X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=snd_wav.c;h=6f861913335007bb2f155a68aa5b672c16cdaaee;hp=d643ae19e58861eae741402d62a6eaf497798e85;hb=f4fad9dbeda77dc25174c242f04c5abe88fafaf9;hpb=1dd2d0424fda2dd172b948a2985d0a14e0ddbbf7

diff --git a/snd_wav.c b/snd_wav.c
index d643ae19..6f861913 100644
--- a/snd_wav.c
+++ b/snd_wav.c
@@ -65,7 +65,7 @@ static int GetLittleLong(void)
 	return val;
 }
 
-static void FindNextChunk(char *name)
+static void FindNextChunk(const char *name)
 {
 	while (1)
 	{
@@ -84,6 +84,12 @@ static void FindNextChunk(char *name)
 			data_p = NULL;
 			return;
 		}
+		if (data_p + iff_chunk_len > iff_end)
+		{
+			// truncated chunk!
+			data_p = NULL;
+			return;
+		}
 		data_p -= 8;
 		last_chunk = data_p + 8 + ( (iff_chunk_len + 1) & ~1 );
 		if (!strncmp((const char *)data_p, name, 4))
@@ -91,7 +97,7 @@ static void FindNextChunk(char *name)
 	}
 }
 
-static void FindChunk(char *name)
+static void FindChunk(const char *name)
 {
 	last_chunk = iff_data;
 	FindNextChunk (name);
@@ -220,13 +226,24 @@ static wavinfo_t GetWavinfo (char *name, unsigned char *wav, int wavlength)
 
 /*
 ====================
-WAV_FetchSound
+WAV_GetSamplesFloat
 ====================
 */
-static const snd_buffer_t* WAV_FetchSound (void *sfxfetcher, void **chfetcherpointer, unsigned int *start, unsigned int nbsampleframes)
+static void WAV_GetSamplesFloat(channel_t *ch, sfx_t *sfx, int firstsampleframe, int numsampleframes, float *outsamplesfloat)
 {
-	*start = 0;
-	return (snd_buffer_t *)sfxfetcher;
+	int i, len = numsampleframes * sfx->format.channels;
+	if (sfx->format.width == 2)
+	{
+		const short *bufs = (const short *)sfx->fetcher_data + firstsampleframe * sfx->format.channels;
+		for (i = 0;i < len;i++)
+			outsamplesfloat[i] = bufs[i] * (1.0f / 32768.0f);
+	}
+	else
+	{
+		const signed char *bufb = (const signed char *)sfx->fetcher_data + firstsampleframe * sfx->format.channels;
+		for (i = 0;i < len;i++)
+			outsamplesfloat[i] = bufb[i] * (1.0f / 128.0f);
+	}
 }
 
 /*
@@ -234,25 +251,13 @@ static const snd_buffer_t* WAV_FetchSound (void *sfxfetcher, void **chfetcherpoi
 WAV_FreeSfx
 ====================
 */
-static void WAV_FreeSfx (void *sfxfetcherdata)
+static void WAV_FreeSfx(sfx_t *sfx)
 {
-	snd_buffer_t* sb = (snd_buffer_t *)sfxfetcherdata;
-	// Free the sound buffer
-	Mem_Free(sb);
+	// free the loaded sound data
+	Mem_Free(sfx->fetcher_data);
 }
 
-/*
-====================
-WAV_GetFormat
-====================
-*/
-static const snd_format_t* WAV_GetFormat (sfx_t* sfx)
-{
-	snd_buffer_t* sb = (snd_buffer_t *)sfx->fetcher_data;
-	return &sb->format;
-}
-
-const snd_fetcher_t wav_fetcher = { WAV_FetchSound, NULL, WAV_FreeSfx, WAV_GetFormat };
+const snd_fetcher_t wav_fetcher = { WAV_GetSamplesFloat, NULL, WAV_FreeSfx };
 
 
 /*
@@ -265,8 +270,9 @@ qboolean S_LoadWavFile (const char *filename, sfx_t *sfx)
 	fs_offset_t filesize;
 	unsigned char *data;
 	wavinfo_t info;
-	snd_format_t wav_format;
-	snd_buffer_t* sb;
+	int i, len;
+	const unsigned char *inb;
+	unsigned char *outb;
 
 	// Already loaded?
 	if (sfx->fetcher != NULL)
@@ -297,43 +303,46 @@ qboolean S_LoadWavFile (const char *filename, sfx_t *sfx)
 	//if (info.channels == 2)
 	//	Log_Printf("stereosounds.log", "%s\n", sfx->name);
 
-#if BYTE_ORDER != LITTLE_ENDIAN
-	// We must convert the WAV data from little endian
-	// to the machine endianess before resampling it
+	sfx->format.speed = info.rate;
+	sfx->format.width = info.width;
+	sfx->format.channels = info.channels;
+	sfx->fetcher = &wav_fetcher;
+	sfx->fetcher_data = Mem_Alloc(snd_mempool, info.samples * sfx->format.width * sfx->format.channels);
+	sfx->total_length = info.samples;
+	sfx->memsize += filesize;
+	len = info.samples * sfx->format.channels * sfx->format.width;
+	inb = data + info.dataofs;
+	outb = (unsigned char *)sfx->fetcher_data;
 	if (info.width == 2)
 	{
-		unsigned int len, i;
-		short* ptr;
-
-		len = info.samples * info.channels;
-		ptr = (short*)(data + info.dataofs);
-		for (i = 0; i < len; i++)
-			ptr[i] = LittleShort (ptr[i]);
+		if (mem_bigendian)
+		{
+			// we have to byteswap the data at load (better than doing it while mixing)
+			for (i = 0;i < len;i += 2)
+			{
+				outb[i] = inb[i+1];
+				outb[i+1] = inb[i];
+			}
+		}
+		else
+		{
+			// we can just copy it straight
+			memcpy(outb, inb, len);
+		}
 	}
-#endif
-
-	wav_format.speed = info.rate;
-	wav_format.width = info.width;
-	wav_format.channels = info.channels;
-	sb = Snd_CreateSndBuffer (data + info.dataofs, info.samples, &wav_format, snd_renderbuffer->format.speed);
-	if (sb == NULL)
+	else
 	{
-		Mem_Free(data);
-		return false;
+		// convert unsigned byte sound data to signed bytes for quicker mixing
+		for (i = 0;i < len;i++)
+			outb[i] = inb[i] - 0x80;
 	}
-	sfx->fetcher = &wav_fetcher;
-	sfx->fetcher_data = sb;
-
-	sfx->total_length = sb->nbframes;
-	sfx->memsize += sb->maxframes * sb->format.channels * sb->format.width + sizeof (*sb) - sizeof (sb->samples);
 
 	if (info.loopstart < 0)
 		sfx->loopstart = sfx->total_length;
 	else
-		sfx->loopstart = (double)info.loopstart * (double)sb->format.speed / (double)info.rate;
+		sfx->loopstart = info.loopstart;
 	sfx->loopstart = min(sfx->loopstart, sfx->total_length);
 	sfx->flags &= ~SFXFLAG_STREAMED;
 
-	Mem_Free (data);
 	return true;
 }