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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;

  49.         unsigned a;

  50.         e = 0;

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

  52.             e++;

  53.             if (e > 31)

  54.                 return AVERROR_INVALIDDATA;

  55.         }

  56. 

  57.         a = 1;

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

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

  60. 

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

  62.         return (a ^ e) - e;

  63.     }

  64. }

  65. 

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

  67. {

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

  69. }

  70. 

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

  72.                                  int bits)

  73. {

  74.     int k, i, v, ret;

  75. 

  76.     i = state->count;

  77.     k = 0;

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

  79.         k++;

  80.         i += i;

  81.     }

  82. 

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

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

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

  86. 

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

  88. 

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

  90. 

  91.     update_vlc_state(state, v);

  92. 

  93.     return ret;

  94. }

  95. 

  96. #define TYPE int16_t

  97. #define RENAME(name) name

  98. #include "ffv1dec_template.c"

  99. #undef TYPE

  100. #undef RENAME

  101. 

  102. #define TYPE int32_t

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

  104. #include "ffv1dec_template.c"

  105. 

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

  107.                          int w, int h, int stride, int plane_index,

  108.                          int pixel_stride)

  109. {

  110.     int x, y;

  111.     int16_t *sample[2];

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

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

  114. 

  115.     s->run_index = 0;

  116. 

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

  118. 

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

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

  121. 

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

  123.         sample[1] = temp;

  124. 

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

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

  127. 

  128. // { START_TIMER

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

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

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

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

  133.         } else {

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

  135.             if (s->packed_at_lsb) {

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

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

  138.                 }

  139.             } else {

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

  141.                     ((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);

  142.                 }

  143.             }

  144.         }

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

  146.     }

  147. }

  148. 

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

  150. {

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

  152.     uint8_t state[CONTEXT_SIZE];

  153.     unsigned ps, i, context_count;

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

  155. 

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

  157. 

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

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

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

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

  162. 

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

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

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

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

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

  168.         return -1;

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

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

  171.         return -1;

  172. 

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

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

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

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

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

  178.             return -1;

  179.         }

  180.         p->quant_table_index = idx;

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

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

  183. 

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

  185.             av_freep(&p->state);

  186.             av_freep(&p->vlc_state);

  187.         }

  188.         p->context_count = context_count;

  189.     }

  190. 

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

  192.     if (ps == 1) {

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

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

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

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

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

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

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

  200.     }

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

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

  203. 

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

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

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

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

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

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

  210.     }

  211. 

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

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

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

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

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

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

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

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

  220.                 return AVERROR_INVALIDDATA;

  221.             }

  222.         }

  223.     }

  224. 

  225.     return 0;

  226. }

  227. 

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

  229. {

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

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

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

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

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

  235.     int i, si;

  236. 

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

  238.         ;

  239. 

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

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

  242. 

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

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

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

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

  247.         av_assert1(fsdst == fs);

  248. 

  249.         if (!p->key_frame)

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

  251. 

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

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

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

  255. 

  256.             av_free(pdst->state);

  257.             av_free(pdst->vlc_state);

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

  259.             pdst->state = NULL;

  260.             pdst->vlc_state = NULL;

  261. 

  262.             if (fssrc->ac) {

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

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

  265.             } else {

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

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

  268.             }

  269.         }

  270.     }

  271. 

  272.     fs->slice_rct_by_coef = 1;

  273.     fs->slice_rct_ry_coef = 1;

  274. 

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

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

  277.             return AVERROR(ENOMEM);

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

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

  280.             fs->slice_damaged = 1;

  281.             return AVERROR_INVALIDDATA;

  282.         }

  283.     }

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

  285.         return ret;

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

  287.         ff_ffv1_clear_slice_state(f, fs);

  288. 

  289.     width  = fs->slice_width;

  290.     height = fs->slice_height;

  291.     x      = fs->slice_x;

  292.     y      = fs->slice_y;

  293. 

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

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

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

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

  298.         init_get_bits(&fs->gb,

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

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

  301.     }

  302. 

  303.     av_assert1(width && height);

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

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

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

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

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

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

  310. 

  311.         if (f->chroma_planes) {

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

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

  314.         }

  315.         if (fs->transparency)

  316.             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);

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

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

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

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

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

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

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

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

  325.     } else {

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

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

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

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

  330.     }

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

  332.         int v;

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

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

  335.         if (v) {

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

  337.             fs->slice_damaged = 1;

  338.         }

  339.     }

  340. 

  341.     emms_c();

  342. 

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

  344. 

  345.     return 0;

  346. }

  347. 

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

  349. {

  350.     int v;

  351.     int i = 0;

  352.     uint8_t state[CONTEXT_SIZE];

  353. 

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

  355. 

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

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

  358. 

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

  360.             return AVERROR_INVALIDDATA;

  361. 

  362.         while (len--) {

  363.             quant_table[i] = scale * v;

  364.             i++;

  365.         }

  366.     }

  367. 

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

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

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

  371. 

  372.     return 2 * v - 1;

  373. }

  374. 

  375. static int read_quant_tables(RangeCoder *c,

  376.                              int16_t quant_table[MAX_CONTEXT_INPUTS][256])

  377. {

  378.     int i;

  379.     int context_count = 1;

  380. 

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

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

  383.         if (ret < 0)

  384.             return ret;

  385.         context_count *= ret;

  386.         if (context_count > 32768U) {

  387.             return AVERROR_INVALIDDATA;

  388.         }

  389.     }

  390.     return (context_count + 1) / 2;

  391. }

  392. 

  393. static int read_extra_header(FFV1Context *f)

  394. {

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

  396.     uint8_t state[CONTEXT_SIZE];

  397.     int i, j, k, ret;

  398.     uint8_t state2[32][CONTEXT_SIZE];

  399.     unsigned crc = 0;

  400. 

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

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

  403. 

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

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

  406. 

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

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

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

  410.         return AVERROR_INVALIDDATA;

  411.     }

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

  413.         c->bytestream_end -= 4;

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

  415.         if (f->micro_version < 0)

  416.             return AVERROR_INVALIDDATA;

  417.     }

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

  419. 

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

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

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

  423.     }

  424. 

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

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

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

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

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

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

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

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

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

  434. 

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

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

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

  438.         return AVERROR_INVALIDDATA;

  439.     }

  440. 

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

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

  443.        ) {

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

  445.         return AVERROR_INVALIDDATA;

  446.     }

  447. 

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

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

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

  451.         f->quant_table_count = 0;

  452.         return AVERROR_INVALIDDATA;

  453.     }

  454. 

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

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

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

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

  459.             return AVERROR_INVALIDDATA;

  460.         }

  461.     }

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

  463.         return ret;

  464. 

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

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

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

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

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

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

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

  472.                 }

  473.         }

  474. 

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

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

  477.         if (f->micro_version > 2)

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

  479.     }

  480. 

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

  482.         unsigned v;

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

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

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

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

  487.             return AVERROR_INVALIDDATA;

  488.         }

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

  490.     }

  491. 

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

  493.         av_log(f->avctx, AV_LOG_DEBUG,

  494.                "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",

  495.                f->version, f->micro_version,

  496.                f->ac,

  497.                f->colorspace,

  498.                f->avctx->bits_per_raw_sample,

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

  500.                f->transparency,

  501.                f->num_h_slices, f->num_v_slices,

  502.                f->quant_table_count,

  503.                f->ec,

  504.                f->intra,

  505.                crc

  506.               );

  507.     return 0;

  508. }

  509. 

  510. static int read_header(FFV1Context *f)

  511. {

  512.     uint8_t state[CONTEXT_SIZE];

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

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

  515. 

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

  517. 

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

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

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

  521.         if (v >= 2) {

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

  523.             return AVERROR_INVALIDDATA;

  524.         }

  525.         f->version = v;

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

  527. 

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

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

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

  531.         }

  532. 

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

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

  535.         chroma_planes       = get_rac(c, state);

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

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

  538.         transparency        = get_rac(c, state);

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

  540.             transparency = 0;

  541. 

  542.         if (f->plane_count) {

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

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

  545.                 chroma_planes       != f->chroma_planes              ||

  546.                 chroma_h_shift      != f->chroma_h_shift             ||

  547.                 chroma_v_shift      != f->chroma_v_shift             ||

  548.                 transparency        != f->transparency) {

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

  550.                 return AVERROR_INVALIDDATA;

  551.             }

  552.         }

  553. 

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

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

  556.                    chroma_h_shift, chroma_v_shift);

  557.             return AVERROR_INVALIDDATA;

  558.         }

  559. 

  560.         f->colorspace                 = colorspace;

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

  562.         f->chroma_planes              = chroma_planes;

  563.         f->chroma_h_shift             = chroma_h_shift;

  564.         f->chroma_v_shift             = chroma_v_shift;

  565.         f->transparency               = transparency;

  566. 

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

  568.     }

  569. 

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

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

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

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

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

  575.                 f->packed_at_lsb = 1;

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

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

  578.                 f->packed_at_lsb = 1;

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

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

  581.                 f->packed_at_lsb = 1;

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

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

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

  585.             } else

  586.                 return AVERROR(ENOSYS);

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

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

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

  590.             else

  591.                 return AVERROR(ENOSYS);

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

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

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

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

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

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

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

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

  600.             }

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

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

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

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

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

  606.             }

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

  608.             f->packed_at_lsb = 1;

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

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

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

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

  613.             }

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

  615.             f->packed_at_lsb = 1;

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

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

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

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

  620.             }

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

  622.             f->packed_at_lsb = 1;

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

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

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

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

  627.             }

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

  629.             f->packed_at_lsb = 1;

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

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

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

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

  634.             }

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

  636.             f->packed_at_lsb = 1;

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

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

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

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

  641.             }

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

  643.             f->packed_at_lsb = 1;

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

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

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

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

  648.             }

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

  650.             f->packed_at_lsb = 1;

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

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

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

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

  655.             }

  656.         }

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

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

  659.             av_log(f->avctx, AV_LOG_ERROR,

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

  661.             return AVERROR(ENOSYS);

  662.         }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  677.             f->use32bit = 1;

  678.         }

  679.     } else {

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

  681.         return AVERROR(ENOSYS);

  682.     }

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

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

  685.         return AVERROR(ENOSYS);

  686.     }

  687. 

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

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

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

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

  692.         if (context_count < 0) {

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

  694.             return AVERROR_INVALIDDATA;

  695.         }

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

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

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

  699.     } else {

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

  701.         for (f->slice_count = 0;

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

  703.              f->slice_count++) {

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

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

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

  707.                 break;

  708.             p -= size + trailer;

  709.         }

  710.     }

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

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

  713.         return AVERROR_INVALIDDATA;

  714.     }

  715. 

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

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

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

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

  720. 

  721.         fs->slice_damaged = 0;

  722. 

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

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

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

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

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

  728. 

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

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

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

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

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

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

  735.                 return AVERROR_INVALIDDATA;

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

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

  738.                 return AVERROR_INVALIDDATA;

  739.         }

  740. 

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

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

  743. 

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

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

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

  747.                     av_log(f->avctx, AV_LOG_ERROR,

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

  749.                     return AVERROR_INVALIDDATA;

  750.                 }

  751.                 p->quant_table_index = idx;

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

  753.                        sizeof(p->quant_table));

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

  755.             } else {

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

  757.             }

  758. 

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

  760.                 av_assert0(context_count >= 0);

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

  762.                     av_freep(&p->state);

  763.                     av_freep(&p->vlc_state);

  764.                 }

  765.                 p->context_count = context_count;

  766.             }

  767.         }

  768.     }

  769.     return 0;

  770. }

  771. 

  772. static av_cold int decode_init(AVCodecContext *avctx)

  773. {

  774.     FFV1Context *f = avctx->priv_data;

  775.     int ret;

  776. 

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

  778.         return ret;

  779. 

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

  781.         return ret;

  782. 

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

  784.         return ret;

  785. 

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

  787. 

  788.     return 0;

  789. }

  790. 

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

  792. {

  793.     uint8_t *buf        = avpkt->data;

  794.     int buf_size        = avpkt->size;

  795.     FFV1Context *f      = avctx->priv_data;

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

  797.     int i, ret;

  798.     uint8_t keystate = 128;

  799.     uint8_t *buf_p;

  800.     AVFrame *p;

  801. 

  802.     if (f->last_picture.f)

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

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

  805. 

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

  807. 

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

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

  810.         p->interlaced_frame = 1;

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

  812.             p->top_field_first = 1;

  813.     }

  814. 

  815.     f->avctx = avctx;

  816.     ff_init_range_decoder(c, buf, buf_size);

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

  818. 

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

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

  821.         p->key_frame    = 1;

  822.         f->key_frame_ok = 0;

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

  824.             return ret;

  825.         f->key_frame_ok = 1;

  826.     } else {

  827.         if (!f->key_frame_ok) {

  828.             av_log(avctx, AV_LOG_ERROR,

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

  830.             return AVERROR_INVALIDDATA;

  831.         }

  832.         p->key_frame = 0;

  833.     }

  834. 

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

  836.         return ret;

  837. 

  838.     if (avctx->debug & FF_DEBUG_PICT_INFO)

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

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

  841. 

  842.     ff_thread_finish_setup(avctx);

  843. 

  844.     buf_p = buf + buf_size;

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

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

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

  848.         int v;

  849. 

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

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

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

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

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

  855.             return AVERROR_INVALIDDATA;

  856.         }

  857.         buf_p -= v;

  858. 

  859.         if (f->ec) {

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

  861.             if (crc) {

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

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

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

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

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

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

  868.                 } else {

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

  870.                 }

  871.                 fs->slice_damaged = 1;

  872.             }

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

  874.                 av_log(avctx, AV_LOG_DEBUG, "slice %d, CRC: 0x%08"PRIX32"\n", i, AV_RB32(buf_p + v - 4));

  875.             }

  876.         }

  877. 

  878.         if (i) {

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

  880.         } else

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

  882. 

  883.         fs->avctx = avctx;

  884.         fs->cur = p;

  885.     }

  886. 

  887.     avctx->execute(avctx,

  888.                    decode_slice,

  889.                    &f->slice_context[0],

  890.                    NULL,

  891.                    f->slice_count,

  892.                    sizeof(void*));

  893. 

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

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

  896.         int j;

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

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

  899.             const uint8_t *src[4];

  900.             uint8_t *dst[4];

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

  902.             for (j = 0; j < desc->nb_components; j++) {

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

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

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

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

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

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

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

  910. 

  911.             }

  912.             if (desc->flags & AV_PIX_FMT_FLAG_PAL ||

  913.                 desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {

  914.                 dst[1] = p->data[1];

  915.                 src[1] = f->last_picture.f->data[1];

  916.             }

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

  918.                           f->last_picture.f->linesize,

  919.                           avctx->pix_fmt,

  920.                           fs->slice_width,

  921.                           fs->slice_height);

  922.         }

  923.     }

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

  925. 

  926.     f->picture_number++;

  927. 

  928.     if (f->last_picture.f)

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

  930.     f->cur = NULL;

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

  932.         return ret;

  933. 

  934.     *got_frame = 1;

  935. 

  936.     return buf_size;

  937. }

  938. 

  939. #if HAVE_THREADS

  940. static int init_thread_copy(AVCodecContext *avctx)

  941. {

  942.     FFV1Context *f = avctx->priv_data;

  943.     int i, ret;

  944. 

  945.     f->picture.f      = NULL;

  946.     f->last_picture.f = NULL;

  947.     f->sample_buffer  = NULL;

  948.     f->max_slice_count = 0;

  949.     f->slice_count = 0;

  950. 

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

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

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

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

  955.     }

  956. 

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

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

  959. 

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

  961.         return ret;

  962. 

  963.     return 0;

  964. }

  965. #endif

  966. 

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

  968. {

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

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

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

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

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

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

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

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

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

  978. 

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

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

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

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

  983. 

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

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

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

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

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

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

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

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

  992.     }

  993. }

  994. 

  995. #if HAVE_THREADS

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

  997. {

  998.     FFV1Context *fsrc = src->priv_data;

  999.     FFV1Context *fdst = dst->priv_data;

  1000.     int i, ret;

  1001. 

  1002.     if (dst == src)

  1003.         return 0;

  1004. 

  1005.     {

  1006.         ThreadFrame picture = fdst->picture, last_picture = fdst->last_picture;

  1007.         uint8_t (*initial_states[MAX_QUANT_TABLES])[32];

  1008.         struct FFV1Context *slice_context[MAX_SLICES];

  1009.         memcpy(initial_states, fdst->initial_states, sizeof(fdst->initial_states));

  1010.         memcpy(slice_context,  fdst->slice_context , sizeof(fdst->slice_context));

  1011. 

  1012.         memcpy(fdst, fsrc, sizeof(*fdst));

  1013.         memcpy(fdst->initial_states, initial_states, sizeof(fdst->initial_states));

  1014.         memcpy(fdst->slice_context,  slice_context , sizeof(fdst->slice_context));

  1015.         fdst->picture      = picture;

  1016.         fdst->last_picture = last_picture;

  1017.         for (i = 0; i<fdst->num_h_slices * fdst->num_v_slices; i++) {

  1018.             FFV1Context *fssrc = fsrc->slice_context[i];

  1019.             FFV1Context *fsdst = fdst->slice_context[i];

  1020.             copy_fields(fsdst, fssrc, fsrc);

  1021.         }

  1022.         av_assert0(!fdst->plane[0].state);

  1023.         av_assert0(!fdst->sample_buffer);

  1024.     }

  1025. 

  1026.     av_assert1(fdst->max_slice_count == fsrc->max_slice_count);

  1027. 

  1028. 

  1029.     ff_thread_release_buffer(dst, &fdst->picture);

  1030.     if (fsrc->picture.f->data[0]) {

  1031.         if ((ret = ff_thread_ref_frame(&fdst->picture, &fsrc->picture)) < 0)

  1032.             return ret;

  1033.     }

  1034. 

  1035.     fdst->fsrc = fsrc;

  1036. 

  1037.     return 0;

  1038. }

  1039. #endif

  1040. 

  1041. AVCodec ff_ffv1_decoder = {

  1042.     .name           = "ffv1",

  1043.     .long_name      = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),

  1044.     .type           = AVMEDIA_TYPE_VIDEO,

  1045.     .id             = AV_CODEC_ID_FFV1,

  1046.     .priv_data_size = sizeof(FFV1Context),

  1047.     .init           = decode_init,

  1048.     .close          = ff_ffv1_close,

  1049.     .decode         = decode_frame,

  1050.     .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),

  1051.     .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),

  1052.     .capabilities   = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/ |

  1053.                       AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,

  1054.     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP

  1055. };