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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 "internal.h" | |
27 | ||
28 | typedef struct DPXContext { | |
29 | int big_endian; | |
30 | int bits_per_component; | |
31 | int num_components; | |
32 | int descriptor; | |
33 | int planar; | |
34 | } DPXContext; | |
35 | ||
36 | static av_cold int encode_init(AVCodecContext *avctx) | |
37 | { | |
38 | DPXContext *s = avctx->priv_data; | |
39 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); | |
40 | ||
41 | s->big_endian = !!(desc->flags & AV_PIX_FMT_FLAG_BE); | |
42 | s->bits_per_component = desc->comp[0].depth_minus1 + 1; | |
43 | s->num_components = desc->nb_components; | |
44 | s->descriptor = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50; | |
45 | s->planar = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR); | |
46 | ||
47 | switch (avctx->pix_fmt) { | |
48 | case AV_PIX_FMT_ABGR: | |
49 | s->descriptor = 52; | |
50 | break; | |
51 | case AV_PIX_FMT_GRAY16BE: | |
52 | case AV_PIX_FMT_GRAY16LE: | |
53 | case AV_PIX_FMT_GRAY8: | |
54 | s->descriptor = 6; | |
55 | break; | |
56 | case AV_PIX_FMT_GBRP10BE: | |
57 | case AV_PIX_FMT_GBRP10LE: | |
58 | case AV_PIX_FMT_GBRP12BE: | |
59 | case AV_PIX_FMT_GBRP12LE: | |
60 | case AV_PIX_FMT_RGB24: | |
61 | case AV_PIX_FMT_RGBA64BE: | |
62 | case AV_PIX_FMT_RGBA64LE: | |
63 | case AV_PIX_FMT_RGBA: | |
64 | break; | |
65 | case AV_PIX_FMT_RGB48LE: | |
66 | case AV_PIX_FMT_RGB48BE: | |
67 | if (avctx->bits_per_raw_sample) | |
68 | s->bits_per_component = avctx->bits_per_raw_sample; | |
69 | break; | |
70 | default: | |
71 | av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n"); | |
72 | return -1; | |
73 | } | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | #define write16(p, value) \ | |
79 | do { \ | |
80 | if (s->big_endian) AV_WB16(p, value); \ | |
81 | else AV_WL16(p, value); \ | |
82 | } while(0) | |
83 | ||
84 | #define write32(p, value) \ | |
85 | do { \ | |
86 | if (s->big_endian) AV_WB32(p, value); \ | |
87 | else AV_WL32(p, value); \ | |
88 | } while(0) | |
89 | ||
90 | static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst) | |
91 | { | |
92 | DPXContext *s = avctx->priv_data; | |
93 | const uint8_t *src = pic->data[0]; | |
94 | int x, y; | |
95 | ||
96 | for (y = 0; y < avctx->height; y++) { | |
97 | for (x = 0; x < avctx->width; x++) { | |
98 | int value; | |
99 | if (s->big_endian) { | |
100 | value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4) | |
101 | | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6) | |
102 | | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16); | |
103 | } else { | |
104 | value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4) | |
105 | | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6) | |
106 | | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16); | |
107 | } | |
108 | write32(dst, value); | |
109 | dst += 4; | |
110 | } | |
111 | src += pic->linesize[0]; | |
112 | } | |
113 | } | |
114 | ||
115 | static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst) | |
116 | { | |
117 | DPXContext *s = avctx->priv_data; | |
118 | const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]}; | |
119 | int x, y, i; | |
120 | ||
121 | for (y = 0; y < avctx->height; y++) { | |
122 | for (x = 0; x < avctx->width; x++) { | |
123 | int value; | |
124 | if (s->big_endian) { | |
125 | value = (AV_RB16(src[0] + 2*x) << 12) | |
126 | | (AV_RB16(src[1] + 2*x) << 2) | |
127 | | ((unsigned)AV_RB16(src[2] + 2*x) << 22); | |
128 | } else { | |
129 | value = (AV_RL16(src[0] + 2*x) << 12) | |
130 | | (AV_RL16(src[1] + 2*x) << 2) | |
131 | | ((unsigned)AV_RL16(src[2] + 2*x) << 22); | |
132 | } | |
133 | write32(dst, value); | |
134 | dst += 4; | |
135 | } | |
136 | for (i = 0; i < 3; i++) | |
137 | src[i] += pic->linesize[i]; | |
138 | } | |
139 | } | |
140 | ||
141 | static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst) | |
142 | { | |
143 | DPXContext *s = avctx->priv_data; | |
144 | const uint16_t *src[3] = {(uint16_t*)pic->data[0], | |
145 | (uint16_t*)pic->data[1], | |
146 | (uint16_t*)pic->data[2]}; | |
147 | int x, y, i, pad; | |
148 | pad = avctx->width*6; | |
149 | pad = (FFALIGN(pad, 4) - pad) >> 1; | |
150 | for (y = 0; y < avctx->height; y++) { | |
151 | for (x = 0; x < avctx->width; x++) { | |
152 | uint16_t value[3]; | |
153 | if (s->big_endian) { | |
154 | value[1] = AV_RB16(src[0] + x) << 4; | |
155 | value[2] = AV_RB16(src[1] + x) << 4; | |
156 | value[0] = AV_RB16(src[2] + x) << 4; | |
157 | } else { | |
158 | value[1] = AV_RL16(src[0] + x) << 4; | |
159 | value[2] = AV_RL16(src[1] + x) << 4; | |
160 | value[0] = AV_RL16(src[2] + x) << 4; | |
161 | } | |
162 | for (i = 0; i < 3; i++) | |
163 | write16(dst++, value[i]); | |
164 | } | |
165 | for (i = 0; i < pad; i++) | |
166 | *dst++ = 0; | |
167 | for (i = 0; i < 3; i++) | |
168 | src[i] += pic->linesize[i]/2; | |
169 | } | |
170 | } | |
171 | ||
172 | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
173 | const AVFrame *frame, int *got_packet) | |
174 | { | |
175 | DPXContext *s = avctx->priv_data; | |
176 | int size, ret, need_align, len; | |
177 | uint8_t *buf; | |
178 | ||
179 | #define HEADER_SIZE 1664 /* DPX Generic header */ | |
180 | if (s->bits_per_component == 10) | |
181 | size = avctx->height * avctx->width * 4; | |
182 | else if (s->bits_per_component == 12) { | |
183 | // 3 components, 12 bits put on 16 bits | |
184 | len = avctx->width*6; | |
185 | size = FFALIGN(len, 4); | |
186 | need_align = size - len; | |
187 | size *= avctx->height; | |
188 | } else { | |
189 | // N components, M bits | |
190 | len = avctx->width * s->num_components * s->bits_per_component >> 3; | |
191 | size = FFALIGN(len, 4); | |
192 | need_align = size - len; | |
193 | size *= avctx->height; | |
194 | } | |
195 | if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE)) < 0) | |
196 | return ret; | |
197 | buf = pkt->data; | |
198 | ||
199 | memset(buf, 0, HEADER_SIZE); | |
200 | ||
201 | /* File information header */ | |
202 | write32(buf, MKBETAG('S','D','P','X')); | |
203 | write32(buf + 4, HEADER_SIZE); | |
204 | memcpy (buf + 8, "V1.0", 4); | |
205 | write32(buf + 20, 1); /* new image */ | |
206 | write32(buf + 24, HEADER_SIZE); | |
207 | if (!(avctx->flags & CODEC_FLAG_BITEXACT)) | |
208 | memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100)); | |
209 | write32(buf + 660, 0xFFFFFFFF); /* unencrypted */ | |
210 | ||
211 | /* Image information header */ | |
212 | write16(buf + 768, 0); /* orientation; left to right, top to bottom */ | |
213 | write16(buf + 770, 1); /* number of elements */ | |
214 | write32(buf + 772, avctx->width); | |
215 | write32(buf + 776, avctx->height); | |
216 | buf[800] = s->descriptor; | |
217 | buf[801] = 2; /* linear transfer */ | |
218 | buf[802] = 2; /* linear colorimetric */ | |
219 | buf[803] = s->bits_per_component; | |
220 | write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ? | |
221 | 1 : 0); /* packing method */ | |
222 | write32(buf + 808, HEADER_SIZE); /* data offset */ | |
223 | ||
224 | /* Image source information header */ | |
225 | write32(buf + 1628, avctx->sample_aspect_ratio.num); | |
226 | write32(buf + 1632, avctx->sample_aspect_ratio.den); | |
227 | ||
228 | switch(s->bits_per_component) { | |
229 | case 8: | |
230 | case 16: | |
231 | if (need_align) { | |
232 | int j; | |
233 | const uint8_t *src = frame->data[0]; | |
234 | uint8_t *dst = pkt->data + HEADER_SIZE; | |
235 | size = (len + need_align) * avctx->height; | |
236 | for (j=0; j<avctx->height; j++) { | |
237 | memcpy(dst, src, len); | |
238 | memset(dst + len, 0, need_align); | |
239 | dst += len + need_align; | |
240 | src += frame->linesize[0]; | |
241 | } | |
242 | } else { | |
243 | size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt, | |
244 | avctx->width, avctx->height, | |
245 | buf + HEADER_SIZE, pkt->size - HEADER_SIZE); | |
246 | } | |
247 | if (size < 0) | |
248 | return size; | |
249 | break; | |
250 | case 10: | |
251 | if (s->planar) | |
252 | encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE); | |
253 | else | |
254 | encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE); | |
255 | break; | |
256 | case 12: | |
257 | encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE)); | |
258 | break; | |
259 | default: | |
260 | av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component); | |
261 | return -1; | |
262 | } | |
263 | ||
264 | size += HEADER_SIZE; | |
265 | ||
266 | write32(buf + 16, size); /* file size */ | |
267 | ||
268 | pkt->flags |= AV_PKT_FLAG_KEY; | |
269 | *got_packet = 1; | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | AVCodec ff_dpx_encoder = { | |
275 | .name = "dpx", | |
276 | .long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"), | |
277 | .type = AVMEDIA_TYPE_VIDEO, | |
278 | .id = AV_CODEC_ID_DPX, | |
279 | .priv_data_size = sizeof(DPXContext), | |
280 | .init = encode_init, | |
281 | .encode2 = encode_frame, | |
282 | .pix_fmts = (const enum AVPixelFormat[]){ | |
283 | AV_PIX_FMT_GRAY8, | |
284 | AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, | |
285 | AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, | |
286 | AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE, | |
287 | AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE, | |
288 | AV_PIX_FMT_GBRP10LE, AV_PIX_FMT_GBRP10BE, | |
289 | AV_PIX_FMT_GBRP12LE, AV_PIX_FMT_GBRP12BE, | |
290 | AV_PIX_FMT_NONE}, | |
291 | }; |