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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "m_option.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
extern int demuxer_type;
static int channels = 2;
static int samplerate = 44100;
static int samplesize = 2;
static int bitrate = 0;
static int format = 0x1; // Raw PCM
m_option_t demux_rawaudio_opts[] = {
{ "channels", &channels, CONF_TYPE_INT,CONF_RANGE,1,8, NULL },
{ "rate", &samplerate, CONF_TYPE_INT,CONF_RANGE,1000,8*48000, NULL },
{ "samplesize", &samplesize, CONF_TYPE_INT,CONF_RANGE,1,8, NULL },
{ "bitrate", &bitrate, CONF_TYPE_INT,CONF_MIN,0,0, NULL },
{ "format", &format, CONF_TYPE_INT, CONF_MIN, 0 , 0, NULL },
{NULL, NULL, 0, 0, 0, 0, NULL}
};
static demuxer_t* demux_rawaudio_open(demuxer_t* demuxer) {
sh_audio_t* sh_audio;
WAVEFORMATEX* w;
sh_audio = new_sh_audio(demuxer,0);
sh_audio->wf = w = (WAVEFORMATEX*)malloc(sizeof(WAVEFORMATEX));
w->wFormatTag = sh_audio->format = format;
w->nChannels = sh_audio->channels = channels;
w->nSamplesPerSec = sh_audio->samplerate = samplerate;
if (bitrate > 999)
w->nAvgBytesPerSec = bitrate/8;
else if (bitrate > 0)
w->nAvgBytesPerSec = bitrate*125;
else
w->nAvgBytesPerSec = samplerate*samplesize*channels;
w->nBlockAlign = channels*samplesize;
sh_audio->samplesize = samplesize;
w->wBitsPerSample = 8*samplesize;
w->cbSize = 0;
demuxer->movi_start = demuxer->stream->start_pos;
demuxer->movi_end = demuxer->stream->end_pos;
demuxer->audio->sh = sh_audio;
sh_audio->ds = demuxer->audio;
return demuxer;
}
static int demux_rawaudio_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
sh_audio_t* sh_audio = demuxer->audio->sh;
int l = sh_audio->wf->nAvgBytesPerSec;
off_t spos = stream_tell(demuxer->stream);
demux_packet_t* dp;
if(demuxer->stream->eof)
return 0;
dp = new_demux_packet(l);
dp->pts = (spos - demuxer->movi_start) / (float)(sh_audio->wf->nAvgBytesPerSec);
dp->pos = (spos - demuxer->movi_start);
l = stream_read(demuxer->stream,dp->buffer,l);
resize_demux_packet(dp, l);
ds_add_packet(ds,dp);
return 1;
}
static void demux_rawaudio_seek(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
stream_t* s = demuxer->stream;
sh_audio_t* sh_audio = demuxer->audio->sh;
off_t base,pos;
base = (flags & 1) ? demuxer->movi_start : stream_tell(s);
if(flags & 2)
pos = base + ((demuxer->movi_end - demuxer->movi_start)*rel_seek_secs);
else
pos = base + (rel_seek_secs*sh_audio->i_bps);
pos -= (pos % (sh_audio->channels * sh_audio->samplesize) );
stream_seek(s,pos);
sh_audio->delay= (pos-ds_tell_pts(demuxer->audio)-sh_audio->a_in_buffer_len) / (float)(sh_audio->wf->nAvgBytesPerSec);
// printf("demux_rawaudio: streamtell=%d\n",(int)stream_tell(demuxer->stream));
}
demuxer_desc_t demuxer_desc_rawaudio = {
"Raw audio demuxer",
"rawaudio",
"rawaudio",
"?",
"",
DEMUXER_TYPE_RAWAUDIO,
0, // no autodetect
NULL,
demux_rawaudio_fill_buffer,
demux_rawaudio_open,
NULL,
demux_rawaudio_seek,
NULL
};
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