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Dynamic frame allocation for OGG vorbis

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This commit is contained in:
Jean Pierre Cimalando 2021-04-09 20:36:05 +02:00
parent 4ecfac1dce
commit 082c3fa58f
1 changed files with 36 additions and 4 deletions
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40
external/st_audiofile/src/st_audiofile.c vendored
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@ -24,6 +24,10 @@ struct st_audio_file {
struct { uint64_t frames; } mp3;
struct { uint32_t channels; float sample_rate; uint64_t frames; } ogg;
} cache;
union {
stb_vorbis_alloc ogg;
} alloc;
};
static st_audio_file* st_generic_open_file(const void* filename, int widepath)
@ -96,15 +100,42 @@ static st_audio_file* st_generic_open_file(const void* filename, int widepath)
// Try OGG
{
af->ogg =
int err = 0;
char* alloc_buffer = NULL;
int alloc_size = 0;
const int alloc_max_size = 16 * 1024 * 1024;
af->alloc.ogg.alloc_buffer = NULL;
af->alloc.ogg.alloc_buffer_length_in_bytes = 0;
int try_again;
do {
af->ogg =
#if defined(_WIN32)
widepath ? stb_vorbis_open_filename_w((const wchar_t*)filename, NULL, NULL) :
widepath ? stb_vorbis_open_filename_w((const wchar_t*)filename, NULL, NULL) :
#endif
stb_vorbis_open_filename((const char*)filename, NULL, NULL);
if (af->ogg) {
stb_vorbis_open_filename((const char*)filename, &err, &af->alloc.ogg);
try_again = 0;
if (!af->ogg && err == VORBIS_outofmem) {
int next_size = alloc_size ? (int)(alloc_size * 3L / 2) : (128 * 1024);
if (next_size <= alloc_max_size) {
free(alloc_buffer);
alloc_size = next_size;
alloc_buffer = (char*)malloc(alloc_size);
af->alloc.ogg.alloc_buffer = alloc_buffer;
af->alloc.ogg.alloc_buffer_length_in_bytes = alloc_size;
try_again = alloc_buffer != NULL;
}
}
} while (try_again);
if (!af->ogg)
free(alloc_buffer);
else {
af->cache.ogg.frames = stb_vorbis_stream_length_in_samples(af->ogg);
if (af->cache.ogg.frames == 0) {
stb_vorbis_close(af->ogg);
free(alloc_buffer);
free(af);
return NULL;
}
@ -173,6 +204,7 @@ void st_close(st_audio_file* af)
break;
case st_audio_file_ogg:
stb_vorbis_close(af->ogg);
free(af->alloc.ogg.alloc_buffer);
break;
case st_audio_file_mp3:
drmp3_uninit(af->mp3);