ao_dsound.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.

/******************************************************************************
 * ao_dsound.c: Windows DirectSound interface for MPlayer
 * Copyright (c) 2004 Gabor Szecsi <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *
 *****************************************************************************/
/**
\todo verify/extend multichannel support
*/


#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#define DIRECTSOUND_VERSION 0x0600
#include <dsound.h>

#include "config.h"
#include "libaf/af_format.h"
#include "audio_out.h"
#include "audio_out_internal.h"
#include "mp_msg.h"
#include "libvo/fastmemcpy.h"
#include "osdep/timer.h"
#include "subopt-helper.h"


static ao_info_t info =
{
	"Windows DirectSound audio output",
	"dsound",
	"Gabor Szecsi <[e-mail]>",
	""
};

LIBAO_EXTERN(dsound)

/**
\todo use the definitions from the win32 api headers when they define these
*/
#if 1
#define WAVE_FORMAT_IEEE_FLOAT 0x0003
#define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
#define WAVE_FORMAT_EXTENSIBLE 0xFFFE

static const GUID KSDATAFORMAT_SUBTYPE_PCM = {0x1,0x0000,0x0010, {0x80,0x00,0x00,0xaa,0x00,0x38,0x9b,0x71}};

#define SPEAKER_FRONT_LEFT             0x1
#define SPEAKER_FRONT_RIGHT            0x2
#define SPEAKER_FRONT_CENTER           0x4
#define SPEAKER_LOW_FREQUENCY          0x8
#define SPEAKER_BACK_LEFT              0x10
#define SPEAKER_BACK_RIGHT             0x20
#define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
#define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
#define SPEAKER_BACK_CENTER            0x100
#define SPEAKER_SIDE_LEFT              0x200
#define SPEAKER_SIDE_RIGHT             0x400
#define SPEAKER_TOP_CENTER             0x800
#define SPEAKER_TOP_FRONT_LEFT         0x1000
#define SPEAKER_TOP_FRONT_CENTER       0x2000
#define SPEAKER_TOP_FRONT_RIGHT        0x4000
#define SPEAKER_TOP_BACK_LEFT          0x8000
#define SPEAKER_TOP_BACK_CENTER        0x10000
#define SPEAKER_TOP_BACK_RIGHT         0x20000
#define SPEAKER_RESERVED               0x80000000

#define DSSPEAKER_HEADPHONE         0x00000001
#define DSSPEAKER_MONO              0x00000002
#define DSSPEAKER_QUAD              0x00000003
#define DSSPEAKER_STEREO            0x00000004
#define DSSPEAKER_SURROUND          0x00000005
#define DSSPEAKER_5POINT1           0x00000006

#ifndef _WAVEFORMATEXTENSIBLE_
typedef struct {
    WAVEFORMATEX    Format;
    union {
        WORD wValidBitsPerSample;       /* bits of precision  */
        WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
        WORD wReserved;                 /* If neither applies, set to zero. */
    } Samples;
    DWORD           dwChannelMask;      /* which channels are */
                                        /* present in stream  */
    GUID            SubFormat;
} WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
#endif

#endif

static const int channel_mask[] = {
  SPEAKER_FRONT_LEFT   | SPEAKER_FRONT_RIGHT  | SPEAKER_LOW_FREQUENCY,
  SPEAKER_FRONT_LEFT   | SPEAKER_FRONT_RIGHT  | SPEAKER_BACK_LEFT    | SPEAKER_BACK_RIGHT,
  SPEAKER_FRONT_LEFT   | SPEAKER_FRONT_RIGHT  | SPEAKER_BACK_LEFT    | SPEAKER_BACK_RIGHT   | SPEAKER_LOW_FREQUENCY,
  SPEAKER_FRONT_LEFT   | SPEAKER_FRONT_CENTER | SPEAKER_FRONT_RIGHT  | SPEAKER_BACK_LEFT    | SPEAKER_BACK_RIGHT     | SPEAKER_LOW_FREQUENCY
};

static HINSTANCE hdsound_dll = NULL;      ///handle to the dll
static LPDIRECTSOUND hds = NULL;          ///direct sound object 
static LPDIRECTSOUNDBUFFER hdspribuf = NULL; ///primary direct sound buffer
static LPDIRECTSOUNDBUFFER hdsbuf = NULL; ///secondary direct sound buffer (stream buffer)
static int buffer_size = 0;               ///size in bytes of the direct sound buffer   
static int write_offset = 0;              ///offset of the write cursor in the direct sound buffer
static int min_free_space = 0;            ///if the free space is below this value get_space() will return 0
                                          ///there will always be at least this amout of free space to prevent
                                          ///get_space() from returning wrong values when buffer is 100% full.
                                          ///will be replaced with nBlockAlign in init()
static int device_num = 0;                ///wanted device number
static GUID device;                       ///guid of the device 

/***************************************************************************************/

/**
\brief output error message
\param err error code
\return string with the error message
*/
static char * dserr2str(int err)
{
	switch (err) {
		case DS_OK: return "DS_OK";
		case DS_NO_VIRTUALIZATION: return "DS_NO_VIRTUALIZATION";
		case DSERR_ALLOCATED: return "DS_NO_VIRTUALIZATION";
		case DSERR_CONTROLUNAVAIL: return "DSERR_CONTROLUNAVAIL";
		case DSERR_INVALIDPARAM: return "DSERR_INVALIDPARAM";
		case DSERR_INVALIDCALL: return "DSERR_INVALIDCALL";
		case DSERR_GENERIC: return "DSERR_GENERIC";
		case DSERR_PRIOLEVELNEEDED: return "DSERR_PRIOLEVELNEEDED";
		case DSERR_OUTOFMEMORY: return "DSERR_OUTOFMEMORY";
		case DSERR_BADFORMAT: return "DSERR_BADFORMAT";
		case DSERR_UNSUPPORTED: return "DSERR_UNSUPPORTED";
		case DSERR_NODRIVER: return "DSERR_NODRIVER";
		case DSERR_ALREADYINITIALIZED: return "DSERR_ALREADYINITIALIZED";
		case DSERR_NOAGGREGATION: return "DSERR_NOAGGREGATION";
		case DSERR_BUFFERLOST: return "DSERR_BUFFERLOST";
		case DSERR_OTHERAPPHASPRIO: return "DSERR_OTHERAPPHASPRIO";
		case DSERR_UNINITIALIZED: return "DSERR_UNINITIALIZED";
		case DSERR_NOINTERFACE: return "DSERR_NOINTERFACE";
		case DSERR_ACCESSDENIED: return "DSERR_ACCESSDENIED";
		default: return "unknown";
	}
}

/**
\brief uninitialize direct sound
*/
static void UninitDirectSound(void)
{
    // finally release the DirectSound object
    if (hds) {
    	IDirectSound_Release(hds);
    	hds = NULL;
    }
    // free DSOUND.DLL
    if (hdsound_dll) {
    	FreeLibrary(hdsound_dll);
    	hdsound_dll = NULL;
    }
	mp_msg(MSGT_AO, MSGL_V, "ao_dsound: DirectSound uninitialized\n");
}

/**
\brief print the commandline help
*/
static void print_help()
{
  mp_msg(MSGT_AO, MSGL_FATAL,
           "\n-ao dsound commandline help:\n"
           "Example: mplayer -ao dsound:device=1\n"
           "  sets 1st device\n"
           "\nOptions:\n"
           "  device=<device-number>\n"
           "    Sets device number, use -v to get a list\n");
}


/**
\brief enumerate direct sound devices
\return TRUE to continue with the enumeration
*/
static BOOL CALLBACK DirectSoundEnum(LPGUID guid,LPCSTR desc,LPCSTR module,LPVOID context)
{
    int* device_index=context;
    mp_msg(MSGT_AO, MSGL_V,"%i %s ",*device_index,desc);
    if(device_num==*device_index){
        mp_msg(MSGT_AO, MSGL_V,"<--");
        if(guid){
            memcpy(&device,guid,sizeof(GUID));
        }
    }
    mp_msg(MSGT_AO, MSGL_V,"\n");
    (*device_index)++;
    return TRUE;
}


/**
\brief initilize direct sound
\return 0 if error, 1 if ok
*/
static int InitDirectSound(void)
{
	DSCAPS dscaps;

	// initialize directsound
    HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
	HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKA, LPVOID);   
	int device_index=0;
	opt_t subopts[] = {
	  {"device", OPT_ARG_INT, &device_num,NULL},
	  {NULL}
	}; 
	if (subopt_parse(ao_subdevice, subopts) != 0) {
		print_help();
		return 0;
	}
    
	hdsound_dll = LoadLibrary("DSOUND.DLL");
	if (hdsound_dll == NULL) {
		mp_msg(MSGT_AO, MSGL_ERR, "ao_dsound: cannot load DSOUND.DLL\n");
		return 0;
	}
	OurDirectSoundCreate = (void*)GetProcAddress(hdsound_dll, "DirectSoundCreate");
	OurDirectSoundEnumerate = (void*)GetProcAddress(hdsound_dll, "DirectSoundEnumerateA");

	if (OurDirectSoundCreate == NULL || OurDirectSoundEnumerate == NULL) {
		mp_msg(MSGT_AO, MSGL_ERR, "ao_dsound: GetProcAddress FAILED\n");
		FreeLibrary(hdsound_dll);
		return 0;
	}
    
	// Enumerate all directsound devices
	mp_msg(MSGT_AO, MSGL_V,"ao_dsound: Output Devices:\n");
	OurDirectSoundEnumerate(DirectSoundEnum,&device_index);

	// Create the direct sound object
	if FAILED(OurDirectSoundCreate((device_num)?&device:NULL, &hds, NULL )) {
		mp_msg(MSGT_AO, MSGL_ERR, "ao_dsound: cannot create a DirectSound device\n");
		FreeLibrary(hdsound_dll);
		return 0;
	}

	/* Set DirectSound Cooperative level, ie what control we want over Windows
	 * sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
	 * settings of the primary buffer, but also that only the sound of our
	 * application will be hearable when it will have the focus.
	 * !!! (this is not really working as intended yet because to set the
	 * cooperative level you need the window handle of your application, and
	 * I don't know of any easy way to get it. Especially since we might play
	 * sound without any video, and so what window handle should we use ???
	 * The hack for now is to use the Desktop window handle - it seems to be
	 * working */
	if (IDirectSound_SetCooperativeLevel(hds, GetDesktopWindow(), DSSCL_EXCLUSIVE)) {
		mp_msg(MSGT_AO, MSGL_ERR, "ao_dsound: cannot set direct sound cooperative level\n");
		IDirectSound_Release(hds);
		FreeLibrary(hdsound_dll);
		return 0;
	}
	mp_msg(MSGT_AO, MSGL_V, "ao_dsound: DirectSound initialized\n");

	memset(&dscaps, 0, sizeof(DSCAPS));
	dscaps.dwSize = sizeof(DSCAPS);
	if (DS_OK == IDirectSound_GetCaps(hds, &dscaps)) {
		if (dscaps.dwFlags & DSCAPS_EMULDRIVER) mp_msg(MSGT_AO, MSGL_V, "ao_dsound: DirectSound is emulated, waveOut may give better performance\n");
	} else {
		mp_msg(MSGT_AO, MSGL_V, "ao_dsound: cannot get device capabilities\n");
	}

	return 1;
}

/**
\brief destroy the direct sound buffer
*/
static void DestroyBuffer(void)
{
	if (hdsbuf) {
		IDirectSoundBuffer_Release(hdsbuf);
		hdsbuf = NULL;
	}
	if (hdspribuf) {
		IDirectSoundBuffer_Release(hdspribuf);
		hdspribuf = NULL;
	}
}

/**
\brief fill sound buffer
\param data pointer to the sound data to copy
\param len length of the data to copy in bytes
\return number of copyed bytes
*/
static int write_buffer(unsigned char *data, int len)
{
  HRESULT res;
  LPVOID lpvPtr1; 
  DWORD dwBytes1; 
  LPVOID lpvPtr2; 
  DWORD dwBytes2;