f3bc1efc49
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9758 a1c6a512-1295-4272-9138-f99709370657
153 lines
4.2 KiB
C
153 lines
4.2 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) 2005 David Bryant
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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 "libwavpack/wavpack.h"
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CODEC_HEADER
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static struct codec_api *ci;
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#define BUFFER_SIZE 4096
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static int32_t temp_buffer [BUFFER_SIZE] IBSS_ATTR;
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static int32_t read_callback (void *buffer, int32_t bytes)
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{
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int32_t retval = ci->read_filebuf (buffer, bytes);
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ci->id3->offset = ci->curpos;
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return retval;
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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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extern char iedata[];
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extern char iend[];
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#endif
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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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WavpackContext *wpc;
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char error [80];
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int bps, nchans, sr_100;
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int retval;
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/* Generic codec initialisation */
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ci = api;
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#ifdef USE_IRAM
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ci->memcpy(iramstart, iramcopy, iramend-iramstart);
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ci->memset(iedata, 0, iend - iedata);
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#endif
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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(DSP_DITHER, (bool *)false);
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ci->configure(DSP_SET_SAMPLE_DEPTH, (int *)(28));
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next_track:
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if (codec_init(api)) {
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retval = CODEC_ERROR;
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goto exit;
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}
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while (!*ci->taginfo_ready && !ci->stop_codec)
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ci->sleep(1);
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ci->configure(DSP_SET_FREQUENCY, (long *)(ci->id3->frequency));
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codec_set_replaygain(ci->id3);
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/* Create a decoder instance */
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wpc = WavpackOpenFileInput (read_callback, error);
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if (!wpc) {
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retval = CODEC_ERROR;
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goto done;
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}
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bps = WavpackGetBytesPerSample (wpc);
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nchans = WavpackGetReducedChannels (wpc);
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ci->configure(DSP_SET_STEREO_MODE, nchans == 2 ? (int *)STEREO_INTERLEAVED : (int *)STEREO_MONO);
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sr_100 = ci->id3->frequency / 100;
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ci->set_elapsed (0);
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/* The main decoder loop */
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while (1) {
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int32_t nsamples;
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if (ci->seek_time && ci->taginfo_ready && ci->id3->length) {
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ci->seek_time--;
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int curpos_ms = WavpackGetSampleIndex (wpc) / sr_100 * 10;
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int n, d, skip;
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if (ci->seek_time > curpos_ms) {
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n = ci->seek_time - curpos_ms;
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d = ci->id3->length - curpos_ms;
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skip = (int)((int64_t)(ci->filesize - ci->curpos) * n / d);
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ci->seek_buffer (ci->curpos + skip);
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}
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else {
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n = curpos_ms - ci->seek_time;
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d = curpos_ms;
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skip = (int)((int64_t) ci->curpos * n / d);
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ci->seek_buffer (ci->curpos - skip);
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}
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wpc = WavpackOpenFileInput (read_callback, error);
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ci->seek_complete();
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if (!wpc)
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break;
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ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10);
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ci->yield ();
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}
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nsamples = WavpackUnpackSamples (wpc, temp_buffer, BUFFER_SIZE / nchans);
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if (!nsamples || ci->stop_codec || ci->new_track)
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break;
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ci->yield ();
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if (ci->stop_codec || ci->new_track)
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break;
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while (!ci->pcmbuf_insert ((char *) temp_buffer, nsamples * nchans * 4))
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ci->sleep (1);
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ci->set_elapsed (WavpackGetSampleIndex (wpc) / sr_100 * 10);
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ci->yield ();
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}
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retval = CODEC_OK;
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done:
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if (ci->request_next_track())
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goto next_track;
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exit:
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return retval;
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}
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