cmdutils: get rid of dummy contexts for examining AVOptions.
[libav.git] / avprobe.c
1 /*
2 * avprobe : Simple Media Prober based on the Libav libraries
3 * Copyright (c) 2007-2010 Stefano Sabatini
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config.h"
23
24 #include "libavformat/avformat.h"
25 #include "libavcodec/avcodec.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/dict.h"
29 #include "libavdevice/avdevice.h"
30 #include "cmdutils.h"
31
32 const char program_name[] = "avprobe";
33 const int program_birth_year = 2007;
34
35 static int do_show_format = 0;
36 static int do_show_packets = 0;
37 static int do_show_streams = 0;
38
39 static int show_value_unit = 0;
40 static int use_value_prefix = 0;
41 static int use_byte_value_binary_prefix = 0;
42 static int use_value_sexagesimal_format = 0;
43
44 /* globals */
45 static const OptionDef options[];
46
47 /* AVprobe context */
48 static const char *input_filename;
49 static AVInputFormat *iformat = NULL;
50
51 static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
52 static const char *decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P" };
53
54 static const char *unit_second_str = "s" ;
55 static const char *unit_hertz_str = "Hz" ;
56 static const char *unit_byte_str = "byte" ;
57 static const char *unit_bit_per_second_str = "bit/s";
58
59 static char *value_string(char *buf, int buf_size, double val, const char *unit)
60 {
61 if (unit == unit_second_str && use_value_sexagesimal_format) {
62 double secs;
63 int hours, mins;
64 secs = val;
65 mins = (int)secs / 60;
66 secs = secs - mins * 60;
67 hours = mins / 60;
68 mins %= 60;
69 snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
70 } else if (use_value_prefix) {
71 const char *prefix_string;
72 int index;
73
74 if (unit == unit_byte_str && use_byte_value_binary_prefix) {
75 index = (int) (log(val)/log(2)) / 10;
76 index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
77 val /= pow(2, index*10);
78 prefix_string = binary_unit_prefixes[index];
79 } else {
80 index = (int) (log10(val)) / 3;
81 index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
82 val /= pow(10, index*3);
83 prefix_string = decimal_unit_prefixes[index];
84 }
85
86 snprintf(buf, buf_size, "%.3f %s%s", val, prefix_string, show_value_unit ? unit : "");
87 } else {
88 snprintf(buf, buf_size, "%f %s", val, show_value_unit ? unit : "");
89 }
90
91 return buf;
92 }
93
94 static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base)
95 {
96 if (val == AV_NOPTS_VALUE) {
97 snprintf(buf, buf_size, "N/A");
98 } else {
99 value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
100 }
101
102 return buf;
103 }
104
105 static char *ts_value_string (char *buf, int buf_size, int64_t ts)
106 {
107 if (ts == AV_NOPTS_VALUE) {
108 snprintf(buf, buf_size, "N/A");
109 } else {
110 snprintf(buf, buf_size, "%"PRId64, ts);
111 }
112
113 return buf;
114 }
115
116 static const char *media_type_string(enum AVMediaType media_type)
117 {
118 switch (media_type) {
119 case AVMEDIA_TYPE_VIDEO: return "video";
120 case AVMEDIA_TYPE_AUDIO: return "audio";
121 case AVMEDIA_TYPE_DATA: return "data";
122 case AVMEDIA_TYPE_SUBTITLE: return "subtitle";
123 case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
124 default: return "unknown";
125 }
126 }
127
128 static void show_packet(AVFormatContext *fmt_ctx, AVPacket *pkt)
129 {
130 char val_str[128];
131 AVStream *st = fmt_ctx->streams[pkt->stream_index];
132
133 printf("[PACKET]\n");
134 printf("codec_type=%s\n" , media_type_string(st->codec->codec_type));
135 printf("stream_index=%d\n" , pkt->stream_index);
136 printf("pts=%s\n" , ts_value_string (val_str, sizeof(val_str), pkt->pts));
137 printf("pts_time=%s\n" , time_value_string(val_str, sizeof(val_str), pkt->pts, &st->time_base));
138 printf("dts=%s\n" , ts_value_string (val_str, sizeof(val_str), pkt->dts));
139 printf("dts_time=%s\n" , time_value_string(val_str, sizeof(val_str), pkt->dts, &st->time_base));
140 printf("duration=%s\n" , ts_value_string (val_str, sizeof(val_str), pkt->duration));
141 printf("duration_time=%s\n", time_value_string(val_str, sizeof(val_str), pkt->duration, &st->time_base));
142 printf("size=%s\n" , value_string (val_str, sizeof(val_str), pkt->size, unit_byte_str));
143 printf("pos=%"PRId64"\n" , pkt->pos);
144 printf("flags=%c\n" , pkt->flags & AV_PKT_FLAG_KEY ? 'K' : '_');
145 printf("[/PACKET]\n");
146 }
147
148 static void show_packets(AVFormatContext *fmt_ctx)
149 {
150 AVPacket pkt;
151
152 av_init_packet(&pkt);
153
154 while (!av_read_frame(fmt_ctx, &pkt))
155 show_packet(fmt_ctx, &pkt);
156 }
157
158 static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
159 {
160 AVStream *stream = fmt_ctx->streams[stream_idx];
161 AVCodecContext *dec_ctx;
162 AVCodec *dec;
163 char val_str[128];
164 AVDictionaryEntry *tag = NULL;
165 AVRational display_aspect_ratio;
166
167 printf("[STREAM]\n");
168
169 printf("index=%d\n", stream->index);
170
171 if ((dec_ctx = stream->codec)) {
172 if ((dec = dec_ctx->codec)) {
173 printf("codec_name=%s\n", dec->name);
174 printf("codec_long_name=%s\n", dec->long_name);
175 } else {
176 printf("codec_name=unknown\n");
177 }
178
179 printf("codec_type=%s\n", media_type_string(dec_ctx->codec_type));
180 printf("codec_time_base=%d/%d\n", dec_ctx->time_base.num, dec_ctx->time_base.den);
181
182 /* print AVI/FourCC tag */
183 av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
184 printf("codec_tag_string=%s\n", val_str);
185 printf("codec_tag=0x%04x\n", dec_ctx->codec_tag);
186
187 switch (dec_ctx->codec_type) {
188 case AVMEDIA_TYPE_VIDEO:
189 printf("width=%d\n", dec_ctx->width);
190 printf("height=%d\n", dec_ctx->height);
191 printf("has_b_frames=%d\n", dec_ctx->has_b_frames);
192 if (dec_ctx->sample_aspect_ratio.num) {
193 printf("sample_aspect_ratio=%d:%d\n", dec_ctx->sample_aspect_ratio.num,
194 dec_ctx->sample_aspect_ratio.den);
195 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
196 dec_ctx->width * dec_ctx->sample_aspect_ratio.num,
197 dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
198 1024*1024);
199 printf("display_aspect_ratio=%d:%d\n", display_aspect_ratio.num,
200 display_aspect_ratio.den);
201 }
202 printf("pix_fmt=%s\n", dec_ctx->pix_fmt != PIX_FMT_NONE ?
203 av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
204 printf("level=%d\n", dec_ctx->level);
205 break;
206
207 case AVMEDIA_TYPE_AUDIO:
208 printf("sample_rate=%s\n", value_string(val_str, sizeof(val_str),
209 dec_ctx->sample_rate,
210 unit_hertz_str));
211 printf("channels=%d\n", dec_ctx->channels);
212 printf("bits_per_sample=%d\n", av_get_bits_per_sample(dec_ctx->codec_id));
213 break;
214 }
215 } else {
216 printf("codec_type=unknown\n");
217 }
218
219 if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
220 printf("id=0x%x\n", stream->id);
221 printf("r_frame_rate=%d/%d\n", stream->r_frame_rate.num, stream->r_frame_rate.den);
222 printf("avg_frame_rate=%d/%d\n", stream->avg_frame_rate.num, stream->avg_frame_rate.den);
223 printf("time_base=%d/%d\n", stream->time_base.num, stream->time_base.den);
224 printf("start_time=%s\n", time_value_string(val_str, sizeof(val_str), stream->start_time,
225 &stream->time_base));
226 printf("duration=%s\n", time_value_string(val_str, sizeof(val_str), stream->duration,
227 &stream->time_base));
228 if (stream->nb_frames)
229 printf("nb_frames=%"PRId64"\n", stream->nb_frames);
230
231 while ((tag = av_dict_get(stream->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
232 printf("TAG:%s=%s\n", tag->key, tag->value);
233
234 printf("[/STREAM]\n");
235 }
236
237 static void show_format(AVFormatContext *fmt_ctx)
238 {
239 AVDictionaryEntry *tag = NULL;
240 char val_str[128];
241
242 printf("[FORMAT]\n");
243
244 printf("filename=%s\n", fmt_ctx->filename);
245 printf("nb_streams=%d\n", fmt_ctx->nb_streams);
246 printf("format_name=%s\n", fmt_ctx->iformat->name);
247 printf("format_long_name=%s\n", fmt_ctx->iformat->long_name);
248 printf("start_time=%s\n", time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time,
249 &AV_TIME_BASE_Q));
250 printf("duration=%s\n", time_value_string(val_str, sizeof(val_str), fmt_ctx->duration,
251 &AV_TIME_BASE_Q));
252 printf("size=%s\n", value_string(val_str, sizeof(val_str), fmt_ctx->file_size,
253 unit_byte_str));
254 printf("bit_rate=%s\n", value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate,
255 unit_bit_per_second_str));
256
257 while ((tag = av_dict_get(fmt_ctx->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
258 printf("TAG:%s=%s\n", tag->key, tag->value);
259
260 printf("[/FORMAT]\n");
261 }
262
263 static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
264 {
265 int err, i;
266 AVFormatContext *fmt_ctx = NULL;
267 AVDictionaryEntry *t;
268
269 if ((err = avformat_open_input(&fmt_ctx, filename, iformat, &format_opts)) < 0) {
270 print_error(filename, err);
271 return err;
272 }
273 if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
274 av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
275 return AVERROR_OPTION_NOT_FOUND;
276 }
277
278
279 /* fill the streams in the format context */
280 if ((err = avformat_find_stream_info(fmt_ctx, NULL)) < 0) {
281 print_error(filename, err);
282 return err;
283 }
284
285 av_dump_format(fmt_ctx, 0, filename, 0);
286
287 /* bind a decoder to each input stream */
288 for (i = 0; i < fmt_ctx->nb_streams; i++) {
289 AVStream *stream = fmt_ctx->streams[i];
290 AVCodec *codec;
291
292 if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
293 fprintf(stderr, "Unsupported codec with id %d for input stream %d\n",
294 stream->codec->codec_id, stream->index);
295 } else if (avcodec_open2(stream->codec, codec, NULL) < 0) {
296 fprintf(stderr, "Error while opening codec for input stream %d\n",
297 stream->index);
298 }
299 }
300
301 *fmt_ctx_ptr = fmt_ctx;
302 return 0;
303 }
304
305 static int probe_file(const char *filename)
306 {
307 AVFormatContext *fmt_ctx;
308 int ret, i;
309
310 if ((ret = open_input_file(&fmt_ctx, filename)))
311 return ret;
312
313 if (do_show_packets)
314 show_packets(fmt_ctx);
315
316 if (do_show_streams)
317 for (i = 0; i < fmt_ctx->nb_streams; i++)
318 show_stream(fmt_ctx, i);
319
320 if (do_show_format)
321 show_format(fmt_ctx);
322
323 av_close_input_file(fmt_ctx);
324 return 0;
325 }
326
327 static void show_usage(void)
328 {
329 printf("Simple multimedia streams analyzer\n");
330 printf("usage: %s [OPTIONS] [INPUT_FILE]\n", program_name);
331 printf("\n");
332 }
333
334 static int opt_format(const char *opt, const char *arg)
335 {
336 iformat = av_find_input_format(arg);
337 if (!iformat) {
338 fprintf(stderr, "Unknown input format: %s\n", arg);
339 return AVERROR(EINVAL);
340 }
341 return 0;
342 }
343
344 static void opt_input_file(const char *arg)
345 {
346 if (input_filename) {
347 fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
348 arg, input_filename);
349 exit(1);
350 }
351 if (!strcmp(arg, "-"))
352 arg = "pipe:";
353 input_filename = arg;
354 }
355
356 static void show_help(void)
357 {
358 const AVClass *class = avformat_get_class();
359 av_log_set_callback(log_callback_help);
360 show_usage();
361 show_help_options(options, "Main options:\n", 0, 0);
362 printf("\n");
363 av_opt_show2(&class, NULL,
364 AV_OPT_FLAG_DECODING_PARAM, 0);
365 }
366
367 static void opt_pretty(void)
368 {
369 show_value_unit = 1;
370 use_value_prefix = 1;
371 use_byte_value_binary_prefix = 1;
372 use_value_sexagesimal_format = 1;
373 }
374
375 static const OptionDef options[] = {
376 #include "cmdutils_common_opts.h"
377 { "f", HAS_ARG, {(void*)opt_format}, "force format", "format" },
378 { "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" },
379 { "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" },
380 { "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix},
381 "use binary prefixes for byte units" },
382 { "sexagesimal", OPT_BOOL, {(void*)&use_value_sexagesimal_format},
383 "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
384 { "pretty", 0, {(void*)&opt_pretty},
385 "prettify the format of displayed values, make it more human readable" },
386 { "show_format", OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
387 { "show_packets", OPT_BOOL, {(void*)&do_show_packets}, "show packets info" },
388 { "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" },
389 { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, {(void*)opt_default}, "generic catch all option", "" },
390 { NULL, },
391 };
392
393 int main(int argc, char **argv)
394 {
395 int ret;
396
397 av_register_all();
398 init_opts();
399 #if CONFIG_AVDEVICE
400 avdevice_register_all();
401 #endif
402
403 show_banner();
404 parse_options(argc, argv, options, opt_input_file);
405
406 if (!input_filename) {
407 show_usage();
408 fprintf(stderr, "You have to specify one input file.\n");
409 fprintf(stderr, "Use -h to get full help or, even better, run 'man %s'.\n", program_name);
410 exit(1);
411 }
412
413 ret = probe_file(input_filename);
414
415 return ret;
416 }