| /* | |
| * FFV1 decoder template | |
| * | |
| * Copyright (c) 2003-2016 Michael Niedermayer <michaelni@gmx.at> | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| #include "ffv1_template.c" | |
| static av_always_inline int RENAME(decode_line)(FFV1Context *s, int w, | |
| TYPE *sample[2], | |
| int plane_index, int bits) | |
| { | |
| PlaneContext *const p = &s->plane[plane_index]; | |
| RangeCoder *const c = &s->c; | |
| int x; | |
| int run_count = 0; | |
| int run_mode = 0; | |
| int run_index = s->run_index; | |
| if (is_input_end(s)) | |
| return AVERROR_INVALIDDATA; | |
| if (s->slice_coding_mode == 1) { | |
| int i; | |
| for (x = 0; x < w; x++) { | |
| int v = 0; | |
| for (i=0; i<bits; i++) { | |
| uint8_t state = 128; | |
| v += v + get_rac(c, &state); | |
| } | |
| sample[1][x] = v; | |
| } | |
| return 0; | |
| } | |
| for (x = 0; x < w; x++) { | |
| int diff, context, sign; | |
| if (!(x & 1023)) { | |
| if (is_input_end(s)) | |
| return AVERROR_INVALIDDATA; | |
| } | |
| context = RENAME(get_context)(p, sample[1] + x, sample[0] + x, sample[1] + x); | |
| if (context < 0) { | |
| context = -context; | |
| sign = 1; | |
| } else | |
| sign = 0; | |
| av_assert2(context < p->context_count); | |
| if (s->ac != AC_GOLOMB_RICE) { | |
| diff = get_symbol_inline(c, p->state[context], 1); | |
| } else { | |
| if (context == 0 && run_mode == 0) | |
| run_mode = 1; | |
| if (run_mode) { | |
| if (run_count == 0 && run_mode == 1) { | |
| if (get_bits1(&s->gb)) { | |
| run_count = 1 << ff_log2_run[run_index]; | |
| if (x + run_count <= w) | |
| run_index++; | |
| } else { | |
| if (ff_log2_run[run_index]) | |
| run_count = get_bits(&s->gb, ff_log2_run[run_index]); | |
| else | |
| run_count = 0; | |
| if (run_index) | |
| run_index--; | |
| run_mode = 2; | |
| } | |
| } | |
| if (sample[1][x - 1] == sample[0][x - 1]) { | |
| while (run_count > 1 && w-x > 1) { | |
| sample[1][x] = sample[0][x]; | |
| x++; | |
| run_count--; | |
| } | |
| } else { | |
| while (run_count > 1 && w-x > 1) { | |
| sample[1][x] = RENAME(predict)(sample[1] + x, sample[0] + x); | |
| x++; | |
| run_count--; | |
| } | |
| } | |
| run_count--; | |
| if (run_count < 0) { | |
| run_mode = 0; | |
| run_count = 0; | |
| diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], | |
| bits); | |
| if (diff >= 0) | |
| diff++; | |
| } else | |
| diff = 0; | |
| } else | |
| diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits); | |
| ff_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n", | |
| run_count, run_index, run_mode, x, get_bits_count(&s->gb)); | |
| } | |
| if (sign) | |
| diff = -(unsigned)diff; | |
| sample[1][x] = av_mod_uintp2(RENAME(predict)(sample[1] + x, sample[0] + x) + (SUINT)diff, bits); | |
| } | |
| s->run_index = run_index; | |
| return 0; | |
| } | |
| static int RENAME(decode_rgb_frame)(FFV1Context *s, uint8_t *src[4], int w, int h, int stride[4]) | |
| { | |
| int x, y, p; | |
| TYPE *sample[4][2]; | |
| int lbd = s->avctx->bits_per_raw_sample <= 8; | |
| int bits = s->avctx->bits_per_raw_sample > 0 ? s->avctx->bits_per_raw_sample : 8; | |
| int offset = 1 << bits; | |
| int transparency = s->transparency; | |
| for (x = 0; x < 4; x++) { | |
| sample[x][0] = RENAME(s->sample_buffer) + x * 2 * (w + 6) + 3; | |
| sample[x][1] = RENAME(s->sample_buffer) + (x * 2 + 1) * (w + 6) + 3; | |
| } | |
| s->run_index = 0; | |
| memset(RENAME(s->sample_buffer), 0, 8 * (w + 6) * sizeof(*RENAME(s->sample_buffer))); | |
| for (y = 0; y < h; y++) { | |
| for (p = 0; p < 3 + transparency; p++) { | |
| int ret; | |
| TYPE *temp = sample[p][0]; // FIXME: try a normal buffer | |
| sample[p][0] = sample[p][1]; | |
| sample[p][1] = temp; | |
| sample[p][1][-1]= sample[p][0][0 ]; | |
| sample[p][0][ w]= sample[p][0][w-1]; | |
| if (lbd && s->slice_coding_mode == 0) | |
| ret = RENAME(decode_line)(s, w, sample[p], (p + 1)/2, 9); | |
| else | |
| ret = RENAME(decode_line)(s, w, sample[p], (p + 1)/2, bits + (s->slice_coding_mode != 1)); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| for (x = 0; x < w; x++) { | |
| int g = sample[0][1][x]; | |
| int b = sample[1][1][x]; | |
| int r = sample[2][1][x]; | |
| int a = sample[3][1][x]; | |
| if (s->slice_coding_mode != 1) { | |
| b -= offset; | |
| r -= offset; | |
| g -= (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2; | |
| b += g; | |
| r += g; | |
| } | |
| if (lbd) | |
| *((uint32_t*)(src[0] + x*4 + stride[0]*y)) = b + ((unsigned)g<<8) + ((unsigned)r<<16) + ((unsigned)a<<24); | |
| else if (sizeof(TYPE) == 4 || transparency) { | |
| *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = g; | |
| *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = b; | |
| *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r; | |
| if (transparency) | |
| *((uint16_t*)(src[3] + x*2 + stride[3]*y)) = a; | |
| } else { | |
| *((uint16_t*)(src[0] + x*2 + stride[0]*y)) = b; | |
| *((uint16_t*)(src[1] + x*2 + stride[1]*y)) = g; | |
| *((uint16_t*)(src[2] + x*2 + stride[2]*y)) = r; | |
| } | |
| } | |
| } | |
| return 0; | |
| } |