mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 07:42:17 +00:00
0f886c7aff
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@1114 b3059339-0415-0410-9bf9-f77b7e298cf2
165 lines
3.2 KiB
C
165 lines
3.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include "audio_out.h"
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#include "audio_out_internal.h"
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static ao_info_t info =
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{
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"RAW PCM/WAVE file writer audio output",
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"pcm",
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"Atmosfear",
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""
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};
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LIBAO_EXTERN(pcm)
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// there are some globals:
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// ao_samplerate
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// ao_channels
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// ao_format
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// ao_bps
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// ao_outburst
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// ao_buffersize
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char *ao_outputfilename = NULL;
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int ao_pcm_waveheader = 1;
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#define WAV_ID_RIFF 0x46464952 /* "RIFF" */
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#define WAV_ID_WAVE 0x45564157 /* "WAVE" */
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#define WAV_ID_FMT 0x20746d66 /* "fmt " */
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#define WAV_ID_DATA 0x61746164 /* "data" */
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#define WAV_ID_PCM 0x0001
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struct WaveHeader
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{
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unsigned long riff;
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unsigned long file_length;
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unsigned long wave;
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unsigned long fmt;
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unsigned long fmt_length;
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short fmt_tag;
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short channels;
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unsigned long sample_rate;
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unsigned long bytes_per_second;
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short block_align;
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short bits;
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unsigned long data;
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unsigned long data_length;
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};
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static struct WaveHeader wavhdr = {
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WAV_ID_RIFF,
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0x00000000,
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WAV_ID_WAVE,
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WAV_ID_FMT,
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16,
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WAV_ID_PCM,
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2,
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44100,
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192000,
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4,
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16,
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WAV_ID_DATA,
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0x00000000
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};
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static FILE *fp = NULL;
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// to set/get/query special features/parameters
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static int control(int cmd,int arg){
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return -1;
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}
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// open & setup audio device
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// return: 1=success 0=fail
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static int init(int rate,int channels,int format,int flags){
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if(!ao_outputfilename) {
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ao_outputfilename = (char *) malloc(sizeof(char) * 14);
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strcpy(ao_outputfilename,(ao_pcm_waveheader ? "audiodump.wav" : "audiodump.pcm"));
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}
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wavhdr.channels = channels;
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wavhdr.sample_rate = rate;
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wavhdr.bytes_per_second = rate * (format / 8) * channels;
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wavhdr.bits = format;
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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));
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printf("PCM: Info - fastest dumping is achieved with -vo null -hardframedrop.\n");
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printf("PCM: Info - to write WAVE files use -waveheader (default), for RAW PCM -nowaveheader.\n");
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fp = fopen(ao_outputfilename, "wb");
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ao_outburst = 4096;
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if(fp) {
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if(ao_pcm_waveheader) /* Reserve space for wave header */
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fseek(fp, sizeof(wavhdr), SEEK_SET);
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return 1;
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}
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printf("PCM: Failed to open %s for writing!\n", ao_outputfilename);
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return 0;
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}
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// close audio device
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static void uninit(){
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if(ao_pcm_waveheader){ /* Write wave header */
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wavhdr.file_length = wavhdr.data_length + sizeof(wavhdr);
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fseek(fp, 0, SEEK_SET);
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fwrite(&wavhdr,sizeof(wavhdr),1,fp);
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}
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fclose(fp);
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free(ao_outputfilename);
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(){
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}
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// stop playing, keep buffers (for pause)
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static void audio_pause()
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{
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// for now, just call reset();
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reset();
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}
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// resume playing, after audio_pause()
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static void audio_resume()
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{
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}
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// return: how many bytes can be played without blocking
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static int get_space(){
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return ao_outburst;
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}
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// plays 'len' bytes of 'data'
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// it should round it down to outburst*n
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// return: number of bytes played
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static int play(void* data,int len,int flags){
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//printf("PCM: Writing chunk!\n");
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fwrite(data,len,1,fp);
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if(ao_pcm_waveheader)
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wavhdr.data_length += len;
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return len;
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}
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// return: how many unplayed bytes are in the buffer
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static int get_delay(){
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return 0;
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}
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