mirror of https://github.com/mpv-player/mpv
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include "../m_option.h"
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#include "stream.h"
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#include "demuxer.h"
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#include "stheader.h"
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extern int demuxer_type;
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static int channels = 2;
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static int samplerate = 44100;
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static int samplesize = 2;
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static int bitrate = 0;
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static int format = 0x1; // Raw PCM
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m_option_t demux_rawaudio_opts[] = {
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{ "on", &demuxer_type, CONF_TYPE_FLAG, 0,0, DEMUXER_TYPE_RAWAUDIO, NULL },
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{ "channels", &channels, CONF_TYPE_INT,CONF_RANGE,1,8, NULL },
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{ "rate", &samplerate, CONF_TYPE_INT,CONF_RANGE,1000,8*48000, NULL },
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{ "samplesize", &samplesize, CONF_TYPE_INT,CONF_RANGE,1,8, NULL },
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{ "bitrate", &bitrate, CONF_TYPE_INT,CONF_MIN,0,0, NULL },
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{ "format", &format, CONF_TYPE_INT, CONF_MIN, 0 , 0, NULL },
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{NULL, NULL, 0, 0, 0, 0, NULL}
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};
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extern void resync_audio_stream(sh_audio_t *sh_audio);
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int demux_rawaudio_open(demuxer_t* demuxer) {
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sh_audio_t* sh_audio;
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WAVEFORMATEX* w;
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sh_audio = new_sh_audio(demuxer,0);
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sh_audio->wf = w = (WAVEFORMATEX*)malloc(sizeof(WAVEFORMATEX));
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w->wFormatTag = sh_audio->format = format;
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w->nChannels = sh_audio->channels = channels;
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w->nSamplesPerSec = sh_audio->samplerate = samplerate;
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if (bitrate > 999)
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w->nAvgBytesPerSec = bitrate/8;
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else if (bitrate > 0)
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w->nAvgBytesPerSec = bitrate*125;
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else
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w->nAvgBytesPerSec = samplerate*samplesize*channels;
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w->nBlockAlign = channels*samplesize;
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sh_audio->samplesize = samplesize;
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w->wBitsPerSample = 8*samplesize;
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w->cbSize = 0;
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demuxer->movi_start = demuxer->stream->start_pos;
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demuxer->movi_end = demuxer->stream->end_pos;
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demuxer->audio->sh = sh_audio;
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sh_audio->ds = demuxer->audio;
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return 1;
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}
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int demux_rawaudio_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
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sh_audio_t* sh_audio = demuxer->audio->sh;
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int l = sh_audio->wf->nAvgBytesPerSec;
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off_t spos = stream_tell(demuxer->stream);
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demux_packet_t* dp;
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if(demuxer->stream->eof)
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return 0;
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dp = new_demux_packet(l);
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dp->pts = (spos - demuxer->movi_start) / (float)(sh_audio->wf->nAvgBytesPerSec);
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dp->pos = (spos - demuxer->movi_start);
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l = stream_read(demuxer->stream,dp->buffer,l);
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resize_demux_packet(dp, l);
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ds_add_packet(ds,dp);
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return 1;
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}
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void demux_rawaudio_seek(demuxer_t *demuxer,float rel_seek_secs,int flags){
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stream_t* s = demuxer->stream;
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sh_audio_t* sh_audio = demuxer->audio->sh;
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off_t base,pos;
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base = (flags & 1) ? demuxer->movi_start : stream_tell(s);
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if(flags & 2)
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pos = base + ((demuxer->movi_end - demuxer->movi_start)*rel_seek_secs);
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else
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pos = base + (rel_seek_secs*sh_audio->i_bps);
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pos -= (pos % (sh_audio->channels * sh_audio->samplesize) );
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stream_seek(s,pos);
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sh_audio->delay= (pos-ds_tell_pts(demuxer->audio)-sh_audio->a_in_buffer_len) / (float)(sh_audio->wf->nAvgBytesPerSec);
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resync_audio_stream(sh_audio);
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// printf("demux_rawaudio: streamtell=%d\n",(int)stream_tell(demuxer->stream));
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}
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