Aegisub/aegisub/src/audio_player_portaudio.cpp
2012-11-13 08:51:01 -08:00

292 lines
9.4 KiB
C++

// Copyright (c) 2005-2007, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
/// @file audio_player_portaudio.cpp
/// @brief PortAudio v18-based audio output
/// @ingroup audio_output
///
#include "config.h"
#ifdef WITH_PORTAUDIO
#include <libaegisub/log.h>
#include "audio_player_portaudio.h"
#include "audio_controller.h"
#include "compat.h"
#include "include/aegisub/audio_provider.h"
#include "main.h"
#include "utils.h"
DEFINE_SIMPLE_EXCEPTION(PortAudioError, agi::AudioPlayerOpenError, "audio/player/open/portaudio")
// Uncomment to enable extremely spammy debug logging
//#define PORTAUDIO_DEBUG
/// Order that the host APIs should be tried if there are multiple available
static const PaHostApiTypeId pa_host_api_priority[] = {
// No WDMKS or ASIO as they don't support shared mode (and WDMKS is pretty broken)
paWASAPI,
paDirectSound,
paMME,
paCoreAudio,
#ifdef __APPLE__
paAL,
#endif
paALSA,
paOSS
};
static const size_t pa_host_api_priority_count = sizeof(pa_host_api_priority) / sizeof(pa_host_api_priority[0]);
PortAudioPlayer::PortAudioPlayer(AudioProvider *provider)
: AudioPlayer(provider)
, volume(1.0f)
, pa_start(0.0)
, stream(0)
{
PaError err = Pa_Initialize();
if (err != paNoError)
throw PortAudioError(std::string("Failed opening PortAudio: ") + Pa_GetErrorText(err), 0);
// Build a list of host API-specific devices we can use
// Some host APIs may not support all audio formats, so build a priority
// list of host APIs for each device rather than just always using the best
for (size_t i = 0; i < pa_host_api_priority_count; ++i) {
PaHostApiIndex host_idx = Pa_HostApiTypeIdToHostApiIndex(pa_host_api_priority[i]);
if (host_idx >= 0)
GatherDevices(host_idx);
}
GatherDevices(Pa_GetDefaultHostApi());
if (devices.empty())
throw PortAudioError("No PortAudio output devices found", 0);
if (provider)
OpenStream();
}
void PortAudioPlayer::GatherDevices(PaHostApiIndex host_idx) {
const PaHostApiInfo *host_info = Pa_GetHostApiInfo(host_idx);
if (!host_info) return;
for (int host_device_idx = 0; host_device_idx < host_info->deviceCount; ++host_device_idx) {
PaDeviceIndex real_idx = Pa_HostApiDeviceIndexToDeviceIndex(host_idx, host_device_idx);
if (real_idx < 0) continue;
const PaDeviceInfo *device_info = Pa_GetDeviceInfo(real_idx);
if (!device_info) continue;
if (device_info->maxOutputChannels <= 0) continue;
// MME truncates device names so check for prefix rather than exact match
std::map<std::string, DeviceVec>::iterator dev_it = devices.lower_bound(device_info->name);
if (dev_it == devices.end() || dev_it->first.find(device_info->name) != 0) {
devices[device_info->name];
--dev_it;
}
dev_it->second.push_back(real_idx);
if (real_idx == host_info->defaultOutputDevice)
default_device.push_back(real_idx);
}
}
PortAudioPlayer::~PortAudioPlayer() {
if (stream) {
Stop();
Pa_CloseStream(stream);
}
Pa_Terminate();
}
void PortAudioPlayer::OpenStream() {
DeviceVec *device_ids = 0;
std::string device_name = OPT_GET("Player/Audio/PortAudio/Device Name")->GetString();
if (devices.count(device_name)) {
device_ids = &devices[device_name];
LOG_D("audio/player/portaudio") << "using config device: " << device_name;
}
if (!device_ids || device_ids->empty()) {
device_ids = &default_device;
LOG_D("audio/player/portaudio") << "using default output device";
}
std::string error;
for (size_t i = 0; i < device_ids->size(); ++i) {
const PaDeviceInfo *device_info = Pa_GetDeviceInfo((*device_ids)[i]);
PaStreamParameters pa_output_p;
pa_output_p.device = (*device_ids)[i];
pa_output_p.channelCount = provider->GetChannels();
pa_output_p.sampleFormat = paInt16;
pa_output_p.suggestedLatency = device_info->defaultLowOutputLatency;
pa_output_p.hostApiSpecificStreamInfo = nullptr;
LOG_D("audio/player/portaudio") << "OpenStream:"
<< " output channels: " << pa_output_p.channelCount
<< " latency: " << pa_output_p.suggestedLatency
<< " sample rate: " << provider->GetSampleRate()
<< " sample format: " << pa_output_p.sampleFormat;
PaError err = Pa_OpenStream(&stream, nullptr, &pa_output_p, provider->GetSampleRate(), 0, paPrimeOutputBuffersUsingStreamCallback, paCallback, this);
if (err == paNoError) {
LOG_D("audo/player/portaudio") << "Using device " << pa_output_p.device << " " << device_info->name << " " << Pa_GetHostApiInfo(device_info->hostApi)->name;
return;
}
else {
const PaHostErrorInfo *pa_err = Pa_GetLastHostErrorInfo();
LOG_D_IF(pa_err->errorCode != 0, "audio/player/portaudio") << "HostError: API: " << pa_err->hostApiType << ", " << pa_err->errorText << ", " << pa_err->errorCode;
LOG_D("audio/player/portaudio") << "Failed initializing PortAudio stream with error: " << Pa_GetErrorText(err);
error += Pa_GetErrorText(err);
error += " ";
}
}
throw PortAudioError("Failed initializing PortAudio stream: " + error, 0);
}
void PortAudioPlayer::paStreamFinishedCallback(void *) {
LOG_D("audio/player/portaudio") << "stopping stream";
}
void PortAudioPlayer::Play(int64_t start_sample, int64_t count) {
current = start_sample;
start = start_sample;
end = start_sample + count;
// Start playing
if (!IsPlaying()) {
PaError err = Pa_SetStreamFinishedCallback(stream, paStreamFinishedCallback);
if (err != paNoError) {
LOG_D("audio/player/portaudio") << "could not set FinishedCallback";
return;
}
err = Pa_StartStream(stream);
if (err != paNoError) {
LOG_D("audio/player/portaudio") << "error playing stream";
return;
}
}
pa_start = Pa_GetStreamTime(stream);
}
void PortAudioPlayer::Stop() {
Pa_StopStream(stream);
}
int PortAudioPlayer::paCallback(const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags, void *userData)
{
PortAudioPlayer *player = (PortAudioPlayer *)userData;
#ifdef PORTAUDIO_DEBUG
LOG_D("audio/player/portaudio") << "psCallback:"
<< " current: " << player->current
<< " start: " << player->start
<< " pa_start: " << player->pa_start
<< " currentTime: " << timeInfo->currentTime
<< " AdcTime: " << timeInfo->inputBufferAdcTime
<< " DacTime: " << timeInfo->outputBufferDacTime
<< " framesPerBuffer: " << framesPerBuffer
<< " CPU: " << Pa_GetStreamCpuLoad(player->stream);
#endif
// Calculate how much left
int64_t lenAvailable = std::min<int64_t>(player->end - player->current, framesPerBuffer);
// Play something
if (lenAvailable > 0) {
player->provider->GetAudioWithVolume(outputBuffer, player->current, lenAvailable, player->GetVolume());
// Set play position
player->current += lenAvailable;
// Continue as normal
return 0;
}
// Abort stream and stop the callback.
return paAbort;
}
int64_t PortAudioPlayer::GetCurrentPosition() {
if (!IsPlaying()) return 0;
PaTime pa_time = Pa_GetStreamTime(stream);
int64_t real = (pa_time - pa_start) * provider->GetSampleRate() + start;
// If portaudio isn't giving us time info then estimate based on buffer fill and current latency
if (pa_time == 0 && pa_start == 0)
real = current - Pa_GetStreamInfo(stream)->outputLatency * provider->GetSampleRate();
#ifdef PORTAUDIO_DEBUG
LOG_D("audio/player/portaudio") << "GetCurrentPosition:"
<< " pa_time: " << pa_time
<< " start: " << start
<< " current: " << current
<< " pa_start: " << pa_start
<< " real: " << real
<< " diff: " << pa_time - pa_start;
#endif
return real;
}
wxArrayString PortAudioPlayer::GetOutputDevices() {
wxArrayString list;
list.push_back("Default");
try {
PortAudioPlayer player(0);
for (std::map<std::string, DeviceVec>::iterator it = player.devices.begin(); it != player.devices.end(); ++it)
list.push_back(lagi_wxString(it->first));
}
catch (PortAudioError const&) {
// No output devices, just return the list with only Default
}
return list;
}
bool PortAudioPlayer::IsPlaying() {
return !!Pa_IsStreamActive(stream);
}
#endif // WITH_PORTAUDIO