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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <math.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "img_format.h"
#include <libdv/dv.h>
#include <libdv/dv_types.h>
#include "stream/stream.h"
#include "libmpdemux/demuxer.h"
#include "libmpdemux/stheader.h"
#include "ad_internal.h"
static ad_info_t info =
{
"Raw DV Audio Decoder",
"libdv",
"Alexander Neundorf <neundorf@kde.org>",
"http://libdv.sf.net",
""
};
LIBAD_EXTERN(libdv)
// defined in vd_libdv.c:
dv_decoder_t* init_global_rawdv_decoder(void);
static int preinit(sh_audio_t *sh_audio)
{
sh_audio->audio_out_minsize=4*DV_AUDIO_MAX_SAMPLES*2;
return 1;
}
static int16_t *audioBuffers[4]={NULL,NULL,NULL,NULL};
static int init(sh_audio_t *sh)
{
int i;
WAVEFORMATEX *h=sh->wf;
if(!h) return 0;
sh->i_bps=h->nAvgBytesPerSec;
sh->channels=h->nChannels;
sh->samplerate=h->nSamplesPerSec;
sh->samplesize=(h->wBitsPerSample+7)/8;
sh->context=init_global_rawdv_decoder();
for (i=0; i < 4; i++)
audioBuffers[i] = malloc(2*DV_AUDIO_MAX_SAMPLES);
return 1;
}
static void uninit(sh_audio_t *sh_audio)
{
int i;
for (i=0; i < 4; i++)
free(audioBuffers[i]);
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
{
// TODO!!!
return CONTROL_UNKNOWN;
}
static int decode_audio(sh_audio_t *audio, unsigned char *buf, int minlen, int maxlen)
{
int len=0;
dv_decoder_t* decoder=audio->context; //global_rawdv_decoder;
unsigned char* dv_audio_frame=NULL;
int xx=ds_get_packet(audio->ds,&dv_audio_frame);
if(xx<=0 || !dv_audio_frame) return 0; // EOF?
dv_parse_header(decoder, dv_audio_frame);
if(xx!=decoder->frame_size)
mp_msg(MSGT_GLOBAL,MSGL_WARN,MSGTR_MPCODECS_AudioFramesizeDiffers,
xx, decoder->frame_size);
if (dv_decode_full_audio(decoder, dv_audio_frame,(int16_t**) audioBuffers))
{
/* Interleave the audio into a single buffer */
int i=0;
int16_t *bufP=(int16_t*)buf;
// printf("samples=%d/%d chans=%d mem=%d \n",decoder->audio->samples_this_frame,DV_AUDIO_MAX_SAMPLES,
// decoder->audio->num_channels, decoder->audio->samples_this_frame*decoder->audio->num_channels*2);
// return (44100/30)*4;
for (i=0; i < decoder->audio->samples_this_frame; i++)
{
int ch;
for (ch=0; ch < decoder->audio->num_channels; ch++)
bufP[len++] = audioBuffers[ch][i];
}
}
return len*2;
}
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