Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / dpxenc.c
CommitLineData
2ba45a60
DM
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
28typedef struct DPXContext {
29 int big_endian;
30 int bits_per_component;
31 int num_components;
32 int descriptor;
33 int planar;
34} DPXContext;
35
36static 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) \
79do { \
80 if (s->big_endian) AV_WB16(p, value); \
81 else AV_WL16(p, value); \
82} while(0)
83
84#define write32(p, value) \
85do { \
86 if (s->big_endian) AV_WB32(p, value); \
87 else AV_WL32(p, value); \
88} while(0)
89
90static 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
115static 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
141static 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
172static 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
274AVCodec 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};