5ac3545843
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27319 a1c6a512-1295-4272-9138-f99709370657
236 lines
8.3 KiB
C
236 lines
8.3 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) 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 "codeclib.h"
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#include "librm/rm.h"
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#include "libfaad/common.h"
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#include "libfaad/structs.h"
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#include "libfaad/decoder.h"
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#include "libfaad/output.h"
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CODEC_HEADER
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/* Global buffers to be used in the mdct synthesis. This way the arrays can
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* be moved to IRAM for some targets */
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#define GB_BUF_SIZE 1024
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ALIGN real_t gb_time_buffer[2][GB_BUF_SIZE] IBSS_ATTR_FAAD_LARGE_IRAM;
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ALIGN real_t gb_fb_intermed[2][GB_BUF_SIZE] IBSS_ATTR_FAAD_LARGE_IRAM;
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static void init_rm(RMContext *rmctx)
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{
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memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext));
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}
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RMContext rmctx;
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RMPacket pkt;
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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 NeAACDecFrameInfo frame_info;
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NeAACDecHandle decoder;
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size_t n;
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void *ret;
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int needed_bufsize;
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unsigned int i;
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unsigned char* buffer;
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int err, consumed, pkt_offset, skipped = 0;
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uint32_t s = 0; /* sample rate */
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unsigned char c = 0; /* channels */
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int playback_on = -1;
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size_t resume_offset = ci->id3->offset;
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/* Generic codec initialisation */
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ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED);
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ci->configure(DSP_SET_SAMPLE_DEPTH, 29);
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next_track:
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err = CODEC_OK;
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if (codec_init()) {
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DEBUGF("FAAD: Codec init error\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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ci->memset(&rmctx,0,sizeof(RMContext));
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ci->memset(&pkt,0,sizeof(RMPacket));
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init_rm(&rmctx);
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ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
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codec_set_replaygain(ci->id3);
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/* initialise the sound converter */
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decoder = NeAACDecOpen();
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if (!decoder) {
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DEBUGF("FAAD: Decode open error\n");
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err = CODEC_ERROR;
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goto done;
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}
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NeAACDecConfigurationPtr conf = NeAACDecGetCurrentConfiguration(decoder);
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conf->outputFormat = FAAD_FMT_16BIT; /* irrelevant, we don't convert */
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NeAACDecSetConfiguration(decoder, conf);
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decoder->config.defObjectType = rmctx.codec_extradata[0];
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decoder->config.defSampleRate = rmctx.sample_rate;
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err = NeAACDecInit(decoder, NULL, 0, &s, &c);
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if (err) {
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DEBUGF("FAAD: DecInit: %d, %d\n", err, decoder->object_type);
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err = CODEC_ERROR;
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goto done;
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}
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/* Set pointer to be able to use IRAM an to avoid alloc in decoder. Must
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* be called after NeAACDecOpen(). */
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/* A buffer of framelength or 2*frameLenght size must be allocated for
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* time_out. If frameLength is too big or SBR/forceUpSampling is active,
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* we do not use the IRAM buffer and keep faad's internal allocation (see
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* specrec.c). */
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needed_bufsize = decoder->frameLength;
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#ifdef SBR_DEC
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if ((decoder->sbr_present_flag == 1) || (decoder->forceUpSampling == 1))
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{
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needed_bufsize *= 2;
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}
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#endif
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if (needed_bufsize <= GB_BUF_SIZE)
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{
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decoder->time_out[0] = &gb_time_buffer[0][0];
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decoder->time_out[1] = &gb_time_buffer[1][0];
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}
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/* A buffer of with frameLength elements must be allocated for fb_intermed.
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* If frameLength is too big, we do not use the IRAM buffer and keep faad's
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* internal allocation (see specrec.c). */
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needed_bufsize = decoder->frameLength;
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if (needed_bufsize <= GB_BUF_SIZE)
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{
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decoder->fb_intermed[0] = &gb_fb_intermed[0][0];
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decoder->fb_intermed[1] = &gb_fb_intermed[1][0];
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}
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/* check for a mid-track resume and force a seek time accordingly */
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if(resume_offset > rmctx.data_offset + DATA_HEADER_SIZE) {
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resume_offset -= rmctx.data_offset + DATA_HEADER_SIZE;
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/* put number of subpackets to skip in resume_offset */
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resume_offset /= (rmctx.block_align + PACKET_HEADER_SIZE);
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ci->seek_time = (int)resume_offset * ((rmctx.block_align * 8 * 1000)/rmctx.bit_rate);
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}
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ci->id3->frequency = s;
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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 decoding loop */
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seek_start:
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while (1) {
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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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}
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if (ci->seek_time) {
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/* Do not allow seeking beyond the file's length */
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if ((unsigned) ci->seek_time > ci->id3->length) {
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ci->seek_complete();
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goto done;
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}
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ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE);
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/* Seek to the start of the track */
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if (ci->seek_time == 1) {
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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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skipped = 0;
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while(1) {
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buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000);
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pkt_offset = skipped - pkt.length;
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consumed = rm_get_packet(&buffer, &rmctx, &pkt);
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if(consumed < 0 && playback_on != 0) {
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if(playback_on == -1) {
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/* Error only if packet-parsing failed and playback hadn't started */
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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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else
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goto done;
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}
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skipped += pkt.length;
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if(pkt.timestamp > (unsigned)ci->seek_time) break;
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ci->advance_buffer(pkt.length);
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}
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ci->seek_buffer(pkt_offset + rmctx.data_offset + DATA_HEADER_SIZE);
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buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000);
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ci->seek_complete();
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}
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/* Request the required number of bytes from the input buffer */
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buffer=ci->request_buffer(&n,rmctx.audio_framesize + 1000);
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consumed = rm_get_packet(&buffer, &rmctx, &pkt);
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if(consumed < 0 && playback_on != 0) {
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if(playback_on == -1) {
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/* Error only if packet-parsing failed and playback hadn't started */
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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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else
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goto done;
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}
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playback_on = 1;
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if (pkt.timestamp >= ci->id3->length)
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goto done;
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/* Decode one block - returned samples will be host-endian */
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for(i = 0; i < rmctx.sub_packet_cnt; i++) {
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ret = NeAACDecDecode(decoder, &frame_info, buffer, rmctx.sub_packet_lengths[i]);
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buffer += rmctx.sub_packet_lengths[i];
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if (frame_info.error > 0) {
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DEBUGF("FAAD: decode error '%s'\n", NeAACDecGetErrorMessage(frame_info.error));
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err = CODEC_ERROR;
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goto exit;
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}
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ci->pcmbuf_insert(decoder->time_out[0],
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decoder->time_out[1],
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decoder->frameLength);
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ci->set_elapsed(pkt.timestamp);
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}
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ci->advance_buffer(pkt.length);
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}
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err = 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 err;
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}
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