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FFmpeg/libavcodec/ffv1dec.c

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  1. /*

  2.  * FFV1 decoder

  3.  *

  4.  * Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg 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.  * FFmpeg 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 FFmpeg; 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) decoder

  26.  */

  27. 

  28. #include "libavutil/avassert.h"

  29. #include "libavutil/crc.h"

  30. #include "libavutil/opt.h"

  31. #include "libavutil/imgutils.h"

  32. #include "libavutil/pixdesc.h"

  33. #include "libavutil/timer.h"

  34. #include "avcodec.h"

  35. #include "internal.h"

  36. #include "get_bits.h"

  37. #include "rangecoder.h"

  38. #include "golomb.h"

  39. #include "mathops.h"

  40. #include "ffv1.h"

  41. 

  42. static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,

  43.                                                int is_signed)

  44. {

  45.     if (get_rac(c, state + 0))

  46.         return 0;

  47.     else {

  48.         int i, e, a;

  49.         e = 0;

  50.         while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10

  51.             e++;

  52.             if (e > 31)

  53.                 return AVERROR_INVALIDDATA;

  54.         }

  55. 

  56.         a = 1;

  57.         for (i = e - 1; i >= 0; i--)

  58.             a += a + get_rac(c, state + 22 + FFMIN(i, 9));  // 22..31

  59. 

  60.         e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21

  61.         return (a ^ e) - e;

  62.     }

  63. }

  64. 

  65. static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)

  66. {

  67.     return get_symbol_inline(c, state, is_signed);

  68. }

  69. 

  70. static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,

  71.                                  int bits)

  72. {

  73.     int k, i, v, ret;

  74. 

  75.     i = state->count;

  76.     k = 0;

  77.     while (i < state->error_sum) { // FIXME: optimize

  78.         k++;

  79.         i += i;

  80.     }

  81. 

  82.     v = get_sr_golomb(gb, k, 12, bits);

  83.     ff_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",

  84.             v, state->bias, state->error_sum, state->drift, state->count, k);

  85. 

  86.     v ^= ((2 * state->drift + state->count) >> 31);

  87. 

  88.     ret = fold(v + state->bias, bits);

  89. 

  90.     update_vlc_state(state, v);

  91. 

  92.     return ret;

  93. }

  94. 

  95. #define TYPE int16_t

  96. #define RENAME(name) name

  97. #include "ffv1dec_template.c"

  98. #undef TYPE

  99. #undef RENAME

  100. 

  101. #define TYPE int32_t

  102. #define RENAME(name) name ## 32

  103. #include "ffv1dec_template.c"

  104. 

  105. static void decode_plane(FFV1Context *s, uint8_t *src,

  106.                          int w, int h, int stride, int plane_index,

  107.                          int pixel_stride)

  108. {

  109.     int x, y;

  110.     int16_t *sample[2];

  111.     sample[0] = s->sample_buffer + 3;

  112.     sample[1] = s->sample_buffer + w + 6 + 3;

  113. 

  114.     s->run_index = 0;

  115. 

  116.     memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));

  117. 

  118.     for (y = 0; y < h; y++) {

  119.         int16_t *temp = sample[0]; // FIXME: try a normal buffer

  120. 

  121.         sample[0] = sample[1];

  122.         sample[1] = temp;

  123. 

  124.         sample[1][-1] = sample[0][0];

  125.         sample[0][w]  = sample[0][w - 1];

  126. 

  127. // { START_TIMER

  128.         if (s->avctx->bits_per_raw_sample <= 8) {

  129.             decode_line(s, w, sample, plane_index, 8);

  130.             for (x = 0; x < w; x++)

  131.                 src[x*pixel_stride + stride * y] = sample[1][x];

  132.         } else {

  133.             decode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);

  134.             if (s->packed_at_lsb) {

  135.                 for (x = 0; x < w; x++) {

  136.                     ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];

  137.                 }

  138.             } else {

  139.                 for (x = 0; x < w; x++) {

  140.                     ((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x] << (16 - s->avctx->bits_per_raw_sample) | ((uint16_t **)sample)[1][x] >> (2 * s->avctx->bits_per_raw_sample - 16);

  141.                 }

  142.             }

  143.         }

  144. // STOP_TIMER("decode-line") }

  145.     }

  146. }

  147. 

  148. static int decode_slice_header(FFV1Context *f, FFV1Context *fs)

  149. {

  150.     RangeCoder *c = &fs->c;

  151.     uint8_t state[CONTEXT_SIZE];

  152.     unsigned ps, i, context_count;

  153.     memset(state, 128, sizeof(state));

  154. 

  155.     av_assert0(f->version > 2);

  156. 

  157.     fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;

  158.     fs->slice_y      =  get_symbol(c, state, 0)      * f->height;

  159.     fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;

  160.     fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;

  161. 

  162.     fs->slice_x /= f->num_h_slices;

  163.     fs->slice_y /= f->num_v_slices;

  164.     fs->slice_width  = fs->slice_width /f->num_h_slices - fs->slice_x;

  165.     fs->slice_height = fs->slice_height/f->num_v_slices - fs->slice_y;

  166.     if ((unsigned)fs->slice_width > f->width || (unsigned)fs->slice_height > f->height)

  167.         return -1;

  168.     if (    (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  169.          || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  170.         return -1;

  171. 

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

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

  174.         int idx = get_symbol(c, state, 0);

  175.         if (idx >= (unsigned)f->quant_table_count) {

  176.             av_log(f->avctx, AV_LOG_ERROR, "quant_table_index out of range\n");

  177.             return -1;

  178.         }

  179.         p->quant_table_index = idx;

  180.         memcpy(p->quant_table, f->quant_tables[idx], sizeof(p->quant_table));

  181.         context_count = f->context_count[idx];

  182. 

  183.         if (p->context_count < context_count) {

  184.             av_freep(&p->state);

  185.             av_freep(&p->vlc_state);

  186.         }

  187.         p->context_count = context_count;

  188.     }

  189. 

  190.     ps = get_symbol(c, state, 0);

  191.     if (ps == 1) {

  192.         f->cur->interlaced_frame = 1;

  193.         f->cur->top_field_first  = 1;

  194.     } else if (ps == 2) {

  195.         f->cur->interlaced_frame = 1;

  196.         f->cur->top_field_first  = 0;

  197.     } else if (ps == 3) {

  198.         f->cur->interlaced_frame = 0;

  199.     }

  200.     f->cur->sample_aspect_ratio.num = get_symbol(c, state, 0);

  201.     f->cur->sample_aspect_ratio.den = get_symbol(c, state, 0);

  202. 

  203.     if (av_image_check_sar(f->width, f->height,

  204.                            f->cur->sample_aspect_ratio) < 0) {

  205.         av_log(f->avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",

  206.                f->cur->sample_aspect_ratio.num,

  207.                f->cur->sample_aspect_ratio.den);

  208.         f->cur->sample_aspect_ratio = (AVRational){ 0, 1 };

  209.     }

  210. 

  211.     if (fs->version > 3) {

  212.         fs->slice_reset_contexts = get_rac(c, state);

  213.         fs->slice_coding_mode = get_symbol(c, state, 0);

  214.         if (fs->slice_coding_mode != 1) {

  215.             fs->slice_rct_by_coef = get_symbol(c, state, 0);

  216.             fs->slice_rct_ry_coef = get_symbol(c, state, 0);

  217.             if ((uint64_t)fs->slice_rct_by_coef + (uint64_t)fs->slice_rct_ry_coef > 4) {

  218.                 av_log(f->avctx, AV_LOG_ERROR, "slice_rct_y_coef out of range\n");

  219.                 return AVERROR_INVALIDDATA;

  220.             }

  221.         }

  222.     }

  223. 

  224.     return 0;

  225. }

  226. 

  227. static int decode_slice(AVCodecContext *c, void *arg)

  228. {

  229.     FFV1Context *fs   = *(void **)arg;

  230.     FFV1Context *f    = fs->avctx->priv_data;

  231.     int width, height, x, y, ret;

  232.     const int ps      = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;

  233.     AVFrame * const p = f->cur;

  234.     int i, si;

  235. 

  236.     for( si=0; fs != f->slice_context[si]; si ++)

  237.         ;

  238. 

  239.     if(f->fsrc && !p->key_frame)

  240.         ff_thread_await_progress(&f->last_picture, si, 0);

  241. 

  242.     if(f->fsrc && !p->key_frame) {

  243.         FFV1Context *fssrc = f->fsrc->slice_context[si];

  244.         FFV1Context *fsdst = f->slice_context[si];

  245.         av_assert1(fsdst->plane_count == fssrc->plane_count);

  246.         av_assert1(fsdst == fs);

  247. 

  248.         if (!p->key_frame)

  249.             fsdst->slice_damaged |= fssrc->slice_damaged;

  250. 

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

  252.             PlaneContext *psrc = &fssrc->plane[i];

  253.             PlaneContext *pdst = &fsdst->plane[i];

  254. 

  255.             av_free(pdst->state);

  256.             av_free(pdst->vlc_state);

  257.             memcpy(pdst, psrc, sizeof(*pdst));

  258.             pdst->state = NULL;

  259.             pdst->vlc_state = NULL;

  260. 

  261.             if (fssrc->ac) {

  262.                 pdst->state = av_malloc_array(CONTEXT_SIZE,  psrc->context_count);

  263.                 memcpy(pdst->state, psrc->state, CONTEXT_SIZE * psrc->context_count);

  264.             } else {

  265.                 pdst->vlc_state = av_malloc_array(sizeof(*pdst->vlc_state), psrc->context_count);

  266.                 memcpy(pdst->vlc_state, psrc->vlc_state, sizeof(*pdst->vlc_state) * psrc->context_count);

  267.             }

  268.         }

  269.     }

  270. 

  271.     fs->slice_rct_by_coef = 1;

  272.     fs->slice_rct_ry_coef = 1;

  273. 

  274.     if (f->version > 2) {

  275.         if (ff_ffv1_init_slice_state(f, fs) < 0)

  276.             return AVERROR(ENOMEM);

  277.         if (decode_slice_header(f, fs) < 0) {

  278.             fs->slice_x = fs->slice_y = fs->slice_height = fs->slice_width = 0;

  279.             fs->slice_damaged = 1;

  280.             return AVERROR_INVALIDDATA;

  281.         }

  282.     }

  283.     if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0)

  284.         return ret;

  285.     if (f->cur->key_frame || fs->slice_reset_contexts)

  286.         ff_ffv1_clear_slice_state(f, fs);

  287. 

  288.     width  = fs->slice_width;

  289.     height = fs->slice_height;

  290.     x      = fs->slice_x;

  291.     y      = fs->slice_y;

  292. 

  293.     if (fs->ac == AC_GOLOMB_RICE) {

  294.         if (f->version == 3 && f->micro_version > 1 || f->version > 3)

  295.             get_rac(&fs->c, (uint8_t[]) { 129 });

  296.         fs->ac_byte_count = f->version > 2 || (!x && !y) ? fs->c.bytestream - fs->c.bytestream_start - 1 : 0;

  297.         init_get_bits(&fs->gb,

  298.                       fs->c.bytestream_start + fs->ac_byte_count,

  299.                       (fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count) * 8);

  300.     }

  301. 

  302.     av_assert1(width && height);

  303.     if (f->colorspace == 0 && (f->chroma_planes || !fs->transparency)) {

  304.         const int chroma_width  = AV_CEIL_RSHIFT(width,  f->chroma_h_shift);

  305.         const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);

  306.         const int cx            = x >> f->chroma_h_shift;

  307.         const int cy            = y >> f->chroma_v_shift;

  308.         decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);

  309. 

  310.         if (f->chroma_planes) {

  311.             decode_plane(fs, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);

  312.             decode_plane(fs, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1);

  313.         }

  314.         if (fs->transparency)

  315.             decode_plane(fs, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1);

  316.     } else if (f->colorspace == 0) {

  317.          decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0]    , width, height, p->linesize[0], 0, 2);

  318.          decode_plane(fs, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2);

  319.     } else if (f->use32bit) {

  320.         uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],

  321.                                p->data[1] + ps * x + y * p->linesize[1],

  322.                                p->data[2] + ps * x + y * p->linesize[2] };

  323.         decode_rgb_frame32(fs, planes, width, height, p->linesize);

  324.     } else {

  325.         uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],

  326.                                p->data[1] + ps * x + y * p->linesize[1],

  327.                                p->data[2] + ps * x + y * p->linesize[2] };

  328.         decode_rgb_frame(fs, planes, width, height, p->linesize);

  329.     }

  330.     if (fs->ac != AC_GOLOMB_RICE && f->version > 2) {

  331.         int v;

  332.         get_rac(&fs->c, (uint8_t[]) { 129 });

  333.         v = fs->c.bytestream_end - fs->c.bytestream - 2 - 5*f->ec;

  334.         if (v) {

  335.             av_log(f->avctx, AV_LOG_ERROR, "bytestream end mismatching by %d\n", v);

  336.             fs->slice_damaged = 1;

  337.         }

  338.     }

  339. 

  340.     emms_c();

  341. 

  342.     ff_thread_report_progress(&f->picture, si, 0);

  343. 

  344.     return 0;

  345. }

  346. 

  347. static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)

  348. {

  349.     int v;

  350.     int i = 0;

  351.     uint8_t state[CONTEXT_SIZE];

  352. 

  353.     memset(state, 128, sizeof(state));

  354. 

  355.     for (v = 0; i < 128; v++) {

  356.         unsigned len = get_symbol(c, state, 0) + 1;

  357. 

  358.         if (len > 128 - i || !len)

  359.             return AVERROR_INVALIDDATA;

  360. 

  361.         while (len--) {

  362.             quant_table[i] = scale * v;

  363.             i++;

  364.         }

  365.     }

  366. 

  367.     for (i = 1; i < 128; i++)

  368.         quant_table[256 - i] = -quant_table[i];

  369.     quant_table[128] = -quant_table[127];

  370. 

  371.     return 2 * v - 1;

  372. }

  373. 

  374. static int read_quant_tables(RangeCoder *c,

  375.                              int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  376. {

  377.     int i;

  378.     int context_count = 1;

  379. 

  380.     for (i = 0; i < 5; i++) {

  381.         int ret = read_quant_table(c, quant_table[i], context_count);

  382.         if (ret < 0)

  383.             return ret;

  384.         context_count *= ret;

  385.         if (context_count > 32768U) {

  386.             return AVERROR_INVALIDDATA;

  387.         }

  388.     }

  389.     return (context_count + 1) / 2;

  390. }

  391. 

  392. static int read_extra_header(FFV1Context *f)

  393. {

  394.     RangeCoder *const c = &f->c;

  395.     uint8_t state[CONTEXT_SIZE];

  396.     int i, j, k, ret;

  397.     uint8_t state2[32][CONTEXT_SIZE];

  398.     unsigned crc = 0;

  399. 

  400.     memset(state2, 128, sizeof(state2));

  401.     memset(state, 128, sizeof(state));

  402. 

  403.     ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);

  404.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  405. 

  406.     f->version = get_symbol(c, state, 0);

  407.     if (f->version < 2) {

  408.         av_log(f->avctx, AV_LOG_ERROR, "Invalid version in global header\n");

  409.         return AVERROR_INVALIDDATA;

  410.     }

  411.     if (f->version > 2) {

  412.         c->bytestream_end -= 4;

  413.         f->micro_version = get_symbol(c, state, 0);

  414.         if (f->micro_version < 0)

  415.             return AVERROR_INVALIDDATA;

  416.     }

  417.     f->ac = get_symbol(c, state, 0);

  418. 

  419.     if (f->ac == AC_RANGE_CUSTOM_TAB) {

  420.         for (i = 1; i < 256; i++)

  421.             f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];

  422.     }

  423. 

  424.     f->colorspace                 = get_symbol(c, state, 0); //YUV cs type

  425.     f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);

  426.     f->chroma_planes              = get_rac(c, state);

  427.     f->chroma_h_shift             = get_symbol(c, state, 0);

  428.     f->chroma_v_shift             = get_symbol(c, state, 0);

  429.     f->transparency               = get_rac(c, state);

  430.     f->plane_count                = 1 + (f->chroma_planes || f->version<4) + f->transparency;

  431.     f->num_h_slices               = 1 + get_symbol(c, state, 0);

  432.     f->num_v_slices               = 1 + get_symbol(c, state, 0);

  433. 

  434.     if (f->chroma_h_shift > 4U || f->chroma_v_shift > 4U) {

  435.         av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",

  436.                f->chroma_h_shift, f->chroma_v_shift);

  437.         return AVERROR_INVALIDDATA;

  438.     }

  439. 

  440.     if (f->num_h_slices > (unsigned)f->width  || !f->num_h_slices ||

  441.         f->num_v_slices > (unsigned)f->height || !f->num_v_slices

  442.        ) {

  443.         av_log(f->avctx, AV_LOG_ERROR, "slice count invalid\n");

  444.         return AVERROR_INVALIDDATA;

  445.     }

  446. 

  447.     f->quant_table_count = get_symbol(c, state, 0);

  448.     if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES || !f->quant_table_count) {

  449.         av_log(f->avctx, AV_LOG_ERROR, "quant table count %d is invalid\n", f->quant_table_count);

  450.         f->quant_table_count = 0;

  451.         return AVERROR_INVALIDDATA;

  452.     }

  453. 

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

  455.         f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);

  456.         if (f->context_count[i] < 0) {

  457.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  458.             return AVERROR_INVALIDDATA;

  459.         }

  460.     }

  461.     if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)

  462.         return ret;

  463. 

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

  465.         if (get_rac(c, state)) {

  466.             for (j = 0; j < f->context_count[i]; j++)

  467.                 for (k = 0; k < CONTEXT_SIZE; k++) {

  468.                     int pred = j ? f->initial_states[i][j - 1][k] : 128;

  469.                     f->initial_states[i][j][k] =

  470.                         (pred + get_symbol(c, state2[k], 1)) & 0xFF;

  471.                 }

  472.         }

  473. 

  474.     if (f->version > 2) {

  475.         f->ec = get_symbol(c, state, 0);

  476.         if (f->micro_version > 2)

  477.             f->intra = get_symbol(c, state, 0);

  478.     }

  479. 

  480.     if (f->version > 2) {

  481.         unsigned v;

  482.         v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,

  483.                    f->avctx->extradata, f->avctx->extradata_size);

  484.         if (v || f->avctx->extradata_size < 4) {

  485.             av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", v);

  486.             return AVERROR_INVALIDDATA;

  487.         }

  488.         crc = AV_RB32(f->avctx->extradata + f->avctx->extradata_size - 4);

  489.     }

  490. 

  491.     if (f->avctx->debug & FF_DEBUG_PICT_INFO)

  492.         av_log(f->avctx, AV_LOG_DEBUG,

  493.                "global: ver:%d.%d, coder:%d, colorspace: %d bpr:%d chroma:%d(%d:%d), alpha:%d slices:%dx%d qtabs:%d ec:%d intra:%d CRC:0x%08X\n",

  494.                f->version, f->micro_version,

  495.                f->ac,

  496.                f->colorspace,

  497.                f->avctx->bits_per_raw_sample,

  498.                f->chroma_planes, f->chroma_h_shift, f->chroma_v_shift,

  499.                f->transparency,

  500.                f->num_h_slices, f->num_v_slices,

  501.                f->quant_table_count,

  502.                f->ec,

  503.                f->intra,

  504.                crc

  505.               );

  506.     return 0;

  507. }

  508. 

  509. static int read_header(FFV1Context *f)

  510. {

  511.     uint8_t state[CONTEXT_SIZE];

  512.     int i, j, context_count = -1; //-1 to avoid warning

  513.     RangeCoder *const c = &f->slice_context[0]->c;

  514. 

  515.     memset(state, 128, sizeof(state));

  516. 

  517.     if (f->version < 2) {

  518.         int chroma_planes, chroma_h_shift, chroma_v_shift, transparency, colorspace, bits_per_raw_sample;

  519.         unsigned v= get_symbol(c, state, 0);

  520.         if (v >= 2) {

  521.             av_log(f->avctx, AV_LOG_ERROR, "invalid version %d in ver01 header\n", v);

  522.             return AVERROR_INVALIDDATA;

  523.         }

  524.         f->version = v;

  525.         f->ac = get_symbol(c, state, 0);

  526. 

  527.         if (f->ac == AC_RANGE_CUSTOM_TAB) {

  528.             for (i = 1; i < 256; i++)

  529.                 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];

  530.         }

  531. 

  532.         colorspace          = get_symbol(c, state, 0); //YUV cs type

  533.         bits_per_raw_sample = f->version > 0 ? get_symbol(c, state, 0) : f->avctx->bits_per_raw_sample;

  534.         chroma_planes       = get_rac(c, state);

  535.         chroma_h_shift      = get_symbol(c, state, 0);

  536.         chroma_v_shift      = get_symbol(c, state, 0);

  537.         transparency        = get_rac(c, state);

  538.         if (colorspace == 0 && f->avctx->skip_alpha)

  539.             transparency = 0;

  540. 

  541.         if (f->plane_count) {

  542.             if (colorspace          != f->colorspace                 ||

  543.                 bits_per_raw_sample != f->avctx->bits_per_raw_sample ||

  544.                 chroma_planes       != f->chroma_planes              ||

  545.                 chroma_h_shift      != f->chroma_h_shift             ||

  546.                 chroma_v_shift      != f->chroma_v_shift             ||

  547.                 transparency        != f->transparency) {

  548.                 av_log(f->avctx, AV_LOG_ERROR, "Invalid change of global parameters\n");

  549.                 return AVERROR_INVALIDDATA;

  550.             }

  551.         }

  552. 

  553.         if (chroma_h_shift > 4U || chroma_v_shift > 4U) {

  554.             av_log(f->avctx, AV_LOG_ERROR, "chroma shift parameters %d %d are invalid\n",

  555.                    chroma_h_shift, chroma_v_shift);

  556.             return AVERROR_INVALIDDATA;

  557.         }

  558. 

  559.         f->colorspace                 = colorspace;

  560.         f->avctx->bits_per_raw_sample = bits_per_raw_sample;

  561.         f->chroma_planes              = chroma_planes;

  562.         f->chroma_h_shift             = chroma_h_shift;

  563.         f->chroma_v_shift             = chroma_v_shift;

  564.         f->transparency               = transparency;

  565. 

  566.         f->plane_count    = 2 + f->transparency;

  567.     }

  568. 

  569.     if (f->colorspace == 0) {

  570.         if (!f->transparency && !f->chroma_planes) {

  571.             if (f->avctx->bits_per_raw_sample <= 8)

  572.                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;

  573.             else if (f->avctx->bits_per_raw_sample == 10) {

  574.                 f->packed_at_lsb = 1;

  575.                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;

  576.             } else if (f->avctx->bits_per_raw_sample == 12) {

  577.                 f->packed_at_lsb = 1;

  578.                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;

  579.             } else if (f->avctx->bits_per_raw_sample == 16) {

  580.                 f->packed_at_lsb = 1;

  581.                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;

  582.             } else if (f->avctx->bits_per_raw_sample < 16) {

  583.                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;

  584.             } else

  585.                 return AVERROR(ENOSYS);

  586.         } else if (f->transparency && !f->chroma_planes) {

  587.             if (f->avctx->bits_per_raw_sample <= 8)

  588.                 f->avctx->pix_fmt = AV_PIX_FMT_YA8;

  589.             else

  590.                 return AVERROR(ENOSYS);

  591.         } else if (f->avctx->bits_per_raw_sample<=8 && !f->transparency) {

  592.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  593.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P; break;

  594.             case 0x01: f->avctx->pix_fmt = AV_PIX_FMT_YUV440P; break;

  595.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P; break;

  596.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P; break;

  597.             case 0x20: f->avctx->pix_fmt = AV_PIX_FMT_YUV411P; break;

  598.             case 0x22: f->avctx->pix_fmt = AV_PIX_FMT_YUV410P; break;

  599.             }

  600.         } else if (f->avctx->bits_per_raw_sample <= 8 && f->transparency) {

  601.             switch(16*f->chroma_h_shift + f->chroma_v_shift) {

  602.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P; break;

  603.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P; break;

  604.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P; break;

  605.             }

  606.         } else if (f->avctx->bits_per_raw_sample == 9 && !f->transparency) {

  607.             f->packed_at_lsb = 1;

  608.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  609.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P9; break;

  610.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P9; break;

  611.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P9; break;

  612.             }

  613.         } else if (f->avctx->bits_per_raw_sample == 9 && f->transparency) {

  614.             f->packed_at_lsb = 1;

  615.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  616.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P9; break;

  617.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P9; break;

  618.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P9; break;

  619.             }

  620.         } else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency) {

  621.             f->packed_at_lsb = 1;

  622.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  623.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P10; break;

  624.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P10; break;

  625.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P10; break;

  626.             }

  627.         } else if (f->avctx->bits_per_raw_sample == 10 && f->transparency) {

  628.             f->packed_at_lsb = 1;

  629.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  630.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P10; break;

  631.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P10; break;

  632.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P10; break;

  633.             }

  634.         } else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency) {

  635.             f->packed_at_lsb = 1;

  636.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  637.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P12; break;

  638.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P12; break;

  639.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P12; break;

  640.             }

  641.         } else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency){

  642.             f->packed_at_lsb = 1;

  643.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  644.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16; break;

  645.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16; break;

  646.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16; break;

  647.             }

  648.         } else if (f->avctx->bits_per_raw_sample == 16 && f->transparency){

  649.             f->packed_at_lsb = 1;

  650.             switch(16 * f->chroma_h_shift + f->chroma_v_shift) {

  651.             case 0x00: f->avctx->pix_fmt = AV_PIX_FMT_YUVA444P16; break;

  652.             case 0x10: f->avctx->pix_fmt = AV_PIX_FMT_YUVA422P16; break;

  653.             case 0x11: f->avctx->pix_fmt = AV_PIX_FMT_YUVA420P16; break;

  654.             }

  655.         }

  656.     } else if (f->colorspace == 1) {

  657.         if (f->chroma_h_shift || f->chroma_v_shift) {

  658.             av_log(f->avctx, AV_LOG_ERROR,

  659.                    "chroma subsampling not supported in this colorspace\n");

  660.             return AVERROR(ENOSYS);

  661.         }

  662.         if (     f->avctx->bits_per_raw_sample <=  8 && !f->transparency)

  663.             f->avctx->pix_fmt = AV_PIX_FMT_0RGB32;

  664.         else if (f->avctx->bits_per_raw_sample <=  8 && f->transparency)

  665.             f->avctx->pix_fmt = AV_PIX_FMT_RGB32;

  666.         else if (f->avctx->bits_per_raw_sample ==  9 && !f->transparency)

  667.             f->avctx->pix_fmt = AV_PIX_FMT_GBRP9;

  668.         else if (f->avctx->bits_per_raw_sample == 10 && !f->transparency)

  669.             f->avctx->pix_fmt = AV_PIX_FMT_GBRP10;

  670.         else if (f->avctx->bits_per_raw_sample == 12 && !f->transparency)

  671.             f->avctx->pix_fmt = AV_PIX_FMT_GBRP12;

  672.         else if (f->avctx->bits_per_raw_sample == 14 && !f->transparency)

  673.             f->avctx->pix_fmt = AV_PIX_FMT_GBRP14;

  674.         else if (f->avctx->bits_per_raw_sample == 16 && !f->transparency) {

  675.             f->avctx->pix_fmt = AV_PIX_FMT_GBRP16;

  676.             f->use32bit = 1;

  677.         }

  678.     } else {

  679.         av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");

  680.         return AVERROR(ENOSYS);

  681.     }

  682.     if (f->avctx->pix_fmt == AV_PIX_FMT_NONE) {

  683.         av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");

  684.         return AVERROR(ENOSYS);

  685.     }

  686. 

  687.     ff_dlog(f->avctx, "%d %d %d\n",

  688.             f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);

  689.     if (f->version < 2) {

  690.         context_count = read_quant_tables(c, f->quant_table);

  691.         if (context_count < 0) {

  692.             av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");

  693.             return AVERROR_INVALIDDATA;

  694.         }

  695.         f->slice_count = f->max_slice_count;

  696.     } else if (f->version < 3) {

  697.         f->slice_count = get_symbol(c, state, 0);

  698.     } else {

  699.         const uint8_t *p = c->bytestream_end;

  700.         for (f->slice_count = 0;

  701.              f->slice_count < MAX_SLICES && 3 < p - c->bytestream_start;

  702.              f->slice_count++) {

  703.             int trailer = 3 + 5*!!f->ec;

  704.             int size = AV_RB24(p-trailer);

  705.             if (size + trailer > p - c->bytestream_start)

  706.                 break;

  707.             p -= size + trailer;

  708.         }

  709.     }

  710.     if (f->slice_count > (unsigned)MAX_SLICES || f->slice_count <= 0 || f->slice_count > f->max_slice_count) {

  711.         av_log(f->avctx, AV_LOG_ERROR, "slice count %d is invalid (max=%d)\n", f->slice_count, f->max_slice_count);

  712.         return AVERROR_INVALIDDATA;

  713.     }

  714. 

  715.     for (j = 0; j < f->slice_count; j++) {

  716.         FFV1Context *fs = f->slice_context[j];

  717.         fs->ac            = f->ac;

  718.         fs->packed_at_lsb = f->packed_at_lsb;

  719. 

  720.         fs->slice_damaged = 0;

  721. 

  722.         if (f->version == 2) {

  723.             fs->slice_x      =  get_symbol(c, state, 0)      * f->width ;

  724.             fs->slice_y      =  get_symbol(c, state, 0)      * f->height;

  725.             fs->slice_width  = (get_symbol(c, state, 0) + 1) * f->width  + fs->slice_x;

  726.             fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;

  727. 

  728.             fs->slice_x     /= f->num_h_slices;

  729.             fs->slice_y     /= f->num_v_slices;

  730.             fs->slice_width  = fs->slice_width  / f->num_h_slices - fs->slice_x;

  731.             fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;

  732.             if ((unsigned)fs->slice_width  > f->width ||

  733.                 (unsigned)fs->slice_height > f->height)

  734.                 return AVERROR_INVALIDDATA;

  735.             if (   (unsigned)fs->slice_x + (uint64_t)fs->slice_width  > f->width

  736.                 || (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)

  737.                 return AVERROR_INVALIDDATA;

  738.         }

  739. 

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

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

  742. 

  743.             if (f->version == 2) {

  744.                 int idx = get_symbol(c, state, 0);

  745.                 if (idx > (unsigned)f->quant_table_count) {

  746.                     av_log(f->avctx, AV_LOG_ERROR,

  747.                            "quant_table_index out of range\n");

  748.                     return AVERROR_INVALIDDATA;

  749.                 }

  750.                 p->quant_table_index = idx;

  751.                 memcpy(p->quant_table, f->quant_tables[idx],

  752.                        sizeof(p->quant_table));

  753.                 context_count = f->context_count[idx];

  754.             } else {

  755.                 memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));

  756.             }

  757. 

  758.             if (f->version <= 2) {

  759.                 av_assert0(context_count >= 0);

  760.                 if (p->context_count < context_count) {

  761.                     av_freep(&p->state);

  762.                     av_freep(&p->vlc_state);

  763.                 }

  764.                 p->context_count = context_count;

  765.             }

  766.         }

  767.     }

  768.     return 0;

  769. }

  770. 

  771. static av_cold int decode_init(AVCodecContext *avctx)

  772. {

  773.     FFV1Context *f = avctx->priv_data;

  774.     int ret;

  775. 

  776.     if ((ret = ff_ffv1_common_init(avctx)) < 0)

  777.         return ret;

  778. 

  779.     if (avctx->extradata_size > 0 && (ret = read_extra_header(f)) < 0)

  780.         return ret;

  781. 

  782.     if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)

  783.         return ret;

  784. 

  785.     avctx->internal->allocate_progress = 1;

  786. 

  787.     return 0;

  788. }

  789. 

  790. static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

  791. {

  792.     uint8_t *buf        = avpkt->data;

  793.     int buf_size        = avpkt->size;

  794.     FFV1Context *f      = avctx->priv_data;

  795.     RangeCoder *const c = &f->slice_context[0]->c;

  796.     int i, ret;

  797.     uint8_t keystate = 128;

  798.     uint8_t *buf_p;

  799.     AVFrame *p;

  800. 

  801.     if (f->last_picture.f)

  802.         ff_thread_release_buffer(avctx, &f->last_picture);

  803.     FFSWAP(ThreadFrame, f->picture, f->last_picture);

  804. 

  805.     f->cur = p = f->picture.f;

  806. 

  807.     if (f->version < 3 && avctx->field_order > AV_FIELD_PROGRESSIVE) {

  808.         /* we have interlaced material flagged in container */

  809.         p->interlaced_frame = 1;

  810.         if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)

  811.             p->top_field_first = 1;

  812.     }

  813. 

  814.     f->avctx = avctx;

  815.     ff_init_range_decoder(c, buf, buf_size);

  816.     ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);

  817. 

  818.     p->pict_type = AV_PICTURE_TYPE_I; //FIXME I vs. P

  819.     if (get_rac(c, &keystate)) {

  820.         p->key_frame    = 1;

  821.         f->key_frame_ok = 0;

  822.         if ((ret = read_header(f)) < 0)

  823.             return ret;

  824.         f->key_frame_ok = 1;

  825.     } else {

  826.         if (!f->key_frame_ok) {

  827.             av_log(avctx, AV_LOG_ERROR,

  828.                    "Cannot decode non-keyframe without valid keyframe\n");

  829.             return AVERROR_INVALIDDATA;

  830.         }

  831.         p->key_frame = 0;

  832.     }

  833. 

  834.     if ((ret = ff_thread_get_buffer(avctx, &f->picture, AV_GET_BUFFER_FLAG_REF)) < 0)

  835.         return ret;

  836. 

  837.     if (avctx->debug & FF_DEBUG_PICT_INFO)

  838.         av_log(avctx, AV_LOG_DEBUG, "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",

  839.                f->version, p->key_frame, f->ac, f->ec, f->slice_count, f->avctx->bits_per_raw_sample);

  840. 

  841.     ff_thread_finish_setup(avctx);

  842. 

  843.     buf_p = buf + buf_size;

  844.     for (i = f->slice_count - 1; i >= 0; i--) {

  845.         FFV1Context *fs = f->slice_context[i];

  846.         int trailer = 3 + 5*!!f->ec;

  847.         int v;

  848. 

  849.         if (i || f->version > 2) v = AV_RB24(buf_p-trailer) + trailer;

  850.         else                     v = buf_p - c->bytestream_start;

  851.         if (buf_p - c->bytestream_start < v) {

  852.             av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");

  853.             ff_thread_report_progress(&f->picture, INT_MAX, 0);

  854.             return AVERROR_INVALIDDATA;

  855.         }

  856.         buf_p -= v;

  857. 

  858.         if (f->ec) {

  859.             unsigned crc = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, v);

  860.             if (crc) {

  861.                 int64_t ts = avpkt->pts != AV_NOPTS_VALUE ? avpkt->pts : avpkt->dts;

  862.                 av_log(f->avctx, AV_LOG_ERROR, "CRC mismatch %X!", crc);

  863.                 if (ts != AV_NOPTS_VALUE && avctx->pkt_timebase.num) {

  864.                     av_log(f->avctx, AV_LOG_ERROR, "at %f seconds\n", ts*av_q2d(avctx->pkt_timebase));

  865.                 } else if (ts != AV_NOPTS_VALUE) {

  866.                     av_log(f->avctx, AV_LOG_ERROR, "at %"PRId64"\n", ts);

  867.                 } else {

  868.                     av_log(f->avctx, AV_LOG_ERROR, "\n");

  869.                 }

  870.                 fs->slice_damaged = 1;

  871.             }

  872.             if (avctx->debug & FF_DEBUG_PICT_INFO) {

  873.                 av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08X\n", i, AV_RB32(buf_p + v - 4));

  874.             }

  875.         }

  876. 

  877.         if (i) {

  878.             ff_init_range_decoder(&fs->c, buf_p, v);

  879.         } else

  880.             fs->c.bytestream_end = buf_p + v;

  881. 

  882.         fs->avctx = avctx;

  883.         fs->cur = p;

  884.     }

  885. 

  886.     avctx->execute(avctx,

  887.                    decode_slice,

  888.                    &f->slice_context[0],

  889.                    NULL,

  890.                    f->slice_count,

  891.                    sizeof(void*));

  892. 

  893.     for (i = f->slice_count - 1; i >= 0; i--) {

  894.         FFV1Context *fs = f->slice_context[i];

  895.         int j;

  896.         if (fs->slice_damaged && f->last_picture.f->data[0]) {

  897.             const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);

  898.             const uint8_t *src[4];

  899.             uint8_t *dst[4];

  900.             ff_thread_await_progress(&f->last_picture, INT_MAX, 0);

  901.             for (j = 0; j < 4; j++) {

  902.                 int pixshift = desc->comp[j].depth > 8;

  903.                 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;

  904.                 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;

  905.                 dst[j] = p->data[j] + p->linesize[j] *

  906.                          (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);

  907.                 src[j] = f->last_picture.f->data[j] + f->last_picture.f->linesize[j] *

  908.                          (fs->slice_y >> sv) + ((fs->slice_x >> sh) << pixshift);

  909.             }

  910.             av_image_copy(dst, p->linesize, src,

  911.                           f->last_picture.f->linesize,

  912.                           avctx->pix_fmt,

  913.                           fs->slice_width,

  914.                           fs->slice_height);

  915.         }

  916.     }

  917.     ff_thread_report_progress(&f->picture, INT_MAX, 0);

  918. 

  919.     f->picture_number++;

  920. 

  921.     if (f->last_picture.f)

  922.         ff_thread_release_buffer(avctx, &f->last_picture);

  923.     f->cur = NULL;

  924.     if ((ret = av_frame_ref(data, f->picture.f)) < 0)

  925.         return ret;

  926. 

  927.     *got_frame = 1;

  928. 

  929.     return buf_size;

  930. }

  931. 

  932. #if HAVE_THREADS

  933. static int init_thread_copy(AVCodecContext *avctx)

  934. {

  935.     FFV1Context *f = avctx->priv_data;

  936.     int i, ret;

  937. 

  938.     f->picture.f      = NULL;

  939.     f->last_picture.f = NULL;

  940.     f->sample_buffer  = NULL;

  941.     f->max_slice_count = 0;

  942.     f->slice_count = 0;

  943. 

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

  945.         av_assert0(f->version > 1);

  946.         f->initial_states[i] = av_memdup(f->initial_states[i],

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

  948.     }

  949. 

  950.     f->picture.f      = av_frame_alloc();

  951.     f->last_picture.f = av_frame_alloc();

  952. 

  953.     if ((ret = ff_ffv1_init_slice_contexts(f)) < 0)

  954.         return ret;

  955. 

  956.     return 0;

  957. }

  958. #endif

  959. 

  960. static void copy_fields(FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)

  961. {

  962.     fsdst->version             = fsrc->version;

  963.     fsdst->micro_version       = fsrc->micro_version;

  964.     fsdst->chroma_planes       = fsrc->chroma_planes;

  965.     fsdst->chroma_h_shift      = fsrc->chroma_h_shift;

  966.     fsdst->chroma_v_shift      = fsrc->chroma_v_shift;

  967.     fsdst->transparency        = fsrc->transparency;

  968.     fsdst->plane_count         = fsrc->plane_count;

  969.     fsdst->ac                  = fsrc->ac;

  970.     fsdst->colorspace          = fsrc->colorspace;

  971. 

  972.     fsdst->ec                  = fsrc->ec;

  973.     fsdst->intra               = fsrc->intra;

  974.     fsdst->slice_damaged       = fssrc->slice_damaged;

  975.     fsdst->key_frame_ok        = fsrc->key_frame_ok;

  976. 

  977.     fsdst->bits_per_raw_sample = fsrc->bits_per_raw_sample;

  978.     fsdst->packed_at_lsb       = fsrc->packed_at_lsb;

  979.     fsdst->slice_count         = fsrc->slice_count;

  980.     if (fsrc->version<3){

  981.         fsdst->slice_x             = fssrc->slice_x;

  982.         fsdst->slice_y             = fssrc->slice_y;

  983.         fsdst->slice_width         = fssrc->slice_width;

  984.         fsdst->slice_height        = fssrc->slice_height;

  985.     }

  986. }

  987. 

  988. #if HAVE_THREADS

  989. static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)

  990. {

  991.     FFV1Context *fsrc = src->priv_data;

  992.     FFV1Context *fdst = dst->priv_data;

  993.     int i, ret;

  994. 

  995.     if (dst == src)

  996.         return 0;

  997. 

  998.     {

  999.         ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;

  1000.         uint8_t (*initial_states[MAX_QUANT_TABLES])[32];

  1001.         struct FFV1Context *slice_context[MAX_SLICES];

  1002.         memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));

  1003.         memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));

  1004. 

  1005.         memcpy(fdst, fsrc, sizeof(*fdst));

  1006.         memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));

  1007.         memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));

  1008.         fdst->picture      = picture;

  1009.         fdst->last_picture = last_picture;

  1010.         for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {

  1011.             FFV1Context *fssrc = fsrc->slice_context[i];

  1012.             FFV1Context *fsdst = fdst->slice_context[i];

  1013.             copy_fields(fsdst, fssrc, fsrc);

  1014.         }

  1015.         av_assert0(!fdst->plane[0].state);

  1016.         av_assert0(!fdst->sample_buffer);

  1017.     }

  1018. 

  1019.     av_assert1(fdst->max_slice_count == fsrc->max_slice_count);

  1020. 

  1021. 

  1022.     ff_thread_release_buffer(dst, &fdst->picture);

  1023.     if (fsrc->picture.f->data[0]) {

  1024.         if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)

  1025.             return ret;

  1026.     }

  1027. 

  1028.     fdst->fsrc = fsrc;

  1029. 

  1030.     return 0;

  1031. }

  1032. #endif

  1033. 

  1034. AVCodec ff_ffv1_decoder = {

  1035.     .name           = "ffv1",

  1036.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1037.     .type           = AVMEDIA_TYPE_VIDEO,

  1038.     .id             = AV_CODEC_ID_FFV1,

  1039.     .priv_data_size = sizeof(FFV1Context),

  1040.     .init           = decode_init,

  1041.     .close          = ff_ffv1_close,

  1042.     .decode         = decode_frame,

  1043.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),

  1044.     .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),

  1045.     .capabilities   = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |

  1046.                       AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,

  1047.     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP

  1048. };