diff options
Diffstat (limited to 'libmpcodecs/ad_pcm.c')
-rw-r--r-- | libmpcodecs/ad_pcm.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libmpcodecs/ad_pcm.c b/libmpcodecs/ad_pcm.c new file mode 100644 index 0000000000..67ce5cba5a --- /dev/null +++ b/libmpcodecs/ad_pcm.c @@ -0,0 +1,66 @@ +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "config.h" +#include "ad_internal.h" + +static ad_info_t info = +{ + "Uncompressed PCM audio decoder", + "pcm", + AFM_PCM, + "Nick Kurshev", + "A'rpi", + "" +}; + +LIBAD_EXTERN(pcm) + +static int init(sh_audio_t *sh_audio) +{ + WAVEFORMATEX *h=sh_audio->wf; + sh_audio->i_bps=h->nAvgBytesPerSec; + sh_audio->channels=h->nChannels; + sh_audio->samplerate=h->nSamplesPerSec; + sh_audio->samplesize=(h->wBitsPerSample+7)/8; + switch(sh_audio->format){ /* hardware formats: */ + case 0x6: sh_audio->sample_format=AFMT_A_LAW;break; + case 0x7: sh_audio->sample_format=AFMT_MU_LAW;break; + case 0x11: sh_audio->sample_format=AFMT_IMA_ADPCM;break; + case 0x50: sh_audio->sample_format=AFMT_MPEG;break; + case 0x736F7774: sh_audio->sample_format=AFMT_S16_LE;sh_audio->codec->driver=AFM_DVDPCM;break; +/* case 0x2000: sh_audio->sample_format=AFMT_AC3; */ + default: sh_audio->sample_format=(sh_audio->samplesize==2)?AFMT_S16_LE:AFMT_U8; + } + return 1; +} + +static int preinit(sh_audio_t *sh) +{ + sh->audio_out_minsize=2048; + return 1; +} + +static void uninit(sh_audio_t *sh) +{ +} + +static int control(sh_audio_t *sh,int cmd,void* arg, ...) +{ + int skip; + switch(cmd) + { + case ADCTRL_SKIP_FRAME: + skip=sh->i_bps/16; + skip=skip&(~3); + demux_read_data(sh->ds,NULL,skip); + return CONTROL_TRUE; + } + return CONTROL_UNKNOWN; +} + +static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen) +{ + return demux_read_data(sh_audio->ds,buf,minlen); +} |