FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpegutils.c
Date: 2025-10-26 07:25:09
Exec Total Coverage
Lines: 89 173 51.4%
Functions: 3 6 50.0%
Branches: 56 136 41.2%
Line Branch Exec Source
1 /*
2 * Mpeg video formats-related defines and utility functions
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdint.h>
22
23 #include "libavutil/bprint.h"
24 #include "libavutil/common.h"
25 #include "libavutil/emms.h"
26 #include "libavutil/frame.h"
27 #include "libavutil/mem.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/motion_vector.h"
30 #include "libavutil/avassert.h"
31
32 #include "avcodec.h"
33 #include "mpegutils.h"
34
35 5065 static int add_mb(AVMotionVector *mb, uint32_t mb_type,
36 int dst_x, int dst_y,
37 int motion_x, int motion_y, int motion_scale,
38 int direction)
39 {
40
4/4
✓ Branch 0 taken 3381 times.
✓ Branch 1 taken 1684 times.
✓ Branch 2 taken 48 times.
✓ Branch 3 taken 3333 times.
 5065 mb->w = IS_8X8(mb_type) || IS_8X16(mb_type) ? 8 : 16;
41
4/4
✓ Branch 0 taken 3381 times.
✓ Branch 1 taken 1684 times.
✓ Branch 2 taken 86 times.
✓ Branch 3 taken 3295 times.
 5065 mb->h = IS_8X8(mb_type) || IS_16X8(mb_type) ? 8 : 16;
42 5065 mb->motion_x = motion_x;
43 5065 mb->motion_y = motion_y;
44 5065 mb->motion_scale = motion_scale;
45 5065 mb->dst_x = dst_x;
46 5065 mb->dst_y = dst_y;
47 5065 mb->src_x = dst_x + motion_x / motion_scale;
48 5065 mb->src_y = dst_y + motion_y / motion_scale;
49
2/2
✓ Branch 0 taken 1480 times.
✓ Branch 1 taken 3585 times.
 5065 mb->source = direction ? 1 : -1;
50 5065 mb->flags = 0; // XXX: does mb_type contain extra information that could be exported here?
51 5065 return 1;
52 }
53
54 218218 void ff_draw_horiz_band(AVCodecContext *avctx,
55 const AVFrame *cur, const AVFrame *last,
56 int y, int h, int picture_structure,
57 int first_field, int low_delay)
58 {
59 218218 const int field_pic = picture_structure != PICT_FRAME;
60 const AVPixFmtDescriptor *desc;
61 const AVFrame *src;
62 int offset[AV_NUM_DATA_POINTERS];
63
64
2/2
✓ Branch 0 taken 214868 times.
✓ Branch 1 taken 3350 times.
 218218 if (!avctx->draw_horiz_band)
65 214868 return;
66
67
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3350 times.
 3350 if (field_pic) {
68 ✗ h <<= 1;
69 ✗ y <<= 1;
70 }
71
72 3350 h = FFMIN(h, avctx->height - y);
73
74
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 3350 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 3350 if (field_pic && first_field &&
75 ✗ !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
76 ✗ return;
77
78
2/4
✓ Branch 0 taken 3350 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 3350 times.
 3350 if (cur->pict_type == AV_PICTURE_TYPE_B || low_delay ||
79 ✗ (avctx->slice_flags & SLICE_FLAG_CODED_ORDER))
80 3350 src = cur;
81 ✗ else if (last)
82 ✗ src = last;
83 else
84 ✗ return;
85
86 3350 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
87
88 3350 offset[0] = y * src->linesize[0];
89 3350 offset[1] =
90 3350 offset[2] = (y >> desc->log2_chroma_h) * src->linesize[1];
91
2/2
✓ Branch 0 taken 16750 times.
✓ Branch 1 taken 3350 times.
 20100 for (int i = 3; i < AV_NUM_DATA_POINTERS; i++)
92 16750 offset[i] = 0;
93
94 3350 emms_c();
95
96 3350 avctx->draw_horiz_band(avctx, src, offset,
97 y, picture_structure, h);
98 }
99
100 #define HAS_MV_EXT(mb_type, flags, dir) ((mb_type) & flags[(dir)])
101
102 ✗ static char get_type_mv_char(int mb_type, const int mb_type_mv_flags[2])
103 {
104 // Type & MV direction
105 ✗ if (IS_PCM(mb_type))
106 ✗ return 'P';
107 ✗ else if (IS_ACPRED(mb_type))
108 ✗ return 'A';
109 ✗ else if (IS_INTRA4x4(mb_type))
110 ✗ return 'i';
111 ✗ else if (IS_INTRA16x16(mb_type))
112 ✗ return 'I';
113 ✗ else if (IS_DIRECT(mb_type) && IS_SKIP(mb_type))
114 ✗ return 'd';
115 ✗ else if (IS_DIRECT(mb_type))
116 ✗ return 'D';
117 ✗ else if (IS_GMC(mb_type) && IS_SKIP(mb_type))
118 ✗ return 'g';
119 ✗ else if (IS_GMC(mb_type))
120 ✗ return 'G';
121 ✗ else if (IS_SKIP(mb_type))
122 ✗ return 'S';
123 ✗ else if (!HAS_MV_EXT(mb_type, 1, mb_type_mv_flags))
124 ✗ return '>';
125 ✗ else if (!HAS_MV_EXT(mb_type, 0, mb_type_mv_flags))
126 ✗ return '<';
127 else {
128 av_assert2(HAS_MV_EXT(mb_type, 0, mb_type_mv_flags) && HAS_MV_EXT(mb_type, 1, mb_type_mv_flags));
129 ✗ return 'X';
130 }
131 }
132
133 ✗ static char get_segmentation_char(int mb_type)
134 {
135 ✗ if (IS_8X8(mb_type))
136 ✗ return '+';
137 ✗ else if (IS_16X8(mb_type))
138 ✗ return '-';
139 ✗ else if (IS_8X16(mb_type))
140 ✗ return '|';
141 ✗ else if (IS_INTRA(mb_type) || IS_16X16(mb_type))
142 ✗ return ' ';
143
144 ✗ return '?';
145 }
146
147 ✗ static char get_interlacement_char(int mb_type)
148 {
149 ✗ if (IS_INTERLACED(mb_type))
150 ✗ return '=';
151 else
152 ✗ return ' ';
153 }
154
155 35589 void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict,
156 const uint32_t *mbtype_table,
157 const int8_t *qscale_table, int16_t (*const motion_val[2])[2],
158 int mb_width, int mb_height, int mb_stride, int quarter_sample)
159 {
160 35589 const int is_h264 = avctx->codec_id == AV_CODEC_ID_H264;
161
2/2
✓ Branch 0 taken 24372 times.
✓ Branch 1 taken 11217 times.
 35589 const int mb_type_mv_flags[2] = { is_h264 ? MB_TYPE_L0 : MB_TYPE_FORWARD_MV,
162
2/2
✓ Branch 0 taken 24372 times.
✓ Branch 1 taken 11217 times.
 35589 is_h264 ? MB_TYPE_L1 : MB_TYPE_BACKWARD_MV };
163
164
4/6
✓ Branch 0 taken 69 times.
✓ Branch 1 taken 35520 times.
✓ Branch 2 taken 69 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 69 times.
✗ Branch 5 not taken.
 35589 if ((avctx->export_side_data & AV_CODEC_EXPORT_DATA_MVS) && mbtype_table && motion_val[0]) {
165 69 const int shift = 1 + quarter_sample;
166 69 const int scale = 1 << shift;
167
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 69 times.
 69 const int mv_sample_log2 = is_h264 ? 2 : 1;
168 69 const int mv_stride = (mb_width << mv_sample_log2) + !is_h264;
169 69 int mb_x, mb_y, mbcount = 0;
170
171 /* size is width * height * 2 * 4 where 2 is for directions and 4 is
172 * for the maximum number of MB (4 MB in case of IS_8x8) */
173 69 AVMotionVector *mvs = av_malloc_array(mb_width * mb_height, 2 * 4 * sizeof(AVMotionVector));
174
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 69 times.
 69 if (!mvs)
175 ✗ return;
176
177
2/2
✓ Branch 0 taken 1366 times.
✓ Branch 1 taken 69 times.
 1435 for (mb_y = 0; mb_y < mb_height; mb_y++) {
178
2/2
✓ Branch 0 taken 47412 times.
✓ Branch 1 taken 1366 times.
 48778 for (mb_x = 0; mb_x < mb_width; mb_x++) {
179 47412 int i, direction, mb_type = mbtype_table[mb_x + mb_y * mb_stride];
180
2/2
✓ Branch 0 taken 94824 times.
✓ Branch 1 taken 47412 times.
 142236 for (direction = 0; direction < 2; direction++) {
181
2/2
✓ Branch 0 taken 91089 times.
✓ Branch 1 taken 3735 times.
 94824 if (!HAS_MV_EXT(mb_type, direction, mb_type_mv_flags))
182 91089 continue;
183
2/2
✓ Branch 0 taken 421 times.
✓ Branch 1 taken 3314 times.
 3735 if (IS_8X8(mb_type)) {
184
2/2
✓ Branch 0 taken 1684 times.
✓ Branch 1 taken 421 times.
 2105 for (i = 0; i < 4; i++) {
185 1684 int sx = mb_x * 16 + 4 + 8 * (i & 1);
186 1684 int sy = mb_y * 16 + 4 + 8 * (i >> 1);
187 1684 int xy = (mb_x * 2 + (i & 1) +
188 1684 (mb_y * 2 + (i >> 1)) * mv_stride) << (mv_sample_log2 - 1);
189 1684 int mx = motion_val[direction][xy][0];
190 1684 int my = motion_val[direction][xy][1];
191 1684 mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
192 }
193
2/2
✓ Branch 0 taken 43 times.
✓ Branch 1 taken 3271 times.
 3314 } else if (IS_16X8(mb_type)) {
194
2/2
✓ Branch 0 taken 86 times.
✓ Branch 1 taken 43 times.
 129 for (i = 0; i < 2; i++) {
195 86 int sx = mb_x * 16 + 8;
196 86 int sy = mb_y * 16 + 4 + 8 * i;
197 86 int xy = (mb_x * 2 + (mb_y * 2 + i) * mv_stride) << (mv_sample_log2 - 1);
198 86 int mx = motion_val[direction][xy][0];
199 86 int my = motion_val[direction][xy][1];
200
201
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 86 times.
 86 if (IS_INTERLACED(mb_type))
202 ✗ my *= 2;
203
204 86 mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
205 }
206
2/2
✓ Branch 0 taken 24 times.
✓ Branch 1 taken 3247 times.
 3271 } else if (IS_8X16(mb_type)) {
207
2/2
✓ Branch 0 taken 48 times.
✓ Branch 1 taken 24 times.
 72 for (i = 0; i < 2; i++) {
208 48 int sx = mb_x * 16 + 4 + 8 * i;
209 48 int sy = mb_y * 16 + 8;
210 48 int xy = (mb_x * 2 + i + mb_y * 2 * mv_stride) << (mv_sample_log2 - 1);
211 48 int mx = motion_val[direction][xy][0];
212 48 int my = motion_val[direction][xy][1];
213
214
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 48 times.
 48 if (IS_INTERLACED(mb_type))
215 ✗ my *= 2;
216
217 48 mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
218 }
219 } else {
220 3247 int sx = mb_x * 16 + 8;
221 3247 int sy = mb_y * 16 + 8;
222 3247 int xy = (mb_x + mb_y * mv_stride) << mv_sample_log2;
223 3247 int mx = motion_val[direction][xy][0];
224 3247 int my = motion_val[direction][xy][1];
225 3247 mbcount += add_mb(mvs + mbcount, mb_type, sx, sy, mx, my, scale, direction);
226 }
227 }
228 }
229 }
230
231
2/2
✓ Branch 0 taken 35 times.
✓ Branch 1 taken 34 times.
 69 if (mbcount) {
232 AVFrameSideData *sd;
233
234 35 av_log(avctx, AV_LOG_DEBUG, "Adding %d MVs info to frame %"PRId64"\n", mbcount, avctx->frame_num);
235 35 sd = av_frame_new_side_data(pict, AV_FRAME_DATA_MOTION_VECTORS, mbcount * sizeof(AVMotionVector));
236
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 35 times.
 35 if (!sd) {
237 ✗ av_freep(&mvs);
238 ✗ return;
239 }
240 35 memcpy(sd->data, mvs, mbcount * sizeof(AVMotionVector));
241 }
242
243 69 av_freep(&mvs);
244 }
245
246 /* TODO: export all the following to make them accessible for users (and filters) */
247
2/4
✓ Branch 0 taken 35589 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 35589 times.
 35589 if (avctx->hwaccel || !mbtype_table)
248 ✗ return;
249
250
251
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 35589 times.
 35589 if (avctx->debug & (FF_DEBUG_QP | FF_DEBUG_MB_TYPE)) {
252 int x,y;
253 AVBPrint buf;
254 int n;
255 int margin_left;
256 int x_step;
257
258 ✗ av_log(avctx, AV_LOG_DEBUG, "New frame, type: %c\n",
259 ✗ av_get_picture_type_char(pict->pict_type));
260
261 ✗ margin_left = 2;
262 ✗ n = mb_width << 4;
263 ✗ while ((n /= 10))
264 ✗ margin_left++;
265
266 ✗ av_bprint_init(&buf, 1, AV_BPRINT_SIZE_UNLIMITED);
267 ✗ av_bprint_chars(&buf, ' ', margin_left);
268
269 ✗ n = 0;
270 ✗ if (avctx->debug & FF_DEBUG_QP)
271 ✗ n += 2;
272 ✗ if (avctx->debug & FF_DEBUG_MB_TYPE)
273 ✗ n += 3;
274 ✗ x_step = (mb_width * 16 > 999) ? 8 : 4;
275 ✗ for (x = 0; x < mb_width; x += x_step)
276 ✗ av_bprintf(&buf, "%-*d", n * x_step, x << 4);
277
278 ✗ av_log(avctx, AV_LOG_DEBUG, "%s\n", buf.str);
279
280 ✗ for (y = 0; y < mb_height; y++) {
281 ✗ av_bprint_clear(&buf);
282 ✗ for (x = 0; x < mb_width; x++) {
283 ✗ if (x == 0)
284 ✗ av_bprintf(&buf, "%*d ", margin_left - 1, y << 4);
285 ✗ if (avctx->debug & FF_DEBUG_QP) {
286 ✗ av_bprintf(&buf, "%2d", qscale_table[x + y * mb_stride]);
287 }
288 ✗ if (avctx->debug & FF_DEBUG_MB_TYPE) {
289 ✗ int mb_type = mbtype_table[x + y * mb_stride];
290
291 ✗ av_bprintf(&buf, "%c%c%c",
292 ✗ get_type_mv_char(mb_type, mb_type_mv_flags),
293 ✗ get_segmentation_char(mb_type),
294 ✗ get_interlacement_char(mb_type));
295 }
296 }
297
298 ✗ av_log(avctx, AV_LOG_DEBUG, "%s\n", buf.str);
299 }
300 ✗ av_bprint_finalize(&buf, NULL);
301 }
302 }
303