Mercurial > sdl-ios-xcode
annotate src/audio/SDL_wave.h @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 13 Apr 2009 00:53:12 +0000 |
| parents | a1b03ba2fcd0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
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5 This library is SDL_free software; you can redistribute it and/or |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
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20 slouken@libsdl.org |
| 0 | 21 */ |
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1402
d910939febfa
Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents:
1336
diff
changeset
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* WAVE files are little-endian */ | |
| 25 | |
| 26 /*******************************************/ | |
| 27 /* Define values for Microsoft WAVE format */ | |
| 28 /*******************************************/ | |
| 29 #define RIFF 0x46464952 /* "RIFF" */ | |
| 30 #define WAVE 0x45564157 /* "WAVE" */ | |
| 31 #define FACT 0x74636166 /* "fact" */ | |
| 32 #define LIST 0x5453494c /* "LIST" */ | |
| 33 #define FMT 0x20746D66 /* "fmt " */ | |
| 34 #define DATA 0x61746164 /* "data" */ | |
| 35 #define PCM_CODE 0x0001 | |
| 36 #define MS_ADPCM_CODE 0x0002 | |
| 37 #define IMA_ADPCM_CODE 0x0011 | |
|
1818
7995cc87b777
Fixed some bugs in string handling
Sam Lantinga <slouken@libsdl.org>
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38 #define MP3_CODE 0x0055 |
| 0 | 39 #define WAVE_MONO 1 |
| 40 #define WAVE_STEREO 2 | |
| 41 | |
| 42 /* Normally, these three chunks come consecutively in a WAVE file */ | |
| 43 typedef struct WaveFMT { | |
| 44 /* Not saved in the chunk we read: | |
| 45 Uint32 FMTchunk; | |
| 46 Uint32 fmtlen; | |
| 47 */ | |
| 48 Uint16 encoding; | |
| 49 Uint16 channels; /* 1 = mono, 2 = stereo */ | |
| 50 Uint32 frequency; /* One of 11025, 22050, or 44100 Hz */ | |
| 51 Uint32 byterate; /* Average bytes per second */ | |
| 52 Uint16 blockalign; /* Bytes per sample block */ | |
| 53 Uint16 bitspersample; /* One of 8, 12, 16, or 4 for ADPCM */ | |
| 54 } WaveFMT; | |
| 55 | |
| 56 /* The general chunk found in the WAVE file */ | |
| 57 typedef struct Chunk { | |
| 58 Uint32 magic; | |
| 59 Uint32 length; | |
|
722
90dfd3f5782c
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
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60 Uint8 *data; |
| 0 | 61 } Chunk; |
| 62 |