284 lines
8.3 KiB
C++
284 lines
8.3 KiB
C++
// Copyright (c) 2005-2007, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file audio_player_portaudio.cpp
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/// @brief PortAudio v18-based audio output
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/// @ingroup audio_output
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///
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#include "config.h"
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#ifdef WITH_PORTAUDIO
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// Headers
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#include "audio_player_portaudio.h"
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#include "audio_provider_manager.h"
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#include "charset_conv.h"
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#include "options.h"
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#include "utils.h"
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#include <wx/log.h>
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//#define PORTAUDIO_DEBUG
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// Init reference counter
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int PortAudioPlayer::pa_refcount = 0;
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/// @brief Constructor
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PortAudioPlayer::PortAudioPlayer() {
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// Initialize portaudio
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if (!pa_refcount) {
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PaError err = Pa_Initialize();
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if (err != paNoError) {
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static wchar_t errormsg[2048];
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swprintf(errormsg, 2048, L"Failed opening PortAudio: %s", Pa_GetErrorText(err));
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throw (const wchar_t *)errormsg;
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}
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pa_refcount++;
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}
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volume = 1.0f;
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pos.pa_start = 0.0;
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}
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/// @brief Destructor
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PortAudioPlayer::~PortAudioPlayer() {
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// Deinit portaudio
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if (!--pa_refcount) Pa_Terminate();
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}
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/// @brief Open stream
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void PortAudioPlayer::OpenStream() {
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// Open stream
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PaStreamParameters pa_output_p;
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int pa_config_default = Options.AsInt(_T("Audio PortAudio Device"));
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PaDeviceIndex pa_device;
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if (pa_config_default < 0) {
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pa_device = Pa_GetDefaultOutputDevice();
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wxLogDebug(_T("PortAudioPlayer::OpenStream Using Default Output Device: %d"), pa_device);
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} else {
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pa_device = pa_config_default;
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wxLogDebug(_T("PortAudioPlayer::OpenStream Using Config Device: %d"), pa_device);
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}
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pa_output_p.device = pa_device;
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pa_output_p.channelCount = provider->GetChannels();
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pa_output_p.sampleFormat = paInt16;
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pa_output_p.suggestedLatency = Pa_GetDeviceInfo(pa_device)->defaultLowOutputLatency;
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pa_output_p.hostApiSpecificStreamInfo = NULL;
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wxLogDebug(_T("PortAudioPlayer::OpenStream Output channels: %d, Latency: %f Sample Rate: %ld\n"),
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pa_output_p.channelCount, pa_output_p.suggestedLatency, pa_output_p.sampleFormat);
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PaError err = Pa_OpenStream(&stream, NULL, &pa_output_p, provider->GetSampleRate(), 256, paPrimeOutputBuffersUsingStreamCallback, paCallback, this);
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if (err != paNoError) {
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const PaHostErrorInfo *pa_err = Pa_GetLastHostErrorInfo();
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if (pa_err->errorCode != 0) {
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wxLogDebug(_T("PortAudioPlayer::OpenStream HostError: API: %d, %s (%ld)\n"), pa_err->hostApiType, pa_err->errorText, pa_err->errorCode);
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}
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throw wxString(_T("Failed initializing PortAudio stream with error: ") + wxString(Pa_GetErrorText(err),csConvLocal));
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}
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}
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/// @brief Close stream
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void PortAudioPlayer::CloseStream() {
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Stop(false);
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Pa_CloseStream(stream);
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}
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/// @brief Called when the callback has finished.
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/// @param userData Local data to be handed to the callback.
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void PortAudioPlayer::paStreamFinishedCallback(void *userData) {
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PortAudioPlayer *player = (PortAudioPlayer *) userData;
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if (player->displayTimer) {
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player->displayTimer->Stop();
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}
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wxLogDebug(_T("PortAudioPlayer::paStreamFinishedCallback Stopping stream."));
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}
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/// @brief Play audio.
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/// @param start Start position.
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/// @param count Frame count
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void PortAudioPlayer::Play(int64_t start,int64_t count) {
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PaError err;
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// Set values
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pos.end = start + count;
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pos.current = start;
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pos.start = start;
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// Start playing
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if (!IsPlaying()) {
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err = Pa_SetStreamFinishedCallback(stream, paStreamFinishedCallback);
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if (err != paNoError) {
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wxLogDebug(_T("PortAudioPlayer::Play Could not set FinishedCallback.\n"));
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return;
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}
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err = Pa_StartStream(stream);
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if (err != paNoError) {
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wxLogDebug(_T("PortAudioPlayer::Play Error playing stream.\n"));
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return;
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}
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}
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pos.pa_start = Pa_GetStreamTime(stream);
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// Update timer
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if (displayTimer && !displayTimer->IsRunning()) displayTimer->Start(15);
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}
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/// @brief Stop Playback
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/// @param timerToo Stop display timer?
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///
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void PortAudioPlayer::Stop(bool timerToo) {
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// Stop stream
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Pa_StopStream (stream);
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// Stop timer
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if (timerToo && displayTimer) {
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displayTimer->Stop();
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}
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}
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/// @brief PortAudio callback, used to fill buffer for playback, and prime the playback buffer.
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/// @param inputBuffer Input buffer.
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/// @param outputBuffer Output buffer.
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/// @param framesPerBuffer Frames per buffer.
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/// @param timeInfo PortAudio time information.
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/// @param statusFlags Status flags
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/// @param userData Local data to hand callback
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/// @return Whether to stop playback.
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///
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int PortAudioPlayer::paCallback(
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const void *inputBuffer,
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void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData) {
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// Get provider
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PortAudioPlayer *player = (PortAudioPlayer *) userData;
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AudioProvider *provider = player->GetProvider();
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#ifdef PORTAUDIO_DEBUG
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printf("paCallBack: pos.current: %lld pos.start: %lld paStart: %f Pa_GetStreamTime: %f AdcTime: %f DacTime: %f framesPerBuffer: %lu CPU: %f\n",
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player->pos.current, player->pos.start, player->paStart, Pa_GetStreamTime(player->stream),
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timeInfo->inputBufferAdcTime, timeInfo->outputBufferDacTime, framesPerBuffer, Pa_GetStreamCpuLoad(player->stream));
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#endif
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// Calculate how much left
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int64_t lenAvailable = (player->pos.end - player->pos.current) > 0 ? framesPerBuffer : 0;
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// Play something
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if (lenAvailable > 0) {
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provider->GetAudioWithVolume(outputBuffer, player->pos.current, lenAvailable, player->GetVolume());
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// Set play position
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player->pos.current += framesPerBuffer;
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// Continue as normal
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return 0;
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}
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// Abort stream and stop the callback.
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return paAbort;
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}
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/// @brief Get current stream position.
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/// @return Stream position
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int64_t PortAudioPlayer::GetCurrentPosition()
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{
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if (!IsPlaying()) return 0;
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const PaStreamInfo* streamInfo = Pa_GetStreamInfo(stream);
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#ifdef PORTAUDIO_DEBUG
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PaTime pa_getstream = Pa_GetStreamTime(stream);
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int64_t real = ((pa_getstream - paStart) * streamInfo->sampleRate) + pos.start;
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printf("GetCurrentPosition: Pa_GetStreamTime: %f pos.start: %lld pos.current: %lld paStart: %f real: %lld diff: %f\n",
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pa_getstream, pos.start, pos.current, paStart, real, pa_getstream-paStart);
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return real;
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#endif
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return ((Pa_GetStreamTime(stream) - pos.pa_start) * streamInfo->sampleRate) + pos.start;
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}
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/// @brief Get list of available output devices
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/// @param favorite Favorite output device
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/// @return List of available output devices with the 'favorite' being first in the list.
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wxArrayString PortAudioPlayer::GetOutputDevices(wxString favorite) {
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wxArrayString list;
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int devices = Pa_GetDeviceCount();
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int i;
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if (devices < 0) {
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// some error here
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}
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for (i=0; i<devices; i++) {
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const PaDeviceInfo *dev_info = Pa_GetDeviceInfo(i);
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wxString name(dev_info->name, wxConvUTF8);
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list.Insert(name, i);
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}
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return list;
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}
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bool PortAudioPlayer::IsPlaying() {
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return Pa_IsStreamActive(stream) ? true : false;
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}
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#endif // WITH_PORTAUDIO
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