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flac

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Nishi 2025-11-27 06:56:41 +09:00
commit d1f0477751
Signed by: nishi
GPG key ID: 27EF69B208EB9343
3 changed files with 79 additions and 0 deletions
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1
include/MDE/Sound/Sound.h
View file

@ -46,6 +46,7 @@ struct _MDESound {
extern MDESoundDriver MDESoundDriverMP3;
extern MDESoundDriver MDESoundDriverVorbis;
extern MDESoundDriver MDESoundDriverFLAC;
MDESound MDESoundOpen(const char* path);

77
sound/drv_flac.c Normal file
View file

@ -0,0 +1,77 @@
#include <MDE/Sound/Sound.h>
#include <MDE/Core/String.h>
#define DR_FLAC_IMPLEMENTATION
#include <dr_flac.h>
static void meta(void* user, drflac_metadata* metadata){
MDESoundContext ctx = user;
if(metadata->type == DRFLAC_METADATA_BLOCK_TYPE_VORBIS_COMMENT){
const char* comment;
drflac_vorbis_comment_iterator it;
drflac_uint32 len;
drflac_init_vorbis_comment_iterator(&it, metadata->data.vorbis_comment.commentCount, metadata->data.vorbis_comment.pComments);
while((comment = drflac_next_vorbis_comment(&it, &len)) != NULL){
char* s = malloc(len + 1);
char* p;
memcpy(s, comment, len);
s[len] = 0;
p = strchr(s, '=');
if(p != NULL) {
p[0] = 0;
if(strcasecmp(s, "TITLE") == 0) {
ctx->title = MDEStringDuplicate(p + 1);
} else if(strcasecmp(s, "ALBUM") == 0) {
ctx->album = MDEStringDuplicate(p + 1);
} else if(strcasecmp(s, "ARTIST") == 0) {
ctx->artist = MDEStringDuplicate(p + 1);
} else if(strcasecmp(s, "GENRE") == 0) {
ctx->genre = MDEStringDuplicate(p + 1);
} else if(strcasecmp(s, "TRACKNUMBER") == 0) {
ctx->track = atoi(p + 1);
}
}
free(s);
}
}
}
static MDESoundContext flac_open(const char* path) {
MDESoundContext ctx = malloc(sizeof(*ctx));
memset(ctx, 0, sizeof(*ctx));
ctx->opaque = drflac_open_file_with_metadata(path, meta, ctx, NULL);
if(ctx->opaque == NULL){
free(ctx);
return NULL;
}
ctx->sample_rate = ((drflac*)ctx->opaque)->sampleRate;
ctx->channels = ((drflac*)ctx->opaque)->channels;
ctx->frames = ((drflac*)ctx->opaque)->totalPCMFrameCount;
return ctx;
}
static void flac_close(MDESoundContext ctx) {
drflac_close(ctx->opaque);
free(ctx);
}
static int flac_read(MDESoundContext ctx, short* out, int frames) {
return drflac_read_pcm_frames_s16(ctx->opaque, frames, out);
}
static void flac_seek(MDESoundContext ctx, int frames) {
drflac_seek_to_pcm_frame(ctx->opaque, frames);
}
static MDESoundDriverRec rec = {
flac_open,
flac_close,
flac_read,
flac_seek};
MDESoundDriver MDESoundDriverFLAC = &rec;

1
sound/sound.c
View file

@ -15,6 +15,7 @@ MDESound MDESoundOpen(const char* path) {
TRY_DRIVER(MP3);
TRY_DRIVER(Vorbis);
TRY_DRIVER(FLAC);
if(sound->context == NULL) {
free(sound);