aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavformat / img2dec.c
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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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/avstring.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/parseutils.h"
28 #include "avformat.h"
29 #include "internal.h"
30
31 typedef struct VideoDemuxData {
32 const AVClass *class; /**< Class for private options. */
33 int img_first;
34 int img_last;
35 int img_number;
36 int img_count;
37 int is_pipe;
38 char path[1024];
39 char *pixel_format; /**< Set by a private option. */
40 char *video_size; /**< Set by a private option. */
41 char *framerate; /**< Set by a private option. */
42 int loop;
43 int start_number;
44 } VideoDemuxData;
45
46 static const int sizes[][2] = {
47 { 640, 480 },
48 { 720, 480 },
49 { 720, 576 },
50 { 352, 288 },
51 { 352, 240 },
52 { 160, 128 },
53 { 512, 384 },
54 { 640, 352 },
55 { 640, 240 },
56 };
57
58 static int infer_size(int *width_ptr, int *height_ptr, int size)
59 {
60 int i;
61
62 for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
63 if ((sizes[i][0] * sizes[i][1]) == size) {
64 *width_ptr = sizes[i][0];
65 *height_ptr = sizes[i][1];
66 return 0;
67 }
68 }
69
70 return -1;
71 }
72
73 /* return -1 if no image found */
74 static int find_image_range(int *pfirst_index, int *plast_index,
75 const char *path, int max_start)
76 {
77 char buf[1024];
78 int range, last_index, range1, first_index;
79
80 /* find the first image */
81 for (first_index = 0; first_index < max_start; first_index++) {
82 if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
83 *pfirst_index =
84 *plast_index = 1;
85 if (avio_check(buf, AVIO_FLAG_READ) > 0)
86 return 0;
87 return -1;
88 }
89 if (avio_check(buf, AVIO_FLAG_READ) > 0)
90 break;
91 }
92 if (first_index == 5)
93 goto fail;
94
95 /* find the last image */
96 last_index = first_index;
97 for (;;) {
98 range = 0;
99 for (;;) {
100 if (!range)
101 range1 = 1;
102 else
103 range1 = 2 * range;
104 if (av_get_frame_filename(buf, sizeof(buf), path,
105 last_index + range1) < 0)
106 goto fail;
107 if (avio_check(buf, AVIO_FLAG_READ) <= 0)
108 break;
109 range = range1;
110 /* just in case... */
111 if (range >= (1 << 30))
112 goto fail;
113 }
114 /* we are sure than image last_index + range exists */
115 if (!range)
116 break;
117 last_index += range;
118 }
119 *pfirst_index = first_index;
120 *plast_index = last_index;
121 return 0;
122
123 fail:
124 return -1;
125 }
126
127 static int img_read_probe(AVProbeData *p)
128 {
129 if (p->filename && ff_guess_image2_codec(p->filename)) {
130 if (av_filename_number_test(p->filename))
131 return AVPROBE_SCORE_MAX;
132 else
133 return AVPROBE_SCORE_EXTENSION;
134 }
135 return 0;
136 }
137
138 static int img_read_header(AVFormatContext *s1)
139 {
140 VideoDemuxData *s = s1->priv_data;
141 int first_index, last_index, ret = 0;
142 int width = 0, height = 0;
143 AVStream *st;
144 enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
145 AVRational framerate;
146
147 s1->ctx_flags |= AVFMTCTX_NOHEADER;
148
149 st = avformat_new_stream(s1, NULL);
150 if (!st) {
151 return AVERROR(ENOMEM);
152 }
153
154 if (s->pixel_format &&
155 (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
156 av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
157 s->pixel_format);
158 return AVERROR(EINVAL);
159 }
160 if (s->video_size &&
161 (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
162 av_log(s, AV_LOG_ERROR,
163 "Could not parse video size: %s.\n", s->video_size);
164 return ret;
165 }
166 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
167 av_log(s, AV_LOG_ERROR,
168 "Could not parse framerate: %s.\n", s->framerate);
169 return ret;
170 }
171
172 av_strlcpy(s->path, s1->filename, sizeof(s->path));
173 s->img_number = 0;
174 s->img_count = 0;
175
176 /* find format */
177 if (s1->iformat->flags & AVFMT_NOFILE)
178 s->is_pipe = 0;
179 else {
180 s->is_pipe = 1;
181 st->need_parsing = AVSTREAM_PARSE_FULL;
182 }
183
184 avpriv_set_pts_info(st, 60, framerate.den, framerate.num);
185
186 if (width && height) {
187 st->codec->width = width;
188 st->codec->height = height;
189 }
190
191 if (!s->is_pipe) {
192 if (find_image_range(&first_index, &last_index, s->path,
193 FFMAX(s->start_number, 5)) < 0)
194 return AVERROR(ENOENT);
195 s->img_first = first_index;
196 s->img_last = last_index;
197 s->img_number = s->start_number != 1 ? s->start_number : first_index;
198 /* compute duration */
199 st->start_time = 0;
200 st->duration = last_index - first_index + 1;
201 }
202
203 if (s1->video_codec_id) {
204 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
205 st->codec->codec_id = s1->video_codec_id;
206 } else if (s1->audio_codec_id) {
207 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
208 st->codec->codec_id = s1->audio_codec_id;
209 } else {
210 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
211 st->codec->codec_id = ff_guess_image2_codec(s->path);
212 }
213 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
214 pix_fmt != AV_PIX_FMT_NONE)
215 st->codec->pix_fmt = pix_fmt;
216
217 return 0;
218 }
219
220 static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
221 {
222 VideoDemuxData *s = s1->priv_data;
223 char filename[1024];
224 int i, res;
225 int size[3] = { 0 }, ret[3] = { 0 };
226 AVIOContext *f[3] = { NULL };
227 AVCodecContext *codec = s1->streams[0]->codec;
228
229 if (!s->is_pipe) {
230 /* loop over input */
231 if (s->loop && s->img_number > s->img_last) {
232 s->img_number = s->img_first;
233 }
234 if (s->img_number > s->img_last)
235 return AVERROR_EOF;
236 if (av_get_frame_filename(filename, sizeof(filename),
237 s->path,
238 s->img_number) < 0 && s->img_number > 1)
239 return AVERROR(EIO);
240 for (i = 0; i < 3; i++) {
241 if (s1->io_open(s1, &f[i], filename, AVIO_FLAG_READ, NULL) < 0) {
242 if (i >= 1)
243 break;
244 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
245 filename);
246 return AVERROR(EIO);
247 }
248 size[i] = avio_size(f[i]);
249
250 if (codec->codec_id != AV_CODEC_ID_RAWVIDEO)
251 break;
252 filename[strlen(filename) - 1] = 'U' + i;
253 }
254
255 if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
256 infer_size(&codec->width, &codec->height, size[0]);
257 } else {
258 f[0] = s1->pb;
259 if (f[0]->eof_reached)
260 return AVERROR(EIO);
261 size[0] = 4096;
262 }
263
264 res = av_new_packet(pkt, size[0] + size[1] + size[2]);
265 if (res < 0)
266 return res;
267 pkt->stream_index = 0;
268 pkt->flags |= AV_PKT_FLAG_KEY;
269
270 pkt->size = 0;
271 for (i = 0; i < 3; i++) {
272 if (f[i]) {
273 ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
274 if (!s->is_pipe)
275 ff_format_io_close(s1, &f[i]);
276 if (ret[i] > 0)
277 pkt->size += ret[i];
278 }
279 }
280
281 if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
282 av_packet_unref(pkt);
283 return AVERROR(EIO); /* signal EOF */
284 } else {
285 s->img_count++;
286 s->img_number++;
287 return 0;
288 }
289 }
290
291 #define OFFSET(x) offsetof(VideoDemuxData, x)
292 #define DEC AV_OPT_FLAG_DECODING_PARAM
293 static const AVOption options[] = {
294 { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
295 { "video_size", "", OFFSET(video_size), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
296 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "25" }, 0, 0, DEC },
297 { "loop", "", OFFSET(loop), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, DEC },
298 { "start_number", "first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, DEC },
299 { NULL },
300 };
301
302 #if CONFIG_IMAGE2_DEMUXER
303 static const AVClass img2_class = {
304 .class_name = "image2 demuxer",
305 .item_name = av_default_item_name,
306 .option = options,
307 .version = LIBAVUTIL_VERSION_INT,
308 };
309 AVInputFormat ff_image2_demuxer = {
310 .name = "image2",
311 .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
312 .priv_data_size = sizeof(VideoDemuxData),
313 .read_probe = img_read_probe,
314 .read_header = img_read_header,
315 .read_packet = img_read_packet,
316 .flags = AVFMT_NOFILE,
317 .priv_class = &img2_class,
318 };
319 #endif
320 #if CONFIG_IMAGE2PIPE_DEMUXER
321 static const AVClass img2pipe_class = {
322 .class_name = "image2pipe demuxer",
323 .item_name = av_default_item_name,
324 .option = options,
325 .version = LIBAVUTIL_VERSION_INT,
326 };
327 AVInputFormat ff_image2pipe_demuxer = {
328 .name = "image2pipe",
329 .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
330 .priv_data_size = sizeof(VideoDemuxData),
331 .read_header = img_read_header,
332 .read_packet = img_read_packet,
333 .priv_class = &img2pipe_class,
334 };
335 #endif