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path: root/libavformat/img2enc.c (plain)
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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
35typedef 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
49static 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->codecpar->format);
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->codecpar->codec_id == AV_CODEC_ID_GIF) {
64 img->muxer = "gif";
65 } else if (st->codecpar->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
78static int write_packet(AVFormatContext *s, AVPacket *pkt)
79{
80 VideoMuxData *img = s->priv_data;
81 AVIOContext *pb[4];
82 char filename[1024];
83 AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
84 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(par->format);
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_filename2(filename, sizeof(filename), img->path,
101 img->img_number,
102 AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
103 img->img_number > 1) {
104 av_log(s, AV_LOG_ERROR,
105 "Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
106 img->img_number, img->path);
107 return AVERROR(EINVAL);
108 }
109 for (i = 0; i < 4; i++) {
110 snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
111 av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
112 if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, NULL) < 0) {
113 av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
114 return AVERROR(EIO);
115 }
116
117 if (!img->split_planes || i+1 >= desc->nb_components)
118 break;
119 filename[strlen(filename) - 1] = "UVAx"[i];
120 }
121 if (img->use_rename)
122 nb_renames = i + 1;
123 } else {
124 pb[0] = s->pb;
125 }
126
127 if (img->split_planes) {
128 int ysize = par->width * par->height;
129 int usize = AV_CEIL_RSHIFT(par->width, desc->log2_chroma_w) * AV_CEIL_RSHIFT(par->height, desc->log2_chroma_h);
130 if (desc->comp[0].depth >= 9) {
131 ysize *= 2;
132 usize *= 2;
133 }
134 avio_write(pb[0], pkt->data , ysize);
135 avio_write(pb[1], pkt->data + ysize , usize);
136 avio_write(pb[2], pkt->data + ysize + usize, usize);
137 ff_format_io_close(s, &pb[1]);
138 ff_format_io_close(s, &pb[2]);
139 if (desc->nb_components > 3) {
140 avio_write(pb[3], pkt->data + ysize + 2*usize, ysize);
141 ff_format_io_close(s, &pb[3]);
142 }
143 } else if (img->muxer) {
144 int ret;
145 AVStream *st;
146 AVPacket pkt2 = {0};
147 AVFormatContext *fmt = NULL;
148
149 av_assert0(!img->split_planes);
150
151 ret = avformat_alloc_output_context2(&fmt, NULL, img->muxer, s->filename);
152 if (ret < 0)
153 return ret;
154 st = avformat_new_stream(fmt, NULL);
155 if (!st) {
156 avformat_free_context(fmt);
157 return AVERROR(ENOMEM);
158 }
159 st->id = pkt->stream_index;
160
161 fmt->pb = pb[0];
162 if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
163 (ret = av_dup_packet(&pkt2)) < 0 ||
164 (ret = avcodec_parameters_copy(st->codecpar, s->streams[0]->codecpar)) < 0 ||
165 (ret = avformat_write_header(fmt, NULL)) < 0 ||
166 (ret = av_interleaved_write_frame(fmt, &pkt2)) < 0 ||
167 (ret = av_write_trailer(fmt)) < 0) {
168 av_packet_unref(&pkt2);
169 avformat_free_context(fmt);
170 return ret;
171 }
172 av_packet_unref(&pkt2);
173 avformat_free_context(fmt);
174 } else {
175 avio_write(pb[0], pkt->data, pkt->size);
176 }
177 avio_flush(pb[0]);
178 if (!img->is_pipe) {
179 ff_format_io_close(s, &pb[0]);
180 for (i = 0; i < nb_renames; i++) {
181 int ret = ff_rename(img->tmp[i], img->target[i], s);
182 if (ret < 0)
183 return ret;
184 }
185 }
186
187 img->img_number++;
188 return 0;
189}
190
191static int query_codec(enum AVCodecID id, int std_compliance)
192{
193 int i;
194 for (i = 0; ff_img_tags[i].id != AV_CODEC_ID_NONE; i++)
195 if (ff_img_tags[i].id == id)
196 return 1;
197
198 // Anything really can be stored in img2
199 return std_compliance < FF_COMPLIANCE_NORMAL;
200}
201
202#define OFFSET(x) offsetof(VideoMuxData, x)
203#define ENC AV_OPT_FLAG_ENCODING_PARAM
204static const AVOption muxoptions[] = {
205 { "updatefirst", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
206 { "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
207 { "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
208 { "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
209 { "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
210 { NULL },
211};
212
213#if CONFIG_IMAGE2_MUXER
214static const AVClass img2mux_class = {
215 .class_name = "image2 muxer",
216 .item_name = av_default_item_name,
217 .option = muxoptions,
218 .version = LIBAVUTIL_VERSION_INT,
219};
220
221AVOutputFormat ff_image2_muxer = {
222 .name = "image2",
223 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
224 .extensions = "bmp,dpx,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,"
225 "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
226 "sunras,xbm,xface,pix,y",
227 .priv_data_size = sizeof(VideoMuxData),
228 .video_codec = AV_CODEC_ID_MJPEG,
229 .write_header = write_header,
230 .write_packet = write_packet,
231 .query_codec = query_codec,
232 .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS | AVFMT_NOFILE,
233 .priv_class = &img2mux_class,
234};
235#endif
236#if CONFIG_IMAGE2PIPE_MUXER
237AVOutputFormat ff_image2pipe_muxer = {
238 .name = "image2pipe",
239 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
240 .priv_data_size = sizeof(VideoMuxData),
241 .video_codec = AV_CODEC_ID_MJPEG,
242 .write_header = write_header,
243 .write_packet = write_packet,
244 .query_codec = query_codec,
245 .flags = AVFMT_NOTIMESTAMPS | AVFMT_NODIMENSIONS
246};
247#endif
248
generated by cgit at 2024-05-17 04:16:36 (GMT)