diff options
| author | norly <ny-git@enpas.org> | 2019-04-26 16:26:03 +0200 |
|---|---|---|
| committer | norly <ny-git@enpas.org> | 2019-04-26 16:33:30 +0200 |
| commit | 6ca1a0f9cd1e5400701ad1ec7d09206aa75ff2f9 (patch) | |
| tree | 624197580f28583cf6b289d6852bd4bb5796711a /apps/plugins/mikmod/playercode/mwav.c | |
| parent | 1b98f7c930017b5becdb28409eac170c843f23f2 (diff) | |
This is an early port of MikMod to Rockbox that I did back in 2007.
It was one of my early exercises in the C language.
Since I didn't upstream it back then, someone else ended up porting it
with a nicer UI.
Fun fact:
This version's PCM buffers are designed to be just about large enough
to allow an iPod Video to render fm-2year/rapido.xm without pausing.
Diffstat (limited to 'apps/plugins/mikmod/playercode/mwav.c')
| -rw-r--r-- | apps/plugins/mikmod/playercode/mwav.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/apps/plugins/mikmod/playercode/mwav.c b/apps/plugins/mikmod/playercode/mwav.c new file mode 100644 index 0000000..f054208 --- /dev/null +++ b/apps/plugins/mikmod/playercode/mwav.c @@ -0,0 +1,198 @@ +/* MikMod sound library
+ (c) 1998, 1999, 2000, 2001 Miodrag Vallat and others - see file AUTHORS
+ for complete list.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of
+ the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+*/
+
+/*==============================================================================
+
+ $Id: mwav.c,v 1.1.1.1 2004/01/21 01:36:35 raph Exp $
+
+ WAV sample loader
+
+==============================================================================*/
+
+/*
+ FIXME: Stereo .WAV files are not yet supported as samples.
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <string.h>
+
+#include "mikmod_internals.h"
+
+#ifdef SUNOS
+extern int fprintf(FILE *, const char *, ...);
+#endif
+
+typedef struct WAV {
+ CHAR rID[4];
+ ULONG rLen;
+ CHAR wID[4];
+ CHAR fID[4];
+ ULONG fLen;
+ UWORD wFormatTag;
+ UWORD nChannels;
+ ULONG nSamplesPerSec;
+ ULONG nAvgBytesPerSec;
+ UWORD nBlockAlign;
+ UWORD nFormatSpecific;
+} WAV;
+
+SAMPLE* Sample_LoadGeneric_internal(MREADER* reader)
+{
+ SAMPLE *si=NULL;
+ WAV wh;
+ BOOL have_fmt=0;
+
+ /* read wav header */
+ _mm_read_string(wh.rID,4,reader);
+ wh.rLen = _mm_read_I_ULONG(reader);
+ _mm_read_string(wh.wID,4,reader);
+
+ /* check for correct header */
+ if(_mm_eof(reader)|| memcmp(wh.rID,"RIFF",4) || memcmp(wh.wID,"WAVE",4)) {
+ _mm_errno = MMERR_UNKNOWN_WAVE_TYPE;
+ return NULL;
+ }
+
+ /* scan all RIFF blocks until we find the sample data */
+ for(;;) {
+ CHAR dID[4];
+ ULONG len,start;
+
+ _mm_read_string(dID,4,reader);
+ len = _mm_read_I_ULONG(reader);
+ /* truncated file ? */
+ if (_mm_eof(reader)) {
+ _mm_errno=MMERR_UNKNOWN_WAVE_TYPE;
+ return NULL;
+ }
+ start = _mm_ftell(reader);
+
+ /* sample format block
+ should be present only once and before a data block */
+ if(!memcmp(dID,"fmt ",4)) {
+ wh.wFormatTag = _mm_read_I_UWORD(reader);
+ wh.nChannels = _mm_read_I_UWORD(reader);
+ wh.nSamplesPerSec = _mm_read_I_ULONG(reader);
+ wh.nAvgBytesPerSec = _mm_read_I_ULONG(reader);
+ wh.nBlockAlign = _mm_read_I_UWORD(reader);
+ wh.nFormatSpecific = _mm_read_I_UWORD(reader);
+
+#ifdef MIKMOD_DEBUG
+ fprintf(stderr,"\rwavloader : wFormatTag=%04x blockalign=%04x nFormatSpc=%04x\n",
+ wh.wFormatTag,wh.nBlockAlign,wh.nFormatSpecific);
+#endif
+
+ if((have_fmt)||(wh.nChannels>1)) {
+ _mm_errno=MMERR_UNKNOWN_WAVE_TYPE;
+ return NULL;
+ }
+ have_fmt=1;
+ } else
+ /* sample data block
+ should be present only once and after a format block */
+ if(!memcmp(dID,"data",4)) {
+ if(!have_fmt) {
+ _mm_errno=MMERR_UNKNOWN_WAVE_TYPE;
+ return NULL;
+ }
+ if(!(si=(SAMPLE*)_mm_malloc(sizeof(SAMPLE)))) return NULL;
+ si->speed = wh.nSamplesPerSec/wh.nChannels;
+ si->volume = 64;
+ si->length = len;
+ if(wh.nBlockAlign == 2) {
+ si->flags = SF_16BITS | SF_SIGNED;
+ si->length >>= 1;
+ }
+ si->inflags = si->flags;
+ SL_RegisterSample(si,MD_SNDFX,reader);
+ SL_LoadSamples();
+
+ /* skip any other remaining blocks - so in case of repeated sample
+ fragments, we'll return the first anyway instead of an error */
+ break;
+ }
+ /* onto next block */
+ _mm_fseek(reader,start+len,SEEK_SET);
+ if (_mm_eof(reader))
+ break;
+ }
+
+ return si;
+}
+
+MIKMODAPI SAMPLE* Sample_LoadGeneric(MREADER* reader)
+{
+ SAMPLE* result;
+
+ MUTEX_LOCK(vars);
+ result=Sample_LoadGeneric_internal(reader);
+ MUTEX_UNLOCK(vars);
+
+ return result;
+}
+
+MIKMODAPI SAMPLE* Sample_LoadFP(int fp)
+{
+ SAMPLE* result=NULL;
+ MREADER* reader;
+
+ if((reader=_mm_new_file_reader(fp))) {
+ result=Sample_LoadGeneric(reader);
+ _mm_delete_file_reader(reader);
+ }
+ return result;
+}
+
+MIKMODAPI SAMPLE* Sample_Load(CHAR* filename)
+{
+ int fp;
+ SAMPLE *si=NULL;
+
+ if(!(md_mode & DMODE_SOFT_SNDFX)) return NULL;
+ if((fp=_mm_fopen(filename,O_RDONLY))) {
+ si = Sample_LoadFP(fp);
+ _mm_fclose(fp);
+ }
+ return si;
+}
+
+MIKMODAPI void Sample_Free(SAMPLE* si)
+{
+ if(si) {
+ MD_SampleUnload(si->handle);
+ free(si);
+ }
+}
+
+void Sample_Free_internal(SAMPLE *si)
+{
+ MUTEX_LOCK(vars);
+ Sample_Free(si);
+ MUTEX_UNLOCK(vars);
+}
+
+/* ex:set ts=4: */
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