mirror of
https://github.com/hrydgard/ppsspp.git
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93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
// 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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#pragma once
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#include <cmath>
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#include "base/basictypes.h"
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#include "Core/HW/MediaEngine.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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// Wraps FFMPEG in a nice interface that's drop-in compatible with
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// the old one. Decodes packet by packet - does NOT demux. That's done by
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// MpegDemux. Only decodes Atrac3+, not regular Atrac3.
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// Based on http://ffmpeg.org/doxygen/trunk/doc_2examples_2decoding_encoding_8c-example.html#_a13
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// Ideally, Maxim's Atrac3+ decoder would be available as a standalone library
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// that we could link, as that would be totally sufficient for the use case here.
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// However, it will be maintained as a part of FFMPEG so that's the way we'll go
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// for simplicity and sanity.
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struct SimpleAudio {
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public:
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SimpleAudio(int);
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SimpleAudio(u32, int);
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~SimpleAudio();
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bool Decode(void* inbuf, int inbytes, uint8_t *outbuf, int *outbytes);
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bool IsOK() const { return codec_ != 0; }
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u32 ctxPtr;
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int audioType;
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private:
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#ifdef USE_FFMPEG
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AVFrame *frame_;
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AVCodec *codec_;
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AVCodecContext *codecCtx_;
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SwrContext *swrCtx_;
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AVCodecID audioCodecId; // AV_CODEC_ID_XXX
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bool GetAudioCodecID(int audioType); // Get audioCodecId from audioType
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#endif // USE_FFMPEG
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};
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enum {
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PSP_CODEC_AT3PLUS = 0x00001000,
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PSP_CODEC_AT3 = 0x00001001,
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PSP_CODEC_MP3 = 0x00001002,
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PSP_CODEC_AAC = 0x00001003,
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};
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static const char *const codecNames[4] = {
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"AT3+", "AT3", "MP3", "AAC",
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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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void AudioClose(SimpleAudio **ctx);
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static const char *GetCodecName(int codec) {
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if (codec >= PSP_CODEC_AT3PLUS && codec <= PSP_CODEC_AAC) {
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return codecNames[codec - PSP_CODEC_AT3PLUS];
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}
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else {
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return "(unk)";
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}
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};
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bool isValidCodec(int codec);
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