mirror of https://github.com/mpv-player/mpv
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <math.h>
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#include "config.h"
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#ifdef HAVE_LIBDV095
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#include "img_format.h"
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#include <libdv/dv.h>
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#include <libdv/dv_types.h>
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#include "stream.h"
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#include "demuxer.h"
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#include "stheader.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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"Raw DV Audio Decoder",
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"libdv",
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"Alexander Neundorf <neundorf@kde.org>",
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"http://libdv.sf.net",
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""
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};
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LIBAD_EXTERN(libdv)
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// defined in vd_libdv.c:
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dv_decoder_t* init_global_rawdv_decoder();
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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=4*DV_AUDIO_MAX_SAMPLES*2;
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return 1;
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}
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static int16_t *audioBuffers[4]={NULL,NULL,NULL,NULL};
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static int init(sh_audio_t *sh)
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{
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int i;
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WAVEFORMATEX *h=sh->wf;
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if(!h) return 0;
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sh->i_bps=h->nAvgBytesPerSec;
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sh->channels=h->nChannels;
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sh->samplerate=h->nSamplesPerSec;
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sh->samplesize=(h->wBitsPerSample+7)/8;
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sh->context=init_global_rawdv_decoder();
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for (i=0; i < 4; i++)
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audioBuffers[i] = malloc(2*DV_AUDIO_MAX_SAMPLES);
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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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int i;
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for (i=0; i < 4; i++)
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free(audioBuffers[i]);
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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 *audio, unsigned char *buf, int minlen, int maxlen)
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{
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int len=0;
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dv_decoder_t* decoder=audio->context; //global_rawdv_decoder;
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unsigned char* dv_audio_frame=NULL;
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int xx=ds_get_packet(audio->ds,&dv_audio_frame);
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if(xx<=0 || !dv_audio_frame) return 0; // EOF?
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dv_parse_header(decoder, dv_audio_frame);
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if(xx!=decoder->frame_size)
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printf("warning! audio framesize differs! read=%d hdr=%d \n",
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xx, decoder->frame_size);
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if (dv_decode_full_audio(decoder, dv_audio_frame,(int16_t**) audioBuffers))
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{
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/* Interleave the audio into a single buffer */
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int i=0;
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int16_t *bufP=(int16_t*)buf;
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// printf("samples=%d/%d chans=%d mem=%d \n",decoder->audio->samples_this_frame,DV_AUDIO_MAX_SAMPLES,
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// decoder->audio->num_channels, decoder->audio->samples_this_frame*decoder->audio->num_channels*2);
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// return (44100/30)*4;
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for (i=0; i < decoder->audio->samples_this_frame; i++)
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{
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int ch;
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for (ch=0; ch < decoder->audio->num_channels; ch++)
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bufP[len++] = audioBuffers[ch][i];
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}
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}
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return len*2;
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}
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#endif
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