1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*____________________________________________________________________________
FreeAmp - The Free MP3 Player
Portions Copyright (C) 1998-1999 EMusic.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
____________________________________________________________________________*/
#ifndef INCLUDED_XINGLMC_H_
#define INCLUDED_XINGLMC_H_
/* system headers */
#include <stdlib.h>
#include <time.h>
/* project headers */
#include "config.h"
#include "pmi.h"
#include "pmo.h"
#include "mutex.h"
#include "event.h"
#include "lmc.h"
#include "thread.h"
#include "mutex.h"
#include "queue.h"
#include "semaphore.h"
extern "C"
{
#include "mhead.h"
#include "port.h"
}
#define BS_BUFBYTES 60000U
#define PCM_BUFBYTES 60000U
typedef struct
{
int (*decode_init) (MPEG_HEAD * h, int framebytes_arg,
int reduction_code, int transform_code,
int convert_code, int freq_limit);
void (*decode_info) (DEC_INFO * info);
IN_OUT(*decode) (unsigned char *bs, short *pcm);
}
AUDIO;
#define FRAMES_FLAG 0x0001
#define BYTES_FLAG 0x0002
#define TOC_FLAG 0x0004
#define VBR_SCALE_FLAG 0x0008
#define FRAMES_AND_BYTES (FRAMES_FLAG | BYTES_FLAG)
// structure to receive extracted header
// toc may be NULL
typedef struct
{
int h_id; // from MPEG header, 0=MPEG2, 1=MPEG1
int samprate; // determined from MPEG header
int flags; // from Xing header data
int frames; // total bit stream frames from Xing header data
int bytes; // total bit stream bytes from Xing header data
int vbr_scale; // encoded vbr scale from Xing header data
unsigned char *toc; // pointer to unsigned char toc_buffer[100]
// may be NULL if toc not desired
} XHEADDATA;
enum
{
lmcError_MinimumError = 1000,
lmcError_DecodeFailed,
lmcError_AudioDecodeInitFailed,
lmcError_DecoderThreadFailed,
lmcError_PMIError,
lmcError_PMOError,
lmcError_MaximumError
};
class XingLMC:public LogicalMediaConverter
{
public:
XingLMC(FAContext *context);
virtual ~XingLMC();
virtual uint32 CalculateSongLength(const char *url);
virtual Error ChangePosition(int32 position);
virtual Error CanDecode();
virtual void Clear();
virtual Error ExtractMediaInfo();
virtual void SetPMI(PhysicalMediaInput *pmi) { m_pPmi = pmi; };
virtual void SetPMO(PhysicalMediaOutput *pmo) { m_pPmo = pmo; };
virtual Error Prepare(PullBuffer *pInputBuffer, PullBuffer *&pOutBuffer);
virtual Error InitDecoder();
virtual Error SetEQData(float *);
virtual Error SetEQData(bool);
virtual vector<char *> *GetExtensions(void);
private:
static void DecodeWorkerThreadFunc(void *);
void DecodeWork();
Error BeginRead(void *&pBuffer, unsigned int iBytesNeeded,
bool bBufferUp = true);
Error BlockingBeginRead(void *&pBuffer,
unsigned int iBytesNeeded);
Error EndRead(size_t iBytesUsed);
Error AdvanceBufferToNextFrame();
Error GetHeadInfo();
Error GetBitstreamStats(float &fTotalSeconds, float &fMsPerFrame,
int &iTotalFrames, int &iSampleRate,
int &iLayer);
int GetXingHeader(XHEADDATA *X, unsigned char *buf);
int SeekPoint(unsigned char TOC[100], int file_bytes, float percent);
int ExtractI4(unsigned char *buf);
PhysicalMediaInput *m_pPmi;
PhysicalMediaOutput *m_pPmo;
int m_iMaxWriteSize;
int32 m_frameBytes, m_iBufferUpInterval, m_iBufferSize;
size_t m_lFileSize;
MPEG_HEAD m_sMpegHead;
int32 m_iBitRate;
bool m_bBufferingUp;
Thread *m_decoderThread;
int32 m_frameCounter;
time_t m_iBufferUpdate;
char *m_szUrl;
const char *m_szError;
AUDIO m_audioMethods;
XHEADDATA *m_pXingHeader;
// These vars are used for a nasty hack.
FILE *m_fpFile;
char *m_pLocalReadBuffer;
};
#endif /* _XINGLMC_H */
|