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Support audio playing (AT3, AT3+, Mp3, AAC)
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// Copyright (c) 2013- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "Core/HW/SimpleAudioDec.h"
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#include "Core/HW/MediaEngine.h"
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#include "Core/HW/BufferQueue.h"
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#ifdef USE_FFMPEG
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extern "C" {
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#include <libavformat/avformat.h>
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#include <libswresample/swresample.h>
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#include <libavutil/samplefmt.h>
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}
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#endif // USE_FFMPEG
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bool SimpleAudio::GetAudioCodecID(int audioType){
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#ifdef USE_FFMPEG
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switch (audioType)
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{
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case PSP_CODEC_AAC:
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audioCodecId = AV_CODEC_ID_AAC;
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break;
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case PSP_CODEC_AT3:
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audioCodecId = AV_CODEC_ID_ATRAC3;
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break;
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case PSP_CODEC_AT3PLUS:
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audioCodecId = AV_CODEC_ID_ATRAC3P;
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break;
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case PSP_CODEC_MP3:
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audioCodecId = AV_CODEC_ID_MP3;
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break;
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default:
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audioType = 0;
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break;
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}
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if (audioType != 0){
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return true;
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}
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return false;
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#else
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return false;
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#endif // USE_FFMPEG
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}
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SimpleAudio::SimpleAudio(int audioType)
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: codec_(0),
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codecCtx_(0),
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swrCtx_(0) {
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SimpleAudio::audioType = audioType;
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#ifdef USE_FFMPEG
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frame_ = av_frame_alloc();
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// Get Audio Codec ID
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if (!GetAudioCodecID(audioType)){
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ERROR_LOG(ME, "This version of FFMPEG does not support Audio codec type: %08x. Update your submodule.", audioType);
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return;
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}
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// Find decoder
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codec_ = avcodec_find_decoder(audioCodecId);
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if (!codec_) {
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// Eh, we shouldn't even have managed to compile. But meh.
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ERROR_LOG(ME, "This version of FFMPEG does not support AV_CODEC_ID for audio (%s). Update your submodule.", GetCodecName(audioType));
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return;
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}
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// Allocate codec context
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codecCtx_ = avcodec_alloc_context3(codec_);
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if (!codecCtx_) {
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ERROR_LOG(ME, "Failed to allocate a codec context");
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return;
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}
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codecCtx_->channels = 2;
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codecCtx_->channel_layout = AV_CH_LAYOUT_STEREO;
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// Open codec
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AVDictionary *opts = 0;
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if (avcodec_open2(codecCtx_, codec_, &opts) < 0) {
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ERROR_LOG(ME, "Failed to open codec");
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return;
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}
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av_dict_free(&opts);
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#endif // USE_FFMPEG
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}
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SimpleAudio::SimpleAudio(u32 ctxPtr, int audioType)
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: codec_(0),
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codecCtx_(0),
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swrCtx_(0) {
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SimpleAudio::ctxPtr = ctxPtr;
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SimpleAudio::audioType = audioType;
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#ifdef USE_FFMPEG
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frame_ = av_frame_alloc();
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// Get Audio Codec ID
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if (!GetAudioCodecID(audioType)){
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ERROR_LOG(ME, "This version of FFMPEG does not support Audio codec type: %08x. Update your submodule.", audioType);
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return;
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}
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// Find decoder
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codec_ = avcodec_find_decoder(audioCodecId);
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if (!codec_) {
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// Eh, we shouldn't even have managed to compile. But meh.
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ERROR_LOG(ME, "This version of FFMPEG does not support AV_CODEC_ID for audio (%s). Update your submodule.",GetCodecName(audioType));
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return;
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}
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// Allocate codec context
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codecCtx_ = avcodec_alloc_context3(codec_);
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if (!codecCtx_) {
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ERROR_LOG(ME, "Failed to allocate a codec context");
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return;
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}
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codecCtx_->channels = 2;
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codecCtx_->channel_layout = AV_CH_LAYOUT_STEREO;
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// Open codec
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AVDictionary *opts = 0;
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if (avcodec_open2(codecCtx_, codec_, &opts) < 0) {
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ERROR_LOG(ME, "Failed to open codec");
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return;
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}
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av_dict_free(&opts);
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#endif // USE_FFMPEG
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}
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SimpleAudio::~SimpleAudio() {
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#ifdef USE_FFMPEG
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if (frame_)
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av_frame_free(&frame_);
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if (codecCtx_)
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avcodec_close(codecCtx_);
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codecCtx_ = 0;
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codec_ = 0;
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if (swrCtx_)
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swr_free(&swrCtx_);
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#endif // USE_FFMPEG
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}
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// Input is a single Audio packet.
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bool SimpleAudio::Decode(void* inbuf, int inbytes, uint8_t *outbuf, int *outbytes) {
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#ifdef USE_FFMPEG
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AVPacket packet = { 0 };
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av_init_packet(&packet);
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packet.data = static_cast<uint8_t *>(inbuf);
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packet.size = inbytes;
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int got_frame = 0;
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av_frame_unref(frame_);
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int len = avcodec_decode_audio4(codecCtx_, frame_, &got_frame, &packet);
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if (len < 0) {
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ERROR_LOG(ME, "Error decoding Audio frame");
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// TODO: cleanup
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return false;
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}
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if (got_frame) {
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// Initializing the sample rate convert. We will use it to convert float output into int.
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int64_t wanted_channel_layout = AV_CH_LAYOUT_STEREO; // we want stereo output layout
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int64_t dec_channel_layout = frame_->channel_layout; // decoded channel layout
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swrCtx_ = swr_alloc_set_opts(
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swrCtx_,
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wanted_channel_layout,
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AV_SAMPLE_FMT_S16,
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codecCtx_->sample_rate,
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dec_channel_layout,
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codecCtx_->sample_fmt,
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codecCtx_->sample_rate,
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0,
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NULL);
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if (!swrCtx_ || swr_init(swrCtx_) < 0) {
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ERROR_LOG(ME, "swr_init: Failed to initialize the resampling context");
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avcodec_close(codecCtx_);
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codec_ = 0;
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return false;
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}
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// convert audio to AV_SAMPLE_FMT_S16
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int swrRet = swr_convert(swrCtx_, &outbuf, frame_->nb_samples, (const u8 **)frame_->extended_data, frame_->nb_samples);
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if (swrRet < 0) {
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ERROR_LOG(ME, "swr_convert: Error while converting %d", swrRet);
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return false;
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}
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// We always convert to stereo.
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__AdjustBGMVolume((s16 *)outbuf, frame_->nb_samples * 2);
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}
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return true;
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#else
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// Zero bytes output. No need to memset.
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*outbytes = 0;
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return true;
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#endif // USE_FFMPEG
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}
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SimpleAudio *AudioCreate(int audioType) {
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#ifdef USE_FFMPEG
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avcodec_register_all();
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av_register_all();
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InitFFmpeg();
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SimpleAudio *Audio = new SimpleAudio(audioType);
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if (!Audio->IsOK()) {
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delete Audio;
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return 0;
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}
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return Audio;
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#else
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return 0;
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#endif // USE_FFMPEG
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}
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SimpleAudio *AudioCreate(u32 ctxPtr, int audioType) {
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#ifdef USE_FFMPEG
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avcodec_register_all();
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av_register_all();
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InitFFmpeg();
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SimpleAudio *Audio = new SimpleAudio(ctxPtr, audioType);
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if (!Audio->IsOK()) {
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delete Audio;
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return 0;
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}
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return Audio;
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#else
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return 0;
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#endif // USE_FFMPEG
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}
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bool AudioDecode(SimpleAudio *ctx, void* inbuf, int inbytes, int *outbytes, uint8_t *outbuf) {
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#ifdef USE_FFMPEG
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return ctx->Decode(inbuf, inbytes, outbuf, outbytes);
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#else
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*outbytes = 0;
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return true;
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#endif // USE_FFMPEG
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}
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void AudioClose(SimpleAudio **ctx) {
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#ifdef USE_FFMPEG
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delete *ctx;
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*ctx = 0;
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#endif // USE_FFMPEG
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}
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bool isValidCodec(int codec){
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if (codec >= PSP_CODEC_AT3PLUS && codec <= PSP_CODEC_AAC) {
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return true;
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}
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return false;
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}
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