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FFmpeg/libavcodec/ffv1.c

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  1. /*

  2.  * FFV1 codec for libavcodec

  3.  *

  4.  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This file is part of Libav.

  7.  *

  8.  * Libav is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * Libav is distributed in the hope that it will be useful,

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

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with Libav; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. /**

  24.  * @file

  25.  * FF Video Codec 1 (a lossless codec)

  26.  */

  27. 

  28. #include "libavutil/attributes.h"

  29. #include "libavutil/avassert.h"

  30. #include "avcodec.h"

  31. #include "get_bits.h"

  32. #include "put_bits.h"

  33. #include "rangecoder.h"

  34. #include "golomb.h"

  35. #include "mathops.h"

  36. #include "ffv1.h"

  37. 

  38. const int8_t ffv1_quant5_10bit[256] = {

  39.      0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,

  40.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  41.      1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,

  42.      1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  43.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  44.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  45.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  46.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  47.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  48.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  49.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  50.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  51.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1,

  52.     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

  53.     -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

  54.     -1, -1, -1, -1, -1, -1, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0,

  55. };

  56. 

  57. const int8_t ffv1_quant5[256] = {

  58.      0,  1,  1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  59.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  60.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  61.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  62.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  63.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  64.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  65.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,

  66.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  67.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  68.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  69.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  70.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  71.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  72.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  73.     -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1,

  74. };

  75. 

  76. const int8_t ffv1_quant9_10bit[256] = {

  77.      0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  78.      2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,

  79.      3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,

  80.      3,  3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,  4,  4,  4,  4,

  81.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  82.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  83.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  84.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  85.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  86.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  87.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  88.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  89.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3,

  90.     -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3, -3,

  91.     -3, -3, -3, -3, -3, -3, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2,

  92.     -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0,

  93. };

  94. 

  95. const int8_t ffv1_quant11[256] = {

  96.      0,  1,  2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,

  97.      4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,

  98.      4,  4,  4,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  99.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  100.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  101.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  102.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  103.      5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,

  104.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5,

  105.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5,

  106.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5,

  107.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5,

  108.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5,

  109.     -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -4, -4,

  110.     -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4,

  111.     -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1,

  112. };

  113. 

  114. const uint8_t ffv1_ver2_state[256] = {

  115.       0,  10,  10,  10,  10,  16,  16,  16,  28,  16,  16,  29,  42,  49,  20,  49,

  116.      59,  25,  26,  26,  27,  31,  33,  33,  33,  34,  34,  37,  67,  38,  39,  39,

  117.      40,  40,  41,  79,  43,  44,  45,  45,  48,  48,  64,  50,  51,  52,  88,  52,

  118.      53,  74,  55,  57,  58,  58,  74,  60,  101, 61,  62,  84,  66,  66,  68,  69,

  119.      87,  82,  71,  97,  73,  73,  82,  75,  111, 77,  94,  78,  87,  81,  83,  97,

  120.      85,  83,  94,  86,  99,  89,  90,  99,  111, 92,  93,  134, 95,  98,  105, 98,

  121.     105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125,

  122.     115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129,

  123.     165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148,

  124.     147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160,

  125.     172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178,

  126.     175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196,

  127.     197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214,

  128.     209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225,

  129.     226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242,

  130.     241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,

  131. };

  132. 

  133. 

  134. av_cold int ffv1_common_init(AVCodecContext *avctx)

  135. {

  136.     FFV1Context *s = avctx->priv_data;

  137. 

  138.     s->avctx = avctx;

  139.     s->flags = avctx->flags;

  140. 

  141.     if (!avctx->width || !avctx->height)

  142.         return AVERROR_INVALIDDATA;

  143. 

  144.     s->width  = avctx->width;

  145.     s->height = avctx->height;

  146. 

  147.     // defaults

  148.     s->num_h_slices = 1;

  149.     s->num_v_slices = 1;

  150. 

  151.     return 0;

  152. }

  153. 

  154. int ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)

  155. {

  156.     int j;

  157. 

  158.     fs->plane_count  = f->plane_count;

  159.     fs->transparency = f->transparency;

  160.     for (j = 0; j < f->plane_count; j++) {

  161.         PlaneContext *const p = &fs->plane[j];

  162. 

  163.         if (fs->ac != AC_GOLOMB_RICE) {

  164.             if (!p->state)

  165.                 p->state = av_malloc(CONTEXT_SIZE * p->context_count *

  166.                                      sizeof(uint8_t));

  167.             if (!p->state)

  168.                 return AVERROR(ENOMEM);

  169.         } else {

  170.             if (!p->vlc_state)

  171.                 p->vlc_state = av_malloc(p->context_count * sizeof(VlcState));

  172.             if (!p->vlc_state)

  173.                 return AVERROR(ENOMEM);

  174.         }

  175.     }

  176. 

  177.     if (fs->ac == AC_RANGE_CUSTOM_TAB) {

  178.         //FIXME only redo if state_transition changed

  179.         for (j = 1; j < 256; j++) {

  180.             fs->c.one_state[j]        = f->state_transition[j];

  181.             fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];

  182.         }

  183.     }

  184. 

  185.     return 0;

  186. }

  187. 

  188. av_cold int ffv1_init_slice_contexts(FFV1Context *f)

  189. {

  190.     int i, j;

  191. 

  192.     f->slice_count = f->num_h_slices * f->num_v_slices;

  193.     if (f->slice_count <= 0) {

  194.         av_log(f->avctx, AV_LOG_ERROR, "Invalid number of slices\n");

  195.         return AVERROR(EINVAL);

  196.     }

  197. 

  198.     for (i = 0; i < f->slice_count; i++) {

  199.         int sx          = i % f->num_h_slices;

  200.         int sy          = i / f->num_h_slices;

  201.         int sxs         = f->avctx->width  *  sx      / f->num_h_slices;

  202.         int sxe         = f->avctx->width  * (sx + 1) / f->num_h_slices;

  203.         int sys         = f->avctx->height *  sy      / f->num_v_slices;

  204.         int sye         = f->avctx->height * (sy + 1) / f->num_v_slices;

  205.         FFV1Context *fs = av_mallocz(sizeof(*fs));

  206.         if (!fs)

  207.             goto memfail;

  208. 

  209.         f->slice_context[i] = fs;

  210.         memcpy(fs, f, sizeof(*fs));

  211.         memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2));

  212. 

  213.         fs->slice_width  = sxe - sxs;

  214.         fs->slice_height = sye - sys;

  215.         fs->slice_x      = sxs;

  216.         fs->slice_y      = sys;

  217. 

  218.         fs->sample_buffer = av_malloc(3 * MAX_PLANES * (fs->width + 6) *

  219.                                       sizeof(*fs->sample_buffer));

  220.         if (!fs->sample_buffer) {

  221.             av_free(fs);

  222.             goto memfail;

  223.         }

  224.     }

  225.     return 0;

  226. 

  227. memfail:

  228.     for (j = 0; j < i; j++) {

  229.         av_free(f->slice_context[j]->sample_buffer);

  230.         av_free(f->slice_context[j]);

  231.     }

  232.     return AVERROR(ENOMEM);

  233. }

  234. 

  235. int ffv1_allocate_initial_states(FFV1Context *f)

  236. {

  237.     int i;

  238. 

  239.     for (i = 0; i < f->quant_table_count; i++) {

  240.         f->initial_states[i] = av_malloc(f->context_count[i] *

  241.                                          sizeof(*f->initial_states[i]));

  242.         if (!f->initial_states[i])

  243.             return AVERROR(ENOMEM);

  244.         memset(f->initial_states[i], 128,

  245.                f->context_count[i] * sizeof(*f->initial_states[i]));

  246.     }

  247.     return 0;

  248. }

  249. 

  250. void ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)

  251. {

  252.     int i, j;

  253. 

  254.     for (i = 0; i < f->plane_count; i++) {

  255.         PlaneContext *p = &fs->plane[i];

  256. 

  257.         p->interlace_bit_state[0] = 128;

  258.         p->interlace_bit_state[1] = 128;

  259. 

  260.         if (fs->ac != AC_GOLOMB_RICE) {

  261.             if (f->initial_states[p->quant_table_index]) {

  262.                 memcpy(p->state, f->initial_states[p->quant_table_index],

  263.                        CONTEXT_SIZE * p->context_count);

  264.             } else

  265.                 memset(p->state, 128, CONTEXT_SIZE * p->context_count);

  266.         } else {

  267.             for (j = 0; j < p->context_count; j++) {

  268.                 p->vlc_state[j].drift     = 0;

  269.                 p->vlc_state[j].error_sum = 4;    //FFMAX((RANGE + 32)/64, 2);

  270.                 p->vlc_state[j].bias      = 0;

  271.                 p->vlc_state[j].count     = 1;

  272.             }

  273.         }

  274.     }

  275. }

  276. 

  277. av_cold int ffv1_close(AVCodecContext *avctx)

  278. {

  279.     FFV1Context *s = avctx->priv_data;

  280.     int i, j;

  281. 

  282.     for (j = 0; j < s->slice_count; j++) {

  283.         FFV1Context *fs = s->slice_context[j];

  284.         for (i = 0; i < s->plane_count; i++) {

  285.             PlaneContext *p = &fs->plane[i];

  286. 

  287.             av_freep(&p->state);

  288.             av_freep(&p->vlc_state);

  289.         }

  290.         av_freep(&fs->sample_buffer);

  291.     }

  292. 

  293.     av_freep(&avctx->stats_out);

  294.     for (j = 0; j < s->quant_table_count; j++) {

  295.         av_freep(&s->initial_states[j]);

  296.         for (i = 0; i < s->slice_count; i++) {

  297.             FFV1Context *sf = s->slice_context[i];

  298.             av_freep(&sf->rc_stat2[j]);

  299.         }

  300.         av_freep(&s->rc_stat2[j]);

  301.     }

  302. 

  303.     for (i = 0; i < s->slice_count; i++)

  304.         av_freep(&s->slice_context[i]);

  305. 

  306.     return 0;

  307. }