/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2009 Mohamed Tarek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "codeclib.h" #include "librm/rm.h" #include "libfaad/common.h" #include "libfaad/structs.h" #include "libfaad/decoder.h" #include "libfaad/output.h" CODEC_HEADER /* Global buffers to be used in the mdct synthesis. This way the arrays can * be moved to IRAM for some targets */ #define GB_BUF_SIZE 1024 ALIGN real_t gb_time_buffer[2][GB_BUF_SIZE] IBSS_ATTR_FAAD_LARGE_IRAM; ALIGN real_t gb_fb_intermed[2][GB_BUF_SIZE] IBSS_ATTR_FAAD_LARGE_IRAM; static void init_rm(RMContext *rmctx) { memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext)); } RMContext rmctx; RMPacket pkt; /* this is the codec entry point */ enum codec_status codec_main(void) { static NeAACDecFrameInfo frame_info; NeAACDecHandle decoder; size_t n; void *ret; int needed_bufsize; unsigned int i; unsigned char* buffer; int err, consumed, pkt_offset, skipped = 0; uint32_t s = 0; /* sample rate */ unsigned char c = 0; /* channels */ int playback_on = -1; size_t resume_offset = ci->id3->offset; /* Generic codec initialisation */ ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED); ci->configure(DSP_SET_SAMPLE_DEPTH, 29); next_track: err = CODEC_OK; if (codec_init()) { DEBUGF("FAAD: Codec init error\n"); return CODEC_ERROR; } while (!*ci->taginfo_ready && !ci->stop_codec) ci->sleep(1); ci->memset(&rmctx,0,sizeof(RMContext)); ci->memset(&pkt,0,sizeof(RMPacket)); init_rm(&rmctx); ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); codec_set_replaygain(ci->id3); /* initialise the sound converter */ decoder = NeAACDecOpen(); if (!decoder) { DEBUGF("FAAD: Decode open error\n"); err = CODEC_ERROR; goto done; } NeAACDecConfigurationPtr conf = NeAACDecGetCurrentConfiguration(decoder); conf->outputFormat = FAAD_FMT_16BIT; /* irrelevant, we don't convert */ NeAACDecSetConfiguration(decoder, conf); decoder->config.defObjectType = rmctx.codec_extradata[0]; decoder->config.defSampleRate = rmctx.sample_rate; err = NeAACDecInit(decoder, NULL, 0, &s, &c); if (err) { DEBUGF("FAAD: DecInit: %d, %d\n", err, decoder->object_type); err = CODEC_ERROR; goto done; } /* Set pointer to be able to use IRAM an to avoid alloc in decoder. Must * be called after NeAACDecOpen(). */ /* A buffer of framelength or 2*frameLenght size must be allocated for * time_out. If frameLength is too big or SBR/forceUpSampling is active, * we do not use the IRAM buffer and keep faad's internal allocation (see * specrec.c). */ needed_bufsize = decoder->frameLength; #ifdef SBR_DEC if ((decoder->sbr_present_flag == 1) || (decoder->forceUpSampling == 1)) { needed_bufsize *= 2; } #endif if (needed_bufsize <= GB_BUF_SIZE) { decoder->time_out[0] = &gb_time_buffer[0][0]; decoder->time_out[1] = &gb_time_buffer[1][0]; } /* A buffer of with frameLength elements must be allocated for fb_intermed. * If frameLength is too big, we do not use the IRAM buffer and keep faad's * internal allocation (see specrec.c). */ needed_bufsize = decoder->frameLength; if (needed_bufsize <= GB_BUF_SIZE) { decoder->fb_intermed[0] = &gb_fb_intermed[0][0]; decoder->fb_intermed[1] = &gb_fb_intermed[1][0]; } /* check for a mid-track resume and force a seek time accordingly */ if(resume_offset > rmctx.data_offset + DATA_HEADER_SIZE) { resume_offset -= rmctx.data_offset + DATA_HEADER_SIZE; /* put number of subpackets to skip in resume_offset */ resume_offset /= (rmctx.block_align + PACKET_HEADER_SIZE); ci->seek_time = (int)resume_offset * ((rmctx.block_align * 8 * 1000)/rmctx.bit_rate); } ci->id3->frequency = s; ci->set_elapsed(0); ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE); /* The main decoding loop */ seek_start: while (1) { ci->yield(); if (ci->stop_codec || ci->new_track) { break; } if (ci->seek_time) { /* Do not allow seeking beyond the file's length */ if ((unsigned) ci->seek_time > ci->id3->length) { ci->seek_complete(); goto done; } ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE); /* Seek to the start of the track */ if (ci->seek_time == 1) { ci->set_elapsed(0); ci->seek_complete(); goto seek_start; } skipped = 0; while(1) { buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000); pkt_offset = skipped - pkt.length; consumed = rm_get_packet(&buffer, &rmctx, &pkt); if(consumed < 0 && playback_on != 0) { if(playback_on == -1) { /* Error only if packet-parsing failed and playback hadn't started */ DEBUGF("rm_get_packet failed\n"); return CODEC_ERROR; } else goto done; } skipped += pkt.length; if(pkt.timestamp > (unsigned)ci->seek_time) break; ci->advance_buffer(pkt.length); } ci->seek_buffer(pkt_offset + rmctx.data_offset + DATA_HEADER_SIZE); buffer = ci->request_buffer(&n,rmctx.audio_framesize + 1000); ci->seek_complete(); } /* Request the required number of bytes from the input buffer */ buffer=ci->request_buffer(&n,rmctx.audio_framesize + 1000); consumed = rm_get_packet(&buffer, &rmctx, &pkt); if(consumed < 0 && playback_on != 0) { if(playback_on == -1) { /* Error only if packet-parsing failed and playback hadn't started */ DEBUGF("rm_get_packet failed\n"); return CODEC_ERROR; } else goto done; } playback_on = 1; if (pkt.timestamp >= ci->id3->length) goto done; /* Decode one block - returned samples will be host-endian */ for(i = 0; i < rmctx.sub_packet_cnt; i++) { ret = NeAACDecDecode(decoder, &frame_info, buffer, rmctx.sub_packet_lengths[i]); buffer += rmctx.sub_packet_lengths[i]; if (frame_info.error > 0) { DEBUGF("FAAD: decode error '%s'\n", NeAACDecGetErrorMessage(frame_info.error)); err = CODEC_ERROR; goto exit; } ci->pcmbuf_insert(decoder->time_out[0], decoder->time_out[1], decoder->frameLength); ci->set_elapsed(pkt.timestamp); } ci->advance_buffer(pkt.length); } err = CODEC_OK; done: if (ci->request_next_track()) goto next_track; exit: return err; }