forked from len0rd/rockbox
Patch #1352575 - Shorten codec from the ffmpeg project. Rockbox implementation by Mark Arigo.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7814 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman
parent
5592e37c63
commit
2bf9be1c02
14 changed files with 656 additions and 15 deletions
169
apps/codecs/shorten.c
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169
apps/codecs/shorten.c
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/***************************************************************************
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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) 2005 Mark Arigo
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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 "codeclib.h"
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#include <codecs/libffmpegFLAC/shndec.h>
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#ifndef SIMULATOR
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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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struct codec_api* rb;
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struct codec_api* ci;
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#define MAX_DECODED (DEFAULT_BLOCK_SIZE + MAX_NWRAP)
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int32_t decoded0[MAX_DECODED] IBSS_ATTR;
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int32_t decoded1[MAX_DECODED] IBSS_ATTR;
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#define MAX_OFFSETS MAX_NMEAN
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int32_t offset0[MAX_OFFSETS] IBSS_ATTR;
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int32_t offset1[MAX_OFFSETS] IBSS_ATTR;
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/* this is the codec entry point */
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enum codec_status codec_start(struct codec_api* api)
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{
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ShortenContext sc;
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uint32_t samplesdone;
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uint32_t elapsedtime;
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int8_t *buf;
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int cur_chan, consumed, res;
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long bytesleft;
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/* Generic codec initialisation */
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TEST_CODEC_API(api);
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rb = api;
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ci = (struct codec_api*)api;
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#ifndef SIMULATOR
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ci->memcpy(iramstart, iramcopy, iramend-iramstart);
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#endif
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ci->configure(CODEC_SET_FILEBUF_LIMIT, (int *)(1024*1024*10));
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ci->configure(CODEC_SET_FILEBUF_WATERMARK, (int *)(1024*512));
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ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (int *)(1024*128));
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ci->configure(CODEC_DSP_ENABLE, (bool *)true);
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ci->configure(DSP_DITHER, (bool *)false);
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ci->configure(DSP_SET_STEREO_MODE, (long *)STEREO_NONINTERLEAVED);
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ci->configure(DSP_SET_SAMPLE_DEPTH, (int *)(SHN_OUTPUT_DEPTH-1));
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next_track:
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/* Codec initialization */
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if (codec_init(api)) {
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LOGF("Shorten: Error initialising codec\n");
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return CODEC_ERROR;
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}
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while (!*ci->taginfo_ready)
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ci->yield();
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/* Shorten decoder initialization */
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ci->memset(&sc, 0, sizeof(ShortenContext));
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/* Read the shorten & wave headers */
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buf = ci->request_buffer(&bytesleft, MAX_FRAMESIZE);
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res = shorten_init(&sc, buf, bytesleft);
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if (res < 0) {
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LOGF("shorten_init error: %d\n", res);
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return CODEC_ERROR;
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}
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ci->configure(DSP_SET_FREQUENCY, (long *)(sc.sample_rate));
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ci->id3->frequency = sc.sample_rate;
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ci->id3->length = (sc.totalsamples / sc.sample_rate) * 1000;
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consumed = sc.gb.index/8;
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ci->advance_buffer(consumed);
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sc.bitindex = sc.gb.index - 8*consumed;
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seek_start:
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/* The main decoding loop */
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ci->memset(&decoded0, 0, sizeof(int32_t)*MAX_DECODED);
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ci->memset(&decoded1, 0, sizeof(int32_t)*MAX_DECODED);
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ci->memset(&offset0, 0, sizeof(int32_t)*MAX_OFFSETS);
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ci->memset(&offset1, 0, sizeof(int32_t)*MAX_OFFSETS);
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cur_chan = 0;
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samplesdone = 0;
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buf = ci->request_buffer(&bytesleft, MAX_FRAMESIZE);
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while (bytesleft) {
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ci->yield();
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if (ci->stop_codec || ci->reload_codec) {
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break;
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}
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/* Seek to start of track */
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if (ci->seek_time == 1) {
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if (ci->seek_buffer(sc.header_bits/8)) {
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sc.bitindex = sc.header_bits - 8*(sc.header_bits/8);
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ci->set_elapsed(0);
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ci->seek_complete();
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goto seek_start;
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}
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ci->seek_complete();
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}
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/* Decode a frame */
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ci->yield();
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if (cur_chan == 0) {
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res = shorten_decode_frame(&sc, decoded0 + sc.nwrap, offset0,
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buf, bytesleft);
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} else {
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res = shorten_decode_frame(&sc, decoded1 + sc.nwrap, offset1,
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buf, bytesleft);
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}
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cur_chan++;
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if (res == 0 && cur_chan == sc.channels) {
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cur_chan = 0;
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/* Insert decoded samples in pcmbuf */
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ci->yield();
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while (!ci->pcmbuf_insert_split((char*)(decoded0 + sc.nwrap),
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(char*)(decoded1 + sc.nwrap), sc.blocksize*4)) {
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ci->yield();
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}
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/* Update the elapsed-time indicator */
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samplesdone += sc.blocksize;
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elapsedtime = (samplesdone*10) / (sc.sample_rate/100);
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ci->set_elapsed(elapsedtime);
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} else if (res == 1) {
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/* End of shorten stream...go to next track */
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break;
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} else if (res < 0) {
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LOGF("shorten_decode_frame error: \n", res);
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return CODEC_ERROR;
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}
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consumed = sc.gb.index/8;
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ci->advance_buffer(consumed);
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sc.bitindex = sc.gb.index - 8*consumed;
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buf = ci->request_buffer(&bytesleft, MAX_FRAMESIZE);
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}
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LOGF("Shorten: Decoded %d samples\n", samplesdone);
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if (ci->request_next_track())
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goto next_track;
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return CODEC_OK;
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}
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