realaudio.c

uclinux 下的vlc播放器源代码

        /* Old format */
        asprintf( &psz_dll, "%s\\%4.4s3260.dll", ppsz_path[i],
                  (char *)&p_dec->fmt_in.i_codec );
        i_result = OpenWin32Dll( p_dec, ppsz_path[i], psz_dll );
        free( psz_dll );
        if( i_result == VLC_SUCCESS ) return VLC_SUCCESS;
    }

    return VLC_EGENERIC;
}

static int OpenNativeDll( decoder_t *p_dec, char *psz_path, char *psz_dll )
{
#if defined(HAVE_DL_DLOPEN)
    decoder_sys_t *p_sys = p_dec->p_sys;
    void *handle = 0, *context = 0;
    unsigned int i_result;
    void *p_prop;
    int i_prop;

    ra_init_t init_data =
    {
        p_dec->fmt_in.audio.i_rate,
        p_dec->fmt_in.audio.i_bitspersample,
        p_dec->fmt_in.audio.i_channels,
        100, /* quality */
        p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
        p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
        p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
    };

    msg_Dbg( p_dec, "opening library '%s'", psz_dll );
    if( !(handle = dlopen( psz_dll, RTLD_LAZY )) )
    {
        msg_Dbg( p_dec, "couldn't load library '%s' (%s)",
                 psz_dll, dlerror() );
        return VLC_EGENERIC;
    }

    p_sys->raCloseCodec = dlsym( handle, "RACloseCodec" );
    p_sys->raDecode = dlsym( handle, "RADecode" );
    p_sys->raFlush = dlsym( handle, "RAFlush" );
    p_sys->raFreeDecoder = dlsym( handle, "RAFreeDecoder" );
    p_sys->raGetFlavorProperty = dlsym( handle, "RAGetFlavorProperty" );
    p_sys->raOpenCodec = dlsym( handle, "RAOpenCodec" );
    p_sys->raOpenCodec2 = dlsym( handle, "RAOpenCodec2" );
    p_sys->raInitDecoder = dlsym( handle, "RAInitDecoder" );
    p_sys->raSetFlavor = dlsym( handle, "RASetFlavor" );
    p_sys->raSetDLLAccessPath = dlsym( handle, "SetDLLAccessPath" );
    p_sys->raSetPwd = dlsym( handle, "RASetPwd" ); // optional, used by SIPR

    if( !(p_sys->raOpenCodec || p_sys->raOpenCodec2) ||
        !p_sys->raCloseCodec || !p_sys->raInitDecoder ||
        !p_sys->raDecode || !p_sys->raFreeDecoder ||
        !p_sys->raGetFlavorProperty || !p_sys->raSetFlavor
        /* || !p_sys->raFlush || !p_sys->raSetDLLAccessPath */ )
    {
        goto error_native;
    }

    if( p_sys->raOpenCodec2 )
        i_result = p_sys->raOpenCodec2( &context, psz_path );
    else
        i_result = p_sys->raOpenCodec( &context );

    if( i_result )
    {
        msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
        goto error_native;
    }

    i_result = p_sys->raInitDecoder( context, &init_data );
    if( i_result )
    {
        msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
        goto error_native;
    }

    if( p_sys->i_codec_flavor >= 0 )
    {
        i_result = p_sys->raSetFlavor( context, p_sys->i_codec_flavor );
        if( i_result )
        {
            msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
                     i_result );
            goto error_native;
        }

        p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
                                             0, &i_prop );
        msg_Dbg( p_dec, "audio codec: [%d] %s",
                 p_sys->i_codec_flavor, (char *)p_prop );

        p_prop = p_sys->raGetFlavorProperty( context, p_sys->i_codec_flavor,
                                             1, &i_prop );
        if( p_prop )
        {
            int i_bps = ((*((int*)p_prop))+4)/8;
            msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
                     (*((int*)p_prop))*0.001f, i_bps );
        }
    }

    p_sys->context = context;
    p_sys->dll = handle;
    return VLC_SUCCESS;

 error_native:
    if( context ) p_sys->raFreeDecoder( context );
    if( context ) p_sys->raCloseCodec( context );
    dlclose( handle );
#endif

    return VLC_EGENERIC;
}

static int OpenWin32Dll( decoder_t *p_dec, char *psz_path, char *psz_dll )
{
#if defined(LOADER) || defined(WIN32)
    decoder_sys_t *p_sys = p_dec->p_sys;
    void *handle = 0, *context = 0;
    unsigned int i_result;
    void *p_prop;
    int i_prop;

    wra_init_t init_data =
    {
        p_dec->fmt_in.audio.i_rate,
        p_dec->fmt_in.audio.i_bitspersample,
        p_dec->fmt_in.audio.i_channels,
        100, /* quality */
        p_dec->fmt_in.audio.i_blockalign, /* subpacket size */
        p_dec->fmt_in.audio.i_blockalign, /* coded frame size */
        p_dec->fmt_in.i_extra, p_dec->fmt_in.p_extra
    };

    msg_Dbg( p_dec, "opening win32 dll '%s'", psz_dll );

#ifdef LOADER
    Setup_LDT_Keeper();
#endif

    if( !(handle = LoadLibraryA( psz_dll )) )
    {
        msg_Dbg( p_dec, "couldn't load dll '%s'", psz_dll );
        return VLC_EGENERIC;
    }

    p_sys->wraCloseCodec = GetProcAddress( handle, "RACloseCodec" );
    p_sys->wraDecode = GetProcAddress( handle, "RADecode" );
    p_sys->wraFlush = GetProcAddress( handle, "RAFlush" );
    p_sys->wraFreeDecoder = GetProcAddress( handle, "RAFreeDecoder" );
    p_sys->wraGetFlavorProperty =
        GetProcAddress( handle, "RAGetFlavorProperty" );
    p_sys->wraOpenCodec = GetProcAddress( handle, "RAOpenCodec" );
    p_sys->wraOpenCodec2 = GetProcAddress( handle, "RAOpenCodec2" );
    p_sys->wraInitDecoder = GetProcAddress( handle, "RAInitDecoder" );
    p_sys->wraSetFlavor = GetProcAddress( handle, "RASetFlavor" );
    p_sys->wraSetDLLAccessPath = GetProcAddress( handle, "SetDLLAccessPath" );
    p_sys->wraSetPwd =
        GetProcAddress( handle, "RASetPwd" ); // optional, used by SIPR

    if( !(p_sys->wraOpenCodec || p_sys->wraOpenCodec2) ||
        !p_sys->wraCloseCodec || !p_sys->wraInitDecoder ||
        !p_sys->wraDecode || !p_sys->wraFreeDecoder ||
        !p_sys->wraGetFlavorProperty || !p_sys->wraSetFlavor
        /* || !p_sys->wraFlush || !p_sys->wraSetDLLAccessPath */ )
    {
        FreeLibrary( handle );
        return VLC_EGENERIC;
    }

    if( p_sys->wraOpenCodec2 )
        i_result = p_sys->wraOpenCodec2( &context, psz_path );
    else
        i_result = p_sys->wraOpenCodec( &context );

    if( i_result )
    {
        msg_Err( p_dec, "decoder open failed, error code: 0x%x", i_result );
        goto error_win32;
    }

    i_result = p_sys->wraInitDecoder( context, &init_data );
    if( i_result )
    {
        msg_Err( p_dec, "decoder init failed, error code: 0x%x", i_result );
        goto error_win32;
    }

    if( p_sys->i_codec_flavor >= 0 )
    {
        i_result = p_sys->wraSetFlavor( context, p_sys->i_codec_flavor );
        if( i_result )
        {
            msg_Err( p_dec, "decoder flavor setup failed, error code: 0x%x",
                     i_result );
            goto error_win32;
        }

        p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
                                              0, &i_prop );
        msg_Dbg( p_dec, "audio codec: [%d] %s",
                 p_sys->i_codec_flavor, (char *)p_prop );

        p_prop = p_sys->wraGetFlavorProperty( context, p_sys->i_codec_flavor,
                                              1, &i_prop );
        if( p_prop )
        {
            int i_bps = ((*((int*)p_prop))+4)/8;
            msg_Dbg( p_dec, "audio bitrate: %5.3f kbit/s (%d bps)",
                     (*((int*)p_prop))*0.001f, i_bps );
        }
    }

    p_sys->context = context;
    p_sys->win32_dll = handle;
    return VLC_SUCCESS;

 error_win32:
    if( context ) p_sys->wraFreeDecoder( context );
    if( context ) p_sys->wraCloseCodec( context );
    FreeLibrary( handle );
#endif

    return VLC_EGENERIC;
}

/*****************************************************************************
 * CloseDll:
 *****************************************************************************/
static void CloseDll( decoder_t *p_dec )
{
    decoder_sys_t *p_sys = p_dec->p_sys;

    if( p_sys->context && p_sys->dll )
    {
        p_sys->raFreeDecoder( p_sys->context );
        p_sys->raCloseCodec( p_sys->context );
    }

    if( p_sys->context && p_sys->win32_dll )
    {
        p_sys->wraFreeDecoder( p_sys->context );
        p_sys->wraCloseCodec( p_sys->context );
    }

#if defined(HAVE_DL_DLOPEN)
    if( p_sys->dll ) dlclose( p_sys->dll );
#endif

#if defined(LOADER) || defined(WIN32)
    if( p_sys->win32_dll ) FreeLibrary( p_sys->win32_dll );

#if 0 //def LOADER /* Segfaults */
    Restore_LDT_Keeper( p_sys->ldt_fs );
    msg_Dbg( p_dec, "Restore_LDT_Keeper" );
#endif
#endif

    p_sys->dll = 0;
    p_sys->win32_dll = 0;
    p_sys->context = 0;
}

/*****************************************************************************
 * DecodeAudio:
 *****************************************************************************/
static aout_buffer_t *Decode( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    aout_buffer_t *p_aout_buffer = 0;
    unsigned int i_result;
    int i_samples;
    block_t *p_block;

#ifdef LOADER
    if( !p_sys->win32_dll && !p_sys->dll )
    {
        /* We must do open and close in the same thread (unless we do
         * Setup_LDT_Keeper in the main thread before all others */
        if( OpenDll( p_dec ) != VLC_SUCCESS )
        {
            /* Fatal */
            p_dec->b_error = VLC_TRUE;
            return NULL;
        }
    }
#endif

    if( pp_block == NULL || *pp_block == NULL ) return NULL;
    p_block = *pp_block;

    if( p_sys->dll )
        i_result = p_sys->raDecode( p_sys->context, (char *)p_block->p_buffer,
                                    (unsigned long)p_block->i_buffer,
                                    p_sys->p_out, &p_sys->i_out, -1 );
    else
        i_result = p_sys->wraDecode( p_sys->context, (char *)p_block->p_buffer,
                                     (unsigned long)p_block->i_buffer,
                                     p_sys->p_out, &p_sys->i_out, -1 );

#if 0
    msg_Err( p_dec, "decoded: %i samples (%i)",
             p_sys->i_out * 8 / p_dec->fmt_out.audio.i_bitspersample /
             p_dec->fmt_out.audio.i_channels, i_result );
#endif

    /* Date management */
    if( p_block->i_pts > 0 &&
        p_block->i_pts != aout_DateGet( &p_sys->end_date ) )
    {
        aout_DateSet( &p_sys->end_date, p_block->i_pts );
    }

    if( !aout_DateGet( &p_sys->end_date ) )
    {
        /* We've just started the stream, wait for the first PTS. */
        if( p_block ) block_Release( p_block );
        return NULL;
    }

    i_samples = p_sys->i_out * 8 /
        p_dec->fmt_out.audio.i_bitspersample /p_dec->fmt_out.audio.i_channels;

    p_aout_buffer =
        p_dec->pf_aout_buffer_new( p_dec, i_samples );
    if( p_aout_buffer )
    {
        memcpy( p_aout_buffer->p_buffer, p_sys->p_out, p_sys->i_out );

        /* Date management */
        p_aout_buffer->start_date = aout_DateGet( &p_sys->end_date );
        p_aout_buffer->end_date =
            aout_DateIncrement( &p_sys->end_date, i_samples );
    }

    block_Release( p_block );
    *pp_block = 0;
    return p_aout_buffer;
}