diff options
Diffstat (limited to 'libmpcodecs/ad_dk3adpcm.c')
-rw-r--r-- | libmpcodecs/ad_dk3adpcm.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libmpcodecs/ad_dk3adpcm.c b/libmpcodecs/ad_dk3adpcm.c new file mode 100644 index 0000000000..a6de3d96e1 --- /dev/null +++ b/libmpcodecs/ad_dk3adpcm.c @@ -0,0 +1,60 @@ +#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; +} |