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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bswap.h"
#include "afmt.h"
#include "audio_out.h"
#include "audio_out_internal.h"
static ao_info_t info =
{
"RAW PCM/WAVE file writer audio output",
"pcm",
"Atmosfear",
""
};
LIBAO_EXTERN(pcm)
extern int vo_pts;
char *ao_outputfilename = NULL;
int ao_pcm_waveheader = 1;
#define WAV_ID_RIFF 0x46464952 /* "RIFF" */
#define WAV_ID_WAVE 0x45564157 /* "WAVE" */
#define WAV_ID_FMT 0x20746d66 /* "fmt " */
#define WAV_ID_DATA 0x61746164 /* "data" */
#define WAV_ID_PCM 0x0001
struct WaveHeader
{
uint32_t riff;
uint32_t file_length;
uint32_t wave;
uint32_t fmt;
uint32_t fmt_length;
uint16_t fmt_tag;
uint16_t channels;
uint32_t sample_rate;
uint32_t bytes_per_second;
uint16_t block_align;
uint16_t bits;
uint32_t data;
uint32_t data_length;
};
/* init with default values */
static struct WaveHeader wavhdr = {
le2me_32(WAV_ID_RIFF),
/* same conventions than in sox/wav.c/wavwritehdr() */
0, //le2me_32(0x7ffff024),
le2me_32(WAV_ID_WAVE),
le2me_32(WAV_ID_FMT),
le2me_32(16),
le2me_16(WAV_ID_PCM),
le2me_16(2),
le2me_32(44100),
le2me_32(192000),
le2me_16(4),
le2me_16(16),
le2me_32(WAV_ID_DATA),
0, //le2me_32(0x7ffff000)
};
static FILE *fp = NULL;
// to set/get/query special features/parameters
static int control(int cmd,void *arg){
return -1;
}
// open & setup audio device
// return: 1=success 0=fail
static int init(int rate,int channels,int format,int flags){
int bits;
if(!ao_outputfilename) {
ao_outputfilename = strdup(ao_pcm_waveheader ? "audiodump.wav" : "audiodump.pcm");
}
/* bits is only equal to format if (format == 8) or (format == 16);
this means that the following "if" is a kludge and should
really be a switch to be correct in all cases */
bits=8;
switch(format){
case AFMT_S8:
format=AFMT_U8;
case AFMT_U8:
break;
default:
format=AFMT_S16_LE;
bits=16;
break;
}
ao_data.outburst = 65536;
ao_data.buffersize= 2*65536;
ao_data.channels=channels;
ao_data.samplerate=rate;
ao_data.format=format;
ao_data.bps=channels*rate*(bits/8);
wavhdr.channels = le2me_16(ao_data.channels);
wavhdr.sample_rate = le2me_32(ao_data.samplerate);
wavhdr.bytes_per_second = le2me_32(ao_data.bps);
wavhdr.bits = le2me_16(bits);
wavhdr.data_length=le2me_32(0x7ffff000);
wavhdr.file_length = wavhdr.data_length + sizeof(wavhdr) - 8;
printf("PCM: File: %s (%s)\n"
"PCM: Samplerate: %iHz Channels: %s Format %s\n",
ao_outputfilename, (ao_pcm_waveheader?"WAVE":"RAW PCM"), rate,
(channels > 1) ? "Stereo" : "Mono", audio_out_format_name(format));
printf("PCM: Info: fastest dumping is achieved with -vc dummy -vo null\n"
"PCM: Info: to write WAVE files use -waveheader (default); "
"for RAW PCM -nowaveheader.\n");
fp = fopen(ao_outputfilename, "wb");
if(fp) {
if(ao_pcm_waveheader){ /* Reserve space for wave header */
fwrite(&wavhdr,sizeof(wavhdr),1,fp);
wavhdr.file_length=wavhdr.data_length=0;
}
return 1;
}
printf("PCM: Failed to open %s for writing!\n", ao_outputfilename);
return 0;
}
// close audio device
static void uninit(int immed){
if(ao_pcm_waveheader && fseek(fp, 0, SEEK_SET) == 0){ /* Write wave header */
wavhdr.file_length = wavhdr.data_length + sizeof(wavhdr) - 8;
wavhdr.file_length = le2me_32(wavhdr.file_length);
wavhdr.data_length = le2me_32(wavhdr.data_length);
fwrite(&wavhdr,sizeof(wavhdr),1,fp);
}
fclose(fp);
}
// stop playing and empty buffers (for seeking/pause)
static void reset(){
}
// stop playing, keep buffers (for pause)
static void audio_pause()
{
// for now, just call reset();
reset();
}
// resume playing, after audio_pause()
static void audio_resume()
{
}
// return: how many bytes can be played without blocking
static int get_space(){
if(vo_pts)
return ao_data.pts < vo_pts ? ao_data.outburst : 0;
return ao_data.outburst;
}
// plays 'len' bytes of 'data'
// it should round it down to outburst*n
// return: number of bytes played
static int play(void* data,int len,int flags){
// let libaf to do the conversion...
#if 0
//#ifdef WORDS_BIGENDIAN
if (ao_data.format == AFMT_S16_LE) {
unsigned short *buffer = (unsigned short *) data;
register int i;
for(i = 0; i < len/2; ++i) {
buffer[i] = le2me_16(buffer[i]);
}
}
#endif
//printf("PCM: Writing chunk!\n");
fwrite(data,len,1,fp);
if(ao_pcm_waveheader)
wavhdr.data_length += len;
return len;
}
// return: delay in seconds between first and last sample in buffer
static float get_delay(){
return 0.0;
}
|
