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#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
{
unsigned long riff;
unsigned long file_length;
unsigned long wave;
unsigned long fmt;
unsigned long fmt_length;
short fmt_tag;
short channels;
unsigned long sample_rate;
unsigned long bytes_per_second;
short block_align;
short bits;
unsigned long data;
unsigned long 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(){
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;
}
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