From 685628cf18f815b1ccc80a84590037960b2b4ec1 Mon Sep 17 00:00:00 2001 From: Mohamed Tarek Date: Fri, 14 Aug 2009 17:36:57 +0000 Subject: Support for playback of atrac3 audio in rm, in sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22311 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/atrac3_rm.c | 173 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 apps/codecs/atrac3_rm.c (limited to 'apps/codecs/atrac3_rm.c') diff --git a/apps/codecs/atrac3_rm.c b/apps/codecs/atrac3_rm.c new file mode 100644 index 0000000000..a9c1c49fea --- /dev/null +++ b/apps/codecs/atrac3_rm.c @@ -0,0 +1,173 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * 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 + +#include "logf.h" +#include "codeclib.h" +#include "inttypes.h" +#include "libatrac/atrac3.h" + +CODEC_HEADER + +RMContext rmctx; +RMPacket pkt; +ATRAC3Context q; + +static void init_rm(RMContext *rmctx) +{ + memcpy(rmctx, (void*)(( (intptr_t)ci->id3->id3v2buf + 3 ) &~ 3), sizeof(RMContext)); +} + +/* this is the codec entry point */ +enum codec_status codec_main(void) +{ + static size_t buff_size; + int datasize, res, consumed, i, time_offset; + uint8_t *bit_buffer; + int16_t outbuf[2048] __attribute__((aligned(32))); + uint16_t fs,sps,h; + uint32_t packet_count; + int scrambling_unit_size, num_units, elapsed = 0; + +next_track: + if (codec_init()) { + DEBUGF("codec init failed\n"); + return CODEC_ERROR; + } + while (!*ci->taginfo_ready && !ci->stop_codec) + ci->sleep(1); + + codec_set_replaygain(ci->id3); + ci->memset(&rmctx,0,sizeof(RMContext)); + ci->memset(&pkt,0,sizeof(RMPacket)); + ci->memset(&q,0,sizeof(ATRAC3Context)); + + init_rm(&rmctx); + + ci->configure(DSP_SET_FREQUENCY, ci->id3->frequency); + ci->configure(DSP_SET_SAMPLE_DEPTH, 16); + ci->configure(DSP_SET_STEREO_MODE, rmctx.nb_channels == 1 ? + STEREO_MONO : STEREO_INTERLEAVED); + + packet_count = rmctx.nb_packets; + rmctx.audio_framesize = rmctx.block_align; + rmctx.block_align = rmctx.sub_packet_size; + fs = rmctx.audio_framesize; + sps= rmctx.block_align; + h = rmctx.sub_packet_h; + scrambling_unit_size = h*fs; + + res =atrac3_decode_init(&q, &rmctx); + if(res < 0) { + DEBUGF("failed to initialize atrac decoder\n"); + return CODEC_ERROR; + } + + ci->set_elapsed(0); + ci->advance_buffer(rmctx.data_offset + DATA_HEADER_SIZE); + + /* The main decoder loop */ +seek_start : + while((unsigned)elapsed < rmctx.duration) + { + bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); + consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); + if(consumed < 0) { + DEBUGF("rm_get_packet failed\n"); + return CODEC_ERROR; + } + + for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++) + { + ci->yield(); + if (ci->stop_codec || ci->new_track) + goto done; + + if (ci->seek_time) { + ci->set_elapsed(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); + packet_count = rmctx.nb_packets; + rmctx.audio_pkt_cnt = 0; + rmctx.frame_number = 0; + + /* Seek to the start of the track */ + if (ci->seek_time == 1) { + ci->set_elapsed(0); + ci->seek_complete(); + goto seek_start; + } + num_units = ((ci->seek_time)/(sps*1000*8/rmctx.bit_rate))/(h*(fs/sps)); + ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE + consumed * num_units); + bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); + consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); + if(consumed < 0) { + DEBUGF("rm_get_packet failed\n"); + return CODEC_ERROR; + } + packet_count = rmctx.nb_packets - rmctx.audio_pkt_cnt * num_units; + rmctx.frame_number = ((ci->seek_time)/(sps*1000*8/rmctx.bit_rate)); + while(rmctx.audiotimestamp > (unsigned) ci->seek_time) { + rmctx.audio_pkt_cnt = 0; + ci->seek_buffer(rmctx.data_offset + DATA_HEADER_SIZE + consumed * (num_units-1)); + bit_buffer = (uint8_t *) ci->request_buffer(&buff_size, scrambling_unit_size); + consumed = rm_get_packet(&bit_buffer, &rmctx, &pkt); + packet_count += rmctx.audio_pkt_cnt; + num_units--; + } + time_offset = ci->seek_time - rmctx.audiotimestamp; + i = (time_offset/((sps * 8 * 1000)/rmctx.bit_rate)); + elapsed = rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i; + ci->set_elapsed(elapsed); + ci->seek_complete(); + } + if(pkt.length) + res = atrac3_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i], rmctx.block_align); + else /* indicates that there are no remaining frames */ + goto done; + + if(res != rmctx.block_align) { + DEBUGF("codec error\n"); + return CODEC_ERROR; + } + + if(datasize) + ci->pcmbuf_insert(outbuf, NULL, q.samples_per_frame / rmctx.nb_channels); + elapsed = rmctx.audiotimestamp+(1000*8*sps/rmctx.bit_rate)*i; + ci->set_elapsed(elapsed); + rmctx.frame_number++; + } + packet_count -= rmctx.audio_pkt_cnt; + rmctx.audio_pkt_cnt = 0; + ci->advance_buffer(consumed); + } + + done : + if (ci->request_next_track()) + goto next_track; + + return CODEC_OK; +} -- cgit v1.2.3