24967bd552
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21717 a1c6a512-1295-4272-9138-f99709370657
144 lines
4.5 KiB
C
144 lines
4.5 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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* Copyright (C) 2009 Mohamed Tarek
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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 <string.h>
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#include "logf.h"
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#include "codeclib.h"
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#include "inttypes.h"
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#include "libcook/cook.h"
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#define DATA_HEADER_SIZE 18 /* size of DATA chunk header in a rm file */
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CODEC_HEADER
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RMContext rmctx;
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RMPacket pkt;
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COOKContext q;
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static void init_rm(RMContext *rmctx)
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{
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memcpy(rmctx, (void*)(( (int)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext));
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}
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/* this is the codec entry point */
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enum codec_status codec_main(void)
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{
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static size_t buff_size;
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int datasize, res, consumed,i;
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uint8_t *bit_buffer;
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int16_t outbuf[2048] __attribute__((aligned(32)));
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uint16_t fs,sps,h;
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uint32_t packet_count;
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int scrambling_unit_size;
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next_track:
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if (codec_init()) {
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DEBUGF("codec init failed\n");
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return CODEC_ERROR;
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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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codec_set_replaygain(ci->id3);
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ci->memset(&rmctx,0,sizeof(RMContext));
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ci->memset(&pkt,0,sizeof(RMPacket));
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ci->memset(&q,0,sizeof(COOKContext));
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init_rm(&rmctx);
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ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency);
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ci->configure(DSP_SET_SAMPLE_DEPTH, 16);
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ci->configure(DSP_SET_STEREO_MODE, rmctx.nb_channels == 1 ?
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STEREO_MONO : STEREO_INTERLEAVED);
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packet_count = rmctx.nb_packets;
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rmctx.audio_framesize = rmctx.block_align;
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rmctx.block_align = rmctx.sub_packet_size;
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fs = rmctx.audio_framesize;
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sps= rmctx.block_align;
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h = rmctx.sub_packet_h;
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scrambling_unit_size = h*fs;
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res =cook_decode_init(&rmctx, &q);
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if(res < 0) {
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DEBUGF("failed to initialize cook decoder\n");
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return CODEC_ERROR;
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}
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ci->set_elapsed(0);
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ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE);
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/* The main decoder loop */
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while (1)
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{
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/*if (ci->seek_time) {
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ci->set_elapsed(ci->seek_time);
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n = ci->seek_time/10;
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memset(buf,0,BUF_SIZE);
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ci->seek_complete();
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}*/
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while(packet_count)
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{
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bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size);
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consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt);
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if(consumed < 0) {
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DEBUGF("rm_get_packet failed\n");
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return CODEC_ERROR;
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}
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/*DEBUGF(" version = %d\n"
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" length = %d\n"
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" stream = %d\n"
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" timestamp= %d\n",pkt.version,pkt.length,pkt.stream_number,pkt.timestamp);*/
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for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++)
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{
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ci->yield();
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if (ci->stop_codec || ci->new_track)
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goto done;
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res = cook_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i], rmctx.block_align);
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rmctx.frame_number++;
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/* skip the first two frames; no valid audio */
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if(rmctx.frame_number < 3) continue;
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if(res != rmctx.block_align) {
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DEBUGF("codec error\n");
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return CODEC_ERROR;
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}
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ci->pcmbuf_insert(outbuf, NULL, rmctx.samples_pf_pc / rmctx.nb_channels);
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ci->set_elapsed(rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i);
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}
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packet_count -= rmctx.audio_pkt_cnt;
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rmctx.audio_pkt_cnt = 0;
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ci->advance_buffer(consumed);
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}
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goto done;
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}
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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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return CODEC_OK;
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}
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