diff options
| -rw-r--r-- | csrc/media_init.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/csrc/media_init.c b/csrc/media_init.c index 86e01b1..dc0eafe 100644 --- a/csrc/media_init.c +++ b/csrc/media_init.c @@ -22,6 +22,89 @@ WAVEFORMATEX wav_format; // 0x48cb3c int dw_48cae4, dw_47e750, dw_47e754; int *array_48cae8[16]; +struct riff_chunk +{ + char sig[4]; + uint32_t cksize; + char buffer[0]; /* buffer size = cksize, so that + the size of this chunk is cksize + 8 */ +}; + +/* the RIFF header */ +struct riff_header +{ + char sig[4]; /* "RIFF" */ + uint32_t filesz; /* filesz = whole RIFF file size - 8B (sig & filesz) */ + char filefmt[4]; /* e.g. AVI, WAVE */ + /* the following is the first chunk */ + struct riff_chunk chunk1; +}; + +LPDIRECTSOUNDBUFFER* fcn_00453dcf(void *a1) +{ + struct riff_header *wvbuf = (struct riff_header*)a1; + struct riff_chunk *aubuf; + + if (pdsound == NULL || a1 == NULL) + return NULL; + + char *sig = wvbuf->sig; + if (sig[0] != 'R' || sig[1] != 'I' || sig[2] != 'F' || sig[3] != 'F') + return NULL; + + memcpy(&wav_format, &wvbuf->chunk1.buffer, 16); + wav_format.cbSize = 0; + + uint32_t data_offset = wvbuf->chunk1.cksize + 20; /* offset of the second chunk */ + + while (1) { + aubuf = a1 + data_offset; + sig = aubuf->sig; + if (sig[0] == 'd' && sig[1] == 'a' && sig[2] == 't' && sig[3] == 'a') { + break; + } + data_offset += aubuf->cksize + 8; /* go to the next chunk */ + } + + uint32_t bufbytes = aubuf->cksize; + soundbuf_desc.dwSize = 20; + soundbuf_desc.dwFlags = 0xe2; + soundbuf_desc.dwBufferBytes = bufbytes; + soundbuf_desc.dwReserved = 0; + soundbuf_desc.lpwfxFormat = &wav_format; + + LPDIRECTSOUNDBUFFER *local_buf; /* esp */ + DWORD pvAudioPtr[2]; /* esp+4, esp+8 */ + DWORD dwAudioBytes[2]; /* esp+c, esp+0x10 */ + + if ((*pdsound)->CreateSoundBuffer(pdsound, &soundbuf_desc, &local_buf, NULL) != 0) + return 0; + + /* STDMETHOD(Lock)(THIS_ DWORD dwOffset, DWORD dwBytes, LPVOID *ppvAudioPtr1, LPDWORD pdwAudioBytes1, LPVOID *ppvAudioPtr2, LPDWORD pdwAudioBytes2, DWORD dwFlags) PURE; + */ + int res = (*local_buf)->Lock(local_buf, 0, bufbytes, + &pvAudioPtr[0], &dwAudioBytes[0], + &pvAudioPtr[1], &dwAudioBytes[1], 0); + if (res == 0x88780096) { + (*local_buf)->Restore(local_buf); + res = (*local_buf)->Lock(local_buf, 0, bufbytes, + &pvAudioPtr[0], &dwAudioBytes[0], + &pvAudioPtr[1], &dwAudioBytes[1], 0); + } + + if (res != 0) + return 0; + + memcpy(pvAudioPtr[0], aubuf->buffer, dwAudioBytes[0]); + if (bufbytes != dwAudioBytes[0]) { + memcpy(pvAudioPtr[1], aubuf->buffer + dwAudioBytes[0], dwAudioBytes[1]); + } + + /* STDMETHOD(Unlock)(THIS_ LPVOID pvAudioPtr1, DWORD dwAudioBytes1, LPVOID pvAudioPtr2, DWORD dwAudioPtr2) PURE; */ + (*local_buf)->Unlock(local_buf, &pvAudioPtr[0], dwAudioBytes[0], &pvAudioPtr[1], dwAudioBytes[1]); + return local_buf; +} + void fcn_004541e3() { if (pdsound == NULL) |