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-rw-r--r--apps/plugins/codecvorbis.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/apps/plugins/codecvorbis.c b/apps/plugins/codecvorbis.c
new file mode 100644
index 0000000000..2fcc031ce5
--- /dev/null
+++ b/apps/plugins/codecvorbis.c
@@ -0,0 +1,161 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "kernel.h"
+#include "plugin.h"
+
+#include <codecs/Tremor/ivorbisfile.h>
+
+#include "playback.h"
+#include "lib/codeclib.h"
+
+static struct plugin_api* rb;
+
+/* Some standard functions and variables needed by Tremor */
+
+
+int errno;
+
+size_t strlen(const char *s) {
+ return(rb->strlen(s));
+}
+
+char *strcpy(char *dest, const char *src) {
+ return(rb->strcpy(dest,src));
+}
+
+char *strcat(char *dest, const char *src) {
+ return(rb->strcat(dest,src));
+}
+
+size_t read_handler(void *ptr, size_t size, size_t nmemb, void *datasource) {
+ struct codec_api *p = (struct codec_api *) datasource;
+
+ return p->read_filebuf(ptr, nmemb*size);
+}
+
+int seek_handler(void *datasource, ogg_int64_t offset, int whence) {
+ /* We are not seekable at the moment */
+ (void)datasource;
+ (void)offset;
+ (void)whence;
+ return -1;
+}
+
+int close_handler(void *datasource) {
+ (void)datasource;
+ return 0;
+}
+
+long tell_handler(void *datasource) {
+ struct codec_api *p = (struct codec_api *) datasource;
+ return p->curpos;
+}
+
+#ifdef USE_IRAM
+extern char iramcopy[];
+extern char iramstart[];
+extern char iramend[];
+#endif
+
+
+/* reserve the PCM buffer in the IRAM area */
+static char pcmbuf[4096] IDATA_ATTR;
+
+/* this is the plugin entry point */
+enum plugin_status plugin_start(struct plugin_api* api, void* parm)
+{
+ struct codec_api *ci = (struct codec_api *)parm;
+ ov_callbacks callbacks;
+ OggVorbis_File vf;
+ vorbis_info* vi;
+
+ int error;
+ long n;
+ int current_section;
+ int eof;
+#if BYTE_ORDER == BIG_ENDIAN
+ int i;
+ char x;
+#endif
+
+ TEST_PLUGIN_API(api);
+
+ /* if you are using a global api pointer, don't forget to copy it!
+ otherwise you will get lovely "I04: IllInstr" errors... :-) */
+ rb = api;
+
+ #ifdef USE_IRAM
+ rb->memcpy(iramstart, iramcopy, iramend-iramstart);
+ #endif
+
+ /* This function sets up the buffers and reads the file into RAM */
+
+ /* We need to flush reserver memory every track load. */
+ next_track:
+ if (codec_init(api, ci)) {
+ return PLUGIN_ERROR;
+ }
+
+
+ /* Create a decoder instance */
+
+ callbacks.read_func=read_handler;
+ callbacks.seek_func=seek_handler;
+ callbacks.tell_func=tell_handler;
+ callbacks.close_func=close_handler;
+
+ error=ov_open_callbacks(ci,&vf,NULL,0,callbacks);
+
+ vi=ov_info(&vf,-1);
+
+ if (vi==NULL) {
+ // rb->splash(HZ*2, true, "Vorbis Error");
+ return PLUGIN_ERROR;
+ }
+
+ eof=0;
+ while (!eof) {
+ /* Read host-endian signed 16 bit PCM samples */
+ n=ov_read(&vf,pcmbuf,sizeof(pcmbuf),&current_section);
+
+ if (n==0) {
+ eof=1;
+ } else if (n < 0) {
+ DEBUGF("Error decoding frame\n");
+ } else {
+ rb->yield();
+ if (ci->stop_codec || ci->reload_codec)
+ break ;
+ while (!ci->audiobuffer_insert(pcmbuf, n))
+ rb->yield();
+
+#if BYTE_ORDER == BIG_ENDIAN
+ for (i=0;i<n;i+=2) {
+ x=pcmbuf[i]; pcmbuf[i]=pcmbuf[i+1]; pcmbuf[i+1]=x;
+ }
+#endif
+ }
+ }
+
+ if (ci->request_next_track())
+ goto next_track;
+
+ return PLUGIN_OK;
+}
+