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DATV demod: audio implementation (2)
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@ -16,6 +16,7 @@
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///////////////////////////////////////////////////////////////////////////////////
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#include <math.h>
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#include <algorithm>
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extern "C"
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{
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@ -41,7 +42,7 @@ DATVideoRender::DATVideoRender(QWidget *parent) : TVScreen(true, parent)
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m_audioFifo = nullptr;
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m_audioSWR = nullptr;
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m_audioSampleRate = 48000;
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m_audioTestIndex = 0;
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m_audioFifoBufferIndex = 0;
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m_videoStreamIndex = -1;
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m_audioStreamIndex = -1;
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@ -51,11 +52,11 @@ DATVideoRender::DATVideoRender(QWidget *parent) : TVScreen(true, parent)
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m_frame = nullptr;
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m_frameCount = -1;
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for (int i = 0; i < m_audioTestSize; i++)
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{
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m_audioTest[2*i] = 32768.0f * sin((M_PI * i)/1024.0f);
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m_audioTest[2*i+1] = m_audioTest[2*i];
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}
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// for (int i = 0; i < m_audioFifoBufferSize; i++)
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// {
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// m_audioFifoBuffer[2*i] = 8192.0f * sin((M_PI * i)/(m_audioFifoBufferSize/1000.0f));
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// m_audioFifoBuffer[2*i+1] = m_audioFifoBuffer[2*i];
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// }
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}
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bool DATVideoRender::eventFilter(QObject *obj, QEvent *event)
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@ -584,34 +585,33 @@ bool DATVideoRender::RenderStream()
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av_samples_alloc((uint8_t**) &audioBuffer, nullptr, 2, m_frame->nb_samples, AV_SAMPLE_FMT_S16, 0);
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int frame_count = swr_convert(m_audioSWR, (uint8_t**) &audioBuffer, m_frame->nb_samples, (const uint8_t**) m_frame->data, m_frame->nb_samples);
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// int res = m_audioFifo->write((const quint8*)&m_audioBuffer[0], frame_count);
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// int ret = m_audioFifo->write((const quint8*) &audioBuffer[0], frame_count);
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// if (res != frame_count)
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// {
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// qDebug("DATVideoRender::RenderStream: %u/%u audio samples written", res, frame_count);
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// m_audioFifo->clear();
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// if (ret < frame_count) {
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// qDebug("DATVideoRender::RenderStream: audio frames missing %d vs %d", ret, frame_count);
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// }
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int count = frame_count;
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int i = m_audioTestIndex;
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while (count > 0)
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if (m_audioFifoBufferIndex + frame_count < m_audioFifoBufferSize)
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{
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if (i + count < m_audioTestSize)
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{
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m_audioFifo->write((const quint8*)&m_audioTest[2*i], 2*count);
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i += count;
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count = 0;
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}
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else
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{
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m_audioFifo->write((const quint8*)&m_audioTest[2*i], 2*(m_audioTestSize - i));
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count -= (m_audioTestSize - i);
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i = 0;
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}
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std::copy(&audioBuffer[0], &audioBuffer[2*frame_count], &m_audioFifoBuffer[2*m_audioFifoBufferIndex]);
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m_audioFifoBufferIndex += frame_count;
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}
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else
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{
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int remainder = m_audioFifoBufferSize - m_audioFifoBufferIndex;
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std::copy(&audioBuffer[0], &audioBuffer[2*remainder], &m_audioFifoBuffer[2*m_audioFifoBufferIndex]);
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m_audioFifo->write((const quint8*) &m_audioFifoBuffer[0], m_audioFifoBufferSize);
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std::copy(&audioBuffer[2*remainder], &audioBuffer[2*frame_count], &m_audioFifoBuffer[0]);
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m_audioFifoBufferIndex = frame_count - remainder;
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}
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m_audioTestIndex = i;
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// m_audioFifoBufferIndex += frame_count;
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// if (m_audioFifoBufferIndex >= m_audioFifoBufferSize)
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// {
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// m_audioFifo->write((const quint8*)&m_audioFifoBuffer[0], m_audioFifoBufferSize);
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// m_audioFifoBufferIndex -= m_audioFifoBufferSize;
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// }
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}
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}
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else
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@ -116,9 +116,9 @@ class DATVideoRender : public TVScreen
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AudioFifo *m_audioFifo;
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struct SwrContext* m_audioSWR;
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int m_audioSampleRate;
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static const int m_audioTestSize = 32768;
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uint16_t m_audioTest[m_audioTestSize*2]; // 2 channels
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int m_audioTestIndex;
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static const int m_audioFifoBufferSize = 16000;
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uint16_t m_audioFifoBuffer[m_audioFifoBufferSize*2]; // 2 channels
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int m_audioFifoBufferIndex;
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uint8_t *m_pbytDecodedData[4];
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int m_pintDecodedLineSize[4];
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