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
167
168
169
170
171
172
173
174
175
|
/********************************************************
DirectShow audio decoder
Copyright 2001 Eugene Kuznetsov (divx@euro.ru)
*********************************************************/
#include "DS_AudioDecoder.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define __MODULE__ "DirectShow audio decoder"
const GUID FORMAT_WaveFormatEx = {
0x05589f81, 0xc356, 0x11CE,
{ 0xBF, 0x01, 0x00, 0xAA, 0x00, 0x55, 0x59, 0x5A }
};
const GUID MEDIATYPE_Audio = {
0x73647561, 0x0000, 0x0010,
{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
};
const GUID MEDIASUBTYPE_PCM = {
0x00000001, 0x0000, 0x0010,
{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
};
typedef long STDCALL (*GETCLASS) (GUID*, GUID*, void**);
DS_AudioDecoder * DS_AudioDecoder_Create(const CodecInfo * info, const WAVEFORMATEX* wf)
{
DS_AudioDecoder *this;
int sz;
WAVEFORMATEX* pWF;
this = malloc(sizeof(DS_AudioDecoder));
sz = 18 + wf->cbSize;
this->m_sVhdr = malloc(sz);
memcpy(this->m_sVhdr, wf, sz);
this->m_sVhdr2 = malloc(sz);
memcpy(this->m_sVhdr2, this->m_sVhdr, sz);
pWF = (WAVEFORMATEX*)this->m_sVhdr2;
pWF->wFormatTag = 1;
pWF->wBitsPerSample = 16;
pWF->nBlockAlign = 2*pWF->nChannels;
pWF->cbSize = 0;
memcpy(&this->in_fmt,wf,sizeof(WAVEFORMATEX));
memset(&this->m_sOurType, 0, sizeof(this->m_sOurType));
this->m_sOurType.majortype=MEDIATYPE_Audio;
this->m_sOurType.subtype=MEDIASUBTYPE_PCM;
this->m_sOurType.subtype.f1=wf->wFormatTag;
this->m_sOurType.formattype=FORMAT_WaveFormatEx;
this->m_sOurType.lSampleSize=wf->nBlockAlign;
this->m_sOurType.bFixedSizeSamples=1;
this->m_sOurType.bTemporalCompression=0;
this->m_sOurType.pUnk=0;
this->m_sOurType.cbFormat=sz;
this->m_sOurType.pbFormat=this->m_sVhdr;
memset(&this->m_sDestType, 0, sizeof(this->m_sDestType));
this->m_sDestType.majortype=MEDIATYPE_Audio;
this->m_sDestType.subtype=MEDIASUBTYPE_PCM;
this->m_sDestType.subtype.f1=pWF->wFormatTag;
this->m_sDestType.formattype=FORMAT_WaveFormatEx;
this->m_sDestType.bFixedSizeSamples=1;
this->m_sDestType.bTemporalCompression=0;
this->m_sDestType.lSampleSize=2*wf->nChannels;
this->m_sDestType.pUnk=0;
this->m_sDestType.cbFormat=pWF->cbSize;
this->m_sDestType.pbFormat=this->m_sVhdr2;
/*try*/
{
ALLOCATOR_PROPERTIES props, props1;
this->m_pDS_Filter = DS_Filter_Create((const char*)info->dll, &info->guid, &this->m_sOurType, &this->m_sDestType);
if( !this->m_pDS_Filter ) {
free(this);
return NULL;
}
DS_Filter_Start(this->m_pDS_Filter);
props.cBuffers=1;
props.cbBuffer=this->m_sOurType.lSampleSize;
props.cbAlign=props.cbPrefix=0;
this->m_pDS_Filter->m_pAll->vt->SetProperties(this->m_pDS_Filter->m_pAll, &props, &props1);
this->m_pDS_Filter->m_pAll->vt->Commit(this->m_pDS_Filter->m_pAll);
}
/*
catch (FatalError& e)
{
e.PrintAll();
delete[] m_sVhdr;
delete[] m_sVhdr2;
delete m_pDS_Filter;
throw;
}
*/
return this;
}
void DS_AudioDecoder_Destroy(DS_AudioDecoder *this)
{
free(this->m_sVhdr);
free(this->m_sVhdr2);
DS_Filter_Destroy(this->m_pDS_Filter);
free(this);
}
int DS_AudioDecoder_Convert(DS_AudioDecoder *this, const void* in_data, uint_t in_size,
void* out_data, uint_t out_size,
uint_t* size_read, uint_t* size_written)
{
uint_t written = 0;
uint_t read = 0;
if (!in_data || !out_data)
return -1;
in_size -= in_size%this->in_fmt.nBlockAlign;
while (in_size>0)
{
uint_t frame_size = 0;
char* frame_pointer;
IMediaSample* sample=0;
char* ptr;
int result;
// this->m_pOurOutput->SetFramePointer(out_data+written);
COutputPin_SetFramePointer(this->m_pDS_Filter->m_pOurOutput,&frame_pointer);
COutputPin_SetFrameSizePointer(this->m_pDS_Filter->m_pOurOutput,(long*)&frame_size);
this->m_pDS_Filter->m_pAll->vt->GetBuffer(this->m_pDS_Filter->m_pAll, &sample, 0, 0, 0);
if (!sample)
{
Debug printf("DS_AudioDecoder::Convert() Error: null sample\n");
break;
}
sample->vt->GetPointer(sample, (BYTE **)&ptr);
memcpy(ptr, (const uint8_t*)in_data + read, this->in_fmt.nBlockAlign);
sample->vt->SetActualDataLength(sample, this->in_fmt.nBlockAlign);
sample->vt->SetSyncPoint(sample, 1);
sample->vt->SetPreroll(sample, 0);
result = this->m_pDS_Filter->m_pImp->vt->Receive(this->m_pDS_Filter->m_pImp, sample);
if (result)
Debug printf("DS_AudioDecoder::Convert() Error: putting data into input pin %x\n", result);
if ((written + frame_size) > out_size)
{
sample->vt->Release((IUnknown*)sample);
break;
}
memcpy((uint8_t*)out_data + written, frame_pointer, frame_size);
sample->vt->Release((IUnknown*)sample);
read+=this->in_fmt.nBlockAlign;
written+=frame_size;
}
if (size_read)
*size_read = read;
if (size_written)
*size_written = written;
return 0;
}
int DS_AudioDecoder_GetSrcSize(DS_AudioDecoder *this, int dest_size)
{
double efficiency =(double) this->in_fmt.nAvgBytesPerSec
/ (this->in_fmt.nSamplesPerSec*this->in_fmt.nBlockAlign);
int frames = (int)(dest_size*efficiency);;
if (frames < 1)
frames = 1;
return frames * this->in_fmt.nBlockAlign;
}
|
