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/* |
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* QuickTime Graphics (SMC) Video Encoder |
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* Copyright (c) 2021 The FFmpeg project |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file smcenc.c |
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* QT SMC Video Encoder by Paul B. Mahol |
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*/ |
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#include "libavutil/common.h" |
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#include "avcodec.h" |
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#include "codec_internal.h" |
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#include "encode.h" |
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#include "bytestream.h" |
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34 |
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#define CPAIR 2 |
35 |
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#define CQUAD 4 |
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#define COCTET 8 |
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#define COLORS_PER_TABLE 256 |
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typedef struct SMCContext { |
41 |
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AVFrame *prev_frame; // buffer for previous source frame |
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uint8_t mono_value; |
44 |
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int nb_distinct; |
45 |
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int next_nb_distinct; |
46 |
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uint8_t distinct_values[16]; |
47 |
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uint8_t next_distinct_values[16]; |
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uint8_t color_pairs[COLORS_PER_TABLE][CPAIR]; |
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uint8_t color_quads[COLORS_PER_TABLE][CQUAD]; |
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uint8_t color_octets[COLORS_PER_TABLE][COCTET]; |
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53 |
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int key_frame; |
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} SMCContext; |
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#define ADVANCE_BLOCK(pixel_ptr, row_ptr, nb_blocks) \ |
57 |
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{ \ |
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for (int block = 0; block < nb_blocks && pixel_ptr && row_ptr; block++) { \ |
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pixel_ptr += 4; \ |
60 |
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if (pixel_ptr - row_ptr >= width) \ |
61 |
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{ \ |
62 |
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row_ptr += stride * 4; \ |
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pixel_ptr = row_ptr; \ |
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} \ |
65 |
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} \ |
66 |
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} |
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static int smc_cmp_values(const void *a, const void *b) |
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{ |
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const uint8_t *aa = a, *bb = b; |
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return FFDIFFSIGN(aa[0], bb[0]); |
73 |
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} |
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static int count_distinct_items(const uint8_t *block_values, |
76 |
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uint8_t *distinct_values, |
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int size) |
78 |
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{ |
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int n = 1; |
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distinct_values[0] = block_values[0]; |
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for (int i = 1; i < size; i++) { |
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if (block_values[i] != block_values[i-1]) { |
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distinct_values[n] = block_values[i]; |
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n++; |
86 |
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} |
87 |
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} |
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return n; |
90 |
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} |
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#define CACHE_PAIR(x) \ |
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(s->color_pairs[i][0] == distinct_values[x] || \ |
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s->color_pairs[i][1] == distinct_values[x]) |
95 |
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96 |
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#define CACHE_QUAD(x) \ |
97 |
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(s->color_quads[i][0] == distinct_values[x] || \ |
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s->color_quads[i][1] == distinct_values[x] || \ |
99 |
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s->color_quads[i][2] == distinct_values[x] || \ |
100 |
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s->color_quads[i][3] == distinct_values[x]) |
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#define CACHE_OCTET(x) \ |
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(s->color_octets[i][0] == distinct_values[x] || \ |
104 |
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s->color_octets[i][1] == distinct_values[x] || \ |
105 |
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s->color_octets[i][2] == distinct_values[x] || \ |
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s->color_octets[i][3] == distinct_values[x] || \ |
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s->color_octets[i][4] == distinct_values[x] || \ |
108 |
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s->color_octets[i][5] == distinct_values[x] || \ |
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s->color_octets[i][6] == distinct_values[x] || \ |
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s->color_octets[i][7] == distinct_values[x]) |
111 |
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static void smc_encode_stream(SMCContext *s, const AVFrame *frame, |
113 |
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PutByteContext *pb) |
114 |
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{ |
115 |
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const uint8_t *src_pixels = (const uint8_t *)frame->data[0]; |
116 |
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const int stride = frame->linesize[0]; |
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const uint8_t *prev_pixels = (const uint8_t *)s->prev_frame->data[0]; |
118 |
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uint8_t *distinct_values = s->distinct_values; |
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const uint8_t *pixel_ptr, *row_ptr; |
120 |
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const int width = frame->width; |
121 |
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uint8_t block_values[16]; |
122 |
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int block_counter = 0; |
123 |
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int color_pair_index = 0; |
124 |
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int color_quad_index = 0; |
125 |
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int color_octet_index = 0; |
126 |
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int color_table_index; /* indexes to color pair, quad, or octet tables */ |
127 |
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int total_blocks; |
128 |
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129 |
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✗ |
memset(s->color_pairs, 0, sizeof(s->color_pairs)); |
130 |
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memset(s->color_quads, 0, sizeof(s->color_quads)); |
131 |
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memset(s->color_octets, 0, sizeof(s->color_octets)); |
132 |
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133 |
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/* Number of 4x4 blocks in frame. */ |
134 |
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✗ |
total_blocks = ((frame->width + 3) / 4) * ((frame->height + 3) / 4); |
135 |
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136 |
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pixel_ptr = row_ptr = src_pixels; |
137 |
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138 |
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while (block_counter < total_blocks) { |
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const uint8_t *xpixel_ptr = pixel_ptr; |
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const uint8_t *xrow_ptr = row_ptr; |
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int intra_skip_blocks = 0; |
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int inter_skip_blocks = 0; |
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int coded_distinct = 0; |
144 |
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int coded_blocks = 0; |
145 |
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int cache_index; |
146 |
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int distinct = 0; |
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int blocks = 0; |
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149 |
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while (prev_pixels && s->key_frame == 0 && block_counter + inter_skip_blocks < total_blocks) { |
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int compare = 0; |
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152 |
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for (int y = 0; y < 4; y++) { |
153 |
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const ptrdiff_t offset = pixel_ptr - src_pixels; |
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const uint8_t *prev_pixel_ptr = prev_pixels + offset; |
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156 |
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compare |= memcmp(prev_pixel_ptr + y * stride, pixel_ptr + y * stride, 4); |
157 |
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if (compare) |
158 |
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break; |
159 |
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} |
160 |
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161 |
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if (compare) |
162 |
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break; |
163 |
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164 |
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if (inter_skip_blocks >= 256) |
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break; |
166 |
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inter_skip_blocks++; |
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168 |
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ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
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} |
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171 |
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pixel_ptr = xpixel_ptr; |
172 |
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row_ptr = xrow_ptr; |
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174 |
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while (block_counter > 0 && block_counter + intra_skip_blocks < total_blocks) { |
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const ptrdiff_t offset = pixel_ptr - src_pixels; |
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const int sy = offset / stride; |
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const int sx = offset % stride; |
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const int ny = sx < 4 ? sy - 4 : sy; |
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const int nx = sx < 4 ? width - 4 : sx - 4; |
180 |
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const uint8_t *old_pixel_ptr = src_pixels + nx + ny * stride; |
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int compare = 0; |
182 |
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183 |
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for (int y = 0; y < 4; y++) { |
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compare |= memcmp(old_pixel_ptr + y * stride, pixel_ptr + y * stride, 4); |
185 |
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if (compare) |
186 |
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break; |
187 |
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} |
188 |
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189 |
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✗ |
if (compare) |
190 |
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break; |
191 |
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192 |
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if (intra_skip_blocks >= 256) |
193 |
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break; |
194 |
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intra_skip_blocks++; |
195 |
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ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
196 |
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} |
197 |
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198 |
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pixel_ptr = xpixel_ptr; |
199 |
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row_ptr = xrow_ptr; |
200 |
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201 |
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while (block_counter + coded_blocks < total_blocks && coded_blocks < 256) { |
202 |
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for (int y = 0; y < 4; y++) |
203 |
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memcpy(block_values + y * 4, pixel_ptr + y * stride, 4); |
204 |
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205 |
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qsort(block_values, 16, sizeof(block_values[0]), smc_cmp_values); |
206 |
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s->next_nb_distinct = count_distinct_items(block_values, s->next_distinct_values, 16); |
207 |
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if (coded_blocks == 0) { |
208 |
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memcpy(distinct_values, s->next_distinct_values, sizeof(s->distinct_values)); |
209 |
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s->nb_distinct = s->next_nb_distinct; |
210 |
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} else { |
211 |
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if (s->next_nb_distinct != s->nb_distinct || |
212 |
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memcmp(distinct_values, s->next_distinct_values, s->nb_distinct)) { |
213 |
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break; |
214 |
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} |
215 |
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} |
216 |
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✗ |
s->mono_value = block_values[0]; |
217 |
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218 |
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coded_distinct = s->nb_distinct; |
219 |
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ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
220 |
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coded_blocks++; |
221 |
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if (coded_distinct > 1 && coded_blocks >= 16) |
222 |
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break; |
223 |
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} |
224 |
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225 |
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✗ |
pixel_ptr = xpixel_ptr; |
226 |
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row_ptr = xrow_ptr; |
227 |
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228 |
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blocks = coded_blocks; |
229 |
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distinct = coded_distinct; |
230 |
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231 |
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if (intra_skip_blocks > 0 && intra_skip_blocks >= inter_skip_blocks && |
232 |
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intra_skip_blocks > 0) { |
233 |
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distinct = 17; |
234 |
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blocks = intra_skip_blocks; |
235 |
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} |
236 |
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237 |
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✗ |
if (intra_skip_blocks > 16 && intra_skip_blocks >= inter_skip_blocks && |
238 |
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intra_skip_blocks > 0) { |
239 |
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distinct = 18; |
240 |
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✗ |
blocks = intra_skip_blocks; |
241 |
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} |
242 |
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243 |
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✗ |
if (inter_skip_blocks > 0 && inter_skip_blocks > intra_skip_blocks && |
244 |
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inter_skip_blocks > 0) { |
245 |
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distinct = 19; |
246 |
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✗ |
blocks = inter_skip_blocks; |
247 |
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} |
248 |
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249 |
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✗ |
if (inter_skip_blocks > 16 && inter_skip_blocks > intra_skip_blocks && |
250 |
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inter_skip_blocks > 0) { |
251 |
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✗ |
distinct = 20; |
252 |
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✗ |
blocks = inter_skip_blocks; |
253 |
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} |
254 |
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|
255 |
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✗ |
switch (distinct) { |
256 |
|
✗ |
case 1: |
257 |
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✗ |
if (blocks <= 16) { |
258 |
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✗ |
bytestream2_put_byte(pb, 0x60 | (blocks - 1)); |
259 |
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} else { |
260 |
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✗ |
bytestream2_put_byte(pb, 0x70); |
261 |
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✗ |
bytestream2_put_byte(pb, blocks - 1); |
262 |
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} |
263 |
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✗ |
bytestream2_put_byte(pb, s->mono_value); |
264 |
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✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, blocks) |
265 |
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✗ |
break; |
266 |
|
✗ |
case 2: |
267 |
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✗ |
cache_index = -1; |
268 |
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✗ |
for (int i = 0; i < COLORS_PER_TABLE; i++) { |
269 |
|
✗ |
if (CACHE_PAIR(0) && |
270 |
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✗ |
CACHE_PAIR(1)) { |
271 |
|
✗ |
cache_index = i; |
272 |
|
✗ |
break; |
273 |
|
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} |
274 |
|
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} |
275 |
|
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|
276 |
|
✗ |
if (cache_index >= 0) { |
277 |
|
✗ |
bytestream2_put_byte(pb, 0x90 | (blocks - 1)); |
278 |
|
✗ |
bytestream2_put_byte(pb, cache_index); |
279 |
|
✗ |
color_table_index = cache_index; |
280 |
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} else { |
281 |
|
✗ |
bytestream2_put_byte(pb, 0x80 | (blocks - 1)); |
282 |
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|
283 |
|
✗ |
color_table_index = color_pair_index; |
284 |
|
✗ |
for (int i = 0; i < CPAIR; i++) { |
285 |
|
✗ |
s->color_pairs[color_table_index][i] = distinct_values[i]; |
286 |
|
✗ |
bytestream2_put_byte(pb, distinct_values[i]); |
287 |
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} |
288 |
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|
289 |
|
✗ |
color_pair_index++; |
290 |
|
✗ |
if (color_pair_index == COLORS_PER_TABLE) |
291 |
|
✗ |
color_pair_index = 0; |
292 |
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|
} |
293 |
|
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|
294 |
|
✗ |
for (int i = 0; i < blocks; i++) { |
295 |
|
✗ |
uint8_t value = s->color_pairs[color_table_index][1]; |
296 |
|
✗ |
uint16_t flags = 0; |
297 |
|
✗ |
int shift = 15; |
298 |
|
|
|
299 |
|
✗ |
for (int y = 0; y < 4; y++) { |
300 |
|
✗ |
for (int x = 0; x < 4; x++) { |
301 |
|
✗ |
flags |= (value == pixel_ptr[x + y * stride]) << shift; |
302 |
|
✗ |
shift--; |
303 |
|
|
} |
304 |
|
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} |
305 |
|
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|
306 |
|
✗ |
bytestream2_put_be16(pb, flags); |
307 |
|
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|
308 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
309 |
|
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} |
310 |
|
✗ |
break; |
311 |
|
✗ |
case 3: |
312 |
|
|
case 4: |
313 |
|
✗ |
cache_index = -1; |
314 |
|
✗ |
for (int i = 0; i < COLORS_PER_TABLE; i++) { |
315 |
|
✗ |
if (CACHE_QUAD(0) && |
316 |
|
✗ |
CACHE_QUAD(1) && |
317 |
|
✗ |
CACHE_QUAD(2) && |
318 |
|
✗ |
CACHE_QUAD(3)) { |
319 |
|
✗ |
cache_index = i; |
320 |
|
✗ |
break; |
321 |
|
|
} |
322 |
|
|
} |
323 |
|
|
|
324 |
|
✗ |
if (cache_index >= 0) { |
325 |
|
✗ |
bytestream2_put_byte(pb, 0xB0 | (blocks - 1)); |
326 |
|
✗ |
bytestream2_put_byte(pb, cache_index); |
327 |
|
✗ |
color_table_index = cache_index; |
328 |
|
|
} else { |
329 |
|
✗ |
bytestream2_put_byte(pb, 0xA0 | (blocks - 1)); |
330 |
|
|
|
331 |
|
✗ |
color_table_index = color_quad_index; |
332 |
|
✗ |
for (int i = 0; i < CQUAD; i++) { |
333 |
|
✗ |
s->color_quads[color_table_index][i] = distinct_values[i]; |
334 |
|
✗ |
bytestream2_put_byte(pb, distinct_values[i]); |
335 |
|
|
} |
336 |
|
|
|
337 |
|
✗ |
color_quad_index++; |
338 |
|
✗ |
if (color_quad_index == COLORS_PER_TABLE) |
339 |
|
✗ |
color_quad_index = 0; |
340 |
|
|
} |
341 |
|
|
|
342 |
|
✗ |
for (int i = 0; i < blocks; i++) { |
343 |
|
✗ |
uint32_t flags = 0; |
344 |
|
|
uint8_t quad[4]; |
345 |
|
✗ |
int shift = 30; |
346 |
|
|
|
347 |
|
✗ |
for (int k = 0; k < 4; k++) |
348 |
|
✗ |
quad[k] = s->color_quads[color_table_index][k]; |
349 |
|
|
|
350 |
|
✗ |
for (int y = 0; y < 4; y++) { |
351 |
|
✗ |
for (int x = 0; x < 4; x++) { |
352 |
|
✗ |
int pixel = pixel_ptr[x + y * stride]; |
353 |
|
✗ |
uint32_t idx = 0; |
354 |
|
|
|
355 |
|
✗ |
for (int w = 0; w < CQUAD; w++) { |
356 |
|
✗ |
if (quad[w] == pixel) { |
357 |
|
✗ |
idx = w; |
358 |
|
✗ |
break; |
359 |
|
|
} |
360 |
|
|
} |
361 |
|
|
|
362 |
|
✗ |
flags |= idx << shift; |
363 |
|
✗ |
shift -= 2; |
364 |
|
|
} |
365 |
|
|
} |
366 |
|
|
|
367 |
|
✗ |
bytestream2_put_be32(pb, flags); |
368 |
|
|
|
369 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
370 |
|
|
} |
371 |
|
✗ |
break; |
372 |
|
✗ |
case 5: |
373 |
|
|
case 6: |
374 |
|
|
case 7: |
375 |
|
|
case 8: |
376 |
|
✗ |
cache_index = -1; |
377 |
|
✗ |
for (int i = 0; i < COLORS_PER_TABLE; i++) { |
378 |
|
✗ |
if (CACHE_OCTET(0) && |
379 |
|
✗ |
CACHE_OCTET(1) && |
380 |
|
✗ |
CACHE_OCTET(2) && |
381 |
|
✗ |
CACHE_OCTET(3) && |
382 |
|
✗ |
CACHE_OCTET(4) && |
383 |
|
✗ |
CACHE_OCTET(5) && |
384 |
|
✗ |
CACHE_OCTET(6) && |
385 |
|
✗ |
CACHE_OCTET(7)) { |
386 |
|
✗ |
cache_index = i; |
387 |
|
✗ |
break; |
388 |
|
|
} |
389 |
|
|
} |
390 |
|
|
|
391 |
|
✗ |
if (cache_index >= 0) { |
392 |
|
✗ |
bytestream2_put_byte(pb, 0xD0 | (blocks - 1)); |
393 |
|
✗ |
bytestream2_put_byte(pb, cache_index); |
394 |
|
✗ |
color_table_index = cache_index; |
395 |
|
|
} else { |
396 |
|
✗ |
bytestream2_put_byte(pb, 0xC0 | (blocks - 1)); |
397 |
|
|
|
398 |
|
✗ |
color_table_index = color_octet_index; |
399 |
|
✗ |
for (int i = 0; i < COCTET; i++) { |
400 |
|
✗ |
s->color_octets[color_table_index][i] = distinct_values[i]; |
401 |
|
✗ |
bytestream2_put_byte(pb, distinct_values[i]); |
402 |
|
|
} |
403 |
|
|
|
404 |
|
✗ |
color_octet_index++; |
405 |
|
✗ |
if (color_octet_index == COLORS_PER_TABLE) |
406 |
|
✗ |
color_octet_index = 0; |
407 |
|
|
} |
408 |
|
|
|
409 |
|
✗ |
for (int i = 0; i < blocks; i++) { |
410 |
|
✗ |
uint64_t flags = 0; |
411 |
|
|
uint8_t octet[8]; |
412 |
|
✗ |
int shift = 45; |
413 |
|
|
|
414 |
|
✗ |
for (int k = 0; k < 8; k++) |
415 |
|
✗ |
octet[k] = s->color_octets[color_table_index][k]; |
416 |
|
|
|
417 |
|
✗ |
for (int y = 0; y < 4; y++) { |
418 |
|
✗ |
for (int x = 0; x < 4; x++) { |
419 |
|
✗ |
int pixel = pixel_ptr[x + y * stride]; |
420 |
|
✗ |
uint64_t idx = 0; |
421 |
|
|
|
422 |
|
✗ |
for (int w = 0; w < COCTET; w++) { |
423 |
|
✗ |
if (octet[w] == pixel) { |
424 |
|
✗ |
idx = w; |
425 |
|
✗ |
break; |
426 |
|
|
} |
427 |
|
|
} |
428 |
|
|
|
429 |
|
✗ |
flags |= idx << shift; |
430 |
|
✗ |
shift -= 3; |
431 |
|
|
} |
432 |
|
|
} |
433 |
|
|
|
434 |
|
✗ |
bytestream2_put_be16(pb, ((flags >> 32) & 0xFFF0) | ((flags >> 8) & 0xF)); |
435 |
|
✗ |
bytestream2_put_be16(pb, ((flags >> 20) & 0xFFF0) | ((flags >> 4) & 0xF)); |
436 |
|
✗ |
bytestream2_put_be16(pb, ((flags >> 8) & 0xFFF0) | ((flags >> 0) & 0xF)); |
437 |
|
|
|
438 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
439 |
|
|
} |
440 |
|
✗ |
break; |
441 |
|
✗ |
default: |
442 |
|
✗ |
bytestream2_put_byte(pb, 0xE0 | (blocks - 1)); |
443 |
|
✗ |
for (int i = 0; i < blocks; i++) { |
444 |
|
✗ |
for (int y = 0; y < 4; y++) { |
445 |
|
✗ |
for (int x = 0; x < 4; x++) |
446 |
|
✗ |
bytestream2_put_byte(pb, pixel_ptr[x + y * stride]); |
447 |
|
|
} |
448 |
|
|
|
449 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, 1) |
450 |
|
|
} |
451 |
|
✗ |
break; |
452 |
|
✗ |
case 17: |
453 |
|
✗ |
bytestream2_put_byte(pb, 0x20 | (blocks - 1)); |
454 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, blocks) |
455 |
|
✗ |
break; |
456 |
|
✗ |
case 18: |
457 |
|
✗ |
bytestream2_put_byte(pb, 0x30); |
458 |
|
✗ |
bytestream2_put_byte(pb, blocks - 1); |
459 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, blocks) |
460 |
|
✗ |
break; |
461 |
|
✗ |
case 19: |
462 |
|
✗ |
bytestream2_put_byte(pb, 0x00 | (blocks - 1)); |
463 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, blocks) |
464 |
|
✗ |
break; |
465 |
|
✗ |
case 20: |
466 |
|
✗ |
bytestream2_put_byte(pb, 0x10); |
467 |
|
✗ |
bytestream2_put_byte(pb, blocks - 1); |
468 |
|
✗ |
ADVANCE_BLOCK(pixel_ptr, row_ptr, blocks) |
469 |
|
✗ |
break; |
470 |
|
|
} |
471 |
|
|
|
472 |
|
✗ |
block_counter += blocks; |
473 |
|
|
} |
474 |
|
|
} |
475 |
|
|
|
476 |
|
✗ |
static int smc_encode_init(AVCodecContext *avctx) |
477 |
|
|
{ |
478 |
|
✗ |
SMCContext *s = avctx->priv_data; |
479 |
|
|
|
480 |
|
✗ |
avctx->bits_per_coded_sample = 8; |
481 |
|
|
|
482 |
|
✗ |
s->prev_frame = av_frame_alloc(); |
483 |
|
✗ |
if (!s->prev_frame) |
484 |
|
✗ |
return AVERROR(ENOMEM); |
485 |
|
|
|
486 |
|
✗ |
return 0; |
487 |
|
|
} |
488 |
|
|
|
489 |
|
✗ |
static int smc_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
490 |
|
|
const AVFrame *frame, int *got_packet) |
491 |
|
|
{ |
492 |
|
✗ |
SMCContext *s = avctx->priv_data; |
493 |
|
✗ |
const AVFrame *pict = frame; |
494 |
|
|
PutByteContext pb; |
495 |
|
|
uint8_t *pal; |
496 |
|
|
int ret; |
497 |
|
|
|
498 |
|
✗ |
ret = ff_alloc_packet(avctx, pkt, 8LL * avctx->height * avctx->width); |
499 |
|
✗ |
if (ret < 0) |
500 |
|
✗ |
return ret; |
501 |
|
|
|
502 |
|
✗ |
if (avctx->gop_size == 0 || !s->prev_frame->data[0] || |
503 |
|
✗ |
(avctx->frame_number % avctx->gop_size) == 0) { |
504 |
|
✗ |
s->key_frame = 1; |
505 |
|
|
} else { |
506 |
|
✗ |
s->key_frame = 0; |
507 |
|
|
} |
508 |
|
|
|
509 |
|
✗ |
bytestream2_init_writer(&pb, pkt->data, pkt->size); |
510 |
|
|
|
511 |
|
✗ |
bytestream2_put_be32(&pb, 0x00); |
512 |
|
|
|
513 |
|
✗ |
pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE); |
514 |
|
✗ |
if (!pal) |
515 |
|
✗ |
return AVERROR(ENOMEM); |
516 |
|
✗ |
memcpy(pal, frame->data[1], AVPALETTE_SIZE); |
517 |
|
|
|
518 |
|
✗ |
smc_encode_stream(s, pict, &pb); |
519 |
|
|
|
520 |
|
✗ |
av_shrink_packet(pkt, bytestream2_tell_p(&pb)); |
521 |
|
|
|
522 |
|
✗ |
pkt->data[0] = 0x0; |
523 |
|
|
|
524 |
|
|
// write chunk length |
525 |
|
✗ |
AV_WB24(pkt->data + 1, pkt->size); |
526 |
|
|
|
527 |
|
✗ |
av_frame_unref(s->prev_frame); |
528 |
|
✗ |
ret = av_frame_ref(s->prev_frame, frame); |
529 |
|
✗ |
if (ret < 0) { |
530 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, "cannot add reference\n"); |
531 |
|
✗ |
return ret; |
532 |
|
|
} |
533 |
|
|
|
534 |
|
✗ |
if (s->key_frame) |
535 |
|
✗ |
pkt->flags |= AV_PKT_FLAG_KEY; |
536 |
|
|
|
537 |
|
✗ |
*got_packet = 1; |
538 |
|
|
|
539 |
|
✗ |
return 0; |
540 |
|
|
} |
541 |
|
|
|
542 |
|
✗ |
static int smc_encode_end(AVCodecContext *avctx) |
543 |
|
|
{ |
544 |
|
✗ |
SMCContext *s = (SMCContext *)avctx->priv_data; |
545 |
|
|
|
546 |
|
✗ |
av_frame_free(&s->prev_frame); |
547 |
|
|
|
548 |
|
✗ |
return 0; |
549 |
|
|
} |
550 |
|
|
|
551 |
|
|
const FFCodec ff_smc_encoder = { |
552 |
|
|
.p.name = "smc", |
553 |
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("QuickTime Graphics (SMC)"), |
554 |
|
|
.p.type = AVMEDIA_TYPE_VIDEO, |
555 |
|
|
.p.id = AV_CODEC_ID_SMC, |
556 |
|
|
.priv_data_size = sizeof(SMCContext), |
557 |
|
|
.init = smc_encode_init, |
558 |
|
|
FF_CODEC_ENCODE_CB(smc_encode_frame), |
559 |
|
|
.close = smc_encode_end, |
560 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, |
561 |
|
|
.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_PAL8, |
562 |
|
|
AV_PIX_FMT_NONE}, |
563 |
|
|
}; |
564 |
|
|
|