X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=snd_wav.c;h=6f861913335007bb2f155a68aa5b672c16cdaaee;hp=a972ef41ff295375d3b94a7f6be5599f8d2f5dbf;hb=ab2e285e252663c0b7ab9128eb5ef753419f276e;hpb=aa33d8f8642530f7f266d6cde1422f95aa74b2be

diff --git a/snd_wav.c b/snd_wav.c
index a972ef41..6f861913 100644
--- a/snd_wav.c
+++ b/snd_wav.c
@@ -27,7 +27,7 @@
 #include "snd_wav.h"
 
 
-typedef struct
+typedef struct wavinfo_s
 {
 	int		rate;
 	int		width;
@@ -38,10 +38,10 @@ typedef struct
 } wavinfo_t;
 
 
-static qbyte *data_p;
-static qbyte *iff_end;
-static qbyte *last_chunk;
-static qbyte *iff_data;
+static unsigned char *data_p;
+static unsigned char *iff_end;
+static unsigned char *last_chunk;
+static unsigned char *iff_data;
 static int iff_chunk_len;
 
 
@@ -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);
@@ -122,7 +128,7 @@ static void DumpChunks(void)
 GetWavinfo
 ============
 */
-static wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
+static wavinfo_t GetWavinfo (char *name, unsigned char *wav, int wavlength)
 {
 	wavinfo_t info;
 	int i;
@@ -205,7 +211,7 @@ static wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
 	{
 		if (samples < info.samples)
 		{
-			Con_Printf ("Sound %s has a bad loop length", name);
+			Con_Printf ("Sound %s has a bad loop length\n", name);
 			info.samples = samples;
 		}
 	}
@@ -220,12 +226,24 @@ static wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
 
 /*
 ====================
-WAV_FetchSound
+WAV_GetSamplesFloat
 ====================
 */
-static const sfxbuffer_t* WAV_FetchSound (channel_t* ch, unsigned int start, unsigned int nbsamples)
+static void WAV_GetSamplesFloat(channel_t *ch, sfx_t *sfx, int firstsampleframe, int numsampleframes, float *outsamplesfloat)
 {
-	return (sfxbuffer_t *)ch->sfx->fetcher_data;
+	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);
+	}
 }
 
 /*
@@ -233,19 +251,13 @@ static const sfxbuffer_t* WAV_FetchSound (channel_t* ch, unsigned int start, uns
 WAV_FreeSfx
 ====================
 */
-static void WAV_FreeSfx (sfx_t* sfx)
+static void WAV_FreeSfx(sfx_t *sfx)
 {
-	sfxbuffer_t* sb = (sfxbuffer_t *)sfx->fetcher_data;
-
-	// Free the sound buffer
-	sfx->memsize -= (sb->length * sfx->format.channels * sfx->format.width) + sizeof (*sb) - sizeof (sb->data);
-	Mem_Free(sb);
-
-	sfx->fetcher_data = NULL;
-	sfx->fetcher = NULL;
+	// free the loaded sound data
+	Mem_Free(sfx->fetcher_data);
 }
 
-const snd_fetcher_t wav_fetcher = { WAV_FetchSound, NULL, WAV_FreeSfx };
+const snd_fetcher_t wav_fetcher = { WAV_GetSamplesFloat, NULL, WAV_FreeSfx };
 
 
 /*
@@ -253,20 +265,21 @@ const snd_fetcher_t wav_fetcher = { WAV_FetchSound, NULL, WAV_FreeSfx };
 S_LoadWavFile
 ==============
 */
-qboolean S_LoadWavFile (const char *filename, sfx_t *s)
+qboolean S_LoadWavFile (const char *filename, sfx_t *sfx)
 {
-	qbyte *data;
+	fs_offset_t filesize;
+	unsigned char *data;
 	wavinfo_t info;
-	int len;
-	size_t memsize;
-	sfxbuffer_t* sb;
+	int i, len;
+	const unsigned char *inb;
+	unsigned char *outb;
 
 	// Already loaded?
-	if (s->fetcher != NULL)
+	if (sfx->fetcher != NULL)
 		return true;
 
 	// Load the file
-	data = FS_LoadFile(filename, snd_mempool, false);
+	data = FS_LoadFile(filename, snd_mempool, false, &filesize);
 	if (!data)
 		return false;
 
@@ -277,64 +290,59 @@ qboolean S_LoadWavFile (const char *filename, sfx_t *s)
 		return false;
 	}
 
-	Con_DPrintf ("Loading WAV file \"%s\"\n", filename);
+	if (developer_loading.integer >= 2)
+		Con_Printf ("Loading WAV file \"%s\"\n", filename);
 
-	info = GetWavinfo (s->name, data, (int)fs_filesize);
-	// Stereo sounds are allowed (intended for music)
-	if (info.channels < 1 || info.channels > 2)
+	info = GetWavinfo (sfx->name, data, (int)filesize);
+	if (info.channels < 1 || info.channels > 2)  // Stereo sounds are allowed (intended for music)
 	{
-		Con_Printf("%s has an unsupported number of channels (%i)\n",s->name, info.channels);
+		Con_Printf("%s has an unsupported number of channels (%i)\n",sfx->name, info.channels);
 		Mem_Free(data);
 		return false;
 	}
 	//if (info.channels == 2)
-	//	Log_Printf("stereosounds.log", "%s\n", s->name);
-
-	// calculate resampled length
-	len = (int) ((double) info.samples * (double) shm->format.speed / (double) info.rate);
-	len = len * info.width * info.channels;
-
-	memsize = len + sizeof (*sb) - sizeof (sb->data);
-	sb = (sfxbuffer_t *)Mem_Alloc (snd_mempool, memsize);
-	if (sb == NULL)
+	//	Log_Printf("stereosounds.log", "%s\n", sfx->name);
+
+	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)
 	{
-		Con_Printf("failed to allocate memory for sound \"%s\"\n", s->name);
-		Mem_Free(data);
-		return false;
+		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);
+		}
 	}
-	s->memsize += memsize;
-
-	s->fetcher = &wav_fetcher;
-	s->fetcher_data = sb;
-	s->format.speed = info.rate;
-	s->format.width = info.width;
-	s->format.channels = info.channels;
-	if (info.loopstart < 0)
-		s->loopstart = -1;
 	else
-		s->loopstart = (double)info.loopstart * (double)shm->format.speed / (double)s->format.speed;
-	s->flags &= ~SFXFLAG_STREAMED;
-
-#if BYTE_ORDER != LITTLE_ENDIAN
-	// We must convert the WAV data from little endian
-	// to the machine endianess before resampling it
-	if (info.width == 2)
 	{
-		int i;
-		short* ptr;
-
-		len = info.samples * info.channels;
-		ptr = (short*)(data + info.dataofs);
-		for (i = 0; i < len; i++)
-			ptr[i] = LittleShort (ptr[i]);
+		// convert unsigned byte sound data to signed bytes for quicker mixing
+		for (i = 0;i < len;i++)
+			outb[i] = inb[i] - 0x80;
 	}
-#endif
 
-	sb->length = (int)ResampleSfx (data + info.dataofs, info.samples, &s->format, sb->data, s->name);
-	s->format.speed = shm->format.speed;
-	s->total_length = sb->length;
-	sb->offset = 0;
+	if (info.loopstart < 0)
+		sfx->loopstart = sfx->total_length;
+	else
+		sfx->loopstart = info.loopstart;
+	sfx->loopstart = min(sfx->loopstart, sfx->total_length);
+	sfx->flags &= ~SFXFLAG_STREAMED;
 
-	Mem_Free (data);
 	return true;
 }