FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/dpxenc.c
Date: 2026-05-03 13:33:45
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/attributes.h"
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/imgutils.h"
26 #include "avcodec.h"
27 #include "codec_internal.h"
28 #include "encode.h"
29 #include "version.h"
30 #include "dpx.h"
31
32 typedef struct DPXContext {
33 int big_endian;
34 int bits_per_component;
35 int num_components;
36 int descriptor;
37 int planar;
38 } DPXContext;
39
40 6 static av_cold int encode_init(AVCodecContext *avctx)
41 {
42 6 DPXContext *s = avctx->priv_data;
43 6 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
44
45 6 s->big_endian = !!(desc->flags & AV_PIX_FMT_FLAG_BE);
46 6 s->bits_per_component = desc->comp[0].depth;
47 6 s->num_components = desc->nb_components;
48
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 6 s->descriptor = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50;
49 6 s->planar = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
50
51
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 6 switch (avctx->pix_fmt) {
52 ✗ case AV_PIX_FMT_ABGR:
53 ✗ s->descriptor = 52;
54 ✗ break;
55 ✗ case AV_PIX_FMT_GRAY16BE:
56 case AV_PIX_FMT_GRAY16LE:
57 case AV_PIX_FMT_GRAY8:
58 ✗ s->descriptor = 6;
59 ✗ break;
60 4 case AV_PIX_FMT_GBRP10BE:
61 case AV_PIX_FMT_GBRP10LE:
62 case AV_PIX_FMT_GBRP12BE:
63 case AV_PIX_FMT_GBRP12LE:
64 case AV_PIX_FMT_RGB24:
65 case AV_PIX_FMT_RGBA64BE:
66 case AV_PIX_FMT_RGBA64LE:
67 case AV_PIX_FMT_RGBA:
68 4 break;
69 2 case AV_PIX_FMT_RGB48LE:
70 case AV_PIX_FMT_RGB48BE:
71
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 2 if (avctx->bits_per_raw_sample)
72 1 s->bits_per_component = avctx->bits_per_raw_sample;
73 2 break;
74 }
75
76 6 return 0;
77 }
78
79 3953898 static av_always_inline void write16_internal(int big_endian, void *p, int value)
80 {
81
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 3953898 if (big_endian) AV_WB16(p, value);
82 3953898 else AV_WL16(p, value);
83 3953898 }
84
85 2636634 static av_always_inline void write32_internal(int big_endian, void *p, int value)
86 {
87
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 2636634 if (big_endian) AV_WB32(p, value);
88 2636634 else AV_WL32(p, value);
89 2636634 }
90
91 #define write16(p, value) write16_internal(s->big_endian, p, value)
92 #define write32(p, value) write32_internal(s->big_endian, p, value)
93
94 13 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVFrame *pic,
95 uint8_t *dst)
96 {
97 13 DPXContext *s = avctx->priv_data;
98 13 const uint8_t *src = pic->data[0];
99 int x, y;
100
101
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 3757 for (y = 0; y < avctx->height; y++) {
102
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 1321632 for (x = 0; x < avctx->width; x++) {
103 int value;
104
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 1317888 if (s->big_endian) {
105 ✗ value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
106 ✗ | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
107 ✗ | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
108 } else {
109 1317888 value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
110 1317888 | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
111 1317888 | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
112 }
113 1317888 write32(dst, value);
114 1317888 dst += 4;
115 }
116 3744 src += pic->linesize[0];
117 }
118 13 }
119
120 13 static void encode_gbrp10(AVCodecContext *avctx, const AVFrame *pic, uint8_t *dst)
121 {
122 13 DPXContext *s = avctx->priv_data;
123 13 const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
124 int x, y, i;
125
126
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127
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 1321632 for (x = 0; x < avctx->width; x++) {
128 int value;
129
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 1317888 if (s->big_endian) {
130 ✗ value = (AV_RB16(src[0] + 2*x) << 12)
131 ✗ | (AV_RB16(src[1] + 2*x) << 2)
132 ✗ | ((unsigned)AV_RB16(src[2] + 2*x) << 22);
133 } else {
134 1317888 value = (AV_RL16(src[0] + 2*x) << 12)
135 1317888 | (AV_RL16(src[1] + 2*x) << 2)
136 1317888 | ((unsigned)AV_RL16(src[2] + 2*x) << 22);
137 }
138 1317888 write32(dst, value);
139 1317888 dst += 4;
140 }
141
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 14976 for (i = 0; i < 3; i++)
142 11232 src[i] += pic->linesize[i];
143 }
144 13 }
145
146 13 static void encode_gbrp12(AVCodecContext *avctx, const AVFrame *pic, uint8_t *dst)
147 {
148 13 DPXContext *s = avctx->priv_data;
149 13 const uint16_t *src[3] = {(uint16_t*)pic->data[0],
150 13 (uint16_t*)pic->data[1],
151 13 (uint16_t*)pic->data[2]};
152 int x, y, i, pad;
153 13 pad = avctx->width*6;
154 13 pad = (FFALIGN(pad, 4) - pad) >> 1;
155
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156
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157 uint16_t value[3];
158
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 1317888 if (s->big_endian) {
159 ✗ value[1] = AV_RB16(src[0] + x) << 4;
160 ✗ value[2] = AV_RB16(src[1] + x) << 4;
161 ✗ value[0] = AV_RB16(src[2] + x) << 4;
162 } else {
163 1317888 value[1] = AV_RL16(src[0] + x) << 4;
164 1317888 value[2] = AV_RL16(src[1] + x) << 4;
165 1317888 value[0] = AV_RL16(src[2] + x) << 4;
166 }
167
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 5271552 for (i = 0; i < 3; i++, dst += 2)
168 3953664 write16(dst, value[i]);
169 }
170
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 3744 for (i = 0; i < pad; i++, dst += 2)
171 ✗ AV_WN16(dst, 0);
172
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 14976 for (i = 0; i < 3; i++)
173 11232 src[i] += pic->linesize[i]/2;
174 }
175 13 }
176
177 78 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
178 const AVFrame *frame, int *got_packet)
179 {
180 78 DPXContext *s = avctx->priv_data;
181 int size, ret, need_align, len;
182 uint8_t *buf;
183 int color_trc, color_spec;
184
185 #define HEADER_SIZE 1664 /* DPX Generic header */
186
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 78 if (s->bits_per_component == 10)
187 26 size = avctx->height * avctx->width * 4;
188
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 52 else if (s->bits_per_component == 12) {
189 // 3 components, 12 bits put on 16 bits
190 13 len = avctx->width*6;
191 13 size = FFALIGN(len, 4);
192 13 need_align = size - len;
193 13 size *= avctx->height;
194 } else {
195 // N components, M bits
196 39 len = avctx->width * s->num_components * s->bits_per_component >> 3;
197 39 size = FFALIGN(len, 4);
198 39 need_align = size - len;
199 39 size *= avctx->height;
200 }
201
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 78 if ((ret = ff_get_encode_buffer(avctx, pkt, size + HEADER_SIZE, 0)) < 0)
202 ✗ return ret;
203 78 buf = pkt->data;
204
205 78 memset(buf, 0, HEADER_SIZE);
206
207 /* File information header */
208 78 write32(buf, MKBETAG('S','D','P','X'));
209 78 write32(buf + 4, HEADER_SIZE);
210 78 memcpy (buf + 8, "V1.0", 4);
211 78 write32(buf + 20, 1); /* new image */
212 78 write32(buf + 24, HEADER_SIZE);
213
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 78 if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
214 ✗ memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
215 78 write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
216
217 /* Image information header */
218 78 write16(buf + 768, 0); /* orientation; left to right, top to bottom */
219 78 write16(buf + 770, 1); /* number of elements */
220 78 write32(buf + 772, avctx->width);
221 78 write32(buf + 776, avctx->height);
222 78 buf[800] = s->descriptor;
223
224
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 78 switch (avctx->color_trc) {
225 ✗ case AVCOL_TRC_BT709:
226 ✗ color_trc = DPX_TRC_ITU_R_709_4;
227 ✗ break;
228 ✗ default:
229 ✗ av_log(avctx, AV_LOG_WARNING, "unsupported color transfer\n");
230 av_fallthrough;
231 78 case AVCOL_TRC_UNSPECIFIED:
232 78 color_trc = DPX_TRC_UNSPECIFIED_VIDEO;
233 78 break;
234 ✗ case AVCOL_TRC_GAMMA28:
235 ✗ color_trc = DPX_TRC_ITU_R_624_4_PAL;
236 ✗ break;
237 ✗ case AVCOL_TRC_SMPTE170M:
238 ✗ color_trc = DPX_TRC_SMPTE_170;
239 ✗ break;
240 ✗ case AVCOL_TRC_LINEAR:
241 ✗ color_trc = DPX_TRC_LINEAR;
242 ✗ break;
243 }
244 78 buf[801] = color_trc;
245
246
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 78 switch (avctx->color_primaries) {
247 ✗ case AVCOL_PRI_BT709:
248 ✗ color_spec = DPX_COL_SPEC_ITU_R_709_4;
249 ✗ break;
250 ✗ default:
251 ✗ av_log(avctx, AV_LOG_WARNING, "unsupported colorimetric specification\n");
252 av_fallthrough;
253 78 case AVCOL_PRI_UNSPECIFIED:
254 78 color_spec = DPX_COL_SPEC_UNSPECIFIED_VIDEO;
255 78 break;
256 ✗ case AVCOL_PRI_BT470BG:
257 ✗ color_spec = DPX_COL_SPEC_ITU_R_624_4_PAL;
258 ✗ break;
259 ✗ case AVCOL_PRI_SMPTE170M:
260 ✗ color_spec = DPX_COL_SPEC_SMPTE_170;
261 ✗ break;
262 }
263 78 buf[802] = color_spec;
264
265 78 buf[803] = s->bits_per_component;
266
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 78 write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
267 1 : 0); /* packing method */
268 78 write32(buf + 808, HEADER_SIZE); /* data offset */
269
270 /* Image source information header */
271 78 write32(buf + 1628, avctx->sample_aspect_ratio.num);
272 78 write32(buf + 1632, avctx->sample_aspect_ratio.den);
273
274
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 78 switch(s->bits_per_component) {
275 39 case 8:
276 case 16:
277
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 39 if (need_align) {
278 int j;
279 ✗ const uint8_t *src = frame->data[0];
280 ✗ uint8_t *dst = pkt->data + HEADER_SIZE;
281 ✗ size = (len + need_align) * avctx->height;
282 ✗ for (j=0; j<avctx->height; j++) {
283 ✗ memcpy(dst, src, len);
284 ✗ memset(dst + len, 0, need_align);
285 ✗ dst += len + need_align;
286 ✗ src += frame->linesize[0];
287 }
288 } else {
289 39 size = av_image_copy_to_buffer(buf + HEADER_SIZE, pkt->size - HEADER_SIZE,
290 39 (const uint8_t**)frame->data, frame->linesize,
291 avctx->pix_fmt,
292 avctx->width, avctx->height, 1);
293 }
294
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 39 if (size < 0)
295 ✗ return size;
296 39 break;
297 26 case 10:
298
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 26 if (s->planar)
299 13 encode_gbrp10(avctx, frame, buf + HEADER_SIZE);
300 else
301 13 encode_rgb48_10bit(avctx, frame, buf + HEADER_SIZE);
302 26 break;
303 13 case 12:
304 13 encode_gbrp12(avctx, frame, buf + HEADER_SIZE);
305 13 break;
306 ✗ default:
307 ✗ av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
308 ✗ return -1;
309 }
310
311 78 size += HEADER_SIZE;
312
313 78 write32(buf + 16, size); /* file size */
314
315 78 *got_packet = 1;
316
317 78 return 0;
318 }
319
320 const FFCodec ff_dpx_encoder = {
321 .p.name = "dpx",
322 CODEC_LONG_NAME("DPX (Digital Picture Exchange) image"),
323 .p.type = AVMEDIA_TYPE_VIDEO,
324 .p.id = AV_CODEC_ID_DPX,
325 .p.capabilities = AV_CODEC_CAP_DR1,
326 .priv_data_size = sizeof(DPXContext),
327 .init = encode_init,
328 FF_CODEC_ENCODE_CB(encode_frame),
329 CODEC_PIXFMTS(AV_PIX_FMT_GRAY8,
330 AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR,
331 AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
332 AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
333 AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
334 AV_PIX_FMT_GBRP10LE, AV_PIX_FMT_GBRP10BE,
335 AV_PIX_FMT_GBRP12LE, AV_PIX_FMT_GBRP12BE),
336 };
337