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added: cache audio samples in the jack client until they're retrieved by the render thread

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Bob 2012-11-09 20:44:11 +01:00
parent 212eb0ae85
commit e7f62224b8
2 changed files with 18 additions and 15 deletions
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32
src/jackclient.cpp
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@ -48,7 +48,6 @@ CJackClient::CJackClient()
m_outsamplerate = 40000;
m_buf = NULL;
m_bufsize = 0;
m_bufupdated = false;
m_srcstate = NULL;
m_outsamples = 0;
@ -167,10 +166,9 @@ void CJackClient::Disconnect()
m_exitstatus = (jack_status_t)0;
m_samplerate = 0;
delete[] m_buf;
free(m_buf);
m_buf = NULL;
m_bufsize = 0;
m_bufupdated = false;
if (m_srcstate)
{
@ -234,13 +232,19 @@ int CJackClient::SJackProcessCallback(jack_nframes_t nframes, void *arg)
return 0;
}
#define MAXBUFFER (1024 * 1024)
void CJackClient::PJackProcessCallback(jack_nframes_t nframes)
{
if (m_bufsize < nframes)
unsigned int neededsize = m_outsamples + nframes;
if (neededsize > MAXBUFFER)
{
delete[] m_buf;
m_buf = new float[nframes];
m_bufsize = nframes;
return;
}
else if (m_bufsize < neededsize)
{
m_bufsize = neededsize;
m_buf = (float*)realloc(m_buf, m_bufsize * sizeof(float));
}
CLock lock(m_condition);
@ -249,15 +253,14 @@ void CJackClient::PJackProcessCallback(jack_nframes_t nframes)
SRC_DATA srcdata = {};
srcdata.data_in = jackptr;
srcdata.data_out = m_buf;
srcdata.data_out = m_buf + m_outsamples;
srcdata.input_frames = nframes;
srcdata.output_frames = nframes;
srcdata.src_ratio = (double)m_outsamplerate / m_samplerate;
src_process(m_srcstate, &srcdata);
m_outsamples = srcdata.output_frames_gen;
m_outsamples += srcdata.output_frames_gen;
m_bufupdated = true;
lock.Leave();
m_condition.Signal();
}
@ -265,9 +268,9 @@ void CJackClient::PJackProcessCallback(jack_nframes_t nframes)
int CJackClient::GetAudio(float*& buf, int& bufsize, int& samplerate)
{
CLock lock(m_condition);
m_condition.Wait(1000000, m_bufupdated, false);
m_condition.Wait(1000000, m_outsamples, 0);
if (!m_bufupdated)
if (m_outsamples == 0)
return 0;
samplerate = m_outsamplerate;
@ -280,9 +283,10 @@ int CJackClient::GetAudio(float*& buf, int& bufsize, int& samplerate)
memcpy(buf, m_buf, m_outsamples * sizeof(float));
m_bufupdated = false;
int outsamples = m_outsamples;
m_outsamples = 0;
return m_outsamples;
return outsamples;
}
void CJackClient::SJackInfoShutdownCallback(jack_status_t code, const char *reason, void *arg)

1
src/jackclient.h
View file

@ -61,7 +61,6 @@ class CJackClient
CCondition m_condition;
float* m_buf;
unsigned int m_bufsize;
bool m_bufupdated;
SRC_STATE* m_srcstate;
int m_outsamples;