1 // Copyright (c) 2012- PPSSPP Project.
2
3 // This program is free software: you can redistribute it and/or modify
4 // it under the terms of the GNU General Public License as published by
5 // the Free Software Foundation, version 2.0 or later versions.
6
7 // This program is distributed in the hope that it will be useful,
8 // but WITHOUT ANY WARRANTY; without even the implied warranty of
9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 // GNU General Public License 2.0 for more details.
11
12 // A copy of the GPL 2.0 should have been included with the program.
13 // If not, see http://www.gnu.org/licenses/
14
15 // Official git repository and contact information can be found at
16 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
17
18
19
20 // Simulation of the hardware video/audio decoders.
21 // The idea is high level emulation where we simply use FFMPEG.
22
23 #pragma once
24
25 // An approximation of what the interface will look like. Similar to JPCSP's.
26
27 #include <map>
28 #include "Common/CommonTypes.h"
29 #include "Core/HLE/sceMpeg.h"
30 #include "Core/HW/MpegDemux.h"
31 #include "Core/HW/SimpleAudioDec.h"
32
33 class PointerWrap;
34 class SimpleAudio;
35
36 #ifdef USE_FFMPEG
37 struct SwsContext;
38 struct AVFrame;
39 struct AVIOContext;
40 struct AVFormatContext;
41 struct AVCodecContext;
42 #endif
43
getMpegTimeStamp(const u8 * buf)44 inline s64 getMpegTimeStamp(const u8 *buf) {
45 return (s64)buf[5] | ((s64)buf[4] << 8) | ((s64)buf[3] << 16) | ((s64)buf[2] << 24)
46 | ((s64)buf[1] << 32) | ((s64)buf[0] << 36);
47 }
48
49 #ifdef USE_FFMPEG
50 bool InitFFmpeg();
51 #endif
52
53 class MediaEngine
54 {
55 public:
56 MediaEngine();
57 ~MediaEngine();
58
59 void closeMedia();
60 bool loadStream(const u8 *buffer, int readSize, int RingbufferSize);
61 bool reloadStream();
62 bool addVideoStream(int streamNum, int streamId = -1);
63 // open the mpeg context
64 bool openContext(bool keepReadPos = false);
65 void closeContext();
66
67 // Returns number of packets actually added. I guess the buffer might be full.
68 int addStreamData(const u8 *buffer, int addSize);
69 bool seekTo(s64 timestamp, int videoPixelMode);
70
71 bool setVideoStream(int streamNum, bool force = false);
72 // TODO: Return false if the stream doesn't exist.
setAudioStream(int streamNum)73 bool setAudioStream(int streamNum) { m_audioStream = streamNum; return true; }
74
75 u8 *getFrameImage();
76 int getRemainSize();
77 int getAudioRemainSize();
78
79 bool stepVideo(int videoPixelMode, bool skipFrame = false);
80 int writeVideoImage(u32 bufferPtr, int frameWidth = 512, int videoPixelMode = 3);
81 int writeVideoImageWithRange(u32 bufferPtr, int frameWidth, int videoPixelMode,
82 int xpos, int ypos, int width, int height);
83 int getAudioSamples(u32 bufferPtr);
84
85 s64 getVideoTimeStamp();
86 s64 getAudioTimeStamp();
87 s64 getLastTimeStamp();
88
IsVideoEnd()89 bool IsVideoEnd() { return m_isVideoEnd; }
90 bool IsNoAudioData();
91 bool IsActuallyPlayingAudio();
VideoWidth()92 int VideoWidth() { return m_desWidth; }
VideoHeight()93 int VideoHeight() { return m_desHeight; }
94
95 void DoState(PointerWrap &p);
96
97 private:
98 bool SetupStreams();
99 bool setVideoDim(int width = 0, int height = 0);
100 void updateSwsFormat(int videoPixelMode);
101 int getNextAudioFrame(u8 **buf, int *headerCode1, int *headerCode2);
102
103 public: // TODO: Very little of this below should be public.
104
105 // Video ffmpeg context - not used for audio
106 #ifdef USE_FFMPEG
107 AVFormatContext *m_pFormatCtx;
108 std::map<int, AVCodecContext *> m_pCodecCtxs;
109 AVFrame *m_pFrame;
110 AVFrame *m_pFrameRGB;
111 AVIOContext *m_pIOContext;
112 SwsContext *m_sws_ctx;
113 #endif
114
115 int m_sws_fmt;
116 u8 *m_buffer;
117 int m_videoStream;
118 int m_expectedVideoStreams;
119
120 // Used by the demuxer.
121 int m_audioStream;
122
123 int m_desWidth;
124 int m_desHeight;
125 int m_decodingsize;
126 int m_bufSize;
127 s64 m_videopts = 0;
128 s64 m_lastPts = -1;
129 BufferQueue *m_pdata;
130
131 MpegDemux *m_demux;
132 SimpleAudio *m_audioContext;
133 s64 m_audiopts;
134
135 s64 m_firstTimeStamp;
136 s64 m_lastTimeStamp;
137
138 bool m_isVideoEnd;
139
140 int m_ringbuffersize;
141 u8 m_mpegheader[0x10000]; // TODO: Allocate separately
142 int m_mpegheaderReadPos;
143 int m_mpegheaderSize;
144
145 // used for audio type
146 int m_audioType;
147 };
148