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Added int32 and float32 support (and some others!) to BeOS audio backend.

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Untested: No BeOS system here for compiling!

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402044
This commit is contained in:
Ryan C. Gordon 2006-08-31 22:15:07 +00:00
parent 5324cc6d9c
commit 558a5b6909
1 changed files with 66 additions and 25 deletions
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91
src/audio/baudio/SDL_beaudio.cc
View file

@ -156,37 +156,78 @@ extern "C"
int BE_OpenAudio(_THIS, SDL_AudioSpec * spec) int BE_OpenAudio(_THIS, SDL_AudioSpec * spec)
{ {
media_raw_audio_format format; media_raw_audio_format format;
SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
int valid_datatype = 0;
/* Parse the audio format and fill the Be raw audio format */
memset(&format, '\0', sizeof (media_raw_audio_format));
format.byte_order = B_MEDIA_LITTLE_ENDIAN;
format.frame_rate = (float) spec->freq;
format.channel_count = spec->channels; /* !!! FIXME: support > 2? */
while ((!valid_datatype) && (test_format)) {
spec->format = test_format;
switch (test_format) {
case AUDIO_S8:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_CHAR;
break;
case AUDIO_U8:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_UCHAR;
break;
case AUDIO_S16LSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_SHORT;
break;
case AUDIO_S16MSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_SHORT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
case AUDIO_S32LSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_INT;
break;
case AUDIO_S32MSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_INT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
case AUDIO_F32LSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_FLOAT;
break;
case AUDIO_F32MSB:
valid_datatype = 1;
format.format = media_raw_audio_format::B_AUDIO_FLOAT;
format.byte_order = B_MEDIA_BIG_ENDIAN;
break;
default:
test_format = SDL_NextAudioFormat();
break;
}
}
format.buffer_size = spec->samples;
if (!valid_datatype) { /* shouldn't happen, but just in case... */
SDL_SetError("Unsupported audio format");
return (-1);
}
/* Initialize the Be Application, if it's not already started */ /* Initialize the Be Application, if it's not already started */
if (SDL_InitBeApp() < 0) { if (SDL_InitBeApp() < 0) {
return (-1); return (-1);
} }
/* Parse the audio format and fill the Be raw audio format */
format.frame_rate = (float) spec->freq;
format.channel_count = spec->channels;
switch (spec->format & ~0x1000) {
case AUDIO_S8:
/* Signed 8-bit audio unsupported, convert to U8 */
spec->format = AUDIO_U8;
case AUDIO_U8:
format.format = media_raw_audio_format::B_AUDIO_UCHAR;
format.byte_order = 0;
break;
case AUDIO_U16:
/* Unsigned 16-bit audio unsupported, convert to S16 */
spec->format ^= 0x8000;
case AUDIO_S16:
format.format = media_raw_audio_format::B_AUDIO_SHORT;
if (spec->format & 0x1000) {
format.byte_order = 1; /* Big endian */
} else {
format.byte_order = 2; /* Little endian */
}
break;
}
format.buffer_size = spec->samples;
/* Calculate the final parameters for this audio specification */ /* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(spec); SDL_CalculateAudioSpec(spec);