mirror of
https://github.com/mpv-player/mpv
synced 2025-01-16 03:51:48 +00:00
18f583efc7
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5351 b3059339-0415-0410-9bf9-f77b7e298cf2
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "ad_internal.h"
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static ad_info_t info =
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{
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"MS ADPCM audio decoder",
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"msadpcm",
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AFM_MSADPCM,
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"Nick Kurshev",
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"Mike Melanson",
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""
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};
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LIBAD_EXTERN(msadpcm)
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#define MS_ADPCM_PREAMBLE_SIZE 7
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static int preinit(sh_audio_t *sh_audio)
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{
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sh_audio->audio_out_minsize = sh_audio->wf->nBlockAlign * 4;
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sh_audio->ds->ss_div =
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(sh_audio->wf->nBlockAlign - MS_ADPCM_PREAMBLE_SIZE) * 2;
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sh_audio->ds->ss_mul = sh_audio->wf->nBlockAlign;
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return 1;
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}
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static int init(sh_audio_t *sh_audio)
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{
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sh_audio->channels=sh_audio->wf->nChannels;
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sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
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sh_audio->i_bps = sh_audio->wf->nBlockAlign *
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(sh_audio->channels*sh_audio->samplerate) / sh_audio->ds->ss_div;
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if ((sh_audio->a_in_buffer =
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(unsigned char *)malloc(sh_audio->ds->ss_mul)) == NULL)
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return 0;
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return 1;
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}
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static void uninit(sh_audio_t *sh_audio)
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{
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free(sh_audio->a_in_buffer);
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}
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static int control(sh_audio_t *sh,int cmd,void* arg, ...)
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{
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// TODO!!!
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return CONTROL_UNKNOWN;
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}
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static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
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{
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if (demux_read_data(sh_audio->ds, sh_audio->a_in_buffer,
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sh_audio->ds->ss_mul) !=
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sh_audio->ds->ss_mul)
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return -1; /* EOF */
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return 2 * ms_adpcm_decode_block(
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(unsigned short*)buf, sh_audio->a_in_buffer,
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sh_audio->wf->nChannels, sh_audio->wf->nBlockAlign);
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}
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