/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 Thom Johansen * * 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 #include CODEC_HEADER static MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH] IBSS_ATTR; /* Our implementations of the mpc_reader callback functions. */ static mpc_int32_t read_impl(mpc_reader *reader, void *ptr, mpc_int32_t size) { (void)reader; return ((mpc_int32_t)(ci->read_filebuf(ptr, size))); } static mpc_bool_t seek_impl(mpc_reader *reader, mpc_int32_t offset) { (void)reader; return ci->seek_buffer(offset); } static mpc_int32_t tell_impl(mpc_reader *reader) { (void)reader; return ci->curpos; } static mpc_int32_t get_size_impl(mpc_reader *reader) { (void)reader; return ci->filesize; } /* this is the codec entry point */ enum codec_status codec_main(enum codec_entry_call_reason reason) { if (reason == CODEC_LOAD) { /* musepack's sample representation is 18.14 * DSP_SET_SAMPLE_DEPTH = 14 (FRACT) + 16 (NATIVE) - 1 (SIGN) = 29 */ ci->configure(DSP_SET_SAMPLE_DEPTH, 29); } return CODEC_OK; } /* this is called for each file to process */ enum codec_status codec_run(void) { mpc_int64_t samplesdone; uint32_t frequency; /* 0.1 kHz accuracy */ uint32_t elapsed_time; /* milliseconds */ uint32_t byterate; /* bytes per second */ mpc_status status; mpc_reader reader; mpc_streaminfo info; mpc_frame_info frame; mpc_demux *demux = NULL; intptr_t param; frame.buffer = sample_buffer; /* Create a decoder instance */ reader.read = read_impl; reader.seek = seek_impl; reader.tell = tell_impl; reader.get_size = get_size_impl; if (codec_init()) return CODEC_ERROR; /* Prep position */ ci->seek_buffer(0); /* Initialize demux/decoder. */ demux = mpc_demux_init(&reader); if (NULL == demux) return CODEC_ERROR; /* Read file's streaminfo data. */ mpc_demux_get_info(demux, &info); byterate = (mpc_uint32_t)(info.average_bitrate) / 8; frequency = info.sample_freq / 100; /* 0.1 kHz accuracy */ ci->configure(DSP_SET_FREQUENCY, info.sample_freq); /* Remark: rockbox offset is the file offset in bytes. So, estimate the * sample seek position from the file offset, the sampling frequency and * the bitrate. As the saved position is exactly calculated the reverse way * there is no loss of information except rounding. */ elapsed_time = ci->id3->elapsed; samplesdone = 100 * (((mpc_uint64_t)ci->id3->offset * frequency) / byterate); /* Set up digital signal processing for correct number of channels */ /* NOTE: current musepack format only allows for stereo files but code is here to handle other configurations anyway */ if (info.channels == 2) ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED); else if (info.channels == 1) ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); else return CODEC_ERROR; codec_set_replaygain(ci->id3); if (samplesdone > 0 || elapsed_time) { mpc_int64_t new_offset = samplesdone; if (new_offset <= 0) new_offset = (elapsed_time/10)*frequency; /* by time */ /* Resume to sample offset. */ if (mpc_demux_seek_sample(demux, new_offset) == MPC_STATUS_OK) { samplesdone = new_offset; } else { samplesdone = 0; } elapsed_time = (samplesdone*10)/frequency; } ci->set_elapsed(elapsed_time); /* This is the decoding loop. */ do { enum codec_command_action action = ci->get_command(¶m); if (action == CODEC_ACTION_HALT) return CODEC_OK; /* Complete seek handler. */ if (action == CODEC_ACTION_SEEK_TIME) { mpc_int64_t new_offset = (param/10)*frequency; if (mpc_demux_seek_sample(demux, new_offset) == MPC_STATUS_OK) { samplesdone = new_offset; } elapsed_time = (samplesdone*10)/frequency; ci->set_elapsed(elapsed_time); ci->seek_complete(); } /* Decode one frame. */ status = mpc_demux_decode(demux, &frame); ci->yield(); if (frame.bits == -1) { /* Decoding error, exit decoding loop. */ return (status == MPC_STATUS_OK) ? CODEC_OK : CODEC_ERROR; } else { /* Decoding passed, insert samples to PCM buffer. */ ci->pcmbuf_insert(frame.buffer, frame.buffer + MPC_FRAME_LENGTH, frame.samples); samplesdone += frame.samples; elapsed_time = (samplesdone*10)/frequency; ci->set_elapsed(elapsed_time); /* Remark: rockbox offset is the file offset in bytes. So estimate * this offset from the samples, sampling frequency and bitrate */ ci->set_offset( (samplesdone * byterate)/(frequency*100) ); } } while (true); } >89 90 91 92 93 94 95 96 97 98 99 100 101 102 
/* Copyright (C) 2006 Jean-Marc Valin 
   File: window.c

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
   
   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
   
   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
   
   - Neither the name of the Xiph.org Foundation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.
   
   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifdef HAVE_CONFIG_H
#include "config-speex.h"
#endif

#include "arch.h"

#ifdef FIXED_POINT
const spx_word16_t lag_window[11] ICONST_ATTR = {
   16384, 16337, 16199, 15970, 15656, 15260, 14790, 14254, 13659, 13015, 12330
};

const spx_word16_t lpc_window[200] ICONST_ATTR = {
1310, 1313, 1321, 1333, 1352, 1375, 1403, 1436,
1475, 1518, 1567, 1621, 1679, 1743, 1811, 1884,
1962, 2044, 2132, 2224, 2320, 2421, 2526, 2636,
2750, 2868, 2990, 3116, 3246, 3380, 3518, 3659,
3804, 3952, 4104, 4259, 4417, 4578, 4742, 4909,
5079, 5251, 5425, 5602, 5781, 5963, 6146, 6331,
6518, 6706, 6896, 7087, 7280, 7473, 7668, 7863,
8059, 8256, 8452, 8650, 8847, 9044, 9241, 9438,
9635, 9831, 10026, 10220, 10414, 10606, 10797, 10987,
11176, 11363, 11548, 11731, 11912, 12091, 12268, 12443,
12615, 12785, 12952, 13116, 13277, 13435, 13590, 13742,
13890, 14035, 14176, 14314, 14448, 14578, 14704, 14826,
14944, 15058, 15168, 15273, 15374, 15470, 15562, 15649,
15732, 15810, 15883, 15951, 16015, 16073, 16127, 16175,
16219, 16257, 16291, 16319, 16342, 16360, 16373, 16381,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384,
16384, 16384, 16384, 16361, 16294, 16183, 16028, 15830,
15588, 15304, 14979, 14613, 14207, 13763, 13282, 12766,
12215, 11631, 11016, 10373, 9702, 9007, 8289, 7551,
6797, 6028, 5251, 4470, 3695, 2943, 2248, 1696
};
#else
const spx_word16_t lag_window[11] = {
   1.00000, 0.99716, 0.98869, 0.97474, 0.95554, 0.93140, 0.90273, 0.86998, 0.83367, 0.79434, 0.75258
};

const spx_word16_t lpc_window[200] = {
   0.080000f, 0.080158f, 0.080630f, 0.081418f, 0.082520f, 0.083935f, 0.085663f, 0.087703f,
   0.090052f, 0.092710f, 0.095674f, 0.098943f, 0.102514f, 0.106385f, 0.110553f, 0.115015f,
   0.119769f, 0.124811f, 0.130137f, 0.135744f, 0.141628f, 0.147786f, 0.154212f, 0.160902f,
   0.167852f, 0.175057f, 0.182513f, 0.190213f, 0.198153f, 0.206328f, 0.214731f, 0.223357f,
   0.232200f, 0.241254f, 0.250513f, 0.259970f, 0.269619f, 0.279453f, 0.289466f, 0.299651f,
   0.310000f, 0.320507f, 0.331164f, 0.341965f, 0.352901f, 0.363966f, 0.375151f, 0.386449f,
   0.397852f, 0.409353f, 0.420943f, 0.432615f, 0.444361f, 0.456172f, 0.468040f, 0.479958f,
   0.491917f, 0.503909f, 0.515925f, 0.527959f, 0.540000f, 0.552041f, 0.564075f, 0.576091f,
   0.588083f, 0.600042f, 0.611960f, 0.623828f, 0.635639f, 0.647385f, 0.659057f, 0.670647f,
   0.682148f, 0.693551f, 0.704849f, 0.716034f, 0.727099f, 0.738035f, 0.748836f, 0.759493f,
   0.770000f, 0.780349f, 0.790534f, 0.800547f, 0.810381f, 0.820030f, 0.829487f, 0.838746f,
   0.847800f, 0.856643f, 0.865269f, 0.873672f, 0.881847f, 0.889787f, 0.897487f, 0.904943f,
   0.912148f, 0.919098f, 0.925788f, 0.932214f, 0.938372f, 0.944256f, 0.949863f, 0.955189f,
   0.960231f, 0.964985f, 0.969447f, 0.973615f, 0.977486f, 0.981057f, 0.984326f, 0.987290f,
   0.989948f, 0.992297f, 0.994337f, 0.996065f, 0.997480f, 0.998582f, 0.999370f, 0.999842f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
   1.000000f, 1.000000f, 1.000000f, 0.998640f, 0.994566f, 0.987787f, 0.978324f, 0.966203f,
   0.951458f, 0.934131f, 0.914270f, 0.891931f, 0.867179f, 0.840084f, 0.810723f, 0.779182f,
   0.745551f, 0.709930f, 0.672424f, 0.633148f, 0.592223f, 0.549781f, 0.505964f, 0.460932f,
   0.414863f, 0.367968f, 0.320511f, 0.272858f, 0.225569f, 0.179655f, 0.137254f, 0.103524f
};
#endif
generated by cgit v1.1 at 2026-05-14 08:40:01 +0000