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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 "libavutil/imgutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "avcodec.h"
25 #include "internal.h"
26 
28  const AVFrame *p, int *got_packet)
29 {
30  uint8_t *bytestream, *bytestream_start, *bytestream_end;
31  int i, h, h1, c, n, linesize, ret;
32  uint8_t *ptr, *ptr1, *ptr2;
34  avctx->width, avctx->height, 1);
35 
36  if ((ret = ff_alloc_packet2(avctx, pkt, size + 200, 0)) < 0)
37  return ret;
38 
39  bytestream_start =
40  bytestream = pkt->data;
41  bytestream_end = pkt->data + pkt->size;
42 
43  h = avctx->height;
44  h1 = h;
45  switch (avctx->pix_fmt) {
47  c = '4';
48  n = (avctx->width + 7) >> 3;
49  break;
50  case AV_PIX_FMT_GRAY8:
51  c = '5';
52  n = avctx->width;
53  break;
55  c = '5';
56  n = avctx->width * 2;
57  break;
58  case AV_PIX_FMT_RGB24:
59  c = '6';
60  n = avctx->width * 3;
61  break;
62  case AV_PIX_FMT_RGB48BE:
63  c = '6';
64  n = avctx->width * 6;
65  break;
66  case AV_PIX_FMT_YUV420P:
67  if (avctx->width & 1 || avctx->height & 1) {
68  av_log(avctx, AV_LOG_ERROR, "pgmyuv needs even width and height\n");
69  return AVERROR(EINVAL);
70  }
71  c = '5';
72  n = avctx->width;
73  h1 = (h * 3) / 2;
74  break;
76  c = '5';
77  n = avctx->width * 2;
78  h1 = (h * 3) / 2;
79  break;
80  default:
81  return -1;
82  }
83  snprintf(bytestream, bytestream_end - bytestream,
84  "P%c\n%d %d\n", c, avctx->width, h1);
85  bytestream += strlen(bytestream);
86  if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
87  int maxdepth = (1 << av_pix_fmt_desc_get(avctx->pix_fmt)->comp[0].depth) - 1;
88  snprintf(bytestream, bytestream_end - bytestream,
89  "%d\n", maxdepth);
90  bytestream += strlen(bytestream);
91  }
92 
93  ptr = p->data[0];
94  linesize = p->linesize[0];
95  for (i = 0; i < h; i++) {
96  memcpy(bytestream, ptr, n);
97  bytestream += n;
98  ptr += linesize;
99  }
100 
101  if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
102  h >>= 1;
103  n >>= 1;
104  ptr1 = p->data[1];
105  ptr2 = p->data[2];
106  for (i = 0; i < h; i++) {
107  memcpy(bytestream, ptr1, n);
108  bytestream += n;
109  memcpy(bytestream, ptr2, n);
110  bytestream += n;
111  ptr1 += p->linesize[1];
112  ptr2 += p->linesize[2];
113  }
114  }
115  pkt->size = bytestream - bytestream_start;
116  pkt->flags |= AV_PKT_FLAG_KEY;
117  *got_packet = 1;
118 
119  return 0;
120 }
121 
123 {
124 #if FF_API_CODED_FRAME
127  avctx->coded_frame->key_frame = 1;
129 #endif
130 
131  return 0;
132 }
133 
134 #if CONFIG_PGM_ENCODER
135 AVCodec ff_pgm_encoder = {
136  .name = "pgm",
137  .long_name = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
138  .type = AVMEDIA_TYPE_VIDEO,
139  .id = AV_CODEC_ID_PGM,
140  .init = pnm_encode_init,
141  .encode2 = pnm_encode_frame,
142  .pix_fmts = (const enum AVPixelFormat[]){
144  },
145 };
146 #endif
147 
148 #if CONFIG_PGMYUV_ENCODER
149 AVCodec ff_pgmyuv_encoder = {
150  .name = "pgmyuv",
151  .long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
152  .type = AVMEDIA_TYPE_VIDEO,
153  .id = AV_CODEC_ID_PGMYUV,
154  .init = pnm_encode_init,
155  .encode2 = pnm_encode_frame,
156  .pix_fmts = (const enum AVPixelFormat[]){
158  },
159 };
160 #endif
161 
162 #if CONFIG_PPM_ENCODER
163 AVCodec ff_ppm_encoder = {
164  .name = "ppm",
165  .long_name = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
166  .type = AVMEDIA_TYPE_VIDEO,
167  .id = AV_CODEC_ID_PPM,
168  .init = pnm_encode_init,
169  .encode2 = pnm_encode_frame,
170  .pix_fmts = (const enum AVPixelFormat[]){
172  },
173 };
174 #endif
175 
176 #if CONFIG_PBM_ENCODER
177 AVCodec ff_pbm_encoder = {
178  .name = "pbm",
179  .long_name = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
180  .type = AVMEDIA_TYPE_VIDEO,
181  .id = AV_CODEC_ID_PBM,
182  .init = pnm_encode_init,
183  .encode2 = pnm_encode_frame,
184  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_MONOWHITE,
185  AV_PIX_FMT_NONE },
186 };
187 #endif
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2193
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
misc image utilities
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
int size
Definition: avcodec.h:1575
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1867
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3531
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
uint8_t * data
Definition: avcodec.h:1574
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1606
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:361
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static av_cold int pnm_encode_init(AVCodecContext *avctx)
Definition: pnmenc.c:122
const char * name
Name of the codec implementation.
Definition: avcodec.h:3538
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1580
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:254
int width
picture width / height.
Definition: avcodec.h:1826
int n
Definition: avisynth_c.h:547
static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *p, int *got_packet)
Definition: pnmenc.c:27
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
Definition: pixfmt.h:140
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
main external API structure.
Definition: avcodec.h:1639
Y , 16bpp, big-endian.
Definition: pixfmt.h:98
#define snprintf
Definition: snprintf.h:34
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:1683
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
common internal api header.
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:71
static double c[64]
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:110
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3060
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:249
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1551