Created
September 29, 2017 16:12
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bool arda::AudioStream::UpdateBuffers() | |
{ | |
auto& format_ctx = m_internals->format_ctx; | |
auto& avstream = m_internals->avstream; | |
auto& codec_ctx = m_internals->codec_ctx; | |
auto& codec = m_internals->codec; | |
auto& frame = m_internals->audioFrame; | |
auto& bufferchain = m_internals->bufferchain; | |
auto& source = m_internals->source; | |
auto& needsResample = m_internals->needsResample; | |
auto& resampler = m_internals->resampler; | |
auto& out_fmt = m_internals->out_fmt; | |
auto& cbuffer = m_internals->cbuffer; | |
int frameFinished; | |
AVPacket packet; | |
bool updatedColor = false, updatedAlpha = false; | |
ARDA_LOG("Update buffers"); | |
while (av_read_frame(format_ctx, &packet) >= 0) | |
{ | |
AVPacket decodingPacket = packet; | |
while(decodingPacket.size > 0) | |
{ | |
// Decode audio frame | |
int consumed = avcodec_decode_audio4(codec_ctx, frame, &frameFinished, &packet); | |
double pts = packet.pts; | |
double duration = frame->pkt_duration / static_cast<double>(AV_TIME_BASE); | |
int data_size = av_samples_get_buffer_size(NULL, codec_ctx->channels,frame->nb_samples, codec_ctx->sample_fmt, 1); | |
if (consumed>=0 && frameFinished) | |
{ | |
decodingPacket.size -= consumed; | |
decodingPacket.data += consumed; | |
uint8_t* data; | |
int linesize = 0; | |
//check if we must resample: | |
if (needsResample) | |
{ | |
av_samples_alloc(&data,NULL, 1, frame->nb_samples, out_fmt, 0); | |
int frame_count = swr_convert(resampler, &data, frame->nb_samples, (const uint8_t**)frame->data, frame->nb_samples); | |
data_size = av_samples_get_buffer_size(&linesize, m_channels, frame->nb_samples, out_fmt, 0); | |
} | |
else | |
{ | |
data = frame->data[0]; | |
} | |
//got a finished frame here | |
auto& buffer = bufferchain[cbuffer]; | |
buffer->Upload(data, data_size); | |
if (needsResample) | |
{ | |
//Crash here, data is a valid pointer at that time | |
av_freep(&data); | |
} | |
ALuint handle = buffer->GetHandle(); | |
alSourceQueueBuffers(source, 1, &handle); | |
Audio::checkErrorAl("Failed to query buffer to source"); | |
++cbuffer; | |
cbuffer %= 3; | |
} | |
else | |
{ | |
return false; | |
} | |
} | |
return true; | |
} | |
return false; | |
} |
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