FFmpeg
pnmenc.c
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1 /*
2  * PNM image format
3  * Copyright (c) 2002, 2003 Fabrice Bellard
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 "config_components.h"
23 
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "avcodec.h"
28 #include "codec_internal.h"
29 #include "encode.h"
30 #include "float2half.h"
31 
32 typedef struct PHMEncContext {
33  uint16_t basetable[512];
34  uint8_t shifttable[512];
36 
38  const AVFrame *p, int *got_packet)
39 {
40  PHMEncContext *s = avctx->priv_data;
41  uint8_t *bytestream, *bytestream_start, *bytestream_end;
42  int i, h, h1, c, n, linesize, ret;
44  avctx->width, avctx->height, 1);
45 
46  if ((ret = ff_get_encode_buffer(avctx, pkt, size + 200, 0)) < 0)
47  return ret;
48 
49  bytestream_start =
50  bytestream = pkt->data;
51  bytestream_end = pkt->data + pkt->size;
52 
53  h = avctx->height;
54  h1 = h;
55  switch (avctx->pix_fmt) {
57  c = '4';
58  n = (avctx->width + 7) >> 3;
59  break;
60  case AV_PIX_FMT_GRAY8:
61  c = '5';
62  n = avctx->width;
63  break;
65  c = '5';
66  n = avctx->width * 2;
67  break;
68  case AV_PIX_FMT_RGB24:
69  c = '6';
70  n = avctx->width * 3;
71  break;
72  case AV_PIX_FMT_RGB48BE:
73  c = '6';
74  n = avctx->width * 6;
75  break;
76  case AV_PIX_FMT_YUV420P:
77  if (avctx->width & 1 || avctx->height & 1) {
78  av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
79  return AVERROR(EINVAL);
80  }
81  c = '5';
82  n = avctx->width;
83  h1 = (h * 3) / 2;
84  break;
86  c = '5';
87  n = avctx->width * 2;
88  h1 = (h * 3) / 2;
89  break;
92  if (avctx->codec_id == AV_CODEC_ID_PFM) {
93  c = 'F';
94  n = avctx->width * 4;
95  } else {
96  c = 'H';
97  n = avctx->width * 2;
98  }
99  break;
102  if (avctx->codec_id == AV_CODEC_ID_PFM) {
103  c = 'f';
104  n = avctx->width * 4;
105  } else {
106  c = 'h';
107  n = avctx->width * 2;
108  }
109  break;
110  default:
111  return -1;
112  }
113  snprintf(bytestream, bytestream_end - bytestream,
114  "P%c\n%d %d\n", c, avctx->width, h1);
115  bytestream += strlen(bytestream);
116  if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32LE ||
117  avctx->pix_fmt == AV_PIX_FMT_GRAYF32LE ||
118  avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ||
119  avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE)
120  snprintf(bytestream, bytestream_end - bytestream,
121  "%f\n", (avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE ||
122  avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE) ? 1.f: -1.f);
123  bytestream += strlen(bytestream);
124  if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE &&
125  avctx->pix_fmt != AV_PIX_FMT_GBRPF32LE &&
126  avctx->pix_fmt != AV_PIX_FMT_GRAYF32LE &&
127  avctx->pix_fmt != AV_PIX_FMT_GBRPF32BE &&
128  avctx->pix_fmt != AV_PIX_FMT_GRAYF32BE) {
129  int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
130  snprintf(bytestream, bytestream_end - bytestream,
131  "%d\n", maxdepth);
132  bytestream += strlen(bytestream);
133  }
134 
135  if ((avctx->pix_fmt == AV_PIX_FMT_GBRPF32LE ||
136  avctx->pix_fmt == AV_PIX_FMT_GBRPF32BE) && c == 'F') {
137  const float *r = (const float *)p->data[2];
138  const float *g = (const float *)p->data[0];
139  const float *b = (const float *)p->data[1];
140 
141  for (int i = 0; i < avctx->height; i++) {
142  for (int j = 0; j < avctx->width; j++) {
143  AV_WN32(bytestream + 0, av_float2int(r[j]));
144  AV_WN32(bytestream + 4, av_float2int(g[j]));
145  AV_WN32(bytestream + 8, av_float2int(b[j]));
146  bytestream += 12;
147  }
148 
149  r += p->linesize[2] / 4;
150  g += p->linesize[0] / 4;
151  b += p->linesize[1] / 4;
152  }
153  } else if ((avctx->pix_fmt == AV_PIX_FMT_GRAYF32LE ||
154  avctx->pix_fmt == AV_PIX_FMT_GRAYF32BE) && c == 'f') {
155  const float *g = (const float *)p->data[0];
156 
157  for (int i = 0; i < avctx->height; i++) {
158  for (int j = 0; j < avctx->width; j++) {
159  AV_WN32(bytestream, av_float2int(g[j]));
160  bytestream += 4;
161  }
162 
163  g += p->linesize[0] / 4;
164  }
165  } else if (avctx->pix_fmt == AV_PIX_FMT_GBRPF32 && c == 'H') {
166  const float *r = (const float *)p->data[2];
167  const float *g = (const float *)p->data[0];
168  const float *b = (const float *)p->data[1];
169 
170  for (int i = 0; i < avctx->height; i++) {
171  for (int j = 0; j < avctx->width; j++) {
172  AV_WN16(bytestream + 0, float2half(av_float2int(r[j]), s->basetable, s->shifttable));
173  AV_WN16(bytestream + 2, float2half(av_float2int(g[j]), s->basetable, s->shifttable));
174  AV_WN16(bytestream + 4, float2half(av_float2int(b[j]), s->basetable, s->shifttable));
175  bytestream += 6;
176  }
177 
178  r += p->linesize[2] / 4;
179  g += p->linesize[0] / 4;
180  b += p->linesize[1] / 4;
181  }
182  } else if (avctx->pix_fmt == AV_PIX_FMT_GRAYF32 && c == 'h') {
183  const float *g = (const float *)p->data[0];
184 
185  for (int i = 0; i < avctx->height; i++) {
186  for (int j = 0; j < avctx->width; j++) {
187  AV_WN16(bytestream, float2half(av_float2int(g[j]), s->basetable, s->shifttable));
188  bytestream += 2;
189  }
190 
191  g += p->linesize[0] / 4;
192  }
193  } else {
194  const uint8_t *ptr = p->data[0];
195  linesize = p->linesize[0];
196  for (i = 0; i < h; i++) {
197  memcpy(bytestream, ptr, n);
198  bytestream += n;
199  ptr += linesize;
200  }
201  }
202 
203  if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
204  const uint8_t *ptr1 = p->data[1], *ptr2 = p->data[2];
205  h >>= 1;
206  n >>= 1;
207  for (i = 0; i < h; i++) {
208  memcpy(bytestream, ptr1, n);
209  bytestream += n;
210  memcpy(bytestream, ptr2, n);
211  bytestream += n;
212  ptr1 += p->linesize[1];
213  ptr2 += p->linesize[2];
214  }
215  }
216  av_shrink_packet(pkt, bytestream - bytestream_start);
217  *got_packet = 1;
218 
219  return 0;
220 }
221 
222 #if CONFIG_PGM_ENCODER
223 const FFCodec ff_pgm_encoder = {
224  .p.name = "pgm",
225  .p.long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
226  .p.type = AVMEDIA_TYPE_VIDEO,
227  .p.id = AV_CODEC_ID_PGM,
228  .p.capabilities = AV_CODEC_CAP_DR1,
230  .p.pix_fmts = (const enum AVPixelFormat[]){
232  },
233 };
234 #endif
235 
236 #if CONFIG_PGMYUV_ENCODER
237 const FFCodec ff_pgmyuv_encoder = {
238  .p.name = "pgmyuv",
239  .p.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
240  .p.type = AVMEDIA_TYPE_VIDEO,
241  .p.id = AV_CODEC_ID_PGMYUV,
242  .p.capabilities = AV_CODEC_CAP_DR1,
244  .p.pix_fmts = (const enum AVPixelFormat[]){
246  },
247 };
248 #endif
249 
250 #if CONFIG_PPM_ENCODER
251 const FFCodec ff_ppm_encoder = {
252  .p.name = "ppm",
253  .p.long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
254  .p.type = AVMEDIA_TYPE_VIDEO,
255  .p.id = AV_CODEC_ID_PPM,
256  .p.capabilities = AV_CODEC_CAP_DR1,
258  .p.pix_fmts = (const enum AVPixelFormat[]){
260  },
261 };
262 #endif
263 
264 #if CONFIG_PBM_ENCODER
265 const FFCodec ff_pbm_encoder = {
266  .p.name = "pbm",
267  .p.long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
268  .p.type = AVMEDIA_TYPE_VIDEO,
269  .p.id = AV_CODEC_ID_PBM,
270  .p.capabilities = AV_CODEC_CAP_DR1,
272  .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
273  AV_PIX_FMT_NONE },
274 };
275 #endif
276 
277 #if CONFIG_PFM_ENCODER
278 const FFCodec ff_pfm_encoder = {
279  .p.name = "pfm",
280  .p.long_name = NULL_IF_CONFIG_SMALL("PFM (Portable FloatMap) image"),
281  .p.type = AVMEDIA_TYPE_VIDEO,
282  .p.id = AV_CODEC_ID_PFM,
283  .p.capabilities = AV_CODEC_CAP_DR1,
285  .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32LE,
289  AV_PIX_FMT_NONE },
290 };
291 #endif
292 
293 #if CONFIG_PHM_ENCODER
294 static av_cold int phm_enc_init(AVCodecContext *avctx)
295 {
296  PHMEncContext *s = avctx->priv_data;
297 
298  float2half_tables(s->basetable, s->shifttable);
299 
300  return 0;
301 }
302 
303 const FFCodec ff_phm_encoder = {
304  .p.name = "phm",
305  .p.long_name = NULL_IF_CONFIG_SMALL("PHM (Portable HalfFloatMap) image"),
306  .p.type = AVMEDIA_TYPE_VIDEO,
307  .p.id = AV_CODEC_ID_PHM,
308  .p.capabilities = AV_CODEC_CAP_DR1,
309  .priv_data_size = sizeof(PHMEncContext),
310  .init = phm_enc_init,
312  .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_GBRPF32,
314  AV_PIX_FMT_NONE },
315 };
316 #endif
ff_pbm_encoder
const FFCodec ff_pbm_encoder
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
r
const char * r
Definition: vf_curves.c:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
AV_CODEC_ID_PBM
@ AV_CODEC_ID_PBM
Definition: codec_id.h:113
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2675
AV_CODEC_ID_PFM
@ AV_CODEC_ID_PFM
Definition: codec_id.h:302
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
pixdesc.h
AV_PIX_FMT_GBRPF32BE
@ AV_PIX_FMT_GBRPF32BE
IEEE-754 single precision planar GBR 4:4:4, 96bpp, big-endian.
Definition: pixfmt.h:310
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CODEC_ID_PPM
@ AV_CODEC_ID_PPM
Definition: codec_id.h:112
AVComponentDescriptor::depth
int depth
Number of bits in the component.
Definition: pixdesc.h:57
encode.h
b
#define b
Definition: input.c:34
AV_CODEC_ID_PGM
@ AV_CODEC_ID_PGM
Definition: codec_id.h:114
AV_PIX_FMT_MONOWHITE
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:75
FFCodec
Definition: codec_internal.h:118
av_float2int
static av_always_inline uint32_t av_float2int(float f)
Reinterpret a float as a 32-bit integer.
Definition: intfloat.h:50
AV_PIX_FMT_GRAYF32LE
@ AV_PIX_FMT_GRAYF32LE
IEEE-754 single precision Y, 32bpp, little-endian.
Definition: pixfmt.h:333
AV_CODEC_ID_PHM
@ AV_CODEC_ID_PHM
Definition: codec_id.h:314
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
init
static int init
Definition: av_tx.c:47
AV_PIX_FMT_GRAY16BE
@ AV_PIX_FMT_GRAY16BE
Y , 16bpp, big-endian.
Definition: pixfmt.h:97
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:122
av_shrink_packet
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:112
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:269
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
g
const char * g
Definition: vf_curves.c:117
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
AV_PIX_FMT_GRAYF32
#define AV_PIX_FMT_GRAYF32
Definition: pixfmt.h:440
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:408
PHMEncContext
Definition: pnmenc.c:32
ff_pfm_encoder
const FFCodec ff_pfm_encoder
AV_CODEC_ID_PGMYUV
@ AV_CODEC_ID_PGMYUV
Definition: codec_id.h:115
float2half
static uint16_t float2half(uint32_t f, uint16_t *basetable, uint8_t *shifttable)
Definition: float2half.h:58
ff_phm_encoder
const FFCodec ff_phm_encoder
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
ff_ppm_encoder
const FFCodec ff_ppm_encoder
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
codec_internal.h
AV_WN32
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:425
AV_PIX_FMT_GBRPF32
#define AV_PIX_FMT_GBRPF32
Definition: pixfmt.h:437
size
int size
Definition: twinvq_data.h:10344
ff_pgmyuv_encoder
const FFCodec ff_pgmyuv_encoder
av_image_get_buffer_size
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:466
AV_PIX_FMT_RGB48BE
@ AV_PIX_FMT_RGB48BE
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:102
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
PHMEncContext::basetable
uint16_t basetable[512]
Definition: pnmenc.c:33
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
AVCodecContext::height
int height
Definition: avcodec.h:571
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:608
AV_PIX_FMT_GBRPF32LE
@ AV_PIX_FMT_GBRPF32LE
IEEE-754 single precision planar GBR 4:4:4, 96bpp, little-endian.
Definition: pixfmt.h:311
float2half_tables
static void float2half_tables(uint16_t *basetable, uint8_t *shifttable)
Definition: float2half.h:24
avcodec.h
ff_pgm_encoder
const FFCodec ff_pgm_encoder
ret
ret
Definition: filter_design.txt:187
AV_PIX_FMT_GRAYF32BE
@ AV_PIX_FMT_GRAYF32BE
IEEE-754 single precision Y, 32bpp, big-endian.
Definition: pixfmt.h:332
AVCodecContext
main external API structure.
Definition: avcodec.h:398
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:79
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:105
AV_PIX_FMT_YUV420P16BE
@ AV_PIX_FMT_YUV420P16BE
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:122
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
PHMEncContext::shifttable
uint8_t shifttable[512]
Definition: pnmenc.c:34
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:425
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:571
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
pnm_encode_frame
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *p, int *got_packet)
Definition: pnmenc.c:37
h
h
Definition: vp9dsp_template.c:2038
snprintf
#define snprintf
Definition: snprintf.h:34
float2half.h
AV_WN16
#define AV_WN16(p, v)
Definition: intreadwrite.h:372