path: root/amadec/omx_audio/audio_medissource.h (plain)
blob: 35cf23ba2b1dbc3c5a049086245ea0eaf1ed1411

1
2	/*
3	#include <media/stagefright/foundation/ADebug.h>
4	#include <media/stagefright/DataSource.h>
5	#include <media/stagefright/MediaBufferGroup.h>
6	#include <media/stagefright/MediaDefs.h>
7	#include <media/stagefright/MediaErrors.h>
8	#include <media/stagefright/MediaSource.h>
9	#include <media/stagefright/MetaData.h>
10	#include <utils/String8.h>
11	#include <cutils/bitops.h>
12	*/
13	#include "MediaSource.h"
14	#include "DataSource.h"
15	#include "MediaBufferGroup.h"
16	#include "MetaData.h"
17	namespace android
18	{
19
20
21	#define DSPshort short
22	#define DSPerr short
23	#define DSPushort unsigned short /*!< DSP unsigned integer */
24	#define GBL_BYTESPERWRD 2 /*!< Bytes per packed word */
25	#define GBL_BITSPERWRD (GBL_BYTESPERWRD*8) /*!< Bytes per packed word */
26	#define GBL_SYNCWRD ((DSPshort)0x0b77) /*!< AC-3 frame sync word */
27	#define GBL_MAXFSCOD 3 /*!< Number of defined sample rates */
28	#define GBL_MAXDDDATARATE 38 /*!< Number of defined data rates */
29	#define BSI_BSID_STD 8 /*!< Standard ATSC A/52 bit-stream ID */
30	#define BSI_ISDD(bsid) ((bsid) <= BSI_BSID_STD)
31	#define GBL_MAXCHANCFGS 8 /*!< Maximum number of channel configs */
32	#define BSI_BSID_AXE 16 /*!< Annex E bitstream ID */
33	#define BSI_ISDDP(bsid) ((bsid) <= BSI_BSID_AXE && (bsid) > 10)
34	#define BSI_BSID_BITOFFSET 40 /*!< Used to skip ahead to bit-stream ID */
35	#define PTR_HEAD_SIZE 20
36
37
38	/*! \brief Bit Stream Operations module decode-side state variable structure */
39	typedef struct {
40	DSPshort *p_pkbuf; /*!< Pointer to bitstream buffer */
41	DSPshort pkbitptr; /*!< Bit count within bitstream word */
42	DSPshort pkdata; /*!< Current bitstream word */
43	#if defined(DEBUG)
44	const DSPshort *p_start_pkbuf; /*!< Pointer to beginning of bitstream buffer */
45	#endif /* defined(DEBUG) */
46	} BSOD_BSTRM;
47
48
49	const DSPshort gbl_chanary[GBL_MAXCHANCFGS] = { 2, 1, 2, 3, 3, 4, 4, 5 };
50	/* audio coding modes */
51	enum { GBL_MODE11 = 0, GBL_MODE_RSVD = 0, GBL_MODE10, GBL_MODE20,
52	GBL_MODE30, GBL_MODE21, GBL_MODE31, GBL_MODE22, GBL_MODE32
53	};
54
55	const DSPushort gbl_msktab[] = {
56	0x0000, 0x8000, 0xc000, 0xe000,
57	0xf000, 0xf800, 0xfc00, 0xfe00,
58	0xff00, 0xff80, 0xffc0, 0xffe0,
59	0xfff0, 0xfff8, 0xfffc, 0xfffe, 0xffff
60	};
61
62
63	/*! Words per frame table based on sample rate and data rate codes */
64	const DSPshort gbl_frmsizetab[GBL_MAXFSCOD][GBL_MAXDDDATARATE] = {
65	/* 48kHz */
66	{
67	64, 64, 80, 80, 96, 96, 112, 112,
68	128, 128, 160, 160, 192, 192, 224, 224,
69	256, 256, 320, 320, 384, 384, 448, 448,
70	512, 512, 640, 640, 768, 768, 896, 896,
71	1024, 1024, 1152, 1152, 1280, 1280
72	},
73	/* 44.1kHz */
74	{
75	69, 70, 87, 88, 104, 105, 121, 122,
76	139, 140, 174, 175, 208, 209, 243, 244,
77	278, 279, 348, 349, 417, 418, 487, 488,
78	557, 558, 696, 697, 835, 836, 975, 976,
79	1114, 1115, 1253, 1254, 1393, 1394
80	},
81	/* 32kHz */
82	{
83	96, 96, 120, 120, 144, 144, 168, 168,
84	192, 192, 240, 240, 288, 288, 336, 336,
85	384, 384, 480, 480, 576, 576, 672, 672,
86	768, 768, 960, 960, 1152, 1152, 1344, 1344,
87	1536, 1536, 1728, 1728, 1920, 1920
88	}
89	};
90
91
92
93	typedef int (*fp_read_buffer)(unsigned char *, int);
94	struct AudioMediaSource : public MediaSource {
95	AudioMediaSource(void *read_buffer);
96	virtual status_t start(MetaData *params = NULL);
97	virtual status_t stop();
98	virtual sp<MetaData> getFormat();
99	virtual status_t read(MediaBuffer **buffer, const ReadOptions *options = NULL);
100	int GetReadedBytes();
101	int SetReadedBytes(int size);
102	int MediaSourceRead_buffer(unsigned char *buffer, int size);
103	fp_read_buffer fpread_buffer;
104
105	//----------------------------------------
106	DSPerr bsod_init(DSPshort * p_pkbuf, DSPshort pkbitptr, BSOD_BSTRM *p_bstrm);
107	DSPerr bsod_unprj(BSOD_BSTRM *p_bstrm, DSPshort *p_data, DSPshort numbits);
108	int Get_ChNum_DD(void *buf);
109	int Get_ChNum_DDP(void *buf);
110	DSPerr bsod_skip(BSOD_BSTRM *p_bstrm, DSPshort numbits);
111	DSPerr bsid_getbsid(BSOD_BSTRM *p_inbstrm, DSPshort *p_bsid);
112	int Get_ChNum_AC3_Frame(void *buf);
113	//---------------------------------------
114
115	int sample_rate;
116	int ChNum;
117	int frame_size;
118	int64_t bytes_readed_sum_pre;
119	int64_t bytes_readed_sum;
120	int *pStop_ReadBuf_Flag;
121	protected:
122	virtual ~AudioMediaSource();
123
124	private:
125	bool mStarted;
126	sp<DataSource> mDataSource;
127	sp<MetaData> mMeta;
128	MediaBufferGroup *mGroup;
129	int64_t mCurrentTimeUs;
130	int mBytesReaded;
131
132	AudioMediaSource(const AudioMediaSource &);
133	AudioMediaSource &operator=(const AudioMediaSource &);
134	};
135
136
137	}
138