Libav
dpxenc.c
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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 Libav.
6  *
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.
11  *
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.
16  *
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
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 {
32 } DPXContext;
33 
35 {
36  DPXContext *s = avctx->priv_data;
37 
38 #if FF_API_CODED_FRAME
41  avctx->coded_frame->key_frame = 1;
43 #endif
44 
45  s->big_endian = 1;
46  s->bits_per_component = 8;
47  s->descriptor = 50; /* RGB */
48 
49  switch (avctx->pix_fmt) {
50  case AV_PIX_FMT_RGB24:
51  break;
52  case AV_PIX_FMT_RGBA:
53  s->descriptor = 51; /* RGBA */
54  break;
55  case AV_PIX_FMT_RGB48LE:
56  s->big_endian = 0;
57  /* fall-through */
58  case AV_PIX_FMT_RGB48BE:
60  break;
61  default:
62  av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
63  return -1;
64  }
65 
66  return 0;
67 }
68 
69 #define write16(p, value) \
70 do { \
71  if (s->big_endian) AV_WB16(p, value); \
72  else AV_WL16(p, value); \
73 } while(0)
74 
75 #define write32(p, value) \
76 do { \
77  if (s->big_endian) AV_WB32(p, value); \
78  else AV_WL32(p, value); \
79 } while(0)
80 
81 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVFrame *pic,
82  uint8_t *dst)
83 {
84  DPXContext *s = avctx->priv_data;
85  const uint8_t *src = pic->data[0];
86  int x, y;
87 
88  for (y = 0; y < avctx->height; y++) {
89  for (x = 0; x < avctx->width; x++) {
90  int value;
91  if ((avctx->pix_fmt & 1)) {
92  value = ((AV_RB16(src + 6*x + 4) & 0xFFC0) >> 4)
93  | ((AV_RB16(src + 6*x + 2) & 0xFFC0) << 6)
94  | ((AV_RB16(src + 6*x + 0) & 0xFFC0) << 16);
95  } else {
96  value = ((AV_RL16(src + 6*x + 4) & 0xFFC0) >> 4)
97  | ((AV_RL16(src + 6*x + 2) & 0xFFC0) << 6)
98  | ((AV_RL16(src + 6*x + 0) & 0xFFC0) << 16);
99  }
100  write32(dst, value);
101  dst += 4;
102  }
103  src += pic->linesize[0];
104  }
105 }
106 
107 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
108  const AVFrame *frame, int *got_packet)
109 {
110  DPXContext *s = avctx->priv_data;
111  int size, ret;
112  uint8_t *buf;
113 
114 #define HEADER_SIZE 1664 /* DPX Generic header */
115  if (s->bits_per_component == 10)
116  size = avctx->height * avctx->width * 4;
117  else
118  size = av_image_get_buffer_size(avctx->pix_fmt,
119  avctx->width, avctx->height, 1);
120  if ((ret = ff_alloc_packet(pkt, size + HEADER_SIZE)) < 0) {
121  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
122  return ret;
123  }
124  buf = pkt->data;
125 
126  memset(buf, 0, HEADER_SIZE);
127 
128  /* File information header */
129  write32(buf, MKBETAG('S','D','P','X'));
130  write32(buf + 4, HEADER_SIZE);
131  memcpy (buf + 8, "V1.0", 4);
132  write32(buf + 20, 1); /* new image */
133  write32(buf + 24, HEADER_SIZE);
134  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
135  memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
136  write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
137 
138  /* Image information header */
139  write16(buf + 768, 0); /* orientation; left to right, top to bottom */
140  write16(buf + 770, 1); /* number of elements */
141  write32(buf + 772, avctx->width);
142  write32(buf + 776, avctx->height);
143  buf[800] = s->descriptor;
144  buf[801] = 2; /* linear transfer */
145  buf[802] = 2; /* linear colorimetric */
146  buf[803] = s->bits_per_component;
147  write16(buf + 804, s->bits_per_component == 10 ? 1 : 0); /* packing method */
148  write32(buf + 808, HEADER_SIZE); /* data offset */
149 
150  /* Image source information header */
151  write32(buf + 1628, avctx->sample_aspect_ratio.num);
152  write32(buf + 1632, avctx->sample_aspect_ratio.den);
153 
154  switch (s->bits_per_component) {
155  case 8:
156  case 16:
158  pkt->size - HEADER_SIZE,
159  frame->data, frame->linesize,
160  avctx->pix_fmt,
161  avctx->width, avctx->height, 1);
162  if (size < 0)
163  return size;
164  break;
165  case 10:
166  encode_rgb48_10bit(avctx, frame, buf + HEADER_SIZE);
167  break;
168  default:
169  av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
170  return -1;
171  }
172 
173  size += HEADER_SIZE;
174 
175  write32(buf + 16, size); /* file size */
176 
177  pkt->flags |= AV_PKT_FLAG_KEY;
178  *got_packet = 1;
179 
180  return 0;
181 }
182 
184  .name = "dpx",
185  .long_name = NULL_IF_CONFIG_SMALL("DPX image"),
186  .type = AVMEDIA_TYPE_VIDEO,
187  .id = AV_CODEC_ID_DPX,
188  .priv_data_size = sizeof(DPXContext),
189  .init = encode_init,
190  .encode2 = encode_frame,
191  .pix_fmts = (const enum AVPixelFormat[]){
197 };
#define write32(p, value)
Definition: dpxenc.c:75
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
Definition: imgutils.c:345
static void encode_rgb48_10bit(AVCodecContext *avctx, const AVFrame *pic, uint8_t *dst)
Definition: dpxenc.c:81
int big_endian
Definition: dpxenc.c:29
misc image utilities
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:61
static av_cold int encode_init(AVCodecContext *avctx)
Definition: dpxenc.c:34
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1804
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
#define AV_RL16
Definition: intreadwrite.h:42
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2776
AVCodec.
Definition: avcodec.h:3120
uint8_t
#define av_cold
Definition: attributes.h:66
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:107
uint8_t * data
Definition: avcodec.h:1346
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1378
#define src
Definition: vp8dsp.c:254
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:323
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
#define HEADER_SIZE
#define AV_RB16
Definition: intreadwrite.h:53
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1503
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
int bits_per_component
Definition: dpxenc.c:30
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:90
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:788
#define FFMIN(a, b)
Definition: common.h:66
int width
picture width / height.
Definition: avcodec.h:1580
AVCodec ff_dpx_encoder
Definition: dpxenc.c:183
int ff_alloc_packet(AVPacket *avpkt, int size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1211
int descriptor
Definition: dpxenc.c:31
#define AV_LOG_INFO
Standard information.
Definition: log.h:135
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
main external API structure.
Definition: avcodec.h:1409
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:257
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:77
common internal api header.
common internal and external API header
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:106
#define write16(p, value)
Definition: dpxenc.c:69
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2797
int den
denominator
Definition: rational.h:45
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
#define MKBETAG(a, b, c, d)
Definition: common.h:257
void * priv_data
Definition: avcodec.h:1451
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: dpxenc.c:107
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:78
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:196
#define LIBAVCODEC_IDENT
Definition: version.h:42
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
This structure stores compressed data.
Definition: avcodec.h:1323