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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#ifdef USE_REALCODECS
#include <stddef.h>
#include <dlfcn.h>
#include "ad_internal.h"
static ad_info_t info = {
"RealAudio decoder",
"real",
AFM_REAL,
"A'rpi",
"Florian Schneider",
"binary real audio codecs"
};
LIBAD_EXTERN(real)
static void *handle=NULL;
void *__builtin_new(unsigned long size) {
return malloc(size);
}
#if defined(__FreeBSD__) || defined(__NetBSD__)
void *__ctype_b=NULL;
#endif
static unsigned long (*raCloseCodec)(unsigned long);
static unsigned long (*raDecode)(unsigned long,unsigned long,unsigned long,unsigned long,unsigned long,unsigned long);
static unsigned long (*raFlush)(unsigned long,unsigned long,unsigned long);
static unsigned long (*raFreeDecoder)(unsigned long);
static unsigned long (*raGetFlavorProperty)(unsigned long,unsigned long,unsigned long,unsigned long);
//static unsigned long (*raGetNumberOfFlavors2)(void);
static unsigned long (*raInitDecoder)(unsigned long,unsigned long);
static unsigned long (*raOpenCodec2)(unsigned long);
static unsigned long (*raSetFlavor)(unsigned long,unsigned long);
//static void (*raSetDLLAccessPath)(unsigned long);
static void (*raSetPwd)(char*,char*);
typedef struct {
int samplerate;
short bits;
short channels;
int unk1;
int unk2;
int packetsize;
int unk3;
void* unk4;
} ra_init_t;
static int preinit(sh_audio_t *sh){
// let's check if the driver is available, return 0 if not.
// (you should do that if you use external lib(s) which is optional)
unsigned int result;
int len;
void* prop;
char path[4096];
sprintf(path, REALCODEC_PATH "/%s", sh->codec->dll);
handle = dlopen (path, RTLD_LAZY);
if(!handle){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Cannot open dll: %s\n",dlerror());
return 0;
}
raCloseCodec = dlsym(handle, "RACloseCodec");
raDecode = dlsym(handle, "RADecode");
raFlush = dlsym(handle, "RAFlush");
raFreeDecoder = dlsym(handle, "RAFreeDecoder");
raGetFlavorProperty = dlsym(handle, "RAGetFlavorProperty");
raOpenCodec2 = dlsym(handle, "RAOpenCodec2");
raInitDecoder = dlsym(handle, "RAInitDecoder");
raSetFlavor = dlsym(handle, "RASetFlavor");
// raSetDLLAccessPath = dlsym(handle, "SetDLLAccessPath");
raSetPwd = dlsym(handle, "RASetPwd"); // optional, used by SIPR
if(!raCloseCodec || !raDecode || !raFlush || !raFreeDecoder ||
!raGetFlavorProperty || !raOpenCodec2 || !raSetFlavor ||
/*!raSetDLLAccessPath ||*/ !raInitDecoder){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Cannot resolve symbols - incompatible dll\n");
return 0;
}
result=raOpenCodec2(&sh->context);
if(result){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Decoder open failed, error code: 0x%X\n",result);
return 0;
}
sh->samplerate=sh->wf->nSamplesPerSec;
sh->samplesize=sh->wf->wBitsPerSample/8;
sh->channels=sh->wf->nChannels;
{ unsigned char temp2[16]={1,0,0,3,4,0,0,0x14,0,0,0,0,0,1,0,3};
// note: temp2[] come from audio stream extra header (last 16 of the total 24 bytes)
ra_init_t init_data={
sh->wf->nSamplesPerSec,sh->wf->wBitsPerSample,sh->wf->nChannels,
100, // ???
((short*)(sh->wf+1))[0], // subpacket size
sh->wf->nBlockAlign,
16, // ??
((char*)(sh->wf+1))+6+8
};
result=raInitDecoder(sh->context,&init_data);
if(result){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Decoder init failed, error code: 0x%X\n",result);
return 0;
}
}
if(raSetPwd){
// used by 'SIPR'
raSetPwd(sh->context,"Ardubancel Quazanga"); // set password... lol.
}
result=raSetFlavor(sh->context,((short*)(sh->wf+1))[2]);
if(result){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Decoder flavor setup failed, error code: 0x%X\n",result);
return 0;
}
prop=raGetFlavorProperty(sh->context,((short*)(sh->wf+1))[2],0,&len);
mp_msg(MSGT_DECAUDIO,MSGL_INFO,"Audio codec: [%d] %s\n",((short*)(sh->wf+1))[2],prop);
prop=raGetFlavorProperty(sh->context,((short*)(sh->wf+1))[2],1,&len);
sh->i_bps=((*((int*)prop))+4)/8;
mp_msg(MSGT_DECAUDIO,MSGL_INFO,"Audio bitrate: %5.3f kbit/s (%d bps) \n",(*((int*)prop))*0.001f,sh->i_bps);
// prop=raGetFlavorProperty(sh->context,((short*)(sh->wf+1))[2],0x13,&len);
// mp_msg(MSGT_DECAUDIO,MSGL_INFO,"Samples/block?: %d \n",(*((int*)prop)));
sh->audio_out_minsize=128000; // no idea how to get... :(
sh->audio_in_minsize=((short*)(sh->wf+1))[1]*sh->wf->nBlockAlign;
return 1; // return values: 1=OK 0=ERROR
}
static int init(sh_audio_t *sh_audio){
// initialize the decoder, set tables etc...
// you can store HANDLE or private struct pointer at sh->context
// you can access WAVEFORMATEX header at sh->wf
// set sample format/rate parameters if you didn't do it in preinit() yet.
return 1; // return values: 1=OK 0=ERROR
}
static void uninit(sh_audio_t *sh){
// uninit the decoder etc...
// again: you don't have to free() a_in_buffer here! it's done by the core.
}
static unsigned char sipr_swaps[38][2]={
{0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
{13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
{25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
{42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
{77,80} };
static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen){
int result;
int len=-1;
int sps=((short*)(sh->wf+1))[0];
int w=sh->wf->nBlockAlign; // 5
int h=((short*)(sh->wf+1))[1];
// printf("bs=%d sps=%d w=%d h=%d \n",sh->wf->nBlockAlign,sps,w,h);
#if 1
if(sh->a_in_buffer_len<=0){
// fill the buffer!
if(!sps){
// 'sipr' way
int j,n;
int bs=h*w*2/96; // nibbles per subpacket
unsigned char *p=sh->a_in_buffer;
demux_read_data(sh->ds, p, h*w);
for(n=0;n<38;n++){
int i=bs*sipr_swaps[n][0];
int o=bs*sipr_swaps[n][1];
// swap nibbles of block 'i' with 'o' TODO: optimize
for(j=0;j<bs;j++){
int x=(i&1) ? (p[(i>>1)]>>4) : (p[(i>>1)]&15);
int y=(o&1) ? (p[(o>>1)]>>4) : (p[(o>>1)]&15);
if(o&1) p[(o>>1)]=(p[(o>>1)]&0x0F)|(x<<4);
else p[(o>>1)]=(p[(o>>1)]&0xF0)|x;
if(i&1) p[(i>>1)]=(p[(i>>1)]&0x0F)|(y<<4);
else p[(i>>1)]=(p[(i>>1)]&0xF0)|y;
++i;++o;
}
}
sh->a_in_buffer_size=
sh->a_in_buffer_len=w*h;
} else {
// 'cook' way
int x,y;
w/=sps;
for(y=0;y<h;y++)
for(x=0;x<w;x++){
demux_read_data(sh->ds, sh->a_in_buffer+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
}
sh->a_in_buffer_size=
sh->a_in_buffer_len=w*h*sps;
}
}
#else
if(sh->a_in_buffer_len<=0){
// fill the buffer!
demux_read_data(sh->ds, sh->a_in_buffer, sh->wf->nBlockAlign);
sh->a_in_buffer_size=
sh->a_in_buffer_len=sh->wf->nBlockAlign;
}
#endif
result=raDecode(sh->context, sh->a_in_buffer+sh->a_in_buffer_size-sh->a_in_buffer_len, sh->wf->nBlockAlign,
buf, &len, -1);
sh->a_in_buffer_len-=sh->wf->nBlockAlign;
// printf("radecode: %d bytes, res=0x%X \n",len,result);
return len; // return value: number of _bytes_ written to output buffer,
// or -1 for EOF (or uncorrectable error)
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...){
// various optional functions you MAY implement:
switch(cmd){
case ADCTRL_RESYNC_STREAM:
// it is called once after seeking, to resync.
// Note: sh_audio->a_in_buffer_len=0; is done _before_ this call!
return CONTROL_TRUE;
case ADCTRL_SKIP_FRAME:
// it is called to skip (jump over) small amount (1/10 sec or 1 frame)
// of audio data - used to sync audio to video after seeking
// if you don't return CONTROL_TRUE, it will defaults to:
// ds_fill_buffer(sh_audio->ds); // skip 1 demux packet
return CONTROL_TRUE;
}
return CONTROL_UNKNOWN;
}
#endif
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