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mpv/dec_audio.c

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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "libao2/afmt.h"
extern int verbose; // defined in mplayer.c
#ifdef USE_FAKE_MONO
int fakemono=0;
#endif
#include "stream.h"
#include "demuxer.h"
#include "codec-cfg.h"
#include "stheader.h"
#include "dll_init.h"
#include "mp3lib/mp3.h"
#include "libac3/ac3.h"
#include "alaw.h"
#include "xa/xa_gsm.h"
#include "ac3-iec958.h"
#include "ima4.h"
#ifdef USE_DIRECTSHOW
#include "loader/DirectShow/DS_AudioDec.h"
#endif
#ifdef HAVE_OGGVORBIS
/* XXX is math.h really needed? - atmos */
#include <math.h>
#include <vorbis/codec.h>
typedef struct ov_struct_st {
ogg_sync_state oy; /* sync and verify incoming physical bitstream */
ogg_stream_state os; /* take physical pages, weld into a logical
stream of packets */
ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */
ogg_packet op; /* one raw packet of data for decode */
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;
#endif
#ifdef USE_LIBAVCODEC
#include "libavcodec/avcodec.h"
static AVCodec *lavc_codec=NULL;
static AVCodecContext lavc_context;
extern int avcodec_inited;
#endif
#ifdef USE_LIBMAD
#include <mad.h>
static struct mad_stream mad_stream;
static struct mad_frame mad_frame;
static struct mad_synth mad_synth;
// ensure buffer is filled with some data
static void mad_prepare_buffer(sh_audio_t* sh_audio, struct mad_stream* ms, int length)
{
if(sh_audio->a_in_buffer_len < length) {
int len = demux_read_data(sh_audio->ds, sh_audio->a_in_buffer+sh_audio->a_in_buffer_len, length-sh_audio->a_in_buffer_len);
sh_audio->a_in_buffer_len += len;
}
}
static void mad_postprocess_buffer(sh_audio_t* sh_audio, struct mad_stream* ms)
{
int delta = (unsigned char*)ms->next_frame - (unsigned char *)sh_audio->a_in_buffer;
if(delta != 0) {
sh_audio->a_in_buffer_len -= delta;
memcpy(sh_audio->a_in_buffer, ms->next_frame, sh_audio->a_in_buffer_len);
}
}
static inline
signed short mad_scale(mad_fixed_t sample)
{
/* round */
sample += (1L << (MAD_F_FRACBITS - 16));
/* clip */
if (sample >= MAD_F_ONE)
sample = MAD_F_ONE - 1;
else if (sample < -MAD_F_ONE)
sample = -MAD_F_ONE;
/* quantize */
return sample >> (MAD_F_FRACBITS + 1 - 16);
}
#endif
int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen);
static sh_audio_t* dec_audio_sh=NULL;
// AC3 decoder buffer callback:
static void ac3_fill_buffer(uint8_t **start,uint8_t **end){
int len=ds_get_packet(dec_audio_sh->ds,start);
//printf("<ac3:%d>\n",len);
if(len<0)
*start = *end = NULL;
else
*end = *start + len;
}
// MP3 decoder buffer callback:
int mplayer_audio_read(char *buf,int size){
int len;
len=demux_read_data(dec_audio_sh->ds,buf,size);
return len;
}
int init_audio(sh_audio_t *sh_audio){
int driver=sh_audio->codec->driver;
sh_audio->samplesize=2;
#if WORDS_BIGENDIAN
sh_audio->sample_format=AFMT_S16_BE;
#else
sh_audio->sample_format=AFMT_S16_LE;
#endif
sh_audio->samplerate=0;
//sh_audio->pcm_bswap=0;
sh_audio->o_bps=0;
sh_audio->a_buffer_size=0;
sh_audio->a_buffer=NULL;
sh_audio->a_in_buffer_len=0;
// setup required min. in/out buffer size:
sh_audio->audio_out_minsize=8192;// default size, maybe not enough for Win32/ACM
switch(driver){
case AFM_ACM:
#ifndef USE_WIN32DLL
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_NoACMSupport);
driver=0;
#else
// Win32 ACM audio codec:
if(init_acm_audio_codec(sh_audio)){
sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
sh_audio->channels=sh_audio->o_wf.nChannels;
sh_audio->samplerate=sh_audio->o_wf.nSamplesPerSec;
// if(sh_audio->audio_out_minsize>16384) sh_audio->audio_out_minsize=16384;
// sh_audio->a_buffer_size=sh_audio->audio_out_minsize;
// if(sh_audio->a_buffer_size<sh_audio->audio_out_minsize+MAX_OUTBURST)
// sh_audio->a_buffer_size=sh_audio->audio_out_minsize+MAX_OUTBURST;
} else {
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_ACMiniterror);
driver=0;
}
#endif
break;
case AFM_DSHOW:
#ifndef USE_DIRECTSHOW
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_NoDShowAudio);
driver=0;
#else
// Win32 DShow audio codec:
// printf("DShow_audio: channs=%d rate=%d\n",sh_audio->channels,sh_audio->samplerate);
if(DS_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf)){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingDLLcodec,sh_audio->codec->dll);
driver=0;
} else {
sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->audio_in_minsize=2*sh_audio->wf->nBlockAlign;
if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
sh_audio->a_in_buffer_size=sh_audio->audio_in_minsize;
sh_audio->a_in_buffer=malloc(sh_audio->a_in_buffer_size);
sh_audio->a_in_buffer_len=0;
sh_audio->audio_out_minsize=16384;
}
#endif
break;
case AFM_VORBIS:
#ifndef HAVE_OGGVORBIS
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_NoOggVorbis);
driver=0;
#else
/* OggVorbis audio via libvorbis, compatible with files created by nandub and zorannt codec */
sh_audio->audio_out_minsize=1024*4; // 1024 samples/frame
#endif
break;
case AFM_PCM:
case AFM_DVDPCM:
case AFM_ALAW:
// PCM, aLaw
sh_audio->audio_out_minsize=2048;
break;
case AFM_AC3:
// Dolby AC3 audio:
sh_audio->audio_out_minsize=4*256*6;
break;
case AFM_HWAC3:
// Dolby AC3 audio:
sh_audio->audio_out_minsize=4*256*6;
sh_audio->sample_format = AFMT_AC3;
break;
case AFM_GSM:
// MS-GSM audio codec:
sh_audio->audio_out_minsize=4*320;
break;
case AFM_IMA4:
// IMA-ADPCM 4:1 audio codec:
sh_audio->audio_out_minsize=4096; //4*IMA4_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_div=IMA4_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_mul=IMA4_BLOCK_SIZE;
break;
case AFM_MPEG:
// MPEG Audio:
sh_audio->audio_out_minsize=4608;
break;
case AFM_FFMPEG:
#ifndef USE_LIBAVCODEC
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_NoLAVCsupport);
return 0;
#else
// FFmpeg Audio:
sh_audio->audio_out_minsize=AVCODEC_MAX_AUDIO_FRAME_SIZE;
break;
#endif
#ifdef USE_LIBMAD
case AFM_MAD:
printf(__FILE__ ":%d:mad: setting minimum outputsize\n", __LINE__);
sh_audio->audio_out_minsize=4608;
if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
sh_audio->a_in_buffer_size=sh_audio->audio_in_minsize;
sh_audio->a_in_buffer=malloc(sh_audio->a_in_buffer_size);
sh_audio->a_in_buffer_len=0;
break;
#endif
}
if(!driver) return 0;
// allocate audio out buffer:
sh_audio->a_buffer_size=sh_audio->audio_out_minsize+MAX_OUTBURST; // worst case calc.
mp_msg(MSGT_DECAUDIO,MSGL_V,"dec_audio: Allocating %d + %d = %d bytes for output buffer\n",
sh_audio->audio_out_minsize,MAX_OUTBURST,sh_audio->a_buffer_size);
sh_audio->a_buffer=malloc(sh_audio->a_buffer_size);
if(!sh_audio->a_buffer){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_CantAllocAudioBuf);
return 0;
}
memset(sh_audio->a_buffer,0,sh_audio->a_buffer_size);
sh_audio->a_buffer_len=0;
switch(driver){
#ifdef USE_WIN32DLL
case AFM_ACM: {
int ret=acm_decode_audio(sh_audio,sh_audio->a_buffer,4096,sh_audio->a_buffer_size);
if(ret<0){
mp_msg(MSGT_DECAUDIO,MSGL_INFO,"ACM decoding error: %d\n",ret);
driver=0;
}
sh_audio->a_buffer_len=ret;
break;
}
#endif
case AFM_PCM: {
// AVI PCM 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 0x2000: sh_audio->sample_format=AFMT_AC3;
default: sh_audio->sample_format=(sh_audio->samplesize==2)?AFMT_S16_LE:AFMT_U8;
}
break;
}
case AFM_DVDPCM: {
// DVD PCM Audio:
sh_audio->channels=2;
sh_audio->samplerate=48000;
sh_audio->i_bps=2*2*48000;
// sh_audio->pcm_bswap=1;
break;
}
case AFM_AC3: {
// Dolby AC3 audio:
dec_audio_sh=sh_audio; // save sh_audio for the callback:
ac3_config.fill_buffer_callback = ac3_fill_buffer;
ac3_config.num_output_ch = 2;
ac3_config.flags = 0;
#ifdef HAVE_MMX
ac3_config.flags |= AC3_MMX_ENABLE;
#endif
#ifdef HAVE_3DNOW
ac3_config.flags |= AC3_3DNOW_ENABLE;
#endif
ac3_init();
sh_audio->ac3_frame = ac3_decode_frame();
if(sh_audio->ac3_frame){
ac3_frame_t* fr=(ac3_frame_t*)sh_audio->ac3_frame;
sh_audio->samplerate=fr->sampling_rate;
sh_audio->channels=2;
// 1 frame: 6*256 samples 1 sec: sh_audio->samplerate samples
//sh_audio->i_bps=fr->frame_size*fr->sampling_rate/(6*256);
sh_audio->i_bps=fr->bit_rate*(1000/8);
} else {
driver=0; // bad frame -> disable audio
}
break;
}
case AFM_HWAC3: {
unsigned char *buffer;
struct hwac3info ai;
int len, skipped;
len = ds_get_packet(sh_audio->ds, &buffer); // maybe 1 packet is not enough,
// at least for mpeg, PS packets contain about max. 2000 bytes of data.
if(ac3_iec958_parse_syncinfo(buffer, len, &ai, &skipped) < 0) {
mp_msg(MSGT_DECAUDIO,MSGL_ERR, MSGTR_AC3notvalid);
driver = 0;
break;
}
if(ai.samplerate != 48000) {
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_AC3only48k);
driver = 0;
break;
}
sh_audio->samplerate=ai.samplerate;
sh_audio->samplesize=ai.framesize;
sh_audio->channels=1;
sh_audio->i_bps=ai.bitrate*(1000/8);
sh_audio->ac3_frame=malloc(6144);
sh_audio->o_bps=sh_audio->i_bps; // XXX FIXME!!! XXX
break;
}
case AFM_ALAW: {
// aLaw audio codec:
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=sh_audio->channels*sh_audio->samplerate;
break;
}
#ifdef USE_LIBAVCODEC
case AFM_FFMPEG: {
int x;
mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
if(!avcodec_inited){
avcodec_init();
avcodec_register_all();
avcodec_inited=1;
}
lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh_audio->codec->dll);
if(!lavc_codec){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingLAVCcodec,sh_audio->codec->dll);
return 0;
}
memset(&lavc_context, 0, sizeof(lavc_context));
/* open it */
if (avcodec_open(&lavc_context, lavc_codec) < 0) {
mp_msg(MSGT_DECAUDIO,MSGL_ERR, MSGTR_CantOpenCodec);
return 0;
}
mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec init OK!\n");
// Decode at least 1 byte: (to get header filled)
x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
if(x>0) sh_audio->a_buffer_len=x;
#if 1
sh_audio->channels=lavc_context.channels;
sh_audio->samplerate=lavc_context.sample_rate;
sh_audio->i_bps=lavc_context.bit_rate/8;
#else
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
#endif
break;
}
#endif
case AFM_GSM: {
// MS-GSM audio codec:
GSM_Init();
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
// decodes 65 byte -> 320 short
// 1 sec: sh_audio->channels*sh_audio->samplerate samples
// 1 frame: 320 samples
sh_audio->i_bps=65*(sh_audio->channels*sh_audio->samplerate)/320; // 1:10
break;
}
case AFM_IMA4: {
// IMA-ADPCM 4:1 audio codec:
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
// decodes 34 byte -> 64 short
sh_audio->i_bps=IMA4_BLOCK_SIZE*(sh_audio->channels*sh_audio->samplerate)/IMA4_SAMPLES_PER_BLOCK; // 1:4
break;
}
case AFM_MPEG: {
// MPEG Audio:
dec_audio_sh=sh_audio; // save sh_audio for the callback:
#ifdef USE_FAKE_MONO
MP3_Init(fakemono);
#else
MP3_Init();
#endif
MP3_samplerate=MP3_channels=0;
// printf("[\n");
sh_audio->a_buffer_len=MP3_DecodeFrame(sh_audio->a_buffer,-1);
// printf("]\n");
sh_audio->channels=2; // hack
sh_audio->samplerate=MP3_samplerate;
sh_audio->i_bps=MP3_bitrate*(1000/8);
break;
}
#ifdef HAVE_OGGVORBIS
case AFM_VORBIS: {
// OggVorbis Audio:
#if 0 /* just here for reference - atmos */
ogg_sync_state oy; /* sync and verify incoming physical bitstream */
ogg_stream_state os; /* take physical pages, weld into a logical
stream of packets */
ogg_page og; /* one Ogg bitstream page. Vorbis packets are inside */
ogg_packet op; /* one raw packet of data for decode */
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 */
#else
/* nix, nada, rien, nothing, nem, n<>x */
#endif
uint32_t hdrsizes[3];/* stores vorbis header sizes from AVI audio header,
maybe use ogg_uint32_t */
//int i;
int ret;
char *buffer;
ogg_packet hdr;
//ov_struct_t *s=&sh_audio->ov;
sh_audio->ov=malloc(sizeof(ov_struct_t));
//s=&sh_audio->ov;
vorbis_info_init(&sh_audio->ov->vi);
vorbis_comment_init(&sh_audio->ov->vc);
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"OggVorbis: cbsize: %i\n", sh_audio->wf->cbSize);
memcpy(hdrsizes, ((unsigned char*)sh_audio->wf)+2*sizeof(WAVEFORMATEX), 3*sizeof(uint32_t));
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"OggVorbis: Read header sizes: initial: %i comment: %i codebook: %i\n", hdrsizes[0], hdrsizes[1], hdrsizes[2]);
/*for(i=12; i <= 40; i+=2) { // header bruteforce :)
memcpy(hdrsizes, ((unsigned char*)sh_audio->wf)+i, 3*sizeof(uint32_t));
printf("OggVorbis: Read header sizes (%i): %ld %ld %ld\n", i, hdrsizes[0], hdrsizes[1], hdrsizes[2]);
}*/
/* read headers */ // FIXME disable sound on errors here, we absolutely need this headers! - atmos
hdr.packet=NULL;
hdr.b_o_s = 1; /* beginning of stream for first packet */
hdr.bytes = hdrsizes[0];
hdr.packet = realloc(hdr.packet,hdr.bytes);
memcpy(hdr.packet,((unsigned char*)sh_audio->wf)+2*sizeof(WAVEFORMATEX)+3*sizeof(uint32_t),hdr.bytes);
if(vorbis_synthesis_headerin(&sh_audio->ov->vi,&sh_audio->ov->vc,&hdr)<0)
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: initial (identification) header broken!\n");
hdr.b_o_s = 0;
hdr.bytes = hdrsizes[1];
hdr.packet = realloc(hdr.packet,hdr.bytes);
memcpy(hdr.packet,((unsigned char*)sh_audio->wf)+2*sizeof(WAVEFORMATEX)+3*sizeof(uint32_t)+hdrsizes[0],hdr.bytes);
if(vorbis_synthesis_headerin(&sh_audio->ov->vi,&sh_audio->ov->vc,&hdr)<0)
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: comment header broken!\n");
hdr.bytes = hdrsizes[2];
hdr.packet = realloc(hdr.packet,hdr.bytes);
memcpy(hdr.packet,((unsigned char*)sh_audio->wf)+2*sizeof(WAVEFORMATEX)+3*sizeof(uint32_t)+hdrsizes[0]+hdrsizes[1],hdr.bytes);
if(vorbis_synthesis_headerin(&sh_audio->ov->vi,&sh_audio->ov->vc,&hdr)<0)
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: codebook header broken!\n");
hdr.bytes=0;
hdr.packet = realloc(hdr.packet,hdr.bytes); /* free */
/* done with the headers */
/* Throw the comments plus a few lines about the bitstream we're
decoding */
{
char **ptr=sh_audio->ov->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, %ldHz, %ldkbit/s %cBR\n",sh_audio->ov->vi.channels,sh_audio->ov->vi.rate,sh_audio->ov->vi.bitrate_nominal/1000, (sh_audio->ov->vi.bitrate_lower!=sh_audio->ov->vi.bitrate_nominal)||(sh_audio->ov->vi.bitrate_upper!=sh_audio->ov->vi.bitrate_nominal)?'V':'C');
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Encoded by: %s\n",sh_audio->ov->vc.vendor);
}
sh_audio->channels=sh_audio->ov->vi.channels;
sh_audio->samplerate=sh_audio->ov->vi.rate;
sh_audio->i_bps=sh_audio->ov->vi.bitrate_nominal/8;
// printf("[\n");
// sh_audio->a_buffer_len=sh_audio->audio_out_minsize;///ov->vi.channels;
// printf("]\n");
/* OK, got and parsed all three headers. Initialize the Vorbis
packet->PCM decoder. */
vorbis_synthesis_init(&sh_audio->ov->vd,&sh_audio->ov->vi); /* central decode state */
vorbis_block_init(&sh_audio->ov->vd,&sh_audio->ov->vb); /* local state for most of the decode
so multiple block decodes can
proceed in parallel. We could init
multiple vorbis_block structures
for vd here */
//printf("OggVorbis: synthesis and block init done.\n");
ogg_sync_init(&sh_audio->ov->oy); /* Now we can read pages */
while((ret = ogg_sync_pageout(&sh_audio->ov->oy,&sh_audio->ov->og))!=1) {
if(ret == -1)
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"OggVorbis: Pageout: not properly synced, had to skip some bytes.\n");
else
if(ret == 0) {
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Pageout: need more data to verify page, reading more data.\n");
/* submit a a_buffer_len block to libvorbis' Ogg layer */
buffer=ogg_sync_buffer(&sh_audio->ov->oy,256);
ogg_sync_wrote(&sh_audio->ov->oy,demux_read_data(sh_audio->ds,buffer,256));
}
}
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Pageout: successfull.\n");
ogg_stream_pagein(&sh_audio->ov->os,&sh_audio->ov->og); /* we can ignore any errors here
as they'll also become apparent
at packetout */
/* Get the serial number and set up the rest of decode. */
/* serialno first; use it to set up a logical stream */
ogg_stream_init(&sh_audio->ov->os,ogg_page_serialno(&sh_audio->ov->og));
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Init OK!\n");
break;
}
#endif
#ifdef USE_LIBMAD
case AFM_MAD:
{
printf(__FILE__ ":%d:mad: initialising\n", __LINE__);
mad_frame_init(&mad_frame);
mad_stream_init(&mad_stream);
printf(__FILE__ ":%d:mad: preparing buffer\n", __LINE__);
mad_prepare_buffer(sh_audio, &mad_stream, sh_audio->a_in_buffer_size);
mad_stream_buffer(&mad_stream, (unsigned char*)(sh_audio->a_in_buffer), sh_audio->a_in_buffer_len);
mad_stream_sync(&mad_stream);
mad_synth_init(&mad_synth);
if(mad_frame_decode(&mad_frame, &mad_stream) == 0)
{
printf(__FILE__ ":%d:mad: post processing buffer\n", __LINE__);
mad_postprocess_buffer(sh_audio, &mad_stream);
}
else
{
printf(__FILE__ ":%d:mad: frame decoding failed\n", __LINE__);
}
sh_audio->channels=2; // hack
sh_audio->samplerate=mad_frame.header.sfreq;
sh_audio->i_bps=mad_frame.header.bitrate;
printf(__FILE__ ":%d:mad: continuing\n", __LINE__);
break;
}
#endif
}
if(!sh_audio->channels || !sh_audio->samplerate){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,MSGTR_UnknownAudio);
driver=0;
}
if(!driver){
if(sh_audio->a_buffer) free(sh_audio->a_buffer);
sh_audio->a_buffer=NULL;
return 0;
}
if(!sh_audio->o_bps)
sh_audio->o_bps=sh_audio->channels*sh_audio->samplerate*sh_audio->samplesize;
return driver;
}
// Audio decoding:
// Decode a single frame (mp3,acm etc) or 'minlen' bytes (pcm/alaw etc)
// buffer length is 'maxlen' bytes, it shouldn't be exceeded...
int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen){
int len=-1;
switch(sh_audio->codec->driver){
#ifdef USE_LIBAVCODEC
case AFM_FFMPEG: {
unsigned char *start=NULL;
int y;
while(len<minlen){
int len2=0;
int x=ds_get_packet(sh_audio->ds,&start);
if(x<=0) break; // error
y=avcodec_decode_audio(&lavc_context,(INT16*)buf,&len2,start,x);
if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
if(y<x) sh_audio->ds->buffer_pos+=y-x; // put back data (HACK!)
if(len2>0){
//len=len2;break;
if(len<0) len=len2; else len+=len2;
buf+=len2;
}
mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d \n",y,len2);
}
}
break;
#endif
case AFM_MPEG: // MPEG layer 2 or 3
len=MP3_DecodeFrame(buf,-1);
// len=MP3_DecodeFrame(buf,3);
break;
#ifdef HAVE_OGGVORBIS
case AFM_VORBIS: { // OggVorbis
/* note: good minlen would be 4k or 8k IMHO - atmos */
int ret;
char *buffer;
int bytes;
int samples;
float **pcm;
//ogg_int16_t convbuffer[4096];
// int convsize;
int readlen=1024;
len=0;
// convsize=minlen/sh_audio->ov->vi.channels;
while(len < minlen) { /* double loop allows for break in inner loop */
while(len < minlen) { /* without aborting the outer loop - atmos */
ret=ogg_stream_packetout(&sh_audio->ov->os,&sh_audio->ov->op);
if(ret==0) {
int xxx=0;
//printf("OggVorbis: Packetout: need more data, paging!\n");
while((ret = ogg_sync_pageout(&sh_audio->ov->oy,&sh_audio->ov->og))!=1) {
if(ret == -1)
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Pageout: not properly synced, had to skip some bytes.\n");
else
if(ret == 0) {
//printf("OggVorbis: Pageout: need more data to verify page, reading more data.\n");
/* submit a readlen k block to libvorbis' Ogg layer */
buffer=ogg_sync_buffer(&sh_audio->ov->oy,readlen);
bytes=demux_read_data(sh_audio->ds,buffer,readlen);
xxx+=bytes;
ogg_sync_wrote(&sh_audio->ov->oy,bytes);
if(bytes==0)
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: 0Bytes written, possible End of Stream\n");
}
}
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\n[sync: %d ]\n",xxx);
//printf("OggVorbis: Pageout: successfull, pagin in.\n");
if(ogg_stream_pagein(&sh_audio->ov->os,&sh_audio->ov->og)<0)
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Pagein failed!\n");
break;
} else if(ret<0) {
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: Packetout: missing or corrupt data, skipping packet!\n");
break;
} else {
/* we have a packet. Decode it */
if(vorbis_synthesis(&sh_audio->ov->vb,&sh_audio->ov->op)==0) /* test for success! */
vorbis_synthesis_blockin(&sh_audio->ov->vd,&sh_audio->ov->vb);
/* **pcm is a multichannel float vector. In stereo, for
example, pcm[0] is left, and pcm[1] is right. samples is
the size of each channel. Convert the float values
(-1.<=range<=1.) to whatever PCM format and write it out */
while((samples=vorbis_synthesis_pcmout(&sh_audio->ov->vd,&pcm))>0){
int i,j;
int clipflag=0;
int convsize=(maxlen-len)/(2*sh_audio->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<sh_audio->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+=sh_audio->ov->vi.channels;
}
}
if(clipflag)
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"Clipping in frame %ld\n",(long)(sh_audio->ov->vd.sequence));
//fwrite(convbuffer,2*sh_audio->ov->vi.channels,bout,stderr); //dump pcm to file for debugging
//memcpy(buf+len,convbuffer,2*sh_audio->ov->vi.channels*bout);
len+=2*sh_audio->ov->vi.channels*bout;
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\n[decoded: %d / %d ]\n",bout,samples);
vorbis_synthesis_read(&sh_audio->ov->vd,bout); /* tell libvorbis how
many samples we
actually consumed */
}
} // from else, packetout ok
} // while len
} // outer while len
if(ogg_page_eos(&sh_audio->ov->og))
mp_msg(MSGT_DECAUDIO,MSGL_V,"OggVorbis: End of Stream reached!\n"); // FIXME clearup decoder, notify mplayer - atmos
mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"\n[len: %d ]\n",len);
break;
}
#endif
case AFM_PCM: // AVI PCM
len=demux_read_data(sh_audio->ds,buf,minlen);
break;
case AFM_DVDPCM: // DVD PCM
{ int j;
len=demux_read_data(sh_audio->ds,buf,minlen);
//if(i&1){ printf("Warning! pcm_audio_size&1 !=0 (%d)\n",i);i&=~1; }
// swap endian:
for(j=0;j<len;j+=2){
char x=buf[j];
buf[j]=buf[j+1];
buf[j+1]=x;
}
break;
}
case AFM_ALAW: // aLaw decoder
{ int l=demux_read_data(sh_audio->ds,buf,minlen/2);
unsigned short *d=(unsigned short *) buf;
unsigned char *s=buf;
len=2*l;
if(sh_audio->format==6){
// aLaw
while(l>0){ --l; d[l]=alaw2short[s[l]]; }
} else {
// uLaw
while(l>0){ --l; d[l]=ulaw2short[s[l]]; }
}
break;
}
case AFM_GSM: // MS-GSM decoder
{ unsigned char ibuf[65]; // 65 bytes / frame
if(demux_read_data(sh_audio->ds,ibuf,65)!=65) break; // EOF
XA_MSGSM_Decoder(ibuf,(unsigned short *) buf); // decodes 65 byte -> 320 short
// XA_GSM_Decoder(buf,(unsigned short *) &sh_audio->a_buffer[sh_audio->a_buffer_len]); // decodes 33 byte -> 160 short
len=2*320;
break;
}
case AFM_IMA4: // IMA-ADPCM 4:1 audio codec:
{ unsigned char ibuf[IMA4_BLOCK_SIZE]; // bytes / frame
if(demux_read_data(sh_audio->ds,ibuf,IMA4_BLOCK_SIZE)!=IMA4_BLOCK_SIZE) break; // EOF
len=2*ima4_decode_block(buf,ibuf,2*IMA4_SAMPLES_PER_BLOCK);
break;
}
case AFM_AC3: // AC3 decoder
//printf("{1:%d}",avi_header.idx_pos);fflush(stdout);
if(!sh_audio->ac3_frame) sh_audio->ac3_frame=ac3_decode_frame();
//printf("{2:%d}",avi_header.idx_pos);fflush(stdout);
if(sh_audio->ac3_frame){
len = 256 * 6 *sh_audio->channels*sh_audio->samplesize;
memcpy(buf,((ac3_frame_t*)sh_audio->ac3_frame)->audio_data,len);
sh_audio->ac3_frame=NULL;
}
//printf("{3:%d}",avi_header.idx_pos);fflush(stdout);
break;
case AFM_HWAC3: // AC3 through SPDIF
if(demux_read_data(sh_audio->ds,sh_audio->ac3_frame, 6144) != 6144)
break; //EOF
ac3_iec958_build_burst(1536, 0x1F, 1, buf, sh_audio->ac3_frame);
len = 6144;
break;
#ifdef USE_WIN32DLL
case AFM_ACM:
// len=sh_audio->audio_out_minsize; // optimal decoded fragment size
// if(len<minlen) len=minlen; else
// if(len>maxlen) len=maxlen;
// len=acm_decode_audio(sh_audio,buf,len);
len=acm_decode_audio(sh_audio,buf,minlen,maxlen);
break;
#endif
#ifdef USE_DIRECTSHOW
case AFM_DSHOW: // DirectShow
{ int size_in=0;
int size_out=0;
int srcsize=DS_AudioDecoder_GetSrcSize(maxlen);
mp_msg(MSGT_DECAUDIO,MSGL_DBG3,"DShow says: srcsize=%d (buffsize=%d) out_size=%d\n",srcsize,sh_audio->a_in_buffer_size,maxlen);
if(srcsize>sh_audio->a_in_buffer_size) srcsize=sh_audio->a_in_buffer_size; // !!!!!!
if(sh_audio->a_in_buffer_len<srcsize){
sh_audio->a_in_buffer_len+=
demux_read_data(sh_audio->ds,&sh_audio->a_in_buffer[sh_audio->a_in_buffer_len],
srcsize-sh_audio->a_in_buffer_len);
}
DS_AudioDecoder_Convert(sh_audio->a_in_buffer,sh_audio->a_in_buffer_len,
buf,maxlen, &size_in,&size_out);
mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"DShow: audio %d -> %d converted (in_buf_len=%d of %d) %d\n",size_in,size_out,sh_audio->a_in_buffer_len,sh_audio->a_in_buffer_size,ds_tell_pts(sh_audio->ds));
if(size_in>=sh_audio->a_in_buffer_len){
sh_audio->a_in_buffer_len=0;
} else {
sh_audio->a_in_buffer_len-=size_in;
memcpy(sh_audio->a_in_buffer,&sh_audio->a_in_buffer[size_in],sh_audio->a_in_buffer_len);
}
len=size_out;
break;
}
#endif
#ifdef USE_LIBMAD
case AFM_MAD:
{
mad_prepare_buffer(sh_audio, &mad_stream, sh_audio->a_in_buffer_size);
mad_stream_buffer(&mad_stream, sh_audio->a_in_buffer, sh_audio->a_in_buffer_len);
if(mad_frame_decode(&mad_frame, &mad_stream) == 0)
{
mad_synth_frame(&mad_synth, &mad_frame);
mad_postprocess_buffer(sh_audio, &mad_stream);
/* and fill buffer */
{
int i;
int end_size = mad_synth.pcm.length;
signed short* samples = (signed short*)buf;
if(end_size > maxlen/4)
end_size=maxlen/4;
for(i=0; i<mad_synth.pcm.length; ++i) {
*samples++ = mad_scale(mad_synth.pcm.samples[0][i]);
*samples++ = mad_scale(mad_synth.pcm.samples[0][i]);
// *buf++ = mad_scale(mad_synth.pcm.sampAles[1][i]);
}
len = end_size*4;
}
}
else
{
printf(__FILE__ ":%d:mad: frame decoding failed\n", __LINE__);
}
break;
}
#endif
}
return len;
}
void resync_audio_stream(sh_audio_t *sh_audio){
switch(sh_audio->codec->driver){
case AFM_MPEG:
MP3_DecodeFrame(NULL,-2); // resync
MP3_DecodeFrame(NULL,-2); // resync
MP3_DecodeFrame(NULL,-2); // resync
break;
#ifdef HAVE_OGGVORBIS
case AFM_VORBIS:
//printf("OggVorbis: resetting stream.\n");
ogg_sync_reset(&sh_audio->ov->oy);
ogg_stream_reset(&sh_audio->ov->os);
break;
#endif
case AFM_AC3:
ac3_bitstream_reset(); // reset AC3 bitstream buffer
// if(verbose){ printf("Resyncing AC3 audio...");fflush(stdout);}
sh_audio->ac3_frame=ac3_decode_frame(); // resync
// if(verbose) printf(" OK!\n");
break;
case AFM_ACM:
case AFM_DSHOW:
case AFM_HWAC3:
sh_audio->a_in_buffer_len=0; // reset ACM/DShow audio buffer
break;
#ifdef USE_LIBMAD
case AFM_MAD:
mad_prepare_buffer(sh_audio, &mad_stream, sh_audio->a_in_buffer_size);
mad_stream_buffer(&mad_stream, sh_audio->a_in_buffer, sh_audio->a_in_buffer_len);
mad_stream_sync(&mad_stream);
mad_postprocess_buffer(sh_audio, &mad_stream);
break;
#endif
}
}
void skip_audio_frame(sh_audio_t *sh_audio){
switch(sh_audio->codec->driver){
case AFM_MPEG: MP3_DecodeFrame(NULL,-2);break; // skip MPEG frame
case AFM_AC3: sh_audio->ac3_frame=ac3_decode_frame();break; // skip AC3 frame
case AFM_ACM:
case AFM_DSHOW: {
int skip=sh_audio->wf->nBlockAlign;
if(skip<16){
skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
if(skip<16) skip=16;
}
demux_read_data(sh_audio->ds,NULL,skip);
break;
}
case AFM_PCM:
case AFM_DVDPCM:
case AFM_ALAW: {
int skip=sh_audio->i_bps/16;
skip=skip&(~3);
demux_read_data(sh_audio->ds,NULL,skip);
break;
}
#ifdef USE_LIBMAD
case AFM_MAD:
{
mad_prepare_buffer(sh_audio, &mad_stream, sh_audio->a_in_buffer_size);
mad_stream_buffer(&mad_stream, sh_audio->a_in_buffer, sh_audio->a_in_buffer_len);
mad_stream_skip(&mad_stream, 2);
mad_stream_sync(&mad_stream);
mad_postprocess_buffer(sh_audio, &mad_stream);
break;
}
#endif
default: ds_fill_buffer(sh_audio->ds); // skip PCM frame
}
}
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