2 * DPX (.dpx) image encoder
3 * Copyright (c) 2011 Peter Ross <pross@xvid.org>
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/common.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/imgutils.h"
28 typedef struct DPXContext {
31 int bits_per_component;
35 static av_cold int encode_init(AVCodecContext *avctx)
37 DPXContext *s = avctx->priv_data;
39 avctx->coded_frame = &s->picture;
40 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
41 avctx->coded_frame->key_frame = 1;
44 s->bits_per_component = 8;
45 s->descriptor = 50; /* RGB */
47 switch (avctx->pix_fmt) {
48 case AV_PIX_FMT_RGB24:
51 s->descriptor = 51; /* RGBA */
53 case AV_PIX_FMT_RGB48LE:
55 case AV_PIX_FMT_RGB48BE:
56 s->bits_per_component = avctx->bits_per_raw_sample ? avctx->bits_per_raw_sample : 16;
59 av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
66 #define write16(p, value) \
68 if (s->big_endian) AV_WB16(p, value); \
69 else AV_WL16(p, value); \
72 #define write32(p, value) \
74 if (s->big_endian) AV_WB32(p, value); \
75 else AV_WL32(p, value); \
78 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic,
81 DPXContext *s = avctx->priv_data;
82 const uint8_t *src = pic->data[0];
85 for (y = 0; y < avctx->height; y++) {
86 for (x = 0; x < avctx->width; x++) {
88 if ((avctx->pix_fmt & 1)) {
89 value = ((AV_RB16(src + 6*x + 4) & 0xFFC0) >> 4)
90 | ((AV_RB16(src + 6*x + 2) & 0xFFC0) << 6)
91 | ((AV_RB16(src + 6*x + 0) & 0xFFC0) << 16);
93 value = ((AV_RL16(src + 6*x + 4) & 0xFFC0) >> 4)
94 | ((AV_RL16(src + 6*x + 2) & 0xFFC0) << 6)
95 | ((AV_RL16(src + 6*x + 0) & 0xFFC0) << 16);
100 src += pic->linesize[0];
104 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
105 const AVFrame *frame, int *got_packet)
107 DPXContext *s = avctx->priv_data;
111 #define HEADER_SIZE 1664 /* DPX Generic header */
112 if (s->bits_per_component == 10)
113 size = avctx->height * avctx->width * 4;
115 size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
116 if ((ret = ff_alloc_packet(pkt, size + HEADER_SIZE)) < 0) {
117 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
122 memset(buf, 0, HEADER_SIZE);
124 /* File information header */
125 write32(buf, MKBETAG('S','D','P','X'));
126 write32(buf + 4, HEADER_SIZE);
127 memcpy (buf + 8, "V1.0", 4);
128 write32(buf + 20, 1); /* new image */
129 write32(buf + 24, HEADER_SIZE);
130 if (!(avctx->flags & CODEC_FLAG_BITEXACT))
131 memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
132 write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
134 /* Image information header */
135 write16(buf + 768, 0); /* orientation; left to right, top to bottom */
136 write16(buf + 770, 1); /* number of elements */
137 write32(buf + 772, avctx->width);
138 write32(buf + 776, avctx->height);
139 buf[800] = s->descriptor;
140 buf[801] = 2; /* linear transfer */
141 buf[802] = 2; /* linear colorimetric */
142 buf[803] = s->bits_per_component;
143 write16(buf + 804, s->bits_per_component == 10 ? 1 : 0); /* packing method */
145 /* Image source information header */
146 write32(buf + 1628, avctx->sample_aspect_ratio.num);
147 write32(buf + 1632, avctx->sample_aspect_ratio.den);
149 switch (s->bits_per_component) {
152 size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
153 avctx->width, avctx->height,
154 buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
159 encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
162 av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
168 write32(buf + 16, size); /* file size */
170 pkt->flags |= AV_PKT_FLAG_KEY;
176 AVCodec ff_dpx_encoder = {
178 .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
179 .type = AVMEDIA_TYPE_VIDEO,
180 .id = AV_CODEC_ID_DPX,
181 .priv_data_size = sizeof(DPXContext),
183 .encode2 = encode_frame,
184 .pix_fmts = (const enum AVPixelFormat[]){