FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/v210dec.c
Date: 2026-09-25 23:13:28
Exec Total Coverage
Lines: 86 120 71.7%
Functions: 5 5 100.0%
Branches: 34 78 43.6%
Line Branch Exec Source
1 /*
2 * V210 decoder
3 *
4 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #include "avcodec.h"
25 #include "codec_internal.h"
26 #include "v210dec.h"
27 #include "v210dec_init.h"
28 #include "libavutil/bswap.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mem.h"
33 #include "thread.h"
34
35 typedef struct ThreadData {
36 AVFrame *frame;
37 const uint8_t *buf;
38 int stride;
39 } ThreadData;
40
41 18 static av_cold int decode_init(AVCodecContext *avctx)
42 {
43 18 V210DecContext *s = avctx->priv_data;
44
45
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 18 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 18 if (s->custom_stride > 0 && s->custom_stride & 3) {
46 ✗ av_log(avctx, AV_LOG_ERROR, "custom_stride must be a multiple of 4\n");
47 ✗ return AVERROR(EINVAL);
48 }
49
50 18 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
51 18 avctx->bits_per_raw_sample = 10;
52
53 18 s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
54 18 s->aligned_input = 0;
55 18 ff_v210dec_init(s);
56
57 18 return 0;
58 }
59
60 90520 static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
61 void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
62 {
63 uint32_t val;
64 90520 int w = (FFMAX(0, width - 12) / 12) * 12;
65
66 90520 unpack_frame(src, y, u, v, w);
67
68 90520 y += w;
69 90520 u += w >> 1;
70 90520 v += w >> 1;
71 90520 src += (w << 1) / 3;
72
73
2/2
✓ Branch 0 taken 185160 times.
✓ Branch 1 taken 90520 times.
 275680 while (w < width - 5) {
74 185160 READ_PIXELS(u, y, v);
75 185160 READ_PIXELS(y, u, y);
76 185160 READ_PIXELS(v, y, u);
77 185160 READ_PIXELS(y, v, y);
78 185160 w += 6;
79 }
80
81
1/2
✓ Branch 0 taken 90520 times.
✗ Branch 1 not taken.
 90520 if (w++ < width) {
82 90520 READ_PIXELS(u, y, v);
83
84
1/2
✓ Branch 0 taken 90520 times.
✗ Branch 1 not taken.
 90520 if (w++ < width) {
85 90520 val = av_le2ne32(*src++);
86 90520 *y++ = val & 0x3FF;
87
88
2/2
✓ Branch 0 taken 89800 times.
✓ Branch 1 taken 720 times.
 90520 if (w++ < width) {
89 89800 *u++ = (val >> 10) & 0x3FF;
90 89800 *y++ = (val >> 20) & 0x3FF;
91 89800 val = av_le2ne32(*src++);
92 89800 *v++ = val & 0x3FF;
93
94
1/2
✓ Branch 0 taken 89800 times.
✗ Branch 1 not taken.
 89800 if (w++ < width) {
95 89800 *y++ = (val >> 10) & 0x3FF;
96
97
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 89800 times.
 89800 if (w++ < width) {
98 ✗ *u++ = (val >> 20) & 0x3FF;
99 ✗ val = av_le2ne32(*src++);
100 ✗ *y++ = val & 0x3FF;
101 ✗ *v++ = (val >> 10) & 0x3FF;
102
103 ✗ if (w++ < width)
104 ✗ *y++ = (val >> 20) & 0x3FF;
105 }
106 }
107 }
108 }
109 }
110 90520 }
111
112 401 static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
113 {
114 401 V210DecContext *s = avctx->priv_data;
115 401 ThreadData *td = arg;
116 401 AVFrame *frame = td->frame;
117 401 int stride = td->stride;
118 401 int slice_start = (avctx->height * jobnr) / s->thread_count;
119 401 int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
120 401 const uint8_t *psrc = td->buf + stride * slice_start;
121 401 int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
122 401 int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
123 401 int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
124
125
2/2
✓ Branch 0 taken 90520 times.
✓ Branch 1 taken 401 times.
 90921 for (int h = slice_start; h < slice_end; h++) {
126 90520 decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
127 90520 psrc += stride;
128 90520 py += frame->linesize[0] / 2;
129 90520 pu += frame->linesize[1] / 2;
130 90520 pv += frame->linesize[2] / 2;
131 }
132
133 401 return 0;
134 }
135
136 807 static int v210_stride(int width, int align) {
137 807 int aligned_width = ((width + align - 1) / align) * align;
138 807 return aligned_width * 8 / 3;
139 }
140
141 402 static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
142 int *got_frame, AVPacket *avpkt)
143 {
144 402 V210DecContext *s = avctx->priv_data;
145 ThreadData td;
146 int ret, stride, aligned_input;
147 402 const uint8_t *psrc = avpkt->data;
148
149
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 402 times.
 402 if (s->custom_stride )
150 ✗ stride = s->custom_stride > 0 ? s->custom_stride : 0;
151 else {
152 402 stride = v210_stride(avctx->width, 48);
153
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 401 times.
 402 if (avpkt->size < stride * avctx->height) {
154 int align;
155
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 1 times.
 4 for (align = 24; align >= 6; align >>= 1) {
156 3 int small_stride = v210_stride(avctx->width, align);
157
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
 3 if (avpkt->size == small_stride * avctx->height) {
158 ✗ stride = small_stride;
159 ✗ if (!s->stride_warning_shown)
160 ✗ av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
161 ✗ s->stride_warning_shown = 1;
162 ✗ break;
163 }
164 }
165
2/4
✓ Branch 0 taken 1 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 1 times.
 1 if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
166 ✗ stride = 0;
167 }
168 }
169
170
2/4
✓ Branch 0 taken 402 times.
✗ Branch 1 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 402 times.
 402 if (stride > 0 && stride < v210_stride(avctx->width, 6)) {
171 ✗ av_log(avctx, AV_LOG_ERROR, "custom_stride %d is smaller than one row\n", stride);
172 ✗ return AVERROR_INVALIDDATA;
173 }
174
175
1/6
✗ Branch 0 not taken.
✓ Branch 1 taken 402 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 402 if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
176 ✗ av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
177 ✗ return AVERROR_INVALIDDATA;
178 }
179
180
4/6
✓ Branch 0 taken 402 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 401 times.
✓ Branch 3 taken 1 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 401 times.
 402 if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
181 ✗ stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
182 1 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
183 1 return AVERROR_INVALIDDATA;
184 }
185
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 401 times.
 401 if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
186 ✗ && avpkt->size > 64
187 ✗ && AV_RN32(psrc) == AV_RN32("INFO")
188 ✗ && avpkt->size - 64 >= stride * avctx->height)
189 ✗ psrc += 64;
190
191
2/4
✓ Branch 0 taken 401 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 401 times.
✗ Branch 3 not taken.
 401 aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
192
2/2
✓ Branch 0 taken 9 times.
✓ Branch 1 taken 392 times.
 401 if (aligned_input != s->aligned_input) {
193 9 s->aligned_input = aligned_input;
194 9 ff_v210dec_init(s);
195 }
196
197
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 401 times.
 401 if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
198 ✗ return ret;
199
200
1/2
✓ Branch 0 taken 401 times.
✗ Branch 1 not taken.
 401 if (stride) {
201 401 td.stride = stride;
202 401 td.buf = psrc;
203 401 td.frame = pic;
204 401 avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
205 } else {
206 uint8_t *pointers[4];
207 int linesizes[4];
208 ✗ int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
209 ✗ if (ret < 0)
210 ✗ return ret;
211 ✗ decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame);
212 ✗ av_image_copy2(pic->data, pic->linesize, pointers, linesizes,
213 avctx->pix_fmt, avctx->width, avctx->height);
214 ✗ av_freep(&pointers[0]);
215 }
216
217
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 401 times.
 401 if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
218 /* we have interlaced material flagged in container */
219 ✗ pic->flags |= AV_FRAME_FLAG_INTERLACED;
220 ✗ if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
221 ✗ pic->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
222 }
223
224 401 *got_frame = 1;
225
226 401 return avpkt->size;
227 }
228
229 #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
230 static const AVOption v210dec_options[] = {
231 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
232 {.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
233 {NULL}
234 };
235
236 static const AVClass v210dec_class = {
237 .class_name = "V210 Decoder",
238 .item_name = av_default_item_name,
239 .option = v210dec_options,
240 .version = LIBAVUTIL_VERSION_INT,
241 };
242
243 const FFCodec ff_v210_decoder = {
244 .p.name = "v210",
245 CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
246 .p.type = AVMEDIA_TYPE_VIDEO,
247 .p.id = AV_CODEC_ID_V210,
248 .priv_data_size = sizeof(V210DecContext),
249 .init = decode_init,
250 FF_CODEC_DECODE_CB(decode_frame),
251 .p.capabilities = AV_CODEC_CAP_DR1 |
252 AV_CODEC_CAP_SLICE_THREADS |
253 AV_CODEC_CAP_FRAME_THREADS,
254 .p.priv_class = &v210dec_class,
255 };
256