FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/v210dec.c
Date: 2022-07-04 00:18:54
Exec Total Coverage
Lines: 86 116 74.1%
Branches: 31 70 44.3%

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 "thread.h"
33
34 typedef struct ThreadData {
35 AVFrame *frame;
36 uint8_t *buf;
37 int stride;
38 } ThreadData;
39
40 18 static av_cold int decode_init(AVCodecContext *avctx)
41 {
42 18 V210DecContext *s = avctx->priv_data;
43
44 18 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
45 18 avctx->bits_per_raw_sample = 10;
46
47 18 s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
48 18 s->aligned_input = 0;
49 18 ff_v210dec_init(s);
50
51 18 return 0;
52 }
53
54 90520 static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
55 void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
56 {
57 uint32_t val;
58 90520 int w = (FFMAX(0, width - 12) / 12) * 12;
59
60 90520 unpack_frame(src, y, u, v, w);
61
62 90520 y += w;
63 90520 u += w >> 1;
64 90520 v += w >> 1;
65 90520 src += (w << 1) / 3;
66
67
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275680 while (w < width - 5) {
68 185160 READ_PIXELS(u, y, v);
69 185160 READ_PIXELS(y, u, y);
70 185160 READ_PIXELS(v, y, u);
71 185160 READ_PIXELS(y, v, y);
72 185160 w += 6;
73 }
74
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90520 if (w++ < width) {
76 90520 READ_PIXELS(u, y, v);
77
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90520 if (w++ < width) {
79 90520 val = av_le2ne32(*src++);
80 90520 *y++ = val & 0x3FF;
81
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90520 if (w++ < width) {
83 89800 *u++ = (val >> 10) & 0x3FF;
84 89800 *y++ = (val >> 20) & 0x3FF;
85 89800 val = av_le2ne32(*src++);
86 89800 *v++ = val & 0x3FF;
87
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89800 if (w++ < width) {
89 89800 *y++ = (val >> 10) & 0x3FF;
90
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89800 if (w++ < width) {
92 *u++ = (val >> 20) & 0x3FF;
93 val = av_le2ne32(*src++);
94 *y++ = val & 0x3FF;
95 *v++ = (val >> 10) & 0x3FF;
96
97 if (w++ < width)
98 *y++ = (val >> 20) & 0x3FF;
99 }
100 }
101 }
102 }
103 }
104 90520 }
105
106 401 static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
107 {
108 401 V210DecContext *s = avctx->priv_data;
109 401 ThreadData *td = arg;
110 401 AVFrame *frame = td->frame;
111 401 int stride = td->stride;
112 401 int slice_start = (avctx->height * jobnr) / s->thread_count;
113 401 int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
114 401 uint8_t *psrc = td->buf + stride * slice_start;
115 401 int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
116 401 int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
117 401 int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
118
119
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90921 for (int h = slice_start; h < slice_end; h++) {
120 90520 decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
121 90520 psrc += stride;
122 90520 py += frame->linesize[0] / 2;
123 90520 pu += frame->linesize[1] / 2;
124 90520 pv += frame->linesize[2] / 2;
125 }
126
127 401 return 0;
128 }
129
130 405 static int v210_stride(int width, int align) {
131 405 int aligned_width = ((width + align - 1) / align) * align;
132 405 return aligned_width * 8 / 3;
133 }
134
135 402 static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
136 int *got_frame, AVPacket *avpkt)
137 {
138 402 V210DecContext *s = avctx->priv_data;
139 ThreadData td;
140 int ret, stride, aligned_input;
141 402 const uint8_t *psrc = avpkt->data;
142
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402 if (s->custom_stride )
144 stride = s->custom_stride > 0 ? s->custom_stride : 0;
145 else {
146 402 stride = v210_stride(avctx->width, 48);
147
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402 if (avpkt->size < stride * avctx->height) {
148 int align;
149
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4 for (align = 24; align >= 6; align >>= 1) {
150 3 int small_stride = v210_stride(avctx->width, align);
151
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3 if (avpkt->size == small_stride * avctx->height) {
152 stride = small_stride;
153 if (!s->stride_warning_shown)
154 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
155 s->stride_warning_shown = 1;
156 break;
157 }
158 }
159
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1 if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
160 stride = 0;
161 }
162 }
163
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402 if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
165 av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
166 return AVERROR_INVALIDDATA;
167 }
168
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402 if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
170 stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
171 1 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
172 1 return AVERROR_INVALIDDATA;
173 }
174
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401 if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
175 && avpkt->size > 64
176 && AV_RN32(psrc) == AV_RN32("INFO")
177 && avpkt->size - 64 >= stride * avctx->height)
178 psrc += 64;
179
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401 aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
181
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401 if (aligned_input != s->aligned_input) {
182 9 s->aligned_input = aligned_input;
183 9 ff_v210dec_init(s);
184 }
185
186
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401 if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
187 return ret;
188
189 401 pic->pict_type = AV_PICTURE_TYPE_I;
190 401 pic->key_frame = 1;
191
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401 if (stride) {
193 401 td.stride = stride;
194 401 td.buf = (uint8_t*)psrc;
195 401 td.frame = pic;
196 401 avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
197 } else {
198 uint8_t *pointers[4];
199 int linesizes[4];
200 int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
201 if (ret < 0)
202 return ret;
203 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);
204 av_image_copy(pic->data, pic->linesize, (const uint8_t **)pointers, linesizes, avctx->pix_fmt, avctx->width, avctx->height);
205 av_freep(&pointers[0]);
206 }
207
208
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401 if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
209 /* we have interlaced material flagged in container */
210 pic->interlaced_frame = 1;
211 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
212 pic->top_field_first = 1;
213 }
214
215 401 *got_frame = 1;
216
217 401 return avpkt->size;
218 }
219
220 #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
221 static const AVOption v210dec_options[] = {
222 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
223 {.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
224 {NULL}
225 };
226
227 static const AVClass v210dec_class = {
228 .class_name = "V210 Decoder",
229 .item_name = av_default_item_name,
230 .option = v210dec_options,
231 .version = LIBAVUTIL_VERSION_INT,
232 };
233
234 const FFCodec ff_v210_decoder = {
235 .p.name = "v210",
236 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
237 .p.type = AVMEDIA_TYPE_VIDEO,
238 .p.id = AV_CODEC_ID_V210,
239 .priv_data_size = sizeof(V210DecContext),
240 .init = decode_init,
241 FF_CODEC_DECODE_CB(decode_frame),
242 .p.capabilities = AV_CODEC_CAP_DR1 |
243 AV_CODEC_CAP_SLICE_THREADS |
244 AV_CODEC_CAP_FRAME_THREADS,
245 .p.priv_class = &v210dec_class,
246 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
247 };
248