FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/v210dec.c
Date: 2021-09-22 05:58:22
Exec Total Coverage
Lines: 86 99 86.9%
Branches: 20 40 50.0%

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 "internal.h"
26 #include "v210dec.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/intreadwrite.h"
30 #include "thread.h"
31
32 #define READ_PIXELS(a, b, c) \
33 do { \
34 val = av_le2ne32(*src++); \
35 *a++ = val & 0x3FF; \
36 *b++ = (val >> 10) & 0x3FF; \
37 *c++ = (val >> 20) & 0x3FF; \
38 } while (0)
39
40 typedef struct ThreadData {
41 AVFrame *frame;
42 uint8_t *buf;
43 int stride;
44 } ThreadData;
45
46 90523 static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
47 {
48 uint32_t val;
49 int i;
50
51
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5268473 for( i = 0; i < width-5; i += 6 ){
52 5177950 READ_PIXELS(u, y, v);
53 5177950 READ_PIXELS(y, u, y);
54 5177950 READ_PIXELS(v, y, u);
55 5177950 READ_PIXELS(y, v, y);
56 }
57 90523 }
58
59 40 av_cold void ff_v210dec_init(V210DecContext *s)
60 {
61 40 s->unpack_frame = v210_planar_unpack_c;
62 if (ARCH_X86)
63 40 ff_v210_x86_init(s);
64 40 }
65
66 18 static av_cold int decode_init(AVCodecContext *avctx)
67 {
68 18 V210DecContext *s = avctx->priv_data;
69
70 18 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
71 18 avctx->bits_per_raw_sample = 10;
72
73 18 s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
74 18 s->aligned_input = 0;
75 18 ff_v210dec_init(s);
76
77 18 return 0;
78 }
79
80 401 static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
81 {
82 401 V210DecContext *s = avctx->priv_data;
83 int h, w;
84 401 ThreadData *td = arg;
85 401 AVFrame *frame = td->frame;
86 401 int stride = td->stride;
87 401 int slice_start = (avctx->height * jobnr) / s->thread_count;
88 401 int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
89 401 uint8_t *psrc = td->buf + stride * slice_start;
90 uint16_t *y, *u, *v;
91
92 401 y = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
93 401 u = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
94 401 v = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
95
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90921 for (h = slice_start; h < slice_end; h++) {
96 90520 const uint32_t *src = (const uint32_t*)psrc;
97 uint32_t val;
98
99 90520 w = (avctx->width / 12) * 12;
100 90520 s->unpack_frame(src, y, u, v, w);
101
102 90520 y += w;
103 90520 u += w >> 1;
104 90520 v += w >> 1;
105 90520 src += (w << 1) / 3;
106
107
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90520 if (w < avctx->width - 5) {
108 4120 READ_PIXELS(u, y, v);
109 4120 READ_PIXELS(y, u, y);
110 4120 READ_PIXELS(v, y, u);
111 4120 READ_PIXELS(y, v, y);
112 4120 w += 6;
113 }
114
115
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90520 if (w < avctx->width - 1) {
116 90520 READ_PIXELS(u, y, v);
117
118 90520 val = av_le2ne32(*src++);
119 90520 *y++ = val & 0x3FF;
120
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90520 if (w < avctx->width - 3) {
121 89800 *u++ = (val >> 10) & 0x3FF;
122 89800 *y++ = (val >> 20) & 0x3FF;
123
124 89800 val = av_le2ne32(*src++);
125 89800 *v++ = val & 0x3FF;
126 89800 *y++ = (val >> 10) & 0x3FF;
127 }
128 }
129
130 90520 psrc += stride;
131 90520 y += frame->linesize[0] / 2 - avctx->width + (avctx->width & 1);
132 90520 u += frame->linesize[1] / 2 - avctx->width / 2;
133 90520 v += frame->linesize[2] / 2 - avctx->width / 2;
134 }
135
136 401 return 0;
137 }
138
139 402 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
140 AVPacket *avpkt)
141 {
142 402 V210DecContext *s = avctx->priv_data;
143 ThreadData td;
144 int ret, stride, aligned_input;
145 402 ThreadFrame frame = { .f = data };
146 402 AVFrame *pic = data;
147 402 const uint8_t *psrc = avpkt->data;
148
149
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402 if (s->custom_stride )
150 stride = s->custom_stride;
151 else {
152 402 int aligned_width = ((avctx->width + 47) / 48) * 48;
153 402 stride = aligned_width * 8 / 3;
154 }
155
156
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402 if (avpkt->size < stride * avctx->height) {
157
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1 if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
158 stride = avpkt->size / avctx->height;
159 if (!s->stride_warning_shown)
160 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
161 s->stride_warning_shown = 1;
162 } else {
163 1 av_log(avctx, AV_LOG_ERROR, "packet too small\n");
164 1 return AVERROR_INVALIDDATA;
165 }
166 }
167 401 td.stride = stride;
168
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401 if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
169 && avpkt->size > 64
170 && AV_RN32(psrc) == AV_RN32("INFO")
171 && avpkt->size - 64 >= stride * avctx->height)
172 psrc += 64;
173
174
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401 aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
175
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401 if (aligned_input != s->aligned_input) {
176 9 s->aligned_input = aligned_input;
177 9 ff_v210dec_init(s);
178 }
179
180
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401 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
181 return ret;
182
183 401 pic->pict_type = AV_PICTURE_TYPE_I;
184 401 pic->key_frame = 1;
185
186 401 td.buf = (uint8_t*)psrc;
187 401 td.frame = pic;
188 401 avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
189
190
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401 if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
191 /* we have interlaced material flagged in container */
192 pic->interlaced_frame = 1;
193 if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
194 pic->top_field_first = 1;
195 }
196
197 401 *got_frame = 1;
198
199 401 return avpkt->size;
200 }
201
202 #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
203 static const AVOption v210dec_options[] = {
204 {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
205 {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
206 {NULL}
207 };
208
209 static const AVClass v210dec_class = {
210 .class_name = "V210 Decoder",
211 .item_name = av_default_item_name,
212 .option = v210dec_options,
213 .version = LIBAVUTIL_VERSION_INT,
214 };
215
216 const AVCodec ff_v210_decoder = {
217 .name = "v210",
218 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
219 .type = AVMEDIA_TYPE_VIDEO,
220 .id = AV_CODEC_ID_V210,
221 .priv_data_size = sizeof(V210DecContext),
222 .init = decode_init,
223 .decode = decode_frame,
224 .capabilities = AV_CODEC_CAP_DR1 |
225 AV_CODEC_CAP_SLICE_THREADS |
226 AV_CODEC_CAP_FRAME_THREADS,
227 .priv_class = &v210dec_class,
228 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
229 };
230