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DATV demod: audio implementation (2)

This commit is contained in:
f4exb 2019-03-21 08:35:29 +01:00
parent 80a25cc8fb
commit 2d86373418
2 changed files with 31 additions and 31 deletions
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56
plugins/channelrx/demoddatv/datvideorender.cpp
View File

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

6
plugins/channelrx/demoddatv/datvideorender.h
View File

@ -116,9 +116,9 @@ class DATVideoRender : public TVScreen
AudioFifo *m_audioFifo;
struct SwrContext* m_audioSWR;
int m_audioSampleRate;
static const int m_audioTestSize = 32768;
uint16_t m_audioTest[m_audioTestSize*2]; // 2 channels
int m_audioTestIndex;
static const int m_audioFifoBufferSize = 16000;
uint16_t m_audioFifoBuffer[m_audioFifoBufferSize*2]; // 2 channels
int m_audioFifoBufferIndex;
uint8_t *m_pbytDecodedData[4];
int m_pintDecodedLineSize[4];