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Keep data length local instead of relying on file length when writing out .wav sounds

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This commit is contained in:
UnknownShadow200 2020-07-14 19:40:41 +10:00
parent d7299b12fd
commit b9ef7fbe70
1 changed files with 21 additions and 22 deletions
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39
src/Resources.c
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@ -607,20 +607,16 @@ static void TexPatcher_MakeDefaultZip(void) {
*--------------------------------------------------------Audio patcher----------------------------------------------------*
*#########################################################################################################################*/
#define WAV_FourCC(a, b, c, d) (((cc_uint32)a << 24) | ((cc_uint32)b << 16) | ((cc_uint32)c << 8) | (cc_uint32)d)
#define WAV_HDR_SIZE 44
/* Fixes up the .WAV header after having written all samples */
static void SoundPatcher_FixupHeader(struct Stream* s, struct VorbisState* ctx) {
cc_uint8 header[44];
cc_uint32 length;
cc_result res;
res = s->Length(s, &length);
if (res) { Logger_Warn(res, "getting .wav length"); return; }
res = s->Seek(s, 0);
static void SoundPatcher_FixupHeader(struct Stream* s, struct VorbisState* ctx, cc_uint32 len) {
cc_uint8 header[WAV_HDR_SIZE];
cc_result res = s->Seek(s, 0);
if (res) { Logger_Warn(res, "seeking to .wav start"); return; }
Stream_SetU32_BE(header + 0, WAV_FourCC('R','I','F','F'));
Stream_SetU32_LE(header + 4, length - 8);
Stream_SetU32_LE(header + 4, len - 8);
Stream_SetU32_BE(header + 8, WAV_FourCC('W','A','V','E'));
Stream_SetU32_BE(header + 12, WAV_FourCC('f','m','t',' '));
Stream_SetU32_LE(header + 16, 16); /* fmt chunk size */
@ -632,20 +628,21 @@ static void SoundPatcher_FixupHeader(struct Stream* s, struct VorbisState* ctx)
Stream_SetU16_LE(header + 32, ctx->channels * 2); /* block align */
Stream_SetU16_LE(header + 34, 16); /* bits per sample */
Stream_SetU32_BE(header + 36, WAV_FourCC('d','a','t','a'));
Stream_SetU32_LE(header + 40, length - sizeof(header));
Stream_SetU32_LE(header + 40, len - WAV_HDR_SIZE);
res = Stream_Write(s, header, sizeof(header));
res = Stream_Write(s, header, WAV_HDR_SIZE);
if (res) Logger_Warn(res, "fixing .wav header");
}
/* Writes an empty .WAV header and then writes all samples */
static void SoundPatcher_DecodeAudio(struct Stream* s, struct VorbisState* ctx) {
/* Decodes all samples, then produces a .WAV file from them */
static void SoundPatcher_WriteWav(struct Stream* s, struct VorbisState* ctx) {
cc_int16* samples;
int count;
cc_uint32 len = WAV_HDR_SIZE;
cc_result res;
int count;
/* ctx is all 0, so reuse it here for header */
res = Stream_Write(s, (const cc_uint8*)ctx, 44);
/* ctx is all 0, so reuse here for empty header */
res = Stream_Write(s, (const cc_uint8*)ctx, WAV_HDR_SIZE);
if (res) { Logger_Warn(res, "writing .wav header"); return; }
res = Vorbis_DecodeHeaders(ctx);
@ -654,10 +651,14 @@ static void SoundPatcher_DecodeAudio(struct Stream* s, struct VorbisState* ctx)
for (;;) {
res = Vorbis_DecodeFrame(ctx);
if (res == ERR_END_OF_STREAM) break;
if (res == ERR_END_OF_STREAM) {
/* reached end of samples, so done */
SoundPatcher_FixupHeader(s, ctx, len); break;
}
if (res) { Logger_Warn(res, "decoding .ogg"); break; }
count = Vorbis_OutputFrame(ctx, samples);
len += count * 2;
/* TODO: Do we need to account for big endian */
res = Stream_Write(s, samples, count * 2);
if (res) { Logger_Warn(res, "writing samples"); break; }
@ -681,9 +682,7 @@ static void SoundPatcher_Save(const char* name, struct HttpRequest* req) {
Ogg_Init(&ogg, &src);
ctx.source = &ogg;
SoundPatcher_DecodeAudio(&dst, &ctx);
SoundPatcher_FixupHeader(&dst, &ctx);
SoundPatcher_WriteWav(&dst, &ctx);
res = dst.Close(&dst);
if (res) Logger_Warn(res, "closing .wav file");