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DATV demod: use just ffmpeg buffer for audio

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This commit is contained in:
f4exb 2021-03-21 21:05:09 +01:00
parent a04605f6ca
commit debc5c74f1
1 changed files with 25 additions and 26 deletions
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51
plugins/channelrx/demoddatv/datvideorender.cpp
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@ -651,45 +651,44 @@ bool DATVideoRender::RenderStream()
if (gotFrame)
{
int16_t *audioBuffer;
int16_t *audioBuffer = nullptr;
av_samples_alloc((uint8_t**) &audioBuffer, nullptr, 2, m_frame->nb_samples, AV_SAMPLE_FMT_S16, 0);
int frame_count = swr_convert(m_audioSWR, (uint8_t**) &audioBuffer, m_frame->nb_samples, (const uint8_t**) m_frame->data, m_frame->nb_samples);
int samples_per_channel = swr_convert(m_audioSWR, (uint8_t**) &audioBuffer, m_frame->nb_samples, (const uint8_t**) m_frame->data, m_frame->nb_samples);
if (samples_per_channel < m_frame->nb_samples) {
qDebug("DATVideoRender::RenderStream: converted samples missing %d/%d returned", samples_per_channel, m_frame->nb_samples);
}
// direct writing:
// int ret = m_audioFifo->write((const quint8*) &audioBuffer[0], frame_count);
// if (ret < frame_count) {
// qDebug("DATVideoRender::RenderStream: audio frames missing %d vs %d", ret, frame_count);
// }
std::for_each(audioBuffer, audioBuffer + 2*samples_per_channel, [this](int16_t &x) {
x *= m_audioVolume;
});
int ret = m_audioFifo->write((const quint8*) &audioBuffer[0], samples_per_channel);
if (ret < samples_per_channel) {
qDebug("DATVideoRender::RenderStream: audio samples missing %d/%d written", ret, samples_per_channel);
}
// buffered writing:
// if (m_audioFifoBufferIndex + frame_count < m_audioFifoBufferSize)
// if (m_audioFifoBufferIndex + samples_per_channel < m_audioFifoBufferSize)
// {
// std::copy(&audioBuffer[0], &audioBuffer[2*frame_count], &m_audioFifoBuffer[2*m_audioFifoBufferIndex]);
// m_audioFifoBufferIndex += frame_count;
// std::copy(&audioBuffer[0], &audioBuffer[2*samples_per_channel], &m_audioFifoBuffer[2*m_audioFifoBufferIndex]);
// m_audioFifoBufferIndex += samples_per_channel;
// }
// else
// {
// int remainder = m_audioFifoBufferSize - m_audioFifoBufferIndex;
// std::copy(&audioBuffer[0], &audioBuffer[2*remainder], &m_audioFifoBuffer[2*m_audioFifoBufferIndex]);
// m_audioFifo->write((const quint8*) &m_audioFifoBuffer[0], m_audioFifoBufferSize);
// std::copy(&audioBuffer[2*remainder], &audioBuffer[2*frame_count], &m_audioFifoBuffer[0]);
// m_audioFifoBufferIndex = frame_count - remainder;
// std::for_each(m_audioFifoBuffer, m_audioFifoBuffer+2*m_audioFifoBufferSize, [this](int16_t &x) {
// x *= m_audioVolume;
// });
// int ret = m_audioFifo->write((const quint8*) &m_audioFifoBuffer[0], m_audioFifoBufferSize);
// if (ret < m_audioFifoBufferSize) {
// qDebug("DATVideoRender::RenderStream: audio samples missing %d/%d written", ret, m_audioFifoBufferSize);
// }
// std::copy(&audioBuffer[2*remainder], &audioBuffer[2*samples_per_channel], &m_audioFifoBuffer[0]);
// m_audioFifoBufferIndex = samples_per_channel - remainder;
// }
// Apply volume:
for (int i = 0; i < frame_count; i++)
{
m_audioFifoBuffer[2*m_audioFifoBufferIndex] = m_audioVolume * audioBuffer[2*i];
m_audioFifoBuffer[2*m_audioFifoBufferIndex+1] = m_audioVolume * audioBuffer[2*i+1];
m_audioFifoBufferIndex++;
if (m_audioFifoBufferIndex >= m_audioFifoBufferSize)
{
m_audioFifo->write((const quint8*) &m_audioFifoBuffer[0], m_audioFifoBufferSize);
m_audioFifoBufferIndex = 0;
}
}
av_freep(&audioBuffer);
}
}
else