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More audio migration clarification

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This commit is contained in:
Sam Lantinga
2023-11-03 00:28:05 -07:00
parent 14980b25a8
commit ea02630143
1 changed files with 4 additions and 4 deletions
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8
docs/README-migration.md
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@@ -81,14 +81,14 @@ In SDL2, you might have done something like this to play audio...
...in SDL3, you can do this... ...in SDL3, you can do this...
```c ```c
void SDLCALL MyAudioCallback3(void *userdata, SDL_AudioStream *stream, int additional_amount, int total_amount) void SDLCALL MyNewAudioCallback(void *userdata, SDL_AudioStream *stream, int additional_amount, int total_amount)
{ {
/* Calculate a little more audio here, maybe using `userdata`, write it to `stream` /* Calculate a little more audio here, maybe using `userdata`, write it to `stream`
* *
* If you want to reuse the original callback, you could do something like this: * If you want to use the original callback, you could do something like this:
*/ */
if (additional_amount > 0) { if (additional_amount > 0) {
Uint16 *data = SDL_stack_alloc(Uint16, additional_amount / sizeof(Uint16)); Uint8 *data = SDL_stack_alloc(Uint8, additional_amount);
if (data) { if (data) {
MyAudioCallback(userdata, data, additional_amount); MyAudioCallback(userdata, data, additional_amount);
SDL_PutAudioStreamData(stream, data, additional_amount); SDL_PutAudioStreamData(stream, data, additional_amount);
@@ -99,7 +99,7 @@ In SDL2, you might have done something like this to play audio...
/* ...somewhere near startup... */ /* ...somewhere near startup... */
const SDL_AudioSpec spec = { SDL_AUDIO_S16, 2, 44100 }; const SDL_AudioSpec spec = { SDL_AUDIO_S16, 2, 44100 };
SDL_AudioStream *stream = SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_OUTPUT, &spec, MyAudioCallback3, &my_audio_callback_user_data); SDL_AudioStream *stream = SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_OUTPUT, &spec, MyNewAudioCallback, &my_audio_callback_user_data);
SDL_ResumeAudioDevice(SDL_GetAudioStreamDevice(stream)); SDL_ResumeAudioDevice(SDL_GetAudioStreamDevice(stream));
``` ```