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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "ad_internal.h"
static ad_info_t info =
{
"Duck DK3 ADPCM decoder",
"dk3adpcm",
AFM_DK3ADPCM,
"Nick Kurshev",
"Mike Melanson",
"This format number was used by Duck Corp. but not officially registered with Microsoft"
};
LIBAD_EXTERN(dk3adpcm)
#include "adpcm.h"
static int init(sh_audio_t *sh_audio)
{
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=DK3_ADPCM_BLOCK_SIZE*
(sh_audio->channels*sh_audio->samplerate) / DK3_ADPCM_SAMPLES_PER_BLOCK;
return 1;
}
static int preinit(sh_audio_t *sh_audio)
{
sh_audio->audio_out_minsize=DK3_ADPCM_SAMPLES_PER_BLOCK * 4;
sh_audio->ds->ss_div=DK3_ADPCM_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_mul=DK3_ADPCM_BLOCK_SIZE;
return 1;
}
static void uninit(sh_audio_t *sh)
{
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
{
// TODO!
return CONTROL_UNKNOWN;
}
static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
int len=-1;
unsigned char ibuf[DK3_ADPCM_BLOCK_SIZE * 2]; /* bytes / stereo frame */
if (demux_read_data(sh_audio->ds, ibuf,
DK3_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) !=
DK3_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels)
return len; /* EOF */
len = 2 * dk3_adpcm_decode_block(
(unsigned short*)buf,ibuf);
return len;
}
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