FFmpeg: libavformat/img2enc.c Source File

FFmpeg
img2enc.c
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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"
29 #include "libavutil/time_internal.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. */
37   int img_number;
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;
44   int use_strftime;
45   const char *muxer;
46   int use_rename;
47 } VideoMuxData;
48 
49  static int write_header(AVFormatContext *s)
50 {
51  VideoMuxData *img = s->priv_data;
52  AVStream *st = s->streams[0];
53  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(st->codec->pix_fmt);
54 
55  av_strlcpy(img->path, s->filename, sizeof(img->path));
56 
57  /* find format */
58  if (s->oformat->flags & AVFMT_NOFILE)
59  img->is_pipe = 0;
60  else
61  img->is_pipe = 1;
62 
63  if (st->codec->codec_id == AV_CODEC_ID_GIF) {
64  img->muxer = "gif";
65  } else if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
66  const char *str = strrchr(img->path, '.');
67  img->split_planes = str
68  && !av_strcasecmp(str + 1, "y")
69  && s->nb_streams == 1
70  && desc
71  &&(desc->flags & AV_PIX_FMT_FLAG_PLANAR)
72  && desc->nb_components >= 3;
73  }
74 
75  return 0;
76 }
77 
78  static int write_packet(AVFormatContext *s, AVPacket *pkt)
79 {
80  VideoMuxData *img = s->priv_data;
81  AVIOContext *pb[4];
82  char filename[1024];
83  AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
84  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(codec->pix_fmt);
85  int i;
86  int nb_renames = 0;
87 
88  if (!img->is_pipe) {
89  if (img->update) {
90  av_strlcpy(filename, img->path, sizeof(filename));
91  } else if (img->use_strftime) {
92  time_t now0;
93  struct tm *tm, tmpbuf;
94  time(&now0);
95  tm = localtime_r(&now0, &tmpbuf);
96  if (!strftime(filename, sizeof(filename), img->path, tm)) {
97  av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
98  return AVERROR(EINVAL);
99  }
100  } else if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 &&
101  img->img_number > 1) {
102  av_log(s, AV_LOG_ERROR,
103  "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
104  img->img_number, img->path);
105  return AVERROR(EINVAL);
106  }
107  for (i = 0; i < 4; i++) {
108  snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
109  av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
110  if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, NULL) < 0) {
111  av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
112  return AVERROR(EIO);
113  }
114 
115  if (!img->split_planes || i+1 >= desc->nb_components)
116  break;
117  filename[strlen(filename) - 1] = "UVAx"[i];
118  }
119  if (img->use_rename)
120  nb_renames = i + 1;
121  } else {
122  pb[0] = s->pb;
123  }
124 
125  if (img->split_planes) {
126  int ysize = codec->width * codec->height;
127  int usize = AV_CEIL_RSHIFT(codec->width, desc->log2_chroma_w) * AV_CEIL_RSHIFT(codec->height, desc->log2_chroma_h);
128  if (desc->comp[0].depth >= 9) {
129  ysize *= 2;
130  usize *= 2;
131  }
132  avio_write(pb[0], pkt->data , ysize);
133  avio_write(pb[1], pkt->data + ysize , usize);
134  avio_write(pb[2], pkt->data + ysize + usize, usize);
135  ff_format_io_close(s, &pb[1]);
136  ff_format_io_close(s, &pb[2]);
137  if (desc->nb_components > 3) {
138  avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
139  ff_format_io_close(s, &pb[3]);
140  }
141  } else if (img->muxer) {
142  int ret;
143  AVStream *st;
144  AVPacket pkt2 = {0};
145  AVFormatContext *fmt = NULL;
146 
147  av_assert0(!img->split_planes);
148 
149  ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->filename);
150  if (ret < 0)
151  return ret;
152  st = avformat_new_stream(fmt, NULL);
153  if (!st) {
154  avformat_free_context(fmt);
155  return AVERROR(ENOMEM);
156  }
157  st->id = pkt->stream_index;
158 
159  fmt->pb = pb[0];
160  if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
161  (ret = av_dup_packet(&pkt2)) < 0 ||
162  (ret = avcodec_copy_context(st->codec, s->streams[0]->codec)) < 0 ||
163  (ret = avformat_write_header(fmt, NULL)) < 0 ||
164  (ret = av_interleaved_write_frame(fmt, &pkt2)) < 0 ||
165  (ret = av_write_trailer(fmt)) < 0) {
166  av_packet_unref(&pkt2);
167  avformat_free_context(fmt);
168  return ret;
169  }
170  av_packet_unref(&pkt2);
171  avformat_free_context(fmt);
172  } else {
173  avio_write(pb[0], pkt->data, pkt->size);
174  }
175  avio_flush(pb[0]);
176  if (!img->is_pipe) {
177  ff_format_io_close(s, &pb[0]);
178  for (i = 0; i < nb_renames; i++) {
179  int ret = ff_rename(img->tmp[i], img->target[i], s);
180  if (ret < 0)
181  return ret;
182  }
183  }
184 
185  img->img_number++;
186  return 0;
187 }
188 
189  static int query_codec(enum AVCodecID id, int std_compliance)
190 {
191  int i;
192  for (i = 0; ff_img_tags[i].id != AV_CODEC_ID_NONE; i++)
193  if (ff_img_tags[i].id == id)
194  return 1;
195 
196  // Anything really can be stored in img2
197  return std_compliance < FF_COMPLIANCE_NORMAL;
198 }
199 
200  #define OFFSET(x) offsetof(VideoMuxData, x)
201  #define ENC AV_OPT_FLAG_ENCODING_PARAM
202  static const AVOption muxoptions[] = {
203  { "updatefirst", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
204  { "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
205  { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
206  { "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
207  { "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
208  { NULL },
209 };
210 
211 #if CONFIG_IMAGE2_MUXER
212 static const AVClass img2mux_class = {
213  .class_name = "image2 muxer",
214  .item_name = av_default_item_name,
215  .option = muxoptions,
216  .version = LIBAVUTIL_VERSION_INT,
217 };
218 
219 AVOutputFormat ff_image2_muxer = {
220  .name = "image2",
221  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
222  .extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
223  "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
224  "sunras,xbm,xface,pix,y",
225  .priv_data_size = sizeof(VideoMuxData),
226  .video_codec = AV_CODEC_ID_MJPEG,
227  .write_header = write_header,
228  .write_packet = write_packet,
229  .query_codec = query_codec,
230  .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
231  .priv_class = &img2mux_class,
232 };
233 #endif
234 #if CONFIG_IMAGE2PIPE_MUXER
235 AVOutputFormat ff_image2pipe_muxer = {
236  .name = "image2pipe",
237  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
238  .priv_data_size = sizeof(VideoMuxData),
239  .video_codec = AV_CODEC_ID_MJPEG,
240  .write_header = write_header,
241  .write_packet = write_packet,
242  .query_codec = query_codec,
243  .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
244 };
245 #endif
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:631
AVIOContext
Bytestream IO Context.
Definition: avio.h:111
AV_CODEC_ID_NONE
Definition: avcodec.h:102
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2157
av_interleaved_write_frame
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1016
time_internal.h
AVOption
AVOption.
Definition: opt.h:245
VideoMuxData::use_strftime
int use_strftime
Definition: img2enc.c:44
fmt
const char * fmt
Definition: avisynth_c.h:632
IdStrMap::id
enum AVCodecID id
Definition: img2.h:67
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
AV_OPT_TYPE_INT
Definition: opt.h:223
OFFSET
#define OFFSET(x)
Definition: img2enc.c:200
AVPacket::size
int size
Definition: avcodec.h:1468
AVIO_FLAG_WRITE
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:538
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
avcodec_copy_context
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:182
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
AVFormatContext
Format I/O context.
Definition: avformat.h:1314
img
#define img
Definition: vf_colormatrix.c:121
query_codec
static int query_codec(enum AVCodecID id, int std_compliance)
Definition: img2enc.c:189
AVClass::class_name
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
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
VideoMuxData::use_rename
int use_rename
Definition: img2enc.c:46
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
AVOutputFormat::flags
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
Definition: avformat.h:542
opt.h
AVOptions.
AVStream::id
int id
Format-specific stream ID.
Definition: avformat.h:884
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:4736
VideoMuxData::path
char path[1024]
Definition: img2enc.c:40
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1382
muxoptions
static const AVOption muxoptions[]
Definition: img2enc.c:202
avio_internal.h
AVPacket::data
uint8_t * data
Definition: avcodec.h:1467
write_header
static int write_header(AVFormatContext *s)
Definition: img2enc.c:49
AV_CODEC_ID_MJPEG
Definition: avcodec.h:114
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:182
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVFormatContext::oformat
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1333
avformat_alloc_output_context2
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
write_packet
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: img2enc.c:78
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:101
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:68
AVERROR
#define AVERROR(e)
Definition: error.h:43
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:176
av_dup_packet
attribute_deprecated int av_dup_packet(AVPacket *pkt)
Definition: avpacket.c:235
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
av_strlcpy
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
AVStream::codec
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
AVPixFmtDescriptor::flags
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1370
update
static av_always_inline void update(SilenceDetectContext *s, AVFrame *insamples, int is_silence, int64_t nb_samples_notify, AVRational time_base)
Definition: af_silencedetect.c:66
AVPixFmtDescriptor::nb_components
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:202
AVFormatContext::filename
char filename[1024]
input or output filename
Definition: avformat.h:1390
avformat_write_header
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:451
av_strcasecmp
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
localtime_r
static struct tm * localtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:37
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1711
AVOutputFormat::name
const char * name
Definition: avformat.h:523
AV_OPT_TYPE_BOOL
Definition: opt.h:239
VideoMuxData::tmp
char tmp[4][1024]
Definition: img2enc.c:41
AVCodecContext::height
int height
Definition: avcodec.h:1711
VideoMuxData::target
char target[4][1024]
Definition: img2enc.c:42
av_get_frame_filename
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Return in 'buf' the path with 'd' replaced by a number.
Definition: utils.c:3974
AVStream
Stream structure.
Definition: avformat.h:877
AVFMT_NOTIMESTAMPS
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:485
VideoMuxData::img_number
int img_number
Definition: img2enc.c:37
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1549
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVCodecContext
main external API structure.
Definition: avcodec.h:1532
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:545
av_copy_packet
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
Definition: avpacket.c:246
ff_rename
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:480
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
FF_COMPLIANCE_NORMAL
#define FF_COMPLIANCE_NORMAL
Definition: avcodec.h:2744
ff_img_tags
const IdStrMap ff_img_tags[]
Definition: img2.c:27
ENC
#define ENC
Definition: img2enc.c:201
snprintf
#define snprintf
Definition: snprintf.h:34
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:3741
flags
static int flags
Definition: cpu.c:47
avformat.h
Main libavformat public API header.
VideoMuxData::update
int update
Definition: img2enc.c:43
VideoMuxData::split_planes
int split_planes
use independent file for each Y, U, V plane
Definition: img2enc.c:39
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:477
VideoMuxData::is_pipe
int is_pipe
Definition: img2enc.c:38
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1342
AVFMT_NODIMENSIONS
#define AVFMT_NODIMENSIONS
Format does not need width/height.
Definition: avformat.h:489
av_write_trailer
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1083
AV_CODEC_ID_GIF
Definition: avcodec.h:204
AV_CODEC_ID_RAWVIDEO
Definition: avcodec.h:120
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1469
AVComponentDescriptor::depth
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1872
VideoMuxData::muxer
const char * muxer
Definition: img2enc.c:45
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
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