FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/dpxenc.c
Date: 2026-01-16 07:34:38
Exec Total Coverage
Lines: 132 187 70.6%
Functions: 7 7 100.0%
Branches: 49 74 66.2%
Line Branch Exec Source
1 /*
2 * DPX (.dpx) image encoder
3 * Copyright (c) 2011 Peter Ross <pross@xvid.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/common.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/imgutils.h"
25 #include "avcodec.h"
26 #include "codec_internal.h"
27 #include "encode.h"
28 #include "version.h"
29 #include "dpx.h"
30
31 typedef struct DPXContext {
32 int big_endian;
33 int bits_per_component;
34 int num_components;
35 int descriptor;
36 int planar;
37 } DPXContext;
38
39 6 static av_cold int encode_init(AVCodecContext *avctx)
40 {
41 6 DPXContext *s = avctx->priv_data;
42 6 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
43
44 6 s->big_endian = !!(desc->flags & AV_PIX_FMT_FLAG_BE);
45 6 s->bits_per_component = desc->comp[0].depth;
46 6 s->num_components = desc->nb_components;
47
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 6 s->descriptor = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50;
48 6 s->planar = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
49
50
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 6 switch (avctx->pix_fmt) {
51 ✗ case AV_PIX_FMT_ABGR:
52 ✗ s->descriptor = 52;
53 ✗ break;
54 ✗ case AV_PIX_FMT_GRAY16BE:
55 case AV_PIX_FMT_GRAY16LE:
56 case AV_PIX_FMT_GRAY8:
57 ✗ s->descriptor = 6;
58 ✗ break;
59 4 case AV_PIX_FMT_GBRP10BE:
60 case AV_PIX_FMT_GBRP10LE:
61 case AV_PIX_FMT_GBRP12BE:
62 case AV_PIX_FMT_GBRP12LE:
63 case AV_PIX_FMT_RGB24:
64 case AV_PIX_FMT_RGBA64BE:
65 case AV_PIX_FMT_RGBA64LE:
66 case AV_PIX_FMT_RGBA:
67 4 break;
68 2 case AV_PIX_FMT_RGB48LE:
69 case AV_PIX_FMT_RGB48BE:
70
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 2 if (avctx->bits_per_raw_sample)
71 1 s->bits_per_component = avctx->bits_per_raw_sample;
72 2 break;
73 }
74
75 6 return 0;
76 }
77
78 3953898 static av_always_inline void write16_internal(int big_endian, void *p, int value)
79 {
80
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 3953898 if (big_endian) AV_WB16(p, value);
81 3953898 else AV_WL16(p, value);
82 3953898 }
83
84 2636634 static av_always_inline void write32_internal(int big_endian, void *p, int value)
85 {
86
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 2636634 if (big_endian) AV_WB32(p, value);
87 2636634 else AV_WL32(p, value);
88 2636634 }
89
90 #define write16(p, value) write16_internal(s->big_endian, p, value)
91 #define write32(p, value) write32_internal(s->big_endian, p, value)
92
93 13 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVFrame *pic,
94 uint8_t *dst)
95 {
96 13 DPXContext *s = avctx->priv_data;
97 13 const uint8_t *src = pic->data[0];
98 int x, y;
99
100
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 3757 for (y = 0; y < avctx->height; y++) {
101
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 1321632 for (x = 0; x < avctx->width; x++) {
102 int value;
103
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 1317888 if (s->big_endian) {
104 ✗ value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
105 ✗ | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
106 ✗ | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
107 } else {
108 1317888 value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
109 1317888 | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
110 1317888 | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
111 }
112 1317888 write32(dst, value);
113 1317888 dst += 4;
114 }
115 3744 src += pic->linesize[0];
116 }
117 13 }
118
119 13 static void encode_gbrp10(AVCodecContext *avctx, const AVFrame *pic, uint8_t *dst)
120 {
121 13 DPXContext *s = avctx->priv_data;
122 13 const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
123 int x, y, i;
124
125
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126
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 1321632 for (x = 0; x < avctx->width; x++) {
127 int value;
128
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 1317888 if (s->big_endian) {
129 ✗ value = (AV_RB16(src[0] + 2*x) << 12)
130 ✗ | (AV_RB16(src[1] + 2*x) << 2)
131 ✗ | ((unsigned)AV_RB16(src[2] + 2*x) << 22);
132 } else {
133 1317888 value = (AV_RL16(src[0] + 2*x) << 12)
134 1317888 | (AV_RL16(src[1] + 2*x) << 2)
135 1317888 | ((unsigned)AV_RL16(src[2] + 2*x) << 22);
136 }
137 1317888 write32(dst, value);
138 1317888 dst += 4;
139 }
140
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 14976 for (i = 0; i < 3; i++)
141 11232 src[i] += pic->linesize[i];
142 }
143 13 }
144
145 13 static void encode_gbrp12(AVCodecContext *avctx, const AVFrame *pic, uint8_t *dst)
146 {
147 13 DPXContext *s = avctx->priv_data;
148 13 const uint16_t *src[3] = {(uint16_t*)pic->data[0],
149 13 (uint16_t*)pic->data[1],
150 13 (uint16_t*)pic->data[2]};
151 int x, y, i, pad;
152 13 pad = avctx->width*6;
153 13 pad = (FFALIGN(pad, 4) - pad) >> 1;
154
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155
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156 uint16_t value[3];
157
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 1317888 if (s->big_endian) {
158 ✗ value[1] = AV_RB16(src[0] + x) << 4;
159 ✗ value[2] = AV_RB16(src[1] + x) << 4;
160 ✗ value[0] = AV_RB16(src[2] + x) << 4;
161 } else {
162 1317888 value[1] = AV_RL16(src[0] + x) << 4;
163 1317888 value[2] = AV_RL16(src[1] + x) << 4;
164 1317888 value[0] = AV_RL16(src[2] + x) << 4;
165 }
166
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 5271552 for (i = 0; i < 3; i++, dst += 2)
167 3953664 write16(dst, value[i]);
168 }
169
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 3744 for (i = 0; i < pad; i++, dst += 2)
170 ✗ AV_WN16(dst, 0);
171
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 14976 for (i = 0; i < 3; i++)
172 11232 src[i] += pic->linesize[i]/2;
173 }
174 13 }
175
176 78 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
177 const AVFrame *frame, int *got_packet)
178 {
179 78 DPXContext *s = avctx->priv_data;
180 int size, ret, need_align, len;
181 uint8_t *buf;
182 int color_trc, color_spec;
183
184 #define HEADER_SIZE 1664 /* DPX Generic header */
185
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 78 if (s->bits_per_component == 10)
186 26 size = avctx->height * avctx->width * 4;
187
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 52 else if (s->bits_per_component == 12) {
188 // 3 components, 12 bits put on 16 bits
189 13 len = avctx->width*6;
190 13 size = FFALIGN(len, 4);
191 13 need_align = size - len;
192 13 size *= avctx->height;
193 } else {
194 // N components, M bits
195 39 len = avctx->width * s->num_components * s->bits_per_component >> 3;
196 39 size = FFALIGN(len, 4);
197 39 need_align = size - len;
198 39 size *= avctx->height;
199 }
200
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 78 if ((ret = ff_get_encode_buffer(avctx, pkt, size + HEADER_SIZE, 0)) < 0)
201 ✗ return ret;
202 78 buf = pkt->data;
203
204 78 memset(buf, 0, HEADER_SIZE);
205
206 /* File information header */
207 78 write32(buf, MKBETAG('S','D','P','X'));
208 78 write32(buf + 4, HEADER_SIZE);
209 78 memcpy (buf + 8, "V1.0", 4);
210 78 write32(buf + 20, 1); /* new image */
211 78 write32(buf + 24, HEADER_SIZE);
212
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 78 if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
213 ✗ memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
214 78 write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
215
216 /* Image information header */
217 78 write16(buf + 768, 0); /* orientation; left to right, top to bottom */
218 78 write16(buf + 770, 1); /* number of elements */
219 78 write32(buf + 772, avctx->width);
220 78 write32(buf + 776, avctx->height);
221 78 buf[800] = s->descriptor;
222
223
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 78 switch (avctx->color_trc) {
224 ✗ case AVCOL_TRC_BT709:
225 ✗ color_trc = DPX_TRC_ITU_R_709_4;
226 ✗ break;
227 ✗ default:
228 ✗ av_log(avctx, AV_LOG_WARNING, "unsupported color transfer\n");
229 78 case AVCOL_TRC_UNSPECIFIED:
230 78 color_trc = DPX_TRC_UNSPECIFIED_VIDEO;
231 78 break;
232 ✗ case AVCOL_TRC_GAMMA28:
233 ✗ color_trc = DPX_TRC_ITU_R_624_4_PAL;
234 ✗ break;
235 ✗ case AVCOL_TRC_SMPTE170M:
236 ✗ color_trc = DPX_TRC_SMPTE_170;
237 ✗ break;
238 ✗ case AVCOL_TRC_LINEAR:
239 ✗ color_trc = DPX_TRC_LINEAR;
240 ✗ break;
241 }
242 78 buf[801] = color_trc;
243
244
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 78 switch (avctx->color_primaries) {
245 ✗ case AVCOL_PRI_BT709:
246 ✗ color_spec = DPX_COL_SPEC_ITU_R_709_4;
247 ✗ break;
248 ✗ default:
249 ✗ av_log(avctx, AV_LOG_WARNING, "unsupported colorimetric specification\n");
250 78 case AVCOL_PRI_UNSPECIFIED:
251 78 color_spec = DPX_COL_SPEC_UNSPECIFIED_VIDEO;
252 78 break;
253 ✗ case AVCOL_PRI_BT470BG:
254 ✗ color_spec = DPX_COL_SPEC_ITU_R_624_4_PAL;
255 ✗ break;
256 ✗ case AVCOL_PRI_SMPTE170M:
257 ✗ color_spec = DPX_COL_SPEC_SMPTE_170;
258 ✗ break;
259 }
260 78 buf[802] = color_spec;
261
262 78 buf[803] = s->bits_per_component;
263
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 78 write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
264 1 : 0); /* packing method */
265 78 write32(buf + 808, HEADER_SIZE); /* data offset */
266
267 /* Image source information header */
268 78 write32(buf + 1628, avctx->sample_aspect_ratio.num);
269 78 write32(buf + 1632, avctx->sample_aspect_ratio.den);
270
271
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 78 switch(s->bits_per_component) {
272 39 case 8:
273 case 16:
274
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 39 if (need_align) {
275 int j;
276 ✗ const uint8_t *src = frame->data[0];
277 ✗ uint8_t *dst = pkt->data + HEADER_SIZE;
278 ✗ size = (len + need_align) * avctx->height;
279 ✗ for (j=0; j<avctx->height; j++) {
280 ✗ memcpy(dst, src, len);
281 ✗ memset(dst + len, 0, need_align);
282 ✗ dst += len + need_align;
283 ✗ src += frame->linesize[0];
284 }
285 } else {
286 39 size = av_image_copy_to_buffer(buf + HEADER_SIZE, pkt->size - HEADER_SIZE,
287 39 (const uint8_t**)frame->data, frame->linesize,
288 avctx->pix_fmt,
289 avctx->width, avctx->height, 1);
290 }
291
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 39 if (size < 0)
292 ✗ return size;
293 39 break;
294 26 case 10:
295
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 26 if (s->planar)
296 13 encode_gbrp10(avctx, frame, buf + HEADER_SIZE);
297 else
298 13 encode_rgb48_10bit(avctx, frame, buf + HEADER_SIZE);
299 26 break;
300 13 case 12:
301 13 encode_gbrp12(avctx, frame, buf + HEADER_SIZE);
302 13 break;
303 ✗ default:
304 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
305 ✗ return -1;
306 }
307
308 78 size += HEADER_SIZE;
309
310 78 write32(buf + 16, size); /* file size */
311
312 78 *got_packet = 1;
313
314 78 return 0;
315 }
316
317 const FFCodec ff_dpx_encoder = {
318 .p.name = "dpx",
319 CODEC_LONG_NAME("DPX (Digital Picture Exchange) image"),
320 .p.type = AVMEDIA_TYPE_VIDEO,
321 .p.id = AV_CODEC_ID_DPX,
322 .p.capabilities = AV_CODEC_CAP_DR1,
323 .priv_data_size = sizeof(DPXContext),
324 .init = encode_init,
325 FF_CODEC_ENCODE_CB(encode_frame),
326 CODEC_PIXFMTS(AV_PIX_FMT_GRAY8,
327 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR,
328 AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
329 AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
330 AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
331 AV_PIX_FMT_GBRP10LE, AV_PIX_FMT_GBRP10BE,
332 AV_PIX_FMT_GBRP12LE, AV_PIX_FMT_GBRP12BE),
333 };
334