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audiooutputnull.cpp
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audiooutputnull.cpp
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#include <cstdio>
#include <cstdlib>
#include <fcntl.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
#include <sys/ioctl.h>
#include <cerrno>
#include <cstring>
#include <iostream>
#include <qdatetime.h>
#include "config.h"
using namespace std;
#include "mythcontext.h"
#include "audiooutputnull.h"
AudioOutputNULL::AudioOutputNULL(
QString laudio_main_device, QString laudio_passthru_device,
int laudio_bits, int laudio_channels,
int laudio_samplerate, AudioOutputSource lsource,
bool lset_initial_vol, bool laudio_passthru) :
AudioOutputBase(laudio_main_device, laudio_passthru_device,
laudio_bits, laudio_channels,
laudio_samplerate, lsource,
lset_initial_vol, laudio_passthru),
pcm_output_buffer_mutex(false),
current_buffer_size(0),
locked_audio_channels(laudio_channels),
locked_audio_bits(laudio_bits),
locked_audio_samplerate(laudio_samplerate)
{
bzero(pcm_output_buffer, sizeof(char) * NULLAUDIO_OUTPUT_BUFFER_SIZE);
Reconfigure(laudio_bits, laudio_channels,
laudio_samplerate, laudio_passthru);
}
AudioOutputNULL::~AudioOutputNULL()
{
KillAudio();
}
bool AudioOutputNULL::OpenDevice()
{
VERBOSE(VB_GENERAL, "Opening NULL audio device.");
fragment_size = NULLAUDIO_OUTPUT_BUFFER_SIZE / 2;
soundcard_buffer_size = NULLAUDIO_OUTPUT_BUFFER_SIZE;
audio_bits = locked_audio_bits;
audio_channels = locked_audio_channels;
audio_samplerate = locked_audio_samplerate;
return true;
}
void AudioOutputNULL::CloseDevice()
{
}
void AudioOutputNULL::WriteAudio(unsigned char* aubuf, int size)
{
if (buffer_output_data_for_use)
{
if (size + current_buffer_size > NULLAUDIO_OUTPUT_BUFFER_SIZE)
{
VERBOSE(VB_IMPORTANT, "null audio output should not have just "
"had data written to it");
return;
}
pcm_output_buffer_mutex.lock();
memcpy(pcm_output_buffer + current_buffer_size, aubuf, size);
current_buffer_size += size;
pcm_output_buffer_mutex.unlock();
}
}
int AudioOutputNULL::readOutputData(unsigned char *read_buffer, int max_length)
{
int amount_to_read = max_length;
if (amount_to_read > current_buffer_size)
{
amount_to_read = current_buffer_size;
}
pcm_output_buffer_mutex.lock();
memcpy(read_buffer, pcm_output_buffer, amount_to_read);
memmove(pcm_output_buffer, pcm_output_buffer + amount_to_read,
current_buffer_size - amount_to_read);
current_buffer_size -= amount_to_read;
pcm_output_buffer_mutex.unlock();
return amount_to_read;
}
void AudioOutputNULL::Reset()
{
if (buffer_output_data_for_use)
{
pcm_output_buffer_mutex.lock();
current_buffer_size = 0;
pcm_output_buffer_mutex.unlock();
}
AudioOutputBase::Reset();
}
inline int AudioOutputNULL::getBufferedOnSoundcard(void)
{
if (buffer_output_data_for_use)
{
return current_buffer_size;
}
return 0;
}
inline int AudioOutputNULL::getSpaceOnSoundcard(void)
{
if (buffer_output_data_for_use)
{
return NULLAUDIO_OUTPUT_BUFFER_SIZE - current_buffer_size;
}
else
{
return NULLAUDIO_OUTPUT_BUFFER_SIZE;
}
}