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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 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 {
33  int planar;
34 } DPXContext;
35 
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;
53  case AV_PIX_FMT_GRAY8:
54  s->descriptor = 6;
55  break;
60  case AV_PIX_FMT_RGB24:
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)
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 static av_always_inline void write16_internal(int big_endian, void *p, int value)
79 {
80  if (big_endian) AV_WB16(p, value);
81  else AV_WL16(p, value);
82 }
83 
84 static av_always_inline void write32_internal(int big_endian, void *p, int value)
85 {
86  if (big_endian) AV_WB32(p, value);
87  else AV_WL32(p, value);
88 }
89 
90 #define write16(p, value) write16_internal(s->big_endian, p, value)
91 #define write32(p, value) write32_internal(s->big_endian, p, value)
92 
93 static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
94 {
95  DPXContext *s = avctx->priv_data;
96  const uint8_t *src = pic->data[0];
97  int x, y;
98 
99  for (y = 0; y < avctx->height; y++) {
100  for (x = 0; x < avctx->width; x++) {
101  int value;
102  if (s->big_endian) {
103  value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
104  | ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
105  | ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
106  } else {
107  value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
108  | ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
109  | ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
110  }
111  write32(dst, value);
112  dst += 4;
113  }
114  src += pic->linesize[0];
115  }
116 }
117 
118 static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
119 {
120  DPXContext *s = avctx->priv_data;
121  const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
122  int x, y, i;
123 
124  for (y = 0; y < avctx->height; y++) {
125  for (x = 0; x < avctx->width; x++) {
126  int value;
127  if (s->big_endian) {
128  value = (AV_RB16(src[0] + 2*x) << 12)
129  | (AV_RB16(src[1] + 2*x) << 2)
130  | ((unsigned)AV_RB16(src[2] + 2*x) << 22);
131  } else {
132  value = (AV_RL16(src[0] + 2*x) << 12)
133  | (AV_RL16(src[1] + 2*x) << 2)
134  | ((unsigned)AV_RL16(src[2] + 2*x) << 22);
135  }
136  write32(dst, value);
137  dst += 4;
138  }
139  for (i = 0; i < 3; i++)
140  src[i] += pic->linesize[i];
141  }
142 }
143 
144 static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
145 {
146  DPXContext *s = avctx->priv_data;
147  const uint16_t *src[3] = {(uint16_t*)pic->data[0],
148  (uint16_t*)pic->data[1],
149  (uint16_t*)pic->data[2]};
150  int x, y, i, pad;
151  pad = avctx->width*6;
152  pad = (FFALIGN(pad, 4) - pad) >> 1;
153  for (y = 0; y < avctx->height; y++) {
154  for (x = 0; x < avctx->width; x++) {
155  uint16_t value[3];
156  if (s->big_endian) {
157  value[1] = AV_RB16(src[0] + x) << 4;
158  value[2] = AV_RB16(src[1] + x) << 4;
159  value[0] = AV_RB16(src[2] + x) << 4;
160  } else {
161  value[1] = AV_RL16(src[0] + x) << 4;
162  value[2] = AV_RL16(src[1] + x) << 4;
163  value[0] = AV_RL16(src[2] + x) << 4;
164  }
165  for (i = 0; i < 3; i++)
166  write16(dst++, value[i]);
167  }
168  for (i = 0; i < pad; i++)
169  *dst++ = 0;
170  for (i = 0; i < 3; i++)
171  src[i] += pic->linesize[i]/2;
172  }
173 }
174 
176  const AVFrame *frame, int *got_packet)
177 {
178  DPXContext *s = avctx->priv_data;
179  int size, ret, need_align, len;
180  uint8_t *buf;
181 
182 #define HEADER_SIZE 1664 /* DPX Generic header */
183  if (s->bits_per_component == 10)
184  size = avctx->height * avctx->width * 4;
185  else if (s->bits_per_component == 12) {
186  // 3 components, 12 bits put on 16 bits
187  len = avctx->width*6;
188  size = FFALIGN(len, 4);
189  need_align = size - len;
190  size *= avctx->height;
191  } else {
192  // N components, M bits
193  len = avctx->width * s->num_components * s->bits_per_component >> 3;
194  size = FFALIGN(len, 4);
195  need_align = size - len;
196  size *= avctx->height;
197  }
198  if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE, 0)) < 0)
199  return ret;
200  buf = pkt->data;
201 
202  memset(buf, 0, HEADER_SIZE);
203 
204  /* File information header */
205  write32(buf, MKBETAG('S','D','P','X'));
206  write32(buf + 4, HEADER_SIZE);
207  memcpy (buf + 8, "V1.0", 4);
208  write32(buf + 20, 1); /* new image */
209  write32(buf + 24, HEADER_SIZE);
210  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT))
211  memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
212  write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
213 
214  /* Image information header */
215  write16(buf + 768, 0); /* orientation; left to right, top to bottom */
216  write16(buf + 770, 1); /* number of elements */
217  write32(buf + 772, avctx->width);
218  write32(buf + 776, avctx->height);
219  buf[800] = s->descriptor;
220  buf[801] = 2; /* linear transfer */
221  buf[802] = 2; /* linear colorimetric */
222  buf[803] = s->bits_per_component;
223  write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
224  1 : 0); /* packing method */
225  write32(buf + 808, HEADER_SIZE); /* data offset */
226 
227  /* Image source information header */
228  write32(buf + 1628, avctx->sample_aspect_ratio.num);
229  write32(buf + 1632, avctx->sample_aspect_ratio.den);
230 
231  switch(s->bits_per_component) {
232  case 8:
233  case 16:
234  if (need_align) {
235  int j;
236  const uint8_t *src = frame->data[0];
237  uint8_t *dst = pkt->data + HEADER_SIZE;
238  size = (len + need_align) * avctx->height;
239  for (j=0; j<avctx->height; j++) {
240  memcpy(dst, src, len);
241  memset(dst + len, 0, need_align);
242  dst += len + need_align;
243  src += frame->linesize[0];
244  }
245  } else {
246  size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
247  avctx->width, avctx->height,
248  buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
249  }
250  if (size < 0)
251  return size;
252  break;
253  case 10:
254  if (s->planar)
255  encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
256  else
257  encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
258  break;
259  case 12:
260  encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE));
261  break;
262  default:
263  av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
264  return -1;
265  }
266 
267  size += HEADER_SIZE;
268 
269  write32(buf + 16, size); /* file size */
270 
271  pkt->flags |= AV_PKT_FLAG_KEY;
272  *got_packet = 1;
273 
274  return 0;
275 }
276 
278  .name = "dpx",
279  .long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
280  .type = AVMEDIA_TYPE_VIDEO,
281  .id = AV_CODEC_ID_DPX,
282  .priv_data_size = sizeof(DPXContext),
283  .init = encode_init,
284  .encode2 = encode_frame,
285  .pix_fmts = (const enum AVPixelFormat[]){
294 };
const char * s
Definition: avisynth_c.h:631
#define write32(p, value)
Definition: dpxenc.c:91
int linesize[AV_NUM_DATA_POINTERS]
number of bytes per line
Definition: avcodec.h:3745
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int big_endian
Definition: dpxenc.c:29
misc image utilities
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold int encode_init(AVCodecContext *avctx)
Definition: dpxenc.c:36
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1423
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:1901
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1721
int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
Copy pixel data from an AVPicture into a buffer.
Definition: avpicture.c:41
planar GBR 4:4:4 36bpp, little-endian
Definition: pixfmt.h:296
static AVPacket pkt
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3002
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
Picture data structure.
Definition: avcodec.h:3743
planar GBR 4:4:4 36bpp, big-endian
Definition: pixfmt.h:295
AVCodec.
Definition: avcodec.h:3471
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define FFALIGN(x, a)
Definition: common.h:71
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:100
uint8_t
#define av_cold
Definition: attributes.h:74
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:156
static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
Definition: dpxenc.c:118
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:112
uint8_t * data[AV_NUM_DATA_POINTERS]
pointers to the image data planes
Definition: avcodec.h:3744
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:271
static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
Definition: dpxenc.c:144
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:96
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1422
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1468
int planar
Definition: dpxenc.c:33
#define U(x)
Definition: vp56_arith.h:37
uint16_t depth_minus1
Number of bits in the component minus 1.
Definition: pixdesc.h:57
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define HEADER_SIZE
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1596
const char * name
Name of the codec implementation.
Definition: avcodec.h:3478
int bits_per_component
Definition: dpxenc.c:30
Libavcodec external API header.
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:95
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1428
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:787
#define FFMIN(a, b)
Definition: common.h:66
float y
int width
picture width / height.
Definition: avcodec.h:1680
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
AVCodec ff_dpx_encoder
Definition: dpxenc.c:277
int descriptor
Definition: dpxenc.c:32
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AVS_Value src
Definition: avisynth_c.h:482
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
uint8_t flags
Definition: pixdesc.h:90
int num_components
Definition: dpxenc.c:31
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
planar GBR 4:4:4 30bpp, big-endian
Definition: pixfmt.h:191
main external API structure.
Definition: avcodec.h:1501
static av_always_inline void write32_internal(int big_endian, void *p, int value)
Definition: dpxenc.c:84
void * buf
Definition: avisynth_c.h:553
static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
Definition: dpxenc.c:93
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
Y , 16bpp, big-endian.
Definition: pixfmt.h:99
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1782
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
Y , 8bpp.
Definition: pixfmt.h:71
common internal api header.
common internal and external API header
static av_always_inline void write16_internal(int big_endian, void *p, int value)
Definition: dpxenc.c:78
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:111
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
#define write16(p, value)
Definition: dpxenc.c:90
int den
denominator
Definition: rational.h:45
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:111
#define MKBETAG(a, b, c, d)
Definition: common.h:316
void * priv_data
Definition: avcodec.h:1543
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: dpxenc.c:175
int len
Y , 16bpp, little-endian.
Definition: pixfmt.h:100
#define LIBAVCODEC_IDENT
Definition: version.h:43
#define av_always_inline
Definition: attributes.h:37
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1399
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:127
for(j=16;j >0;--j)
planar GBR 4:4:4 30bpp, little-endian
Definition: pixfmt.h:192
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:272
#define AV_WL32(p, v)
Definition: intreadwrite.h:426