GithubStar/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv.git synced 2026-10-28 23:13:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

PCM audio

Browse Source 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2584 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi
2001-10-31 00:25:28 +00:00
parent d9c101e012
commit 7048edd86f
1 changed files with 208 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mencoder.c
+208 -11
View File
@@ -1,6 +1,7 @@
#define VCODEC_DIVX4 1
#define ACODEC_VBRMP3 1
#define ACODEC_PCM 1
#define ACODEC_VBRMP3 2
#include <stdio.h>
#include <stdlib.h>
@@ -27,6 +28,95 @@
#include "get_path.c"
//--------------------------
static int tabsel_123[2][3][16] = {
{ {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
{0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
{0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
{ {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
};
static long freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
/*
* decode a header and write the information
* into the frame structure
*/
static int decode_header(unsigned char* hbuf){
int stereo,ssize,crc,lsf,mpeg25,framesize,padding,bitrate_index,sampling_frequency;
unsigned long newhead =
hbuf[0] << 24 |
hbuf[1] << 16 |
hbuf[2] << 8 |
hbuf[3];
// printf("head=0x%08X\n",newhead);
#if 1
// head_check:
if( (newhead & 0xffe00000) != 0xffe00000 ||
(newhead & 0x0000fc00) == 0x0000fc00){
printf("head_check failed\n");
return -1;
}
#endif
if((4-((newhead>>17)&3))!=3){ printf("not layer-3\n"); return -1;}
if( newhead & ((long)1<<20) ) {
lsf = (newhead & ((long)1<<19)) ? 0x0 : 0x1;
mpeg25 = 0;
} else {
lsf = 1;
mpeg25 = 1;
}
if(mpeg25)
sampling_frequency = 6 + ((newhead>>10)&0x3);
else
sampling_frequency = ((newhead>>10)&0x3) + (lsf*3);
if(sampling_frequency>8){
printf("invalid sampling_frequency\n");
return -1; // valid: 0..8
}
crc = ((newhead>>16)&0x1)^0x1;
bitrate_index = ((newhead>>12)&0xf);
padding = ((newhead>>9)&0x1);
// fr->extension = ((newhead>>8)&0x1);
// fr->mode = ((newhead>>6)&0x3);
// fr->mode_ext = ((newhead>>4)&0x3);
// fr->copyright = ((newhead>>3)&0x1);
// fr->original = ((newhead>>2)&0x1);
// fr->emphasis = newhead & 0x3;
stereo = ( (((newhead>>6)&0x3)) == 3) ? 1 : 2;
if(!bitrate_index){
fprintf(stderr,"Free format not supported.\n");
return -1;
}
if(lsf)
ssize = (stereo == 1) ? 9 : 17;
else
ssize = (stereo == 1) ? 17 : 32;
if(crc) ssize += 2;
framesize = (long) tabsel_123[lsf][2][bitrate_index] * 144000;
framesize /= freqs[sampling_frequency]<<lsf;
framesize += padding;
// if(framesize<=0 || framesize>MAXFRAMESIZE) return FALSE;
return framesize;
}
//--------------------------
// cache2:
@@ -50,7 +140,7 @@ int video_family=-1; // override video codec family
//void skip_audio_frame(sh_audio_t *sh_audio){}
//void resync_audio_stream(sh_audio_t *sh_audio){}
int verbose=5; // must be global!
int verbose=1; // must be global!
double video_time_usage=0;
double vout_time_usage=0;
@@ -133,6 +223,8 @@ ENC_FRAME enc_frame;
ENC_RESULT enc_result;
void* enc_handle=NULL;
//lame_global_flags *lame;
float audio_preload=0.3;
//int out_buffer_size=0x200000;
@@ -149,8 +241,8 @@ float audio_preload=0.3;
if(argc>1)
stream=open_stream(argv[1],0,&file_format);
else
// stream=open_stream("/3d/abcug/Weird AL - Amish Paradise (MUSIC VIDEO).mpeg",0,&file_format);
stream=open_stream("/3d/divx/405divx_sm_v2[1].avi",0,&file_format);
stream=open_stream("/3d/abcug/Weird AL - Amish Paradise (MUSIC VIDEO).mpeg",0,&file_format);
// stream=open_stream("/3d/divx/405divx_sm_v2[1].avi",0,&file_format);
// stream=open_stream("/dev/cdrom",2,&file_format); // VCD track 2
if(!stream){
@@ -325,7 +417,7 @@ mux_a->buffer=malloc(mux_a->buffer_size);
mux_a->source=sh_audio;
//mux_a->codec=ACODEC_VBRMP3; // 0=streamcopy
mux_a->codec=ACODEC_PCM; // 0=streamcopy
switch(mux_a->codec){
case 0:
@@ -334,6 +426,20 @@ case 0:
mux_a->h.dwRate=sh_audio->audio.dwRate;
mux_a->wf=sh_audio->wf;
break;
case ACODEC_PCM:
printf("CBR PCM audio selected\n");
mux_a->h.dwSampleSize=2*sh_audio->channels;
mux_a->h.dwScale=1;
mux_a->h.dwRate=sh_audio->samplerate;
mux_a->wf=malloc(sizeof(WAVEFORMATEX));
mux_a->wf->nBlockAlign=mux_a->h.dwSampleSize;
mux_a->wf->wFormatTag=0x1; // PCM
mux_a->wf->nChannels=sh_audio->channels;
mux_a->wf->nSamplesPerSec=sh_audio->samplerate;
mux_a->wf->nAvgBytesPerSec=mux_a->h.dwSampleSize*mux_a->wf->nSamplesPerSec;
mux_a->wf->wBitsPerSample=16;
mux_a->wf->cbSize=0; // FIXME for l3codeca.acm
break;
case ACODEC_VBRMP3:
mux_a->h.dwSampleSize=0; // VBR
mux_a->h.dwScale=4608;
@@ -350,6 +456,7 @@ case ACODEC_VBRMP3:
}
}
printf("Writting AVI header...\n");
aviwrite_write_header(muxer,muxer_f);
switch(mux_v->codec){
@@ -377,6 +484,33 @@ case VCODEC_DIVX4:
break;
}
#if 0
switch(mux_a->codec){
case ACODEC_VBRMP3:
lame=lame_init();
//lame_set_bWriteVbrTag(lame,0);
lame_set_in_samplerate(lame,sh_audio->samplerate);
lame_set_num_channels(lame,mux_a->wf->nChannels);
lame_set_out_samplerate(lame,mux_a->h.dwRate);
lame_set_quality(lame,0); // best q
//lame_set_mode(lame,JOINT_STEREO); // j-st
//lame_set_brate(lame,64);
//lame_set_compression_ratio(lame,20);
lame_set_VBR(lame,vbr_default); // ???
//lame_set_VBR(lame,vbr_abr); // ???
lame_set_VBR_q(lame,6); // 1 = best vbr q 6=~128k
//lame_set_VBR_mean_bitrate_kbps(lame,128);
lame_init_params(lame);
lame_print_config(lame);
lame_print_internals(lame);
}
#endif
signal(SIGINT,exit_sighandler); // Interrupt from keyboard
signal(SIGQUIT,exit_sighandler); // Quit from keyboard
signal(SIGTERM,exit_sighandler); // kill
@@ -392,22 +526,85 @@ while(!eof){
if(sh_audio){
// get audio:
if(mux_a->timer-audio_preload<mux_v->timer){
while(mux_a->timer-audio_preload<mux_v->timer){
// copy 0.5 sec of audio
int len;
if(mux_a->h.dwSampleSize){
// CBR
len=sh_audio->i_bps/2;
len/=mux_a->h.dwSampleSize;if(len<1) len=1;
len*=mux_a->h.dwSampleSize;
switch(mux_a->codec){
case 0: // copy
len=sh_audio->i_bps/2;
len/=mux_a->h.dwSampleSize;if(len<1) len=1;
len*=mux_a->h.dwSampleSize;
len=demux_read_data(sh_audio->ds,mux_a->buffer,len);
break;
case ACODEC_PCM:
// printf("Decode!\n");
len=mux_a->h.dwSampleSize*(mux_a->h.dwRate/2);
if(len>sh_audio->a_buffer_size) len=sh_audio->a_buffer_size;
if(len>sh_audio->a_buffer_len){
int ret=decode_audio(sh_audio,
&sh_audio->a_buffer[sh_audio->a_buffer_len],
len-sh_audio->a_buffer_len,
sh_audio->a_buffer_size-sh_audio->a_buffer_len);
if(ret>0) sh_audio->a_buffer_len+=ret;
// printf("ret=%d \n",ret);
}
if(len>sh_audio->a_buffer_len) len=sh_audio->a_buffer_len;
memcpy(mux_a->buffer,sh_audio->a_buffer,len);
sh_audio->a_buffer_len-=len;
if(sh_audio->a_buffer_len>0)
memcpy(sh_audio->a_buffer,&sh_audio->a_buffer[len],sh_audio->a_buffer_len);
break;
#if 0
case ACODEC_VBRMP3:
while(mux_a->buffer_len<4){
len=2304;
if(sh_audio->a_buffer_len<len){
int ret=decode_audio(sh_audio,
&sh_audio->a_buffer[sh_audio->a_buffer_len],
len-sh_audio->a_buffer_len,
sh_audio->a_buffer_size-sh_audio->a_buffer_len);
if(ret>0) sh_audio->a_buffer_len+=ret; else break;
}
if(len<
mux_a->buffer_len+=lame_encode_buffer_interleaved(lame,
sh_audio->a_buffer,mux_a->buffer)
}
int len=fread(buffer,1,buff_size,f);
if(len<=0) break;
outbuf_len+=lame_encode_buffer_interleaved(lame,buffer,len/4,outbuf+outbuf_len,outbuf_size-outbuf_len);
}
len=decode_header(outbuf);
if(len<=0){
printf("ERROR!\n");
len=1; // skip 1 byte
outbuf_len-=len; memcpy(outbuf,outbuf+len,outbuf_len);
continue;
}
printf("len=%4d %02X %02X %02X %02X\n",len,outbuf[0],outbuf[1],outbuf[2],outbuf[3]);
while(outbuf_len<len){
int len=fread(buffer,1,buff_size,f);
if(len<=0) break;
outbuf_len+=lame_encode_buffer_interleaved(lame,buffer,len/4,outbuf+outbuf_len,outbuf_size-outbuf_len);
}
fwrite(outbuf,len,1,f2);
outbuf_len-=len; memcpy(outbuf,outbuf+len,outbuf_len);
#endif
}
// printf("%d -> ",len);
len=demux_read_data(sh_audio->ds,mux_a->buffer,len);
// printf("%d \n",len);
} else {
// VBR
printf("not yet implemented!\n");
}
if(len>0) aviwrite_write_chunk(muxer,mux_a,muxer_f,len,0);
if(len<=0) break; // EOF?
aviwrite_write_chunk(muxer,mux_a,muxer_f,len,0);
}
}