FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
img2enc.c
Go to the documentation of this file.
1 /*
2  * Image format
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  * Copyright (c) 2004 Michael Niedermayer
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/avassert.h"
25 #include "libavutil/avstring.h"
26 #include "libavutil/log.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 #include "img2.h"
34 
35 typedef struct VideoMuxData {
36  const AVClass *class; /**< Class for private options. */
38  int is_pipe;
39  int split_planes; /**< use independent file for each Y, U, V plane */
40  char path[1024];
41  char tmp[4][1024];
42  char target[4][1024];
43  int update;
45  int frame_pts;
46  const char *muxer;
48 } VideoMuxData;
49 
51 {
53  AVStream *st = s->streams[0];
55 
56  av_strlcpy(img->path, s->filename, sizeof(img->path));
57 
58  /* find format */
59  if (s->oformat->flags & AVFMT_NOFILE)
60  img->is_pipe = 0;
61  else
62  img->is_pipe = 1;
63 
64  if (st->codecpar->codec_id == AV_CODEC_ID_GIF) {
65  img->muxer = "gif";
66  } else if (st->codecpar->codec_id == AV_CODEC_ID_FITS) {
67  img->muxer = "fits";
68  } else if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
69  const char *str = strrchr(img->path, '.');
70  img->split_planes = str
71  && !av_strcasecmp(str + 1, "y")
72  && s->nb_streams == 1
73  && desc
74  &&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
75  && desc->nb_components >= 3;
76  }
77 
78  return 0;
79 }
80 
82 {
84  AVIOContext *pb[4];
85  char filename[1024];
88  int i;
89  int nb_renames = 0;
90 
91  if (!img->is_pipe) {
92  if (img->update) {
93  av_strlcpy(filename, img->path, sizeof(filename));
94  } else if (img->use_strftime) {
95  time_t now0;
96  struct tm *tm, tmpbuf;
97  time(&now0);
98  tm = localtime_r(&now0, &tmpbuf);
99  if (!strftime(filename, sizeof(filename), img->path, tm)) {
100  av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
101  return AVERROR(EINVAL);
102  }
103  } else if (img->frame_pts) {
104  if (av_get_frame_filename2(filename, sizeof(filename), img->path, pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
105  av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the frames.");
106  return AVERROR(EINVAL);
107  }
108  } else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
109  img->img_number,
111  img->img_number > 1) {
112  av_log(s, AV_LOG_ERROR,
113  "Could not get frame filename number %d from pattern '%s' (either set update or use a pattern like %%03d within the filename pattern)\n",
114  img->img_number, img->path);
115  return AVERROR(EINVAL);
116  }
117  for (i = 0; i < 4; i++) {
118  snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
119  av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
120  if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, NULL) < 0) {
121  av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
122  return AVERROR(EIO);
123  }
124 
125  if (!img->split_planes || i+1 >= desc->nb_components)
126  break;
127  filename[strlen(filename) - 1] = "UVAx"[i];
128  }
129  if (img->use_rename)
130  nb_renames = i + 1;
131  } else {
132  pb[0] = s->pb;
133  }
134 
135  if (img->split_planes) {
136  int ysize = par->width * par->height;
137  int usize = AV_CEIL_RSHIFT(par->width, desc->log2_chroma_w) * AV_CEIL_RSHIFT(par->height, desc->log2_chroma_h);
138  if (desc->comp[0].depth >= 9) {
139  ysize *= 2;
140  usize *= 2;
141  }
142  avio_write(pb[0], pkt->data , ysize);
143  avio_write(pb[1], pkt->data + ysize , usize);
144  avio_write(pb[2], pkt->data + ysize + usize, usize);
145  ff_format_io_close(s, &pb[1]);
146  ff_format_io_close(s, &pb[2]);
147  if (desc->nb_components > 3) {
148  avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
149  ff_format_io_close(s, &pb[3]);
150  }
151  } else if (img->muxer) {
152  int ret;
153  AVStream *st;
154  AVPacket pkt2 = {0};
156 
157  av_assert0(!img->split_planes);
158 
159  ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->filename);
160  if (ret < 0)
161  return ret;
162  st = avformat_new_stream(fmt, NULL);
163  if (!st) {
165  return AVERROR(ENOMEM);
166  }
167  st->id = pkt->stream_index;
168 
169  fmt->pb = pb[0];
170  if ((ret = av_packet_ref(&pkt2, pkt)) < 0 ||
171  (ret = avcodec_parameters_copy(st->codecpar, s->streams[0]->codecpar)) < 0 ||
172  (ret = avformat_write_header(fmt, NULL)) < 0 ||
173  (ret = av_interleaved_write_frame(fmt, &pkt2)) < 0 ||
174  (ret = av_write_trailer(fmt)) < 0) {
175  av_packet_unref(&pkt2);
177  return ret;
178  }
179  av_packet_unref(&pkt2);
181  } else {
182  avio_write(pb[0], pkt->data, pkt->size);
183  }
184  avio_flush(pb[0]);
185  if (!img->is_pipe) {
186  ff_format_io_close(s, &pb[0]);
187  for (i = 0; i < nb_renames; i++) {
188  int ret = ff_rename(img->tmp[i], img->target[i], s);
189  if (ret < 0)
190  return ret;
191  }
192  }
193 
194  img->img_number++;
195  return 0;
196 }
197 
198 static int query_codec(enum AVCodecID id, int std_compliance)
199 {
200  int i;
201  for (i = 0; ff_img_tags[i].id != AV_CODEC_ID_NONE; i++)
202  if (ff_img_tags[i].id == id)
203  return 1;
204 
205  // Anything really can be stored in img2
206  return std_compliance < FF_COMPLIANCE_NORMAL;
207 }
208 
209 #define OFFSET(x) offsetof(VideoMuxData, x)
210 #define ENC AV_OPT_FLAG_ENCODING_PARAM
211 static const AVOption muxoptions[] = {
212  { "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
213  { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
214  { "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
215  { "frame_pts", "use current frame pts for filename", OFFSET(frame_pts), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
216  { "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
217  { NULL },
218 };
219 
220 #if CONFIG_IMAGE2_MUXER
221 static const AVClass img2mux_class = {
222  .class_name = "image2 muxer",
223  .item_name = av_default_item_name,
224  .option = muxoptions,
225  .version = LIBAVUTIL_VERSION_INT,
226 };
227 
228 AVOutputFormat ff_image2_muxer = {
229  .name = "image2",
230  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
231  .extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
232  "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
233  "sunras,xbm,xface,pix,y",
234  .priv_data_size = sizeof(VideoMuxData),
235  .video_codec = AV_CODEC_ID_MJPEG,
240  .priv_class = &img2mux_class,
241 };
242 #endif
243 #if CONFIG_IMAGE2PIPE_MUXER
244 AVOutputFormat ff_image2pipe_muxer = {
245  .name = "image2pipe",
246  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
247  .priv_data_size = sizeof(VideoMuxData),
248  .video_codec = AV_CODEC_ID_MJPEG,
253 };
254 #endif
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2359
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1199
AVOption.
Definition: opt.h:246
int use_strftime
Definition: img2enc.c:44
const char * fmt
Definition: avisynth_c.h:769
enum AVCodecID id
Definition: img2.h:67
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
const char * desc
Definition: nvenc.c:63
#define OFFSET(x)
Definition: img2enc.c:209
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3736
int size
Definition: avcodec.h:1400
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:193
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:656
static AVPacket pkt
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3728
Format I/O context.
Definition: avformat.h:1325
#define img
static int query_codec(enum AVCodecID id, int std_compliance)
Definition: img2enc.c:198
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int use_rename
Definition: img2enc.c:47
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
int flags
can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, AVFMT_TS_NONSTRICT, AVFMT_TS_NEGATIVE
Definition: avformat.h:526
int width
Video only.
Definition: avcodec.h:3802
AVOptions.
int id
Format-specific stream ID.
Definition: avformat.h:879
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5454
char path[1024]
Definition: img2enc.c:40
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4377
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
static const AVOption muxoptions[]
Definition: img2enc.c:211
uint8_t * data
Definition: avcodec.h:1399
static int flags
Definition: log.c:57
static int write_header(AVFormatContext *s)
Definition: img2enc.c:50
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:216
#define av_log(a,...)
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1344
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:599
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: img2enc.c:81
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:214
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2224
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#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:190
int frame_pts
Definition: img2enc.c:45
simple assert() macros that are a bit more flexible than ISO C assert().
#define AV_FRAME_FILENAME_FLAGS_MULTIPLE
Allow multiple d.
Definition: avformat.h:2805
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
static av_always_inline void update(SilenceDetectContext *s, AVFrame *insamples, int is_silence, int64_t nb_samples_notify, AVRational time_base)
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:236
char filename[1024]
input or output filename
Definition: avformat.h:1401
av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:508
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
const char * name
Definition: avformat.h:507
char tmp[4][1024]
Definition: img2enc.c:41
char target[4][1024]
Definition: img2enc.c:42
Stream structure.
Definition: avformat.h:872
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:469
int img_number
Definition: img2enc.c:37
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:590
int av_get_frame_filename2(char *buf, int buf_size, const char *path, int number, int flags)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:4567
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:545
Describe the class of an AVClass context structure.
Definition: log.h:67
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2542
const IdStrMap ff_img_tags[]
Definition: img2.c:27
#define ENC
Definition: img2enc.c:210
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4312
Main libavformat public API header.
int update
Definition: img2enc.c:43
int split_planes
use independent file for each Y, U, V plane
Definition: img2enc.c:39
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
int is_pipe
Definition: img2enc.c:38
void * priv_data
Format private data.
Definition: avformat.h:1353
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:473
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1261
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1014
int stream_index
Definition: avcodec.h:1401
int depth
Number of bits in the component.
Definition: pixdesc.h:58
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1885
const char * muxer
Definition: img2enc.c:46
This structure stores compressed data.
Definition: avcodec.h:1376
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1392
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58