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Diffstat (limited to 'apps/plugins/mpa2wav.c')
-rw-r--r--apps/plugins/mpa2wav.c269
1 files changed, 0 insertions, 269 deletions
diff --git a/apps/plugins/mpa2wav.c b/apps/plugins/mpa2wav.c
deleted file mode 100644
index bf40fa3b81..0000000000
--- a/apps/plugins/mpa2wav.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2005 Dave Chapman
- *
- * 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 "plugin.h"
-
-#if (CONFIG_HWCODEC == MASNONE)
-/* software codec platforms */
-
-#include <codecs/libmad/mad.h>
-
-#include "lib/xxx2wav.h" /* Helper functions common to test decoders */
-
-static struct plugin_api* rb;
-
-struct mad_stream Stream IDATA_ATTR;
-struct mad_frame Frame IDATA_ATTR;
-struct mad_synth Synth IDATA_ATTR;
-mad_timer_t Timer;
-struct dither d0, d1;
-
-/* The following function is used inside libmad - let's hope it's never
- called.
-*/
-
-void abort(void) {
-}
-
-/* The "dither" code to convert the 24-bit samples produced by libmad was
- taken from the coolplayer project - coolplayer.sourceforge.net */
-
-struct dither {
- mad_fixed_t error[3];
- mad_fixed_t random;
-};
-
-# define SAMPLE_DEPTH 16
-# define scale(x, y) dither((x), (y))
-
-/*
- * NAME: prng()
- * DESCRIPTION: 32-bit pseudo-random number generator
- */
-static __inline
-unsigned long prng(unsigned long state)
-{
- return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
-}
-
-/*
- * NAME: dither()
- * DESCRIPTION: dither and scale sample
- */
-static __inline
-signed int dither(mad_fixed_t sample, struct dither *dither)
-{
- unsigned int scalebits;
- mad_fixed_t output, mask, random;
-
- enum {
- MIN = -MAD_F_ONE,
- MAX = MAD_F_ONE - 1
- };
-
- /* noise shape */
- sample += dither->error[0] - dither->error[1] + dither->error[2];
-
- dither->error[2] = dither->error[1];
- dither->error[1] = dither->error[0] / 2;
-
- /* bias */
- output = sample + (1L << (MAD_F_FRACBITS + 1 - SAMPLE_DEPTH - 1));
-
- scalebits = MAD_F_FRACBITS + 1 - SAMPLE_DEPTH;
- mask = (1L << scalebits) - 1;
-
- /* dither */
- random = prng(dither->random);
- output += (random & mask) - (dither->random & mask);
-
- dither->random = random;
-
- /* clip */
- if (output > MAX) {
- output = MAX;
-
- if (sample > MAX)
- sample = MAX;
- }
- else if (output < MIN) {
- output = MIN;
-
- if (sample < MIN)
- sample = MIN;
- }
-
- /* quantize */
- output &= ~mask;
-
- /* error feedback */
- dither->error[0] = sample - output;
-
- /* scale */
- return output >> scalebits;
-}
-
-#define SHRT_MAX 32767
-
-#define INPUT_BUFFER_SIZE (10*8192)
-#define OUTPUT_BUFFER_SIZE 65536 /* Must be an integer multiple of 4. */
-
-unsigned char InputBuffer[INPUT_BUFFER_SIZE+MAD_BUFFER_GUARD];
-unsigned char OutputBuffer[OUTPUT_BUFFER_SIZE];
-unsigned char *OutputPtr=OutputBuffer;
-unsigned char *GuardPtr=NULL;
-const unsigned char *OutputBufferEnd=OutputBuffer+OUTPUT_BUFFER_SIZE;
-
-mad_fixed_t mad_frame_overlap[2][32][18] IDATA_ATTR;
-unsigned char mad_main_data[MAD_BUFFER_MDLEN] IDATA_ATTR;
-
-#ifdef USE_IRAM
-extern char iramcopy[];
-extern char iramstart[];
-extern char iramend[];
-#endif
-
-/* this is the plugin entry point */
-enum plugin_status plugin_start(struct plugin_api* api, void* file)
-{
- file_info_struct file_info;
- int Status=0;
- unsigned short Sample;
- int i;
-
- /* Generic plugin inititialisation */
-
- TEST_PLUGIN_API(api);
- rb = api;
-
-#ifdef USE_IRAM
- rb->memcpy(iramstart, iramcopy, iramend-iramstart);
-#endif
-
- /* This function sets up the buffers and reads the file into RAM */
-
- if (local_init(file,"/libmadtest.wav",&file_info,api)) {
- return PLUGIN_ERROR;
- }
-
- /* Create a decoder instance */
-
- mad_stream_init(&Stream);
- mad_frame_init(&Frame);
- mad_synth_init(&Synth);
- mad_timer_reset(&Timer);
-
- /* We do this so libmad doesn't try to call codec_calloc() */
- memset(mad_frame_overlap, 0, sizeof(mad_frame_overlap));
- Frame.overlap = &mad_frame_overlap;
- Stream.main_data = &mad_main_data;
-
- GuardPtr = &filebuf[file_info.filesize];
- memset(GuardPtr,0,MAD_BUFFER_GUARD);
- mad_stream_buffer(&Stream, filebuf,file_info.filesize);
-
- file_info.curpos=0;
- file_info.start_tick=*(rb->current_tick);
-
- rb->button_clear_queue();
-
- /* This is the decoding loop. */
- while (file_info.curpos < file_info.filesize &&
- Stream.this_frame != GuardPtr &&
- Stream.error != MAD_ERROR_BUFLEN) {
- file_info.curpos += (int)Stream.next_frame - (int)Stream.this_frame;
-
- if(mad_frame_decode(&Frame,&Stream))
- {
- if(MAD_RECOVERABLE(Stream.error))
- {
- if(Stream.error!=MAD_ERROR_LOSTSYNC || Stream.this_frame!=GuardPtr)
- {
- rb->splash(HZ*1, true, "Recoverable...!");
- }
- continue;
- }
- else
- if(Stream.error==MAD_ERROR_BUFLEN)
- continue;
- else
- {
- rb->splash(HZ*1, true, "Recoverable...!");
- //fprintf(stderr,"%s: unrecoverable frame level error.\n",ProgName);
- Status=1;
- break;
- }
- }
-
- /* We assume all frames have same samplerate as the first */
- if(file_info.frames_decoded==0) {
- file_info.samplerate=Frame.header.samplerate;
- }
-
- file_info.frames_decoded++;
-
- /* ?? Do we need the timer module? */
- mad_timer_add(&Timer,Frame.header.duration);
-
-/* DAVE: This can be used to attenuate the audio */
-// if(DoFilter)
-// ApplyFilter(&Frame);
-
- mad_synth_frame(&Synth,&Frame);
-
- /* Convert MAD's numbers to an array of 16-bit LE signed integers */
- for(i=0;i<Synth.pcm.length;i++)
- {
- /* Left channel */
- Sample=scale(Synth.pcm.samples[0][i],&d0);
- *(OutputPtr++)=Sample&0xff;
- *(OutputPtr++)=Sample>>8;
-
- /* Right channel. If the decoded stream is monophonic then
- * the right output channel is the same as the left one.
- */
- if(MAD_NCHANNELS(&Frame.header)==2)
- Sample=scale(Synth.pcm.samples[1][i],&d1);
- *(OutputPtr++)=Sample&0xff;
- *(OutputPtr++)=Sample>>8;
-
- /* Flush the buffer if it is full. */
- if(OutputPtr==OutputBufferEnd)
- {
- rb->write(file_info.outfile,OutputBuffer,OUTPUT_BUFFER_SIZE);
- OutputPtr=OutputBuffer;
- }
- }
-
- file_info.current_sample+=Synth.pcm.length;
-
- display_status(&file_info);
-
- if (rb->button_get(false)!=BUTTON_NONE) {
- close_wav(&file_info);
- return PLUGIN_OK;
- }
- }
-
- close_wav(&file_info);
- rb->splash(HZ*2, true, "FINISHED!");
-
- return PLUGIN_OK;
-}
-#endif /* CONFIG_HWCODEC == MASNONE */
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