ad_realaud.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "config.h"

#ifdef USE_REALCODECS

//#include <stddef.h>
#ifdef HAVE_LIBDL
#include <dlfcn.h>
#endif
#include "help_mp.h"

#include "ad_internal.h"
#include "wine/windef.h"

static ad_info_t info =  {
	"RealAudio decoder",
	"realaud",
	"Alex Beregszaszi",
	"Florian Schneider, Arpad Gereoffy, Alex Beregszaszi, Donnie Smith",
	"binary real audio codecs"
};

LIBAD_EXTERN(realaud)

void *__builtin_new(unsigned long size) {
	return malloc(size);
}

// required for cook's uninit:
void __builtin_delete(void* ize) {
	free(ize);
}

#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
void *__ctype_b=NULL;
#endif

static unsigned long (*raCloseCodec)(void*);
static unsigned long (*raDecode)(void*, char*,unsigned long,char*,unsigned int*,long);
static unsigned long (*raFlush)(unsigned long,unsigned long,unsigned long);
static unsigned long (*raFreeDecoder)(void*);
static void*         (*raGetFlavorProperty)(void*,unsigned long,unsigned long,int*);
//static unsigned long (*raGetNumberOfFlavors2)(void);
static unsigned long (*raInitDecoder)(void*, void*);
static unsigned long (*raOpenCodec)(void*);
static unsigned long (*raOpenCodec2)(void*, void*);
static unsigned long (*raSetFlavor)(void*,unsigned long);
static void  (*raSetDLLAccessPath)(char*);
static void  (*raSetPwd)(char*,char*);
#ifdef USE_WIN32DLL
static unsigned long WINAPI (*wraCloseCodec)(void*);
static unsigned long WINAPI (*wraDecode)(void*, char*,unsigned long,char*,unsigned int*,long);
static unsigned long WINAPI (*wraFlush)(unsigned long,unsigned long,unsigned long);
static unsigned long WINAPI (*wraFreeDecoder)(void*);
static void*         WINAPI (*wraGetFlavorProperty)(void*,unsigned long,unsigned long,int*);
static unsigned long WINAPI (*wraInitDecoder)(void*, void*);
static unsigned long WINAPI (*wraOpenCodec)(void*);
static unsigned long WINAPI (*wraOpenCodec2)(void*, void*);
static unsigned long WINAPI (*wraSetFlavor)(void*,unsigned long);
static void          WINAPI (*wraSetDLLAccessPath)(char*);
static void          WINAPI (*wraSetPwd)(char*,char*);

static int dll_type = 0; /* 0 = unix dlopen, 1 = win32 dll */
#endif

static void *rv_handle = NULL;

#if 0
typedef struct {
    int samplerate;
    short bits;
    short channels;
    int unk1;
    int unk2;
    int packetsize;
    int unk3;
    void* unk4;
} ra_init_t ;
#else

/*
 Probably the linux .so-s were compiled with old GCC without setting
 packing, so it adds 2 bytes padding after the quality field.
 In windows it seems that there's no padding in it.
 
 -- alex
*/

/* linux dlls doesn't need packing */
typedef struct /*__attribute__((__packed__))*/ {
    int samplerate;
    short bits;
    short channels;
    short quality;
    /* 2bytes padding here, by gcc */
    int bits_per_frame;
    int packetsize;
    int extradata_len;
    void* extradata;
} ra_init_t;

/* windows dlls need packed structs (no padding) */
typedef struct __attribute__((__packed__)) {
    int samplerate;
    short bits;
    short channels;
    short quality;
    int bits_per_frame;
    int packetsize;
    int extradata_len;
    void* extradata;
} wra_init_t;
#endif

#ifdef HAVE_LIBDL
static int load_syms_linux(char *path)
{
    void *handle;

    mp_msg(MSGT_DECVIDEO, MSGL_INFO, "opening shared obj '%s'\n", path);
    handle = dlopen(path, RTLD_LAZY);
    if (!handle)
    {
	mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error: %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");
    raOpenCodec = dlsym(handle, "RAOpenCodec");
    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 && (raOpenCodec||raOpenCodec2) && raSetFlavor &&
	/*raSetDLLAccessPath &&*/ raInitDecoder)
    {
	rv_handle = handle;
	return 1;
    }
    
    mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Cannot resolve symbols - incompatible dll: %s\n",path);
    dlclose(handle);
    return 0;
}
#endif    

#ifdef USE_WIN32DLL

#ifdef WIN32_LOADER
#include "../loader/ldt_keeper.h"
#endif
void* WINAPI LoadLibraryA(char* name);
void* WINAPI GetProcAddress(void* handle,char *func);
int WINAPI FreeLibrary(void *handle);

static int load_syms_windows(char *path)
{
    void *handle;
    
    mp_msg(MSGT_DECVIDEO, MSGL_INFO, "opening win32 dll '%s'\n", path);
#ifdef WIN32_LOADER
    Setup_LDT_Keeper();
#endif
    handle = LoadLibraryA(path);
    if (!handle)
    {
	mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Error loading dll\n");
	return 0;
    }

    wraCloseCodec = GetProcAddress(handle, "RACloseCodec");
    wraDecode = GetProcAddress(handle, "RADecode");
    wraFlush = GetProcAddress(handle, "RAFlush");
    wraFreeDecoder = GetProcAddress(handle, "RAFreeDecoder");
    wraGetFlavorProperty = GetProcAddress(handle, "RAGetFlavorProperty");
    wraOpenCodec = GetProcAddress(handle, "RAOpenCodec");
    wraOpenCodec2 = GetProcAddress(handle, "RAOpenCodec2");
    wraInitDecoder = GetProcAddress(handle, "RAInitDecoder");
    wraSetFlavor = GetProcAddress(handle, "RASetFlavor");
    wraSetDLLAccessPath = GetProcAddress(handle, "SetDLLAccessPath");
    wraSetPwd = GetProcAddress(handle, "RASetPwd"); // optional, used by SIPR
    
    if (wraCloseCodec && wraDecode && /*wraFlush && */wraFreeDecoder &&
	wraGetFlavorProperty && (wraOpenCodec || wraOpenCodec2) && wraSetFlavor &&
	/*wraSetDLLAccessPath &&*/ wraInitDecoder)
    {
	rv_handle = handle;
	dll_type = 1;
	return 1;
    }
    
    mp_msg(MSGT_DECAUDIO,MSGL_WARN,"Cannot resolve symbols - incompatible dll: %s\n",path);
    FreeLibrary(handle);
    return 0;
    
}
#endif


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=0;
  void* prop;
  char *path;

  path = malloc(strlen(REALCODEC_PATH)+strlen(sh->codec->dll)+2);
  if (!path) return 0;
  sprintf(path, REALCODEC_PATH "/%s", sh->codec->dll);

    /* first try to load linux dlls, if failed and we're supporting win32 dlls,
       then try to load the windows ones */
      
#ifdef HAVE_LIBDL       
    if (strstr(sh->codec->dll,".dll") || !load_syms_linux(path))
#endif
#ifdef USE_WIN32DLL
	if (!load_syms_windows(sh->codec->dll))
#endif
    {
	mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_MissingDLLcodec, sh->codec->dll);
	mp_msg(MSGT_DECVIDEO, MSGL_HINT, "Read the RealAudio section of the DOCS!\n");
	free(path);
	return 0;
    }

#ifdef USE_WIN32DLL
  if((raSetDLLAccessPath && dll_type == 0) || (wraSetDLLAccessPath && dll_type == 1)){
#else
  if(raSetDLLAccessPath){
#endif
      int i;
      // used by 'SIPR'
      path = realloc(path, strlen(REALCODEC_PATH) + 12);
      sprintf(path, "DT_Codecs=" REALCODEC_PATH);
      if(path[strlen(path)-1]!='/'){
        path[strlen(path)+1]=0;
        path[strlen(path)]='/';
      }
      path[strlen(path)+1]=0;
#ifdef USE_WIN32DLL
    if (dll_type == 1)
    {
      for (i=0; i < strlen(path); i++)
        if (path[i] == '/') path[i] = '\\';
      wraSetDLLAccessPath(path);
    }
    else
#endif
      raSetDLLAccessPath(path);
  }