Tvheadend

/*

 * Copyright (c) 2005 Michael Niedermayer <[email protected]>

 * Copyright (c) 2006 Ryan Martell. ([email protected])

 * Copyright (c) 2010 Andreas Öman

 *

 *  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 3 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include <limits.h>

#include <string.h>

#include <assert.h>

#include "tvhead.h"

/**

 * CRC32 

 */

static uint32_t crc_tab[257] = {

  0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,

  0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,

  0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,

  0x4593e01e, 0x8b27c13c, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,

  0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,

  0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,

  0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,

  0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,

  0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,

  0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,

  0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,

  0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,

  0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,

  0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,

  0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,

  0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,

  0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,

  0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,

  0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,

  0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,

  0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,

  0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,

  0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,

  0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,

  0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,

  0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,

  0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,

  0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,

  0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,

  0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,

  0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,

  0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,

  0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,

  0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,

  0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,

  0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,

  0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,

  0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,

  0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,

  0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,

  0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,

  0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,

  0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4

};

uint32_t

crc32(uint8_t *data, size_t datalen, uint32_t crc)

{

  while(datalen--)

    crc = (crc << 8) ^ crc_tab[((crc >> 25) ^ *data++) & 0xff];

  return crc;

}

/**

 *

 */

static const int sample_rates[16] = {

    96000, 88200, 64000, 48000, 44100, 32000,

    24000, 22050, 16000, 12000, 11025, 8000, 7350

};

/**

 *

 */

int

sri_to_rate(int sri)

{

  return sample_rates[sri & 0xf];

}

/**

 *

 */

int

rate_to_sri(int rate)

{

  int i;

  for(i = 0; i < 16; i++)

    if(sample_rates[i] == rate)

      return i;

  return -1;

}

/**

 *

 */

void

hexdump(const char *pfx, const uint8_t *data, int len)

{

  int i;

  printf("%s: ", pfx);

  for(i = 0; i < len; i++)

    printf("%02x.", data[i]);

  printf("\n");

}

/**

 * @file

 * @brief Base64 encode/decode

 * @author Ryan Martell <[email protected]> (with lots of Michael)

 */

/* ---------------- private code */

static const uint8_t map2[] =

{

    0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,

    0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,

    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,

    0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,

    0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,

    0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,

    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,

    0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,

    0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,

    0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33

};

int 

base64_decode(uint8_t *out, const char *in, int out_size)

{

    int i, v;

    uint8_t *dst = out;

    v = 0;

    for (i = 0; in[i] && in[i] != '='; i++) {

        unsigned int index= in[i]-43;

        if (index >= sizeof(map2) || map2[index] == 0xff)

            return -1;

        v = (v << 6) + map2[index];

        if (i & 3) {

            if (dst - out < out_size) {

                *dst++ = v >> (6 - 2 * (i & 3));

            }

        }

    }

    return dst - out;

}

/**

 *

 */

int

put_utf8(char *out, int c)

{

  if(c == 0xfffe || c == 0xffff || (c >= 0xD800 && c < 0xE000))

    return 0;

  if (c < 0x80) {

    *out = c;

    return 1;

  }

  if(c < 0x800) {

    *out++ = 0xc0 | (0x1f & (c >>  6));

    *out   = 0x80 | (0x3f &  c);

    return 2;

  }

  if(c < 0x10000) {

    *out++ = 0xe0 | (0x0f & (c >> 12));

    *out++ = 0x80 | (0x3f & (c >> 6));

    *out   = 0x80 | (0x3f &  c);

    return 3;

  }

  if(c < 0x200000) {

    *out++ = 0xf0 | (0x07 & (c >> 18));

    *out++ = 0x80 | (0x3f & (c >> 12));

    *out++ = 0x80 | (0x3f & (c >> 6));

    *out   = 0x80 | (0x3f &  c);

    return 4;

  }

  if(c < 0x4000000) {

    *out++ = 0xf8 | (0x03 & (c >> 24));

    *out++ = 0x80 | (0x3f & (c >> 18));

    *out++ = 0x80 | (0x3f & (c >> 12));

    *out++ = 0x80 | (0x3f & (c >>  6));

    *out++ = 0x80 | (0x3f &  c);

    return 5;

  }

  *out++ = 0xfc | (0x01 & (c >> 30));

  *out++ = 0x80 | (0x3f & (c >> 24));

  *out++ = 0x80 | (0x3f & (c >> 18));

  *out++ = 0x80 | (0x3f & (c >> 12));

  *out++ = 0x80 | (0x3f & (c >>  6));

  *out++ = 0x80 | (0x3f &  c);

  return 6;

}

void

sbuf_free(sbuf_t *sb)

{

  if(sb->sb_data)

    free(sb->sb_data);

  sb->sb_size = sb->sb_ptr = sb->sb_err = 0;

  sb->sb_data = NULL;

}

void

sbuf_reset(sbuf_t *sb)

{

  sb->sb_ptr = 0;

  sb->sb_err = 0;

}

void

sbuf_err(sbuf_t *sb)

{

  sb->sb_err = 1;

}

void

sbuf_alloc(sbuf_t *sb, int len)

{

  if(sb->sb_data == NULL) {

    sb->sb_size = 4000;

    sb->sb_data = malloc(sb->sb_size);

  }

  if(sb->sb_ptr + len >= sb->sb_size) {

    sb->sb_size += len * 4;

    sb->sb_data = realloc(sb->sb_data, sb->sb_size);

  }

}

void

sbuf_append(sbuf_t *sb, const uint8_t *data, int len)

{

  sbuf_alloc(sb, len);

  memcpy(sb->sb_data + sb->sb_ptr, data, len);

  sb->sb_ptr += len;

}

void 

sbuf_cut(sbuf_t *sb, int off)

{

  assert(off <= sb->sb_ptr);

  sb->sb_ptr = sb->sb_ptr - off;

  memmove(sb->sb_data, sb->sb_data + off, sb->sb_ptr);

}