Mercurial > SDL_sound_CoreAudio
changeset 143:3e60862fbd76
Start of audio converter work.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Mon, 15 Oct 2001 21:21:11 +0000 |
parents | 56f6acdc4ea0 |
children | 195c96fa355a |
files | Makefile.am SDL_sound.c SDL_sound_internal.h |
diffstat | 3 files changed, 36 insertions(+), 15 deletions(-) [+] |
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--- a/Makefile.am Mon Oct 15 21:20:54 2001 +0000 +++ b/Makefile.am Mon Oct 15 21:21:11 2001 +0000 @@ -10,7 +10,8 @@ SDL_sound.c \ SDL_sound_internal.h \ extra_rwops.c \ - extra_rwops.h + extra_rwops.h \ + audio_convert.c libSDL_sound_la_LDFLAGS = \ -release $(LT_RELEASE) \ @@ -19,4 +20,7 @@ EXTRA_DIST = \ - CREDITS + CREDITS \ + LICENSE \ + CHANGELOG +
--- a/SDL_sound.c Mon Oct 15 21:20:54 2001 +0000 +++ b/SDL_sound.c Mon Oct 15 21:21:11 2001 +0000 @@ -381,13 +381,13 @@ memcpy(&desired, (_desired != NULL) ? _desired : &sample->actual, sizeof (Sound_AudioInfo)); - if (SDL_BuildAudioCVT(&internal->sdlcvt, - sample->actual.format, - sample->actual.channels, - (int) sample->actual.rate, /* !!! FIXME: Int? Really? */ - desired.format, - desired.channels, - (int) desired.rate) == -1) /* !!! FIXME: Int? Really? */ + if (Sound_BuildAudioCVT(&internal->sdlcvt, + sample->actual.format, + sample->actual.channels, + sample->actual.rate, + desired.format, + desired.channels, + desired.rate) == -1) { Sound_SetError(SDL_GetError()); funcs->close(sample); @@ -398,7 +398,7 @@ if (internal->sdlcvt.len_mult > 1) { void *rc = realloc(sample->buffer, - sample->buffer_size * internal->sdlcvt.len_mult); + sample->buffer_size * internal->sdlcvt.len_mult); if (rc == NULL) { funcs->close(sample); @@ -611,8 +611,8 @@ if (internal->sdlcvt.needed) { internal->sdlcvt.len = retval; - SDL_ConvertAudio(&internal->sdlcvt); - retval *= internal->sdlcvt.len_mult; + Sound_ConvertAudio(&internal->sdlcvt); + retval = internal->sdlcvt.len_cvt; } /* if */ return(retval);
--- a/SDL_sound_internal.h Mon Oct 15 21:20:54 2001 +0000 +++ b/SDL_sound_internal.h Mon Oct 15 21:21:11 2001 +0000 @@ -94,7 +94,7 @@ * Sound_Sample *prev; (offlimits) * SDL_RWops *rw; (can use, but do NOT close it) * const Sound_DecoderFunctions *funcs; (that's this structure) - * SDL_AudioCVT sdlcvt; (offlimits) + * Sound_AudioCVT sdlcvt; (offlimits) * void *buffer; (offlimits until read() method) * Uint32 buffer_size; (offlimits until read() method) * void *decoder_private; (read and write access) @@ -158,20 +158,37 @@ } Sound_DecoderFunctions; +/* A structure to hold a set of audio conversion filters and buffers */ + +typedef struct Sound_AudioCVT +{ + int needed; /* Set to 1 if conversion possible */ + Uint16 src_format; /* Source audio format */ + Uint16 dst_format; /* Target audio format */ + double rate_incr; /* Rate conversion increment */ + Uint8 *buf; /* Buffer to hold entire audio data */ + int len; /* Length of original audio buffer */ + int len_cvt; /* Length of converted audio buffer */ + int len_mult; /* buffer must be len*len_mult big */ + double len_ratio; /* Given len, final size is len*len_ratio */ + void (*filters[20])(struct Sound_AudioCVT *cvt, Uint16 *format); + int filter_index; /* Current audio conversion function */ +} Sound_AudioCVT; + + typedef struct __SOUND_SAMPLEINTERNAL__ { Sound_Sample *next; Sound_Sample *prev; SDL_RWops *rw; const Sound_DecoderFunctions *funcs; - SDL_AudioCVT sdlcvt; + Sound_AudioCVT sdlcvt; void *buffer; Uint32 buffer_size; void *decoder_private; } Sound_SampleInternal; - /* error messages... */ #define ERR_IS_INITIALIZED "Already initialized" #define ERR_NOT_INITIALIZED "Not initialized"