{"id":4122,"date":"2018-05-29T20:44:16","date_gmt":"2018-05-29T12:44:16","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=4122"},"modified":"2018-06-10T00:30:39","modified_gmt":"2018-06-09T16:30:39","slug":"directsound","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/directsound\/","title":{"rendered":"DirectSound\u4e4b\u64ad\u653e\u8072\u97f3"},"content":{"rendered":"
\"\"<\/a>
DirectSound\u4e4b\u64ad\u653e\u8072\u97f3<\/figcaption><\/figure>\n

DirectSound\u9867\u660e\u601d\u7fa9\u53ef\u4ee5\u8b93\u4f60\u63a7\u5236\u8072\u5361\u64ad\u653e\u8072\u97f3\u548c\u97f3\u6a02. DirectSound\u7531\u8a31\u591a\u6a21\u584a\u548c\u63a5\u53e3\u7d44\u6210,\u7de8\u8b6f\u6642\u9700\u8981\u5eab\u6587\u6a94DSOUND.LIB\u548c\u982d\u6587\u6a94DSOUND.H<\/p>\n

WAV\u97f3\u6a94\u64ad\u653e\u6f14\u793a\u7a0b\u5f0f,\u6309+\/-\u9375\u63a7\u5236\u8072\u97f3\u97f3\u91cf.\u6309Open\u8f09\u5165WAV\u97f3\u6a94<\/a>:\u4e0b\u8f09<\/a><\/p>\n

1.\u555f\u52d5DirectSound<\/p>\n

IDirectSound\u63a5\u53e3:DirectSound\u7684\u4e3bCOM\u5c0d\u8c61.\u5b83\u4ee3\u8868\u8072\u5361\u786c\u4ef6.\u82e5\u4f60\u88dd\u6709\u591a\u500b\u8072\u5361,\u5247\u6bcf\u500bDirectSound\u5c0d\u8c61\u4ee3\u8868\u4e00\u500b\u8072\u5361.\u5275\u5efa\u4e3b\u8072\u5361\u5c0d\u8c61,\u8f38\u5165NULL\u8207\u9ed8\u8a8d\u8072\u5361\u93c8\u63a5<\/p>\n

LPDIRECTSOUND\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 direct_sound;<\/p>\n

DirectSoundCreate(NULL,&direct_sound,NULL);<\/p>\n

if (direct_sound == NULL)<\/p>\n

return false;<\/p>\n

2.\u8a2d\u7f6e\u9ed8\u8a8d\u5354\u4f5c\u7b49\u7d1a<\/p>\n

\u8a2d\u5b9a\u904a\u6232\u63a7\u5236\u8072\u5361\u7684\u7b49\u7d1a.\u4e00\u822c\u8a2d\u5b9a\u70baDSSCL_NORMAL\u5373\u53ef.\u7576\u7a0b\u5f0f\u5177\u6709\u7126\u9ede\u6642,\u5373\u53ef\u64ad\u653e\u8072\u97f3.\u4f46\u4e26\u4e0d\u59a8\u7919\u5176\u5b83\u7a0b\u5f0f. DirectSound\u81ea\u52d5\u5275\u5efa22kHz,\u7acb\u9ad4\u8072,8bit\u4e3b\u7de9\u5b58(\u9ed8\u8a8d).hWnd\u70ba\u7576\u524d\u7a97\u53e3\u53e5\u67c4<\/p>\n

direct_sound->SetCooperativeLevel(hWnd,DSSCL_NORMAL);<\/p>\n\n\n\n\n\n\n\n
\u53c3\u6578<\/td>\n\u7c21\u4ecb<\/td>\n<\/tr>\n
DSSCL_NORMAL<\/td>\n\u9ed8\u8a8d\u7b49\u7d1a<\/td>\n<\/tr>\n
DSSCL_PRIORITY<\/td>\n\u512a\u5148\u7b49\u7d1a.\u5141\u8a31\u8a2d\u5b9a\u4e3b\u7de9\u5b58\u6578\u64da\u683c\u5f0f<\/td>\n<\/tr>\n
DSSCL_EXCLUSIVE<\/td>\n\u7576\u7a97\u53e3\u5728\u524d\u81fa\u6642\u64c1\u6709\u512a\u5148\u7b49\u7d1a<\/td>\n<\/tr>\n
DSSCL_WRITEPRIMARY<\/td>\n\u5b8c\u5168\u63a7\u5236\u4e3b\u7de9\u5b58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

3.\u8f14\u52a9(\u4e8c\u7d1a)\u97f3\u983b\u7de9\u5b58<\/p>\n

\u300e\u8f14\u52a9\u7de9\u5b58\u300f\u5373\u4ee3\u8868\u4f60\u60f3\u64ad\u653e\u7684\u97f3\u983b.\u4f46\u8072\u5361\u4e0aSRAM\u537b\u5bb9\u91cf\u6709\u9650,\u800c\u4e14\u6211\u5370\u8c61\u4e2d\u53ea\u5728ISA\u7248CREATIVE(\u5275\u65b0)\u8072\u5361\u6709\u51fa\u73fe.\u300e\u8f14\u52a9\u7de9\u5b58\u300f\u5206\u70ba\u300e\u975c\u614b\u7de9\u5b58\u300f\u8207\u300e\u52d5\u614b\u7de9\u5b58\u300f.\u300e\u975c\u614b\u7de9\u5b58\u300f\u7528\u65bc\u5b58\u5132\u7d93\u5e38\u64ad\u653e\u77ed\u8072\u97f3.\u300e\u52d5\u614b\u7de9\u5b58\u300f\u7528\u65bc\u5b58\u5132\u8f03\u9577\u8072\u97f3.DirectSound\u4e0d\u65b7\u64ad\u653e\u4e0d\u65b7\u628a\u97f3\u983b\u6578\u64da\u5beb\u5165\u300e\u8f14\u52a9\u7de9\u5b58\u300f.\u4f7f\u7528\u7a31\u70baCircular Buffering(\u74b0\u5f62\u7de9\u5b58)\u7d50\u69cb,\u4e00\u500b\u6307\u91dd\u5beb\u5165\u97f3\u983b\u6578\u64da,\u53e6\u4e00\u500b\u6307\u91dd\u8b80\u53d6\u97f3\u983b\u6578\u64da.\u5275\u5efa\u8f14\u52a9\u8072\u97f3\u7de9\u885d\u5668<\/p>\n

HRESULT IDirectSound::CreateSoundBuffer(<\/p>\n

LPCDSBUFFERDESC lpcDSBufferDesc,<\/p>\n

LPLPDIRECTSOUNDBUFFER lplpDirectSoundBuffer,<\/p>\n

IUnknown FAR* pUnkOuter<\/p>\n

);<\/p>\n

4.\u8a2d\u7f6e\u7de9\u5b58\u683c\u5f0f\u63cf\u6558,\u55ae\u8072\u905311kHz,8bit<\/p>\n

AVEFORMATEX format;<\/p>\n

format.cbSize = 0;\/\/\u9ad8\u7d1a,\u7e3d\u662f0.<\/p>\n

format.wFormatTag = WAVE_FORMAT_PCM;\/\/PCM\u7de8\u78bc<\/p>\n

format.nChannels = 1;\/\/(\u8072\u9053\u6578\u76ee)1\u70ba\u55ae\u8072\u9053\u64ad\u653e<\/p>\n

format.nSamplesPerSec = 11025;\/\/ \u6a23\u672c\u901f\u5ea611kHz<\/p>\n

\/\/\u8a2d\u7f6e\u5b57\u7bc0\u5c0d\u9f4a.<\/p>\n

\/\/\u55ae\u8072\u9053\u4e58\u4ee51\u5b57\u7bc0(8Bit), \u5b83\u5c07\u662f1\u5b57\u7bc0\u5b57\u7bc0\u5c0d\u9f4a.<\/p>\n

\/\/\u7acb\u9ad4\u8072\u5b83\u5c07\u662f\u96d9\u8072\u90538Bit, \u5b83\u5c07\u662f2\u5b57\u7bc0\u5b57\u7bc0\u5c0d\u9f4a.<\/p>\n

\/\/\u5982\u679c\u5b83\u662f\u7acb\u9ad4\u8072\u7cfb\u7d71\u548c16Bit\u5b83\u5c07\u662f4\u5b57\u7bc0\u5c0d\u9f4a.<\/p>\n

format.nBlockAlign\u00a0\u00a0\u00a0\u00a0 = 1;<\/p>\n

format.wBitsPerSample = 8;\/\/\u8072\u8a00\u4f4d\u6578\u70ba8BIT<\/p>\n

format.nAvgBytesPerSec = format.nSamplesPerSec*format.nBlockAlign;\/\/ \u6bcf\u79d2\u5b57\u7bc0<\/p>\n

3.\u8a2d\u5b9a\u8072\u97f3\u7de9\u6c96\u5b58\u5132\u5668\u63cf\u6558\u8868<\/p>\n

DSBUFFERDESC buffer;\/\/ \u63cf\u8ff0\u7d50\u69cb<\/p>\n

memset(&buffer,0,sizeof(DSBUFFERDESC));\/\/ \u6e05\u96f6<\/p>\n

buffer.dwSize = sizeof(DSBUFFERDESC);\/\/ \u7d50\u69cb\u6240\u5360\u7a7a\u9593<\/p>\n

\/\/\u8a2d\u7f6eDirectSoundBuffer\u7684\u63cf\u8ff0\u7d50\u69cb\u7684\u6a19\u8a8c<\/p>\n

buffer.dwFlags = DSBCAPS_CTRLPAN | \/\/ \u7de9\u5b58\u64c1\u6709\u7e3d\u63a7\u5236\u529f\u80fd<\/p>\n

DSBCAPS_CTRLVOLUME | \/\/ \u7de9\u5b58\u64c1\u6709\u97f3\u91cf\u63a7\u5236\u529f\u80fd<\/p>\n

DSBCAPS_CTRLFREQUENCY; \/\/ \u7de9\u5b58\u64c1\u6709\u983b\u7387\u63a7\u5236\u529f\u80fd<\/p>\n

buffer.dwBufferBytes = sound_size;\/\/\u8072\u97f3\u6578\u64da\u5927\u5c0f.<\/p>\n

buffer.lpwfxFormat\u00a0 = &format;\/\/”WAV\u6587\u4ef6\u683c\u5f0f\u63cf\u8ff0\u7d50\u69cb”<\/p>\n

4.\u5275\u5efa\u8f14\u52a9(\u4e8c\u7d1a)\u97f3\u983b\u7de9\u5b58<\/p>\n

LPDIRECTSOUNDBUFFER sound_buffer;<\/p>\n

direct_sound->CreateSoundBuffer(&buffer, &sound_buffer, NULL);<\/p>\n

if (sound_buffer == NULL)<\/p>\n

return false;<\/p>\n

5.\u9396\u4f4f\u7de9\u5b58<\/p>\n

UCHAR *audio_ptr_1 = NULL, \/\/\u6307\u5411\u7de9\u5b58\u7b2c\u4e00\u90e8\u5206<\/p>\n

UCHAR *audio_ptr_2 = NULL; \/\/\u6307\u5411\u7de9\u5b58\u7b2c\u4e8c\u90e8\u5206<\/p>\n

DWORD\u00a0 audio_len_1 = 0,\u00a0 \/\/\u7b2c\u4e00\u7de9\u5b58\u9577\u5ea6<\/p>\n

DWORD\u00a0 audio_len_2 = 0;\u00a0 \/\/\u7b2c\u4e8c\u7de9\u5b58\u9577\u5ea6<\/p>\n

sound_buffer->Lock(0,\/\/\u5beb\u5165\u6307\u91dd\u6307\u5411\u4f4d\u7f6e<\/p>\n

sound_size,\/\/\u8981\u9396\u5b9a\u5927\u5c0f,\u97f3\u983b\u6578\u64da\u9577\u5ea6.<\/p>\n

(void **)&audio_ptr_1,\/\/\u7b2c\u4e00\u500b\u90e8\u5206\u958b\u59cb\u5730\u5740.<\/p>\n

&audio_len_1,\/\/\u7b2c\u4e00\u500b\u90e8\u5206\u9577\u5ea6<\/p>\n

(void **)&audio_ptr_2,\/\/\u7b2c\u4e8c\u500b\u90e8\u5206\u958b\u59cb\u5730\u5740.<\/p>\n

&audio_len_2,\/\/\u7b2c\u4e8c\u500b\u90e8\u5206\u9577\u5ea6<\/p>\n

DSBLOCK_FROMWRITECURSOR);\/\/ \u7de9\u5b58\u7576\u524d\u5beb\u5165\u9ede\u5c07\u88ab\u9396\u4f4f.<\/p>\n

6.\u62f7\u8c9d\u5230\u74b0\u5f62\u7de9\u5b58\u7b2c\u4e00\u90e8\u5206, sound_size\u70ba\u97f3\u983b\u6578\u64da<\/p>\n

memcpy(audio_ptr_1, sound_data, audio_len_1);<\/p>\n

7.\u62f7\u8c9d\u5230\u74b0\u5f62\u7de9\u5b58\u7b2c\u4e8c\u6bb5\u4e2d<\/p>\n

memcpy(audio_ptr_2, (sound_data + audio_len_1), audio_len_2);<\/p>\n

8.\u89e3\u9396<\/p>\n

sound_buffer->Unlock(audio_ptr_1,audio_len_1,audio_ptr_2,audio_len_2);<\/p>\n

9.\u5faa\u74b0\u64ad\u653e\u8072\u97f3<\/p>\n

sound_buffer->Play(0,0,DSBPLAY_LOOPING);<\/p>\n

10.\u82e5\u55ae\u6b21\u64ad\u653e\u8072\u97f3<\/p>\n

sound_buffer->Play(0, 0, 0);<\/p>\n

11.\u7576\u9000\u51fa\u904a\u6232\u6642\u9700\u8981\u91cb\u653e\u7de9\u5b58\u548c\u8072\u5361<\/p>\n

sound_buffer->Release();<\/p>\n

direct_sound->Release();<\/p>\n","protected":false},"excerpt":{"rendered":"

DirectSound\u9867\u660e\u601d\u7fa9\u53ef\u4ee5\u8b93\u4f60\u63a7\u5236\u8072\u5361\u64ad\u653e\u8072\u97f3\u548c\u97f3\u6a02. DirectSound\u7531\u8a31\u591a\u6a21\u584a\u548c\u63a5\u53e3\u7d44\u6210,\u7de8 … <\/p>\n

\u7e7c\u7e8c\u95b1\u8b80 DirectSound\u4e4b\u64ad\u653e\u8072\u97f3<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[51],"tags":[52],"class_list":["post-4122","post","type-post","status-publish","format-standard","hentry","category-windows","tag-directx","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=4122"}],"version-history":[{"count":2,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4122\/revisions"}],"predecessor-version":[{"id":4142,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4122\/revisions\/4142"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=4122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=4122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=4122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}