mirror of
https://github.com/mpv-player/mpv
synced 2024-12-17 04:15:13 +00:00
242aa6ebd4
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3096 b3059339-0415-0410-9bf9-f77b7e298cf2
157 lines
3.2 KiB
C
157 lines
3.2 KiB
C
#include <stdio.h>
|
|
#include <stdlib.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)
|
|
|
|
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;
|
|
};
|
|
|
|
|
|
static struct WaveHeader wavhdr = {
|
|
WAV_ID_RIFF,
|
|
0x00000000,
|
|
WAV_ID_WAVE,
|
|
WAV_ID_FMT,
|
|
16,
|
|
WAV_ID_PCM,
|
|
2,
|
|
44100,
|
|
192000,
|
|
4,
|
|
16,
|
|
WAV_ID_DATA,
|
|
0x00000000
|
|
};
|
|
|
|
static FILE *fp = NULL;
|
|
|
|
// to set/get/query special features/parameters
|
|
static int control(int cmd,int arg){
|
|
return -1;
|
|
}
|
|
|
|
// open & setup audio device
|
|
// return: 1=success 0=fail
|
|
static int init(int rate,int channels,int format,int flags){
|
|
if(!ao_outputfilename) {
|
|
ao_outputfilename = (char *) malloc(sizeof(char) * 14);
|
|
strcpy(ao_outputfilename,(ao_pcm_waveheader ? "audiodump.wav" : "audiodump.pcm"));
|
|
}
|
|
|
|
wavhdr.channels = channels;
|
|
wavhdr.sample_rate = rate;
|
|
wavhdr.bytes_per_second = rate * (format / 8) * channels;
|
|
wavhdr.bits = format;
|
|
|
|
printf("PCM: File: %s (%s) 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 -vo null -hardframedrop.\n");
|
|
printf("PCM: Info - to write WAVE files use -waveheader (default), for RAW PCM -nowaveheader.\n");
|
|
fp = fopen(ao_outputfilename, "wb");
|
|
|
|
ao_data.outburst = 4096;
|
|
|
|
|
|
if(fp) {
|
|
if(ao_pcm_waveheader) /* Reserve space for wave header */
|
|
fseek(fp, sizeof(wavhdr), SEEK_SET);
|
|
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){ /* Write wave header */
|
|
wavhdr.file_length = wavhdr.data_length + sizeof(wavhdr);
|
|
fseek(fp, 0, SEEK_SET);
|
|
fwrite(&wavhdr,sizeof(wavhdr),1,fp);
|
|
}
|
|
fclose(fp);
|
|
free(ao_outputfilename);
|
|
}
|
|
|
|
// 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(){
|
|
|
|
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){
|
|
|
|
//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;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|