263 lines
11 KiB
C
263 lines
11 KiB
C
/*
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Copyright (c) 2005-2009, The Musepack Development Team
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of the The Musepack Development Team nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/// \file streaminfo.c
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/// Implementation of streaminfo reading functions.
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#include <math.h>
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#include <mpc/mpcdec.h>
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#include <mpc/streaminfo.h>
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#include <stdio.h>
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#include "internal.h"
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#include "huffman.h"
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#include "mpc_bits_reader.h"
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static const int crc32_table[256]={0x0,0x77073096,0xee0e612c,0x990951ba,0x76dc419,0x706af48f,0xe963a535,0x9e6495a3,0xedb8832,0x79dcb8a4,0xe0d5e91e,0x97d2d988,0x9b64c2b,0x7eb17cbd,0xe7b82d07,0x90bf1d91,0x1db71064,0x6ab020f2,0xf3b97148,0x84be41de,0x1adad47d,0x6ddde4eb,0xf4d4b551,0x83d385c7,0x136c9856,0x646ba8c0,0xfd62f97a,0x8a65c9ec,0x14015c4f,0x63066cd9,0xfa0f3d63,0x8d080df5,0x3b6e20c8,0x4c69105e,0xd56041e4,0xa2677172,0x3c03e4d1,0x4b04d447,0xd20d85fd,0xa50ab56b,0x35b5a8fa,0x42b2986c,0xdbbbc9d6,0xacbcf940,0x32d86ce3,0x45df5c75,0xdcd60dcf,0xabd13d59,0x26d930ac,0x51de003a,0xc8d75180,0xbfd06116,0x21b4f4b5,0x56b3c423,0xcfba9599,0xb8bda50f,0x2802b89e,0x5f058808,0xc60cd9b2,0xb10be924,0x2f6f7c87,0x58684c11,0xc1611dab,0xb6662d3d,0x76dc4190,0x1db7106,0x98d220bc,0xefd5102a,0x71b18589,0x6b6b51f,0x9fbfe4a5,0xe8b8d433,0x7807c9a2,0xf00f934,0x9609a88e,0xe10e9818,0x7f6a0dbb,0x86d3d2d,0x91646c97,0xe6635c01,0x6b6b51f4,0x1c6c6162,0x856530d8,0xf262004e,0x6c0695ed,0x1b01a57b,0x8208f4c1,0xf50fc457,0x65b0d9c6,0x12b7e950,0x8bbeb8ea,0xfcb9887c,0x62dd1ddf,0x15da2d49,0x8cd37cf3,0xfbd44c65,0x4db26158,0x3ab551ce,0xa3bc0074,0xd4bb30e2,0x4adfa541,0x3dd895d7,0xa4d1c46d,0xd3d6f4fb,0x4369e96a,0x346ed9fc,0xad678846,0xda60b8d0,0x44042d73,0x33031de5,0xaa0a4c5f,0xdd0d7cc9,0x5005713c,0x270241aa,0xbe0b1010,0xc90c2086,0x5768b525,0x206f85b3,0xb966d409,0xce61e49f,0x5edef90e,0x29d9c998,0xb0d09822,0xc7d7a8b4,0x59b33d17,0x2eb40d81,0xb7bd5c3b,0xc0ba6cad,0xedb88320,0x9abfb3b6,0x3b6e20c,0x74b1d29a,0xead54739,0x9dd277af,0x4db2615,0x73dc1683,0xe3630b12,0x94643b84,0xd6d6a3e,0x7a6a5aa8,0xe40ecf0b,0x9309ff9d,0xa00ae27,0x7d079eb1,0xf00f9344,0x8708a3d2,0x1e01f268,0x6906c2fe,0xf762575d,0x806567cb,0x196c3671,0x6e6b06e7,0xfed41b76,0x89d32be0,0x10da7a5a,0x67dd4acc,0xf9b9df6f,0x8ebeeff9,0x17b7be43,0x60b08ed5,0xd6d6a3e8,0xa1d1937e,0x38d8c2c4,0x4fdff252,0xd1bb67f1,0xa6bc5767,0x3fb506dd,0x48b2364b,0xd80d2bda,0xaf0a1b4c,0x36034af6,0x41047a60,0xdf60efc3,0xa867df55,0x316e8eef,0x4669be79,0xcb61b38c,0xbc66831a,0x256fd2a0,0x5268e236,0xcc0c7795,0xbb0b4703,0x220216b9,0x5505262f,0xc5ba3bbe,0xb2bd0b28,0x2bb45a92,0x5cb36a04,0xc2d7ffa7,0xb5d0cf31,0x2cd99e8b,0x5bdeae1d,0x9b64c2b0,0xec63f226,0x756aa39c,0x26d930a,0x9c0906a9,0xeb0e363f,0x72076785,0x5005713,0x95bf4a82,0xe2b87a14,0x7bb12bae,0xcb61b38,0x92d28e9b,0xe5d5be0d,0x7cdcefb7,0xbdbdf21,0x86d3d2d4,0xf1d4e242,0x68ddb3f8,0x1fda836e,0x81be16cd,0xf6b9265b,0x6fb077e1,0x18b74777,0x88085ae6,0xff0f6a70,0x66063bca,0x11010b5c,0x8f659eff,0xf862ae69,0x616bffd3,0x166ccf45,0xa00ae278,0xd70dd2ee,0x4e048354,0x3903b3c2,0xa7672661,0xd06016f7,0x4969474d,0x3e6e77db,0xaed16a4a,0xd9d65adc,0x40df0b66,0x37d83bf0,0xa9bcae53,0xdebb9ec5,0x47b2cf7f,0x30b5ffe9,0xbdbdf21c,0xcabac28a,0x53b39330,0x24b4a3a6,0xbad03605,0xcdd70693,0x54de5729,0x23d967bf,0xb3667a2e,0xc4614ab8,0x5d681b02,0x2a6f2b94,0xb40bbe37,0xc30c8ea1,0x5a05df1b,0x2d02ef8d};
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static unsigned int update_crc(unsigned int crc, unsigned char *buf, int len)
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{
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unsigned int c = crc;
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int n;
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for (n = 0; n < len; n++) {
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c = crc32_table[(c ^ buf[n]) & 0xff] ^ (c >> 8);
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}
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return c;
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}
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static unsigned int crc32(unsigned char *buf, int len)
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{
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return update_crc(0xffffffffL, buf, len) ^ 0xffffffffL;
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}
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static const char na[] = "n.a.";
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static char const * const versionNames[] = {
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na, "'Unstable/Experimental'", na, na, na, "'quality 0'", "'quality 1'",
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"'Telephone'", "'Thumb'", "'Radio'", "'Standard'", "'Extreme'", "'Insane'",
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"'BrainDead'", "'quality 9'", "'quality 10'"
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};
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static const mpc_int32_t samplefreqs[8] = { 44100, 48000, 37800, 32000 };
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static const char *
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mpc_get_version_string(float profile) // profile is 0...15, where 7...13 is used
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{
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return profile >= sizeof versionNames / sizeof *versionNames ? na : versionNames[(int)profile];
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}
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static void
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mpc_get_encoder_string(mpc_streaminfo* si)
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{
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int ver = si->encoder_version;
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if (si->stream_version >= 8)
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ver = (si->encoder_version >> 24) * 100 + ((si->encoder_version >> 16) & 0xFF);
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if (ver <= 116) {
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if (ver == 0) {
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sprintf(si->encoder, "Buschmann 1.7.0...9, Klemm 0.90...1.05");
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} else {
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switch (ver % 10) {
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case 0:
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sprintf(si->encoder, "Release %u.%u", ver / 100,
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ver / 10 % 10);
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break;
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case 2: case 4: case 6: case 8:
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sprintf(si->encoder, "Beta %u.%02u", ver / 100,
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ver % 100);
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break;
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default:
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sprintf(si->encoder, "--Alpha-- %u.%02u",
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ver / 100, ver % 100);
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break;
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}
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}
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} else {
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int major = si->encoder_version >> 24;
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int minor = (si->encoder_version >> 16) & 0xFF;
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int build = (si->encoder_version >> 8) & 0xFF;
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char * tmp = "--Stable--";
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if (minor & 1)
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tmp = "--Unstable--";
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sprintf(si->encoder, "%s %u.%u.%u", tmp, major, minor, build);
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}
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}
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static mpc_status check_streaminfo(mpc_streaminfo * si)
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{
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if (si->max_band == 0 || si->max_band >= 32
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|| si->channels > 2)
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return MPC_STATUS_FILE;
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return MPC_STATUS_OK;
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}
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/// Reads streaminfo from SV7 header.
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mpc_status
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streaminfo_read_header_sv7(mpc_streaminfo* si, mpc_bits_reader * r)
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{
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mpc_uint16_t Estimatedpeak_title = 0;
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mpc_uint32_t frames, last_frame_samples;
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si->bitrate = 0;
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frames = (mpc_bits_read(r, 16) << 16) | mpc_bits_read(r, 16);
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mpc_bits_read(r, 1); // intensity stereo : should be 0
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si->ms = mpc_bits_read(r, 1);
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si->max_band = mpc_bits_read(r, 6);
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si->profile = mpc_bits_read(r, 4);
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si->profile_name = mpc_get_version_string(si->profile);
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mpc_bits_read(r, 2); // Link ?
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si->sample_freq = samplefreqs[mpc_bits_read(r, 2)];
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Estimatedpeak_title = (mpc_uint16_t) mpc_bits_read(r, 16); // read the ReplayGain data
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si->gain_title = (mpc_uint16_t) mpc_bits_read(r, 16);
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si->peak_title = (mpc_uint16_t) mpc_bits_read(r, 16);
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si->gain_album = (mpc_uint16_t) mpc_bits_read(r, 16);
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si->peak_album = (mpc_uint16_t) mpc_bits_read(r, 16);
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si->is_true_gapless = mpc_bits_read(r, 1); // true gapless: used?
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last_frame_samples = mpc_bits_read(r, 11); // true gapless: valid samples for last frame
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si->fast_seek = mpc_bits_read(r, 1); // fast seeking
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mpc_bits_read(r, 19); // unused
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si->encoder_version = mpc_bits_read(r, 8);
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si->channels = 2;
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si->block_pwr = 0;
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// convert gain info
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if (si->gain_title != 0) {
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int tmp = (int)((MPC_OLD_GAIN_REF - (mpc_int16_t)si->gain_title / 100.) * 256. + .5);
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if (tmp >= (1 << 16) || tmp < 0) tmp = 0;
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si->gain_title = (mpc_int16_t) tmp;
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}
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if (si->gain_album != 0) {
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int tmp = (int)((MPC_OLD_GAIN_REF - (mpc_int16_t)si->gain_album / 100.) * 256. + .5);
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if (tmp >= (1 << 16) || tmp < 0) tmp = 0;
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si->gain_album = (mpc_int16_t) tmp;
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}
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if (si->peak_title != 0)
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si->peak_title = (mpc_uint16_t) (log10(si->peak_title) * 20 * 256 + .5);
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if (si->peak_album != 0)
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si->peak_album = (mpc_uint16_t) (log10(si->peak_album) * 20 * 256 + .5);
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mpc_get_encoder_string(si);
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if (last_frame_samples == 0) last_frame_samples = MPC_FRAME_LENGTH;
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si->samples = (mpc_int64_t) frames * MPC_FRAME_LENGTH;
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if (si->is_true_gapless)
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si->samples -= (MPC_FRAME_LENGTH - last_frame_samples);
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else
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si->samples -= MPC_DECODER_SYNTH_DELAY;
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si->average_bitrate = (si->tag_offset - si->header_position) * 8.0
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* si->sample_freq / si->samples;
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return check_streaminfo(si);
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}
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/// Reads replay gain datas
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void streaminfo_gain(mpc_streaminfo* si, const mpc_bits_reader * r_in)
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{
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mpc_bits_reader r = *r_in;
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int version = mpc_bits_read(&r, 8); // gain version
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if (version != 1) // we only know ver 1
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return;
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si->gain_title = (mpc_uint16_t) mpc_bits_read(&r, 16);
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si->peak_title = (mpc_uint16_t) mpc_bits_read(&r, 16);
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si->gain_album = (mpc_uint16_t) mpc_bits_read(&r, 16);
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si->peak_album = (mpc_uint16_t) mpc_bits_read(&r, 16);
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}
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/// Reads streaminfo from SV8 header.
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mpc_status
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streaminfo_read_header_sv8(mpc_streaminfo* si, const mpc_bits_reader * r_in,
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mpc_size_t block_size)
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{
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mpc_uint32_t CRC;
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mpc_bits_reader r = *r_in;
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CRC = (mpc_bits_read(&r, 16) << 16) | mpc_bits_read(&r, 16);
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if (CRC != crc32(r.buff + 1 - (r.count >> 3), (int)block_size - 4))
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return MPC_STATUS_FILE;
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si->stream_version = mpc_bits_read(&r, 8);
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if (si->stream_version != 8)
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return MPC_STATUS_INVALIDSV;
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mpc_bits_get_size(&r, &si->samples);
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mpc_bits_get_size(&r, &si->beg_silence);
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si->is_true_gapless = 1;
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si->sample_freq = samplefreqs[mpc_bits_read(&r, 3)];
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si->max_band = mpc_bits_read(&r, 5) + 1;
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si->channels = mpc_bits_read(&r, 4) + 1;
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si->ms = mpc_bits_read(&r, 1);
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si->block_pwr = mpc_bits_read(&r, 3) * 2;
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si->bitrate = 0;
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if ((si->samples - si->beg_silence) != 0)
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si->average_bitrate = (si->tag_offset - si->header_position) * 8.0
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* si->sample_freq / (si->samples - si->beg_silence);
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return check_streaminfo(si);
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}
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/// Reads encoder informations
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void streaminfo_encoder_info(mpc_streaminfo* si, const mpc_bits_reader * r_in)
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{
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mpc_bits_reader r = *r_in;
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si->profile = mpc_bits_read(&r, 7) / 8.;
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si->profile_name = mpc_get_version_string(si->profile);
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si->pns = mpc_bits_read(&r, 1);
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si->encoder_version = mpc_bits_read(&r, 8) << 24; // major
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si->encoder_version |= mpc_bits_read(&r, 8) << 16; // minor
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si->encoder_version |= mpc_bits_read(&r, 8) << 8; // build
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mpc_get_encoder_string(si);
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}
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double
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mpc_streaminfo_get_length(mpc_streaminfo * si)
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{
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return (double) (si->samples - si->beg_silence) / si->sample_freq;
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}
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mpc_int64_t mpc_streaminfo_get_length_samples(mpc_streaminfo *si)
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{
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return si->samples - si->beg_silence;
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}
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