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