82c2927d1e
faster file buffering. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6591 a1c6a512-1295-4272-9138-f99709370657
161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Björn Stenberg
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "kernel.h"
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#include "plugin.h"
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#include <codecs/Tremor/ivorbisfile.h>
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#include "playback.h"
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#include "lib/codeclib.h"
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static struct plugin_api* rb;
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/* Some standard functions and variables needed by Tremor */
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int errno;
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size_t strlen(const char *s) {
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return(rb->strlen(s));
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}
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char *strcpy(char *dest, const char *src) {
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return(rb->strcpy(dest,src));
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}
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char *strcat(char *dest, const char *src) {
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return(rb->strcat(dest,src));
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}
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size_t read_handler(void *ptr, size_t size, size_t nmemb, void *datasource) {
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struct codec_api *p = (struct codec_api *) datasource;
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return p->read_filebuf(ptr, nmemb*size);
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}
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int seek_handler(void *datasource, ogg_int64_t offset, int whence) {
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/* We are not seekable at the moment */
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(void)datasource;
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(void)offset;
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(void)whence;
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return -1;
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}
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int close_handler(void *datasource) {
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(void)datasource;
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return 0;
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}
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long tell_handler(void *datasource) {
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struct codec_api *p = (struct codec_api *) datasource;
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return p->curpos;
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}
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#ifdef USE_IRAM
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extern char iramcopy[];
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extern char iramstart[];
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extern char iramend[];
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#endif
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/* reserve the PCM buffer in the IRAM area */
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static char pcmbuf[4096] IDATA_ATTR;
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/* this is the plugin entry point */
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enum plugin_status plugin_start(struct plugin_api* api, void* parm)
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{
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struct codec_api *ci = (struct codec_api *)parm;
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ov_callbacks callbacks;
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OggVorbis_File vf;
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vorbis_info* vi;
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int error;
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long n;
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int current_section;
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int eof;
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#if BYTE_ORDER == BIG_ENDIAN
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int i;
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char x;
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#endif
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TEST_PLUGIN_API(api);
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/* if you are using a global api pointer, don't forget to copy it!
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otherwise you will get lovely "I04: IllInstr" errors... :-) */
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rb = api;
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#ifdef USE_IRAM
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rb->memcpy(iramstart, iramcopy, iramend-iramstart);
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#endif
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/* This function sets up the buffers and reads the file into RAM */
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/* We need to flush reserver memory every track load. */
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next_track:
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if (codec_init(api, ci)) {
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return PLUGIN_ERROR;
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}
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/* Create a decoder instance */
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callbacks.read_func=read_handler;
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callbacks.seek_func=seek_handler;
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callbacks.tell_func=tell_handler;
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callbacks.close_func=close_handler;
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error=ov_open_callbacks(ci,&vf,NULL,0,callbacks);
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vi=ov_info(&vf,-1);
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if (vi==NULL) {
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// rb->splash(HZ*2, true, "Vorbis Error");
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return PLUGIN_ERROR;
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}
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eof=0;
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while (!eof) {
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/* Read host-endian signed 16 bit PCM samples */
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n=ov_read(&vf,pcmbuf,sizeof(pcmbuf),¤t_section);
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if (n==0) {
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eof=1;
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} else if (n < 0) {
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DEBUGF("Error decoding frame\n");
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} else {
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rb->yield();
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if (ci->stop_codec || ci->reload_codec)
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break ;
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while (!ci->audiobuffer_insert(pcmbuf, n))
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rb->yield();
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#if BYTE_ORDER == BIG_ENDIAN
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for (i=0;i<n;i+=2) {
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x=pcmbuf[i]; pcmbuf[i]=pcmbuf[i+1]; pcmbuf[i+1]=x;
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}
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#endif
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}
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}
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if (ci->request_next_track())
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goto next_track;
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return PLUGIN_OK;
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}
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