::open(const std::string &fname)
if(avformat_find_stream_info(mFormatCtx, NULL) < 0)
fail("Failed to find stream info in "+fname);
int audio_idx = -1;
for(size_t j = 0;j < mFormatCtx->nb_streams;j++)
{
if(mFormatCtx->streams[j]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
{
audio_idx = j;
mStream = &mFormatCtx->streams[j];
break;
}
}
if(audio_idx == -1)
if(!mStream)
fail("No audio streams in "+fname);
std::auto_ptr<MyStream> stream(new MyStream);
stream->mCodecCtx = mFormatCtx->streams[audio_idx]->codec;
stream->mStreamIdx = audio_idx;
memset(&stream->mPacket, 0, sizeof(stream->mPacket));
memset(&mPacket, 0, sizeof(mPacket));
AVCodec *codec = avcodec_find_decoder(stream->mCodecCtx->codec_id);
AVCodec *codec = avcodec_find_decoder((*mStream)->codec->codec_id);
if(!codec)
{
std::stringstream ss("No codec found for id ");
ss << stream->mCodecCtx->codec_id;
ss << (*mStream)->codec->codec_id;
fail(ss.str());
}
if(avcodec_open2(stream->mCodecCtx, codec, NULL) < 0)
if(avcodec_open2((*mStream)->codec, codec, NULL) < 0)
fail("Failed to open audio codec " + std::string(codec->long_name));
stream->mFrame = avcodec_alloc_frame();
stream->mParent = this;
mStream = stream;
mFrame = avcodec_alloc_frame();
}
catch(std::exception &e)
{
avformat_close_input(&mFormatCtx);
mFormatCtx = NULL;
throw;
}
}
void FFmpeg_Decoder::close()
{
if(mStream.get())
{
av_free_packet(&mStream->mPacket);
avcodec_close(mStream->mCodecCtx);
av_free(mStream->mFrame);
}
mStream.reset();
if(mStream)
avcodec_close((*mStream)->codec);
mStream = NULL;
av_free_packet(&mPacket);
av_freep(&mFrame);
if(mFormatCtx)
{
@ -223,7 +198,6 @@ void FFmpeg_Decoder::close()
avformat_close_input(&mFormatCtx);
av_free(context);
}
mFormatCtx = NULL;
mDataStream.setNull();
}
@ -235,83 +209,82 @@ std::string FFmpeg_Decoder::getName()
void FFmpeg_Decoder::getInfo(int *samplerate, ChannelConfig *chans, SampleType *type)
{
if(!mStream.get())
if(!mStream)
fail("No audio stream info");
if(mStream->mCodecCtx->sample_fmt == AV_SAMPLE_FMT_U8)
if((*mStream)->codec->sample_fmt == AV_SAMPLE_FMT_U8)
*type = SampleType_UInt8;
else if(mStream->mCodecCtx->sample_fmt == AV_SAMPLE_FMT_S16)
else if((*mStream)->codec->sample_fmt == AV_SAMPLE_FMT_S16)
*type = SampleType_Int16;
else
fail(std::string("Unsupported sample format: ")+
av_get_sample_fmt_name(mStream->mCodecCtx->sample_fmt));
av_get_sample_fmt_name((*mStream)->codec->sample_fmt));
if(mStream->mCodecCtx->channel_layout == AV_CH_LAYOUT_MONO)
if((*mStream)->codec->channel_layout == AV_CH_LAYOUT_MONO)
*chans = ChannelConfig_Mono;
else if(mStream->mCodecCtx->channel_layout == AV_CH_LAYOUT_STEREO)
else if((*mStream)->codec->channel_layout == AV_CH_LAYOUT_STEREO)
*chans = ChannelConfig_Stereo;
else if(mStream->mCodecCtx->channel_layout == AV_CH_LAYOUT_QUAD)
else if((*mStream)->codec->channel_layout == AV_CH_LAYOUT_QUAD)
*chans = ChannelConfig_Quad;
else if(mStream->mCodecCtx->channel_layout == AV_CH_LAYOUT_5POINT1)
else if((*mStream)->codec->channel_layout == AV_CH_LAYOUT_5POINT1)
*chans = ChannelConfig_5point1;
else if(mStream->mCodecCtx->channel_layout == AV_CH_LAYOUT_7POINT1)
else if((*mStream)->codec->channel_layout == AV_CH_LAYOUT_7POINT1)
*chans = ChannelConfig_7point1;
else if(mStream->mCodecCtx->channel_layout == 0)
else if((*mStream)->codec->channel_layout == 0)
{
/* Unknown channel layout. Try to guess. */
if(mStream->mCodecCtx->channels == 1)
if((*mStream)->codec->channels == 1)
*chans = ChannelConfig_Mono;
else if(mStream->mCodecCtx->channels == 2)
else if((*mStream)->codec->channels == 2)
*chans = ChannelConfig_Stereo;
else
{
std::stringstream sstr("Unsupported raw channel count: ");
sstr << mStream->mCodecCtx->channels;
sstr << (*mStream)->codec->channels;
fail(sstr.str());
}
}
else
{
char str[1024];
av_get_channel_layout_string(str, sizeof(str), mStream->mCodecCtx->channels,
mStream->mCodecCtx->channel_layout);
av_get_channel_layout_string(str, sizeof(str), (*mStream)->codec->channels,
(*mStream)->codec->channel_layout);
fail(std::string("Unsupported channel layout: ")+str);
}
*samplerate = mStream->mCodecCtx->sample_rate;
*samplerate = (*mStream)->codec->sample_rate;
}
size_t FFmpeg_Decoder::read(char *buffer, size_t bytes)
{
if(!mStream.get())
if(!mStream)
fail("No audio stream");
size_t got = mStream->readAVAudioData(buffer, bytes);
mSamplesRead += got / mStream->mCodecCtx->channels /
av_get_bytes_per_sample(mStream->mCodecCtx->sample_fmt);
size_t got = readAVAudioData(buffer, bytes);
mSamplesRead += got / (*mStream)->codec->channels /
av_get_bytes_per_sample((*mStream)->codec->sample_fmt);
return got;
}
void FFmpeg_Decoder::readAll(std::vector<char> &output)
{
if(!mStream.get())
if(!mStream)
fail("No audio stream");
while(mStream->getAVAudioData())
while(getAVAudioData())
{
size_t got = mStream->mFrame->nb_samples * mStream->mCodecCtx->channels *
av_get_bytes_per_sample(mStream->mCodecCtx->sample_fmt);
const char *inbuf = reinterpret_cast<char*>(mStream->mFrame->data[0]);
size_t got = mFrame->nb_samples * (*mStream)->codec->channels *
av_get_bytes_per_sample((*mStream)->codec->sample_fmt);
const char *inbuf = reinterpret_cast<char*>(mFrame->data[0]);
output.insert(output.end(), inbuf, inbuf+got);
mSamplesRead += mStream->mFrame->nb_samples;
mSamplesRead += mFrame->nb_samples;
}
}
void FFmpeg_Decoder::rewind()
{
av_seek_frame(mFormatCtx, -1, 0, 0);
if(mStream.get())
av_free_packet(&mStream->mPacket);
av_free_packet(&mPacket);
mSamplesRead = 0;
}
@ -320,12 +293,19 @@ size_t FFmpeg_Decoder::getSampleOffset()
return mSamplesRead;
}
FFmpeg_Decoder::FFmpeg_Decoder() : mFormatCtx(NULL), mSamplesRead(0)
FFmpeg_Decoder::FFmpeg_Decoder()
: mFormatCtx(NULL)
, mStream(NULL)
, mFrame(NULL)
, mFrameSize(0)
, mFramePos(0)
, mSamplesRead(0)
{
static bool done_init = false;
memset(&mPacket, 0, sizeof(mPacket));
/* We need to make sure ffmpeg is initialized. Optionally silence warning
* output from the lib */
static bool done_init = false;
if(!done_init)
{
av_register_all();

13
apps/openmw/mwsound/ffmpeg_decoder.hpp
View file

@ -21,11 +21,15 @@ namespace MWSound
{
class FFmpeg_Decoder : public Sound_Decoder
{
struct MyStream;
AVFormatContext *mFormatCtx;
AVStream **mStream;
AVPacket mPacket;
AVFrame *mFrame;
int mFrameSize;
int mFramePos;
std::auto_ptr<MyStream> mStream;
size_t mSamplesRead;
bool getNextPacket();
@ -35,6 +39,9 @@ namespace MWSound
static int writePacket(void *user_data, uint8_t *buf, int buf_size);
static int64_t seek(void *user_data, int64_t offset, int whence);
bool getAVAudioData();
size_t readAVAudioData(void *data, size_t length);
virtual void open(const std::string &fname);
virtual void close();