mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 08:29:42 +00:00
203cf520da
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5776 b3059339-0415-0410-9bf9-f77b7e298cf2
191 lines
5.0 KiB
C
191 lines
5.0 KiB
C
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
#include "ad_internal.h"
|
|
|
|
#ifdef HAVE_OGGVORBIS
|
|
|
|
static ad_info_t info =
|
|
{
|
|
"Ogg/Vorbis audio decoder",
|
|
"libvorbis",
|
|
AFM_VORBIS,
|
|
"Felix Buenemann, A'rpi",
|
|
"libvorbis",
|
|
"buggy"
|
|
};
|
|
|
|
LIBAD_EXTERN(vorbis)
|
|
|
|
#include <math.h>
|
|
#include <vorbis/codec.h>
|
|
|
|
// This struct is also defined in demux_ogg.c => common header ?
|
|
typedef struct ov_struct_st {
|
|
vorbis_info vi; /* struct that stores all the static vorbis bitstream
|
|
settings */
|
|
vorbis_comment vc; /* struct that stores all the bitstream user comments */
|
|
vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
|
|
vorbis_block vb; /* local working space for packet->PCM decode */
|
|
} ov_struct_t;
|
|
|
|
static int preinit(sh_audio_t *sh)
|
|
{
|
|
sh->audio_out_minsize=1024*4; // 1024 samples/frame
|
|
return 1;
|
|
}
|
|
|
|
static int init(sh_audio_t *sh)
|
|
{
|
|
ogg_packet op;
|
|
vorbis_comment vc;
|
|
struct ov_struct_st *ov;
|
|
int error(void) {
|
|
vorbis_comment_clear(&vc);
|
|
vorbis_info_clear(&ov->vi);
|
|
free(ov);
|
|
return 0;
|
|
}
|
|
/// Init the decoder with the 3 header packets
|
|
ov = (struct ov_struct_st*)malloc(sizeof(struct ov_struct_st));
|
|
vorbis_info_init(&ov->vi);
|
|
vorbis_comment_init(&vc);
|
|
op.bytes = ds_get_packet(sh->ds,&op.packet);
|
|
op.b_o_s = 1;
|
|
/// Header
|
|
if(vorbis_synthesis_headerin(&ov->vi,&vc,&op) <0) {
|
|
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"OggVorbis: initial (identification) header broken!\n");
|
|
return error();
|
|
}
|
|
op.bytes = ds_get_packet(sh->ds,&op.packet);
|
|
op.b_o_s = 0;
|
|
/// Comments
|
|
if(vorbis_synthesis_headerin(&ov->vi,&vc,&op) <0) {
|
|
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"OggVorbis: comment header broken!\n");
|
|
return error();
|
|
}
|
|
op.bytes = ds_get_packet(sh->ds,&op.packet);
|
|
//// Codebook
|
|
if(vorbis_synthesis_headerin(&ov->vi,&vc,&op)<0) {
|
|
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: codebook header broken!\n");
|
|
return error();;
|
|
} else { /// Print the infos
|
|
char **ptr=vc.user_comments;
|
|
while(*ptr){
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbisComment: %s\n",*ptr);
|
|
++ptr;
|
|
}
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Bitstream is %d channel, %dHz, %dbit/s %cBR\n",(int)ov->vi.channels,(int)ov->vi.rate,(int)ov->vi.bitrate_nominal,
|
|
(ov->vi.bitrate_lower!=ov->vi.bitrate_nominal)||(ov->vi.bitrate_upper!=ov->vi.bitrate_nominal)?'V':'C');
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Encoded by: %s\n",vc.vendor);
|
|
}
|
|
vorbis_comment_clear(&vc);
|
|
|
|
// printf("lower=%d upper=%d \n",(int)ov->vi.bitrate_lower,(int)ov->vi.bitrate_upper);
|
|
|
|
// Setup the decoder
|
|
sh->channels=ov->vi.channels;
|
|
sh->samplerate=ov->vi.rate;
|
|
// assume 128kbit if bitrate not specified in the header
|
|
sh->i_bps=((ov->vi.bitrate_nominal>0) ? ov->vi.bitrate_nominal : 128000)/8;
|
|
sh->context = ov;
|
|
|
|
/// Finish the decoder init
|
|
vorbis_synthesis_init(&ov->vd,&ov->vi);
|
|
vorbis_block_init(&ov->vd,&ov->vb);
|
|
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Init OK!\n");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void uninit(sh_audio_t *sh)
|
|
{
|
|
struct ov_struct_st *ov = sh->context;
|
|
vorbis_block_clear(&ov->vb);
|
|
vorbis_info_clear(&ov->vi);
|
|
free(ov);
|
|
}
|
|
|
|
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
|
|
{
|
|
switch(cmd)
|
|
{
|
|
#if 0
|
|
case ADCTRL_RESYNC_STREAM:
|
|
return CONTROL_TRUE;
|
|
case ADCTRL_SKIP_FRAME:
|
|
return CONTROL_TRUE;
|
|
#endif
|
|
}
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
|
|
static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen)
|
|
{
|
|
int len = 0;
|
|
int samples;
|
|
float **pcm;
|
|
ogg_packet op;
|
|
struct ov_struct_st *ov = sh->context;
|
|
op.b_o_s = op.e_o_s = 0;
|
|
while(len < minlen) {
|
|
op.bytes = ds_get_packet(sh->ds,&op.packet);
|
|
if(!op.packet)
|
|
break;
|
|
if(vorbis_synthesis(&ov->vb,&op)==0) /* test for success! */
|
|
vorbis_synthesis_blockin(&ov->vd,&ov->vb);
|
|
while((samples=vorbis_synthesis_pcmout(&ov->vd,&pcm))>0){
|
|
int i,j;
|
|
int clipflag=0;
|
|
int convsize=(maxlen-len)/(2*ov->vi.channels); // max size!
|
|
int bout=(samples<convsize?samples:convsize);
|
|
|
|
if(bout<=0) break;
|
|
|
|
/* convert floats to 16 bit signed ints (host order) and
|
|
interleave */
|
|
for(i=0;i<ov->vi.channels;i++){
|
|
ogg_int16_t *convbuffer=(ogg_int16_t *)(&buf[len]);
|
|
ogg_int16_t *ptr=convbuffer+i;
|
|
float *mono=pcm[i];
|
|
for(j=0;j<bout;j++){
|
|
#if 1
|
|
int val=mono[j]*32767.f;
|
|
#else /* optional dither */
|
|
int val=mono[j]*32767.f+drand48()-0.5f;
|
|
#endif
|
|
/* might as well guard against clipping */
|
|
if(val>32767){
|
|
val=32767;
|
|
clipflag=1;
|
|
}
|
|
if(val<-32768){
|
|
val=-32768;
|
|
clipflag=1;
|
|
}
|
|
*ptr=val;
|
|
ptr+=ov->vi.channels;
|
|
}
|
|
}
|
|
|
|
if(clipflag)
|
|
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"Clipping in frame %ld\n",(long)(ov->vd.sequence));
|
|
len+=2*ov->vi.channels*bout;
|
|
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\n[decoded: %d / %d ]\n",bout,samples);
|
|
vorbis_synthesis_read(&ov->vd,bout); /* tell libvorbis how
|
|
many samples we
|
|
actually consumed */
|
|
}
|
|
}
|
|
|
|
|
|
|
|
return len;
|
|
}
|
|
|
|
#endif /* !HAVE_OGGVORBIS */
|
|
|