91c76633d59130234757fd219af975cb8c6af65d
[libam7xxx.git] / examples / am7xxx-play.c
1 /*
2  * am7xxx-play - play stuff on an am7xxx device (e.g. Acer C110, PicoPix 1020)
3  *
4  * Copyright (C) 2012-2014  Antonio Ospite <ao2@ao2.it>
5  *
6  * This program is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 /**
21  * @example examples/am7xxx-play.c
22  * am7xxx-play uses libavdevice, libavformat, libavcodec and libswscale to
23  * decode the input, encode it to jpeg and display it with libam7xxx.
24  */
25
26 #include <stdio.h>
27 #include <stdint.h>
28 #include <string.h>
29 #include <signal.h>
30 #include <getopt.h>
31
32 #include <libavdevice/avdevice.h>
33 #include <libavformat/avformat.h>
34 #include <libswscale/swscale.h>
35
36 #include <am7xxx.h>
37
38 /* On some systems ENOTSUP is not defined, fallback to its value on
39  * linux which is equal to EOPNOTSUPP which is 95
40  */
41 #ifndef ENOTSUP
42 #define ENOTSUP 95
43 #endif
44
45 static unsigned int run = 1;
46
47 struct video_input_ctx {
48         AVFormatContext *format_ctx;
49         AVCodecContext  *codec_ctx;
50         int video_stream_index;
51 };
52
53 static int video_input_init(struct video_input_ctx *input_ctx,
54                             const char *input_format_string,
55                             const char *input_path,
56                             AVDictionary **input_options)
57 {
58         AVInputFormat *input_format = NULL;
59         AVFormatContext *input_format_ctx;
60         AVCodecContext *input_codec_ctx;
61         AVCodec *input_codec;
62         int video_index;
63         unsigned int i;
64         int ret;
65
66         avdevice_register_all();
67         avcodec_register_all();
68         av_register_all();
69
70         if (input_format_string) {
71                 /* find the desired input format */
72                 input_format = av_find_input_format(input_format_string);
73                 if (input_format == NULL) {
74                         fprintf(stderr, "cannot find input format\n");
75                         ret = -ENODEV;
76                         goto out;
77                 }
78         }
79
80         if (input_path == NULL) {
81                 fprintf(stderr, "input_path must not be NULL!\n");
82                 ret = -EINVAL;
83                 goto out;
84         }
85
86         /* open the input format/device */
87         input_format_ctx = NULL;
88         ret = avformat_open_input(&input_format_ctx,
89                                   input_path,
90                                   input_format,
91                                   input_options);
92         if (ret < 0) {
93                 fprintf(stderr, "cannot open input format/device\n");
94                 goto out;
95         }
96
97         /* get information on the input stream (e.g. format, bitrate, framerate) */
98         ret = avformat_find_stream_info(input_format_ctx, NULL);
99         if (ret < 0) {
100                 fprintf(stderr, "cannot get information on the stream\n");
101                 goto cleanup;
102         }
103
104         /* dump what was found */
105         av_dump_format(input_format_ctx, 0, input_path, 0);
106
107         /* look for the first video_stream */
108         video_index = -1;
109         for (i = 0; i < input_format_ctx->nb_streams; i++)
110                 if (input_format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
111                         video_index = i;
112                         break;
113                 }
114         if (video_index == -1) {
115                 fprintf(stderr, "cannot find any video streams\n");
116                 ret = -ENOTSUP;
117                 goto cleanup;
118         }
119
120         /* get a pointer to the codec context for the video stream */
121         input_codec_ctx = input_format_ctx->streams[video_index]->codec;
122         if (input_codec_ctx == NULL) {
123                 fprintf(stderr, "input codec context is not valid\n");
124                 ret = -ENOTSUP;
125                 goto cleanup;
126         }
127
128         /* find the decoder for the video stream */
129         input_codec = avcodec_find_decoder(input_codec_ctx->codec_id);
130         if (input_codec == NULL) {
131                 fprintf(stderr, "input_codec is NULL!\n");
132                 ret = -ENOTSUP;
133                 goto cleanup;
134         }
135
136         /* open the decoder */
137         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
138         if (ret < 0) {
139                 fprintf(stderr, "cannot open input codec\n");
140                 ret = -ENOTSUP;
141                 goto cleanup;
142         }
143
144         input_ctx->format_ctx = input_format_ctx;
145         input_ctx->codec_ctx = input_codec_ctx;
146         input_ctx->video_stream_index = video_index;
147
148         ret = 0;
149         goto out;
150
151 cleanup:
152         avformat_close_input(&input_format_ctx);
153 out:
154         av_dict_free(input_options);
155         *input_options = NULL;
156         return ret;
157 }
158
159
160 struct video_output_ctx {
161         AVCodecContext  *codec_ctx;
162         int raw_output;
163 };
164
165 static int video_output_init(struct video_output_ctx *output_ctx,
166                              struct video_input_ctx *input_ctx,
167                              unsigned int upscale,
168                              unsigned int quality,
169                              am7xxx_image_format image_format,
170                              am7xxx_device *dev)
171 {
172         AVCodecContext *output_codec_ctx;
173         AVCodec *output_codec;
174         unsigned int new_output_width;
175         unsigned int new_output_height;
176         int ret;
177
178         if (input_ctx == NULL) {
179                 fprintf(stderr, "input_ctx must not be NULL!\n");
180                 ret = -EINVAL;
181                 goto out;
182         }
183
184         /* create the encoder context */
185         output_codec_ctx = avcodec_alloc_context3(NULL);
186         if (output_codec_ctx == NULL) {
187                 fprintf(stderr, "cannot allocate output codec context!\n");
188                 ret = -ENOMEM;
189                 goto out;
190         }
191
192         /* Calculate the new output dimension so the original picture is shown
193          * in its entirety */
194         ret = am7xxx_calc_scaled_image_dimensions(dev,
195                                                   upscale,
196                                                   (input_ctx->codec_ctx)->width,
197                                                   (input_ctx->codec_ctx)->height,
198                                                   &new_output_width,
199                                                   &new_output_height);
200         if (ret < 0) {
201                 fprintf(stderr, "cannot calculate output dimension\n");
202                 goto cleanup;
203         }
204
205         /* put sample parameters */
206         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
207         output_codec_ctx->width      = new_output_width;
208         output_codec_ctx->height     = new_output_height;
209         output_codec_ctx->time_base.num  =
210                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
211         output_codec_ctx->time_base.den  =
212                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
213
214         /* When the raw format is requested we don't actually need to setup
215          * and open a decoder
216          */
217         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
218                 fprintf(stdout, "using raw output format\n");
219                 output_codec_ctx->pix_fmt    = AV_PIX_FMT_NV12;
220                 output_ctx->codec_ctx = output_codec_ctx;
221                 output_ctx->raw_output = 1;
222                 ret = 0;
223                 goto out;
224         }
225
226         output_codec_ctx->pix_fmt    = AV_PIX_FMT_YUVJ420P;
227         output_codec_ctx->codec_id   = AV_CODEC_ID_MJPEG;
228         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
229
230         /* Set quality and other VBR settings */
231
232         /* @note: 'quality' is expected to be between 1 and 100, but a value
233          * between 0 to 99 has to be passed when calculating qmin and qmax.
234          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
235          * in particular they won't be 0, this is needed because they are used
236          * as divisor somewhere in the encoding process */
237         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
238         output_codec_ctx->mb_lmin    = output_codec_ctx->qmin * FF_QP2LAMBDA;
239         output_codec_ctx->mb_lmax    = output_codec_ctx->qmax * FF_QP2LAMBDA;
240         output_codec_ctx->flags      |= CODEC_FLAG_QSCALE;
241         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
242
243         /* find the encoder */
244         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
245         if (output_codec == NULL) {
246                 fprintf(stderr, "cannot find output codec!\n");
247                 ret = -ENOTSUP;
248                 goto cleanup;
249         }
250
251         /* open the codec */
252         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
253         if (ret < 0) {
254                 fprintf(stderr, "could not open output codec!\n");
255                 goto cleanup;
256         }
257
258         output_ctx->codec_ctx = output_codec_ctx;
259         output_ctx->raw_output = 0;
260
261         ret = 0;
262         goto out;
263
264 cleanup:
265         avcodec_close(output_codec_ctx);
266         av_free(output_codec_ctx);
267 out:
268         return ret;
269 }
270
271
272 static int am7xxx_play(const char *input_format_string,
273                        AVDictionary **input_options,
274                        const char *input_path,
275                        unsigned int rescale_method,
276                        unsigned int upscale,
277                        unsigned int quality,
278                        am7xxx_image_format image_format,
279                        am7xxx_device *dev,
280                        int dump_frame)
281 {
282         struct video_input_ctx input_ctx;
283         struct video_output_ctx output_ctx;
284         AVFrame *picture_raw;
285         AVFrame *picture_scaled;
286         int out_buf_size;
287         uint8_t *out_buf;
288         int out_picture_size;
289         uint8_t *out_picture;
290         struct SwsContext *sw_scale_ctx;
291         AVPacket in_packet;
292         AVPacket out_packet;
293         int got_picture;
294         int got_packet;
295         int ret;
296
297         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
298         if (ret < 0) {
299                 fprintf(stderr, "cannot initialize input\n");
300                 goto out;
301         }
302
303         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
304         if (ret < 0) {
305                 fprintf(stderr, "cannot initialize input\n");
306                 goto cleanup_input;
307         }
308
309         /* allocate an input frame */
310         picture_raw = av_frame_alloc();
311         if (picture_raw == NULL) {
312                 fprintf(stderr, "cannot allocate the raw picture frame!\n");
313                 ret = -ENOMEM;
314                 goto cleanup_output;
315         }
316
317         /* allocate output frame */
318         picture_scaled = av_frame_alloc();
319         if (picture_scaled == NULL) {
320                 fprintf(stderr, "cannot allocate the scaled picture!\n");
321                 ret = -ENOMEM;
322                 goto cleanup_picture_raw;
323         }
324         picture_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
325         picture_scaled->width = (output_ctx.codec_ctx)->width;
326         picture_scaled->height = (output_ctx.codec_ctx)->height;
327
328         /* calculate the bytes needed for the output image and create buffer for the output image */
329         out_buf_size = avpicture_get_size((output_ctx.codec_ctx)->pix_fmt,
330                                           (output_ctx.codec_ctx)->width,
331                                           (output_ctx.codec_ctx)->height);
332         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
333         if (out_buf == NULL) {
334                 fprintf(stderr, "cannot allocate output data buffer!\n");
335                 ret = -ENOMEM;
336                 goto cleanup_picture_scaled;
337         }
338
339         /* assign appropriate parts of buffer to image planes in picture_scaled */
340         avpicture_fill((AVPicture *)picture_scaled,
341                        out_buf,
342                        (output_ctx.codec_ctx)->pix_fmt,
343                        (output_ctx.codec_ctx)->width,
344                        (output_ctx.codec_ctx)->height);
345
346         sw_scale_ctx = sws_getCachedContext(NULL,
347                                             (input_ctx.codec_ctx)->width,
348                                             (input_ctx.codec_ctx)->height,
349                                             (input_ctx.codec_ctx)->pix_fmt,
350                                             (output_ctx.codec_ctx)->width,
351                                             (output_ctx.codec_ctx)->height,
352                                             (output_ctx.codec_ctx)->pix_fmt,
353                                             rescale_method,
354                                             NULL, NULL, NULL);
355         if (sw_scale_ctx == NULL) {
356                 fprintf(stderr, "cannot set up the rescaling context!\n");
357                 ret = -EINVAL;
358                 goto cleanup_out_buf;
359         }
360
361         got_packet = 0;
362         while (run) {
363                 /* read packet */
364                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
365                 if (ret < 0) {
366                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
367                                 ret = 0;
368                         else
369                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
370                         run = 0;
371                         goto end_while;
372                 }
373
374                 if (in_packet.stream_index != input_ctx.video_stream_index) {
375                         /* that is more or less a "continue", but there is
376                          * still the packet to free */
377                         goto end_while;
378                 }
379
380                 /* decode */
381                 got_picture = 0;
382                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
383                 if (ret < 0) {
384                         fprintf(stderr, "cannot decode video\n");
385                         run = 0;
386                         goto end_while;
387                 }
388
389                 /* if we got the complete frame */
390                 if (got_picture) {
391                         /* 
392                          * Rescaling the picture also changes its pixel format
393                          * to the raw format supported by the projector if
394                          * this was set in video_output_init()
395                          */
396                         sws_scale(sw_scale_ctx,
397                                   (const uint8_t * const *)picture_raw->data,
398                                   picture_raw->linesize,
399                                   0,
400                                   (input_ctx.codec_ctx)->height,
401                                   picture_scaled->data,
402                                   picture_scaled->linesize);
403
404                         if (output_ctx.raw_output) {
405                                 out_picture = out_buf;
406                                 out_picture_size = out_buf_size;
407                         } else {
408                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
409                                 av_init_packet(&out_packet);
410                                 out_packet.data = NULL;
411                                 out_packet.size = 0;
412                                 got_packet = 0;
413                                 ret = avcodec_encode_video2(output_ctx.codec_ctx,
414                                                             &out_packet,
415                                                             picture_scaled,
416                                                             &got_packet);
417                                 if (ret < 0 || !got_packet) {
418                                         fprintf(stderr, "cannot encode video\n");
419                                         run = 0;
420                                         goto end_while;
421                                 }
422
423                                 out_picture = out_packet.data;
424                                 out_picture_size = out_packet.size;
425                         }
426
427 #ifdef DEBUG
428                         if (dump_frame) {
429                                 char filename[NAME_MAX];
430                                 FILE *file;
431                                 if (!output_ctx.raw_output)
432                                         snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
433                                 else
434                                         snprintf(filename, NAME_MAX, "out.raw");
435                                 file = fopen(filename, "wb");
436                                 fwrite(out_picture, 1, out_picture_size, file);
437                                 fclose(file);
438                         }
439 #else
440                         (void) dump_frame;
441 #endif
442
443                         ret = am7xxx_send_image_async(dev,
444                                                       image_format,
445                                                       (output_ctx.codec_ctx)->width,
446                                                       (output_ctx.codec_ctx)->height,
447                                                       out_picture,
448                                                       out_picture_size);
449                         if (ret < 0) {
450                                 perror("am7xxx_send_image_async");
451                                 run = 0;
452                                 goto end_while;
453                         }
454                 }
455 end_while:
456                 if (!output_ctx.raw_output && got_packet)
457                         av_free_packet(&out_packet);
458                 av_free_packet(&in_packet);
459         }
460
461         sws_freeContext(sw_scale_ctx);
462 cleanup_out_buf:
463         av_free(out_buf);
464 cleanup_picture_scaled:
465         av_frame_free(&picture_scaled);
466 cleanup_picture_raw:
467         av_frame_free(&picture_raw);
468
469 cleanup_output:
470         /* av_free is needed as well,
471          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
472          */
473         avcodec_close(output_ctx.codec_ctx);
474         av_free(output_ctx.codec_ctx);
475
476 cleanup_input:
477         avcodec_close(input_ctx.codec_ctx);
478         avformat_close_input(&(input_ctx.format_ctx));
479
480 out:
481         return ret;
482 }
483
484 #ifdef HAVE_XCB
485 #include <xcb/xcb.h>
486 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
487 {
488         int i, screen_number;
489         xcb_connection_t *connection;
490         const xcb_setup_t *setup;
491         xcb_screen_iterator_t iter;
492
493         connection = xcb_connect(displayname, &screen_number);
494         if (xcb_connection_has_error(connection)) {
495                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
496                 return -EINVAL;
497         }
498
499         setup = xcb_get_setup(connection);
500         if (setup == NULL) {
501                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
502                 xcb_disconnect(connection);
503                 return -EINVAL;
504         }
505
506         iter = xcb_setup_roots_iterator(setup);
507         for (i = 0; i < screen_number; ++i) {
508                 xcb_screen_next(&iter);
509         }
510
511         xcb_screen_t *screen = iter.data;
512
513         *width = screen->width_in_pixels;
514         *height = screen->height_in_pixels;
515
516         xcb_disconnect(connection);
517
518         return 0;
519 }
520
521 static char *get_x_screen_size(const char *input_path)
522 {
523         int len;
524         int width;
525         int height;
526         char *screen_size;
527         int ret;
528
529         ret = x_get_screen_dimensions(input_path, &width, &height);
530         if (ret < 0) {
531                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
532                 return NULL;
533         }
534
535         len = snprintf(NULL, 0, "%dx%d", width, height);
536
537         screen_size = malloc((len + 1) * sizeof(char));
538         if (screen_size == NULL) {
539                 perror("malloc");
540                 return NULL;
541         }
542
543         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
544         if (len < 0) {
545                 free(screen_size);
546                 screen_size = NULL;
547                 return NULL;
548         }
549         return screen_size;
550 }
551 #else
552 static char *get_x_screen_size(const char *input_path)
553 {
554         (void) input_path;
555         fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
556         return strdup("vga");
557 }
558 #endif
559
560 static void unset_run(int signo)
561 {
562         (void) signo;
563         run = 0;
564 }
565
566 #ifdef HAVE_SIGACTION
567 static int set_signal_handler(void (*signal_handler)(int))
568 {
569         struct sigaction new_action;
570         struct sigaction old_action;
571         int ret;
572
573         new_action.sa_handler = signal_handler;
574         sigemptyset(&new_action.sa_mask);
575         new_action.sa_flags = 0;
576
577         ret = sigaction(SIGINT, NULL, &old_action);
578         if (ret < 0) {
579                 perror("sigaction on old_action");
580                 goto out;
581         }
582
583         if (old_action.sa_handler != SIG_IGN) {
584                 ret = sigaction(SIGINT, &new_action, NULL);
585                 if (ret < 0) {
586                         perror("sigaction on new_action");
587                         goto out;
588                 }
589         }
590
591 out:
592         return ret;
593 }
594 #else
595 static int set_signal_handler(void (*signal_handler)(int))
596 {
597         (void)signal_handler;
598         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
599         return 0;
600 }
601 #endif
602
603
604 static void usage(char *name)
605 {
606         printf("usage: %s [OPTIONS]\n\n", name);
607         printf("OPTIONS:\n");
608         printf("\t-d <index>\t\tthe device index (default is 0)\n");
609 #ifdef DEBUG
610         printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
611 #endif
612         printf("\t-f <input format>\tthe input device format\n");
613         printf("\t-i <input path>\t\tthe input path\n");
614         printf("\t-o <options>\t\ta comma separated list of input format options\n");
615         printf("\t\t\t\tEXAMPLE:\n");
616         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
617         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
618         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
619         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
620         printf("\t\t\t\tSUPPORTED FORMATS:\n");
621         printf("\t\t\t\t\t1 - JPEG\n");
622         printf("\t\t\t\t\t2 - NV12\n");
623         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
624         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
625         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
626                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
627         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
628         printf("\t\t\t\t         the slave connector to be plugged in.\n");
629         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
630                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
631         printf("\t-h \t\t\tthis help message\n");
632         printf("\n\nEXAMPLES OF USE:\n");
633         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
634         printf("\t%s -f fbdev -i /dev/fb0\n", name);
635         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
636         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
637 }
638
639 int main(int argc, char *argv[])
640 {
641         int ret;
642         int opt;
643         char *subopts;
644         char *subopts_saved;
645         char *subopt;
646         char *input_format_string = NULL;
647         AVDictionary *options = NULL;
648         char *input_path = NULL;
649         unsigned int rescale_method = SWS_BICUBIC;
650         unsigned int upscale = 0;
651         unsigned int quality = 95;
652         int log_level = AM7XXX_LOG_INFO;
653         int device_index = 0;
654         int power_mode = AM7XXX_POWER_LOW;
655         int zoom = AM7XXX_ZOOM_ORIGINAL;
656         int format = AM7XXX_IMAGE_FORMAT_JPEG;
657         am7xxx_context *ctx;
658         am7xxx_device *dev;
659         int dump_frame = 0;
660
661         while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
662                 switch (opt) {
663                 case 'd':
664                         device_index = atoi(optarg);
665                         if (device_index < 0) {
666                                 fprintf(stderr, "Unsupported device index\n");
667                                 ret = -EINVAL;
668                                 goto out;
669                         }
670                         break;
671                 case 'D':
672                         dump_frame = 1;
673 #ifndef DEBUG
674                         fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
675 #endif
676                         break;
677                 case 'f':
678                         input_format_string = strdup(optarg);
679                         break;
680                 case 'i':
681                         input_path = strdup(optarg);
682                         break;
683                 case 'o':
684 #ifdef HAVE_STRTOK_R
685                         /*
686                          * parse suboptions, the expected format is something
687                          * like:
688                          *   draw_mouse=1,framerate=100,video_size=800x480
689                          */
690                         subopts = subopts_saved = strdup(optarg);
691                         while ((subopt = strtok_r(subopts, ",", &subopts))) {
692                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
693                                 char *subopt_value = strtok_r(NULL, "", &subopt);
694                                 if (subopt_value == NULL) {
695                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
696                                         continue;
697                                 }
698                                 av_dict_set(&options, subopt_name, subopt_value, 0);
699                         }
700                         free(subopts_saved);
701 #else
702                         fprintf(stderr, "Option '-o' not implemented\n");
703 #endif
704                         break;
705                 case 's':
706                         rescale_method = atoi(optarg);
707                         switch(rescale_method) {
708                         case SWS_FAST_BILINEAR:
709                         case SWS_BILINEAR:
710                         case SWS_BICUBIC:
711                         case SWS_X:
712                         case SWS_POINT:
713                         case SWS_AREA:
714                         case SWS_BICUBLIN:
715                         case SWS_GAUSS:
716                         case SWS_SINC:
717                         case SWS_LANCZOS:
718                         case SWS_SPLINE:
719                                 break;
720                         default:
721                                 fprintf(stderr, "Unsupported rescale method\n");
722                                 ret = -EINVAL;
723                                 goto out;
724                         }
725                         break;
726                 case 'u':
727                         upscale = 1;
728                         break;
729                 case 'F':
730                         format = atoi(optarg);
731                         switch(format) {
732                         case AM7XXX_IMAGE_FORMAT_JPEG:
733                                 fprintf(stdout, "JPEG format\n");
734                                 break;
735                         case AM7XXX_IMAGE_FORMAT_NV12:
736                                 fprintf(stdout, "NV12 format\n");
737                                 break;
738                         default:
739                                 fprintf(stderr, "Unsupported format\n");
740                                 ret = -EINVAL;
741                                 goto out;
742                         }
743                         break;
744                 case 'q':
745                         quality = atoi(optarg);
746                         if (quality < 1 || quality > 100) {
747                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
748                                 ret = -EINVAL;
749                                 goto out;
750                         }
751                         break;
752                 case 'l':
753                         log_level = atoi(optarg);
754                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
755                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
756                                 log_level = AM7XXX_LOG_ERROR;
757                         }
758                         break;
759                 case 'p':
760                         power_mode = atoi(optarg);
761                         switch(power_mode) {
762                         case AM7XXX_POWER_OFF:
763                         case AM7XXX_POWER_LOW:
764                         case AM7XXX_POWER_MIDDLE:
765                         case AM7XXX_POWER_HIGH:
766                         case AM7XXX_POWER_TURBO:
767                                 fprintf(stdout, "Power mode: %d\n", power_mode);
768                                 break;
769                         default:
770                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
771                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
772                                 ret = -EINVAL;
773                                 goto out;
774                         }
775                         break;
776                 case 'z':
777                         zoom = atoi(optarg);
778                         switch(zoom) {
779                         case AM7XXX_ZOOM_ORIGINAL:
780                         case AM7XXX_ZOOM_H:
781                         case AM7XXX_ZOOM_H_V:
782                         case AM7XXX_ZOOM_TEST:
783                         case AM7XXX_ZOOM_TELE:
784                                 fprintf(stdout, "Zoom: %d\n", zoom);
785                                 break;
786                         default:
787                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
788                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
789                                 ret = -EINVAL;
790                                 goto out;
791                         }
792                         break;
793                 case 'h':
794                         usage(argv[0]);
795                         ret = 0;
796                         goto out;
797                 default: /* '?' */
798                         usage(argv[0]);
799                         ret = -EINVAL;
800                         goto out;
801                 }
802         }
803
804         if (input_path == NULL) {
805                 fprintf(stderr, "The -i option must always be passed\n\n");
806                 usage(argv[0]);
807                 ret = -EINVAL;
808                 goto out;
809         }
810
811         /*
812          * When the input format is 'x11grab' set some useful fallback options
813          * if not supplied by the user, in particular grab full screen
814          */
815         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
816                 char *video_size;
817
818                 video_size = get_x_screen_size(input_path);
819
820                 if (!av_dict_get(options, "video_size", NULL, 0))
821                         av_dict_set(&options, "video_size", video_size, 0);
822
823                 if (!av_dict_get(options, "framerate", NULL, 0))
824                         av_dict_set(&options, "framerate", "60", 0);
825
826                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
827                         av_dict_set(&options, "draw_mouse",  "1", 0);
828
829                 free(video_size);
830         }
831
832         ret = set_signal_handler(unset_run);
833         if (ret < 0) {
834                 perror("sigaction");
835                 goto out;
836         }
837
838         ret = am7xxx_init(&ctx);
839         if (ret < 0) {
840                 perror("am7xxx_init");
841                 goto out;
842         }
843
844         am7xxx_set_log_level(ctx, log_level);
845
846         ret = am7xxx_open_device(ctx, &dev, device_index);
847         if (ret < 0) {
848                 perror("am7xxx_open_device");
849                 goto cleanup;
850         }
851
852         ret = am7xxx_set_zoom_mode(dev, zoom);
853         if (ret < 0) {
854                 perror("am7xxx_set_zoom_mode");
855                 goto cleanup;
856         }
857
858         ret = am7xxx_set_power_mode(dev, power_mode);
859         if (ret < 0) {
860                 perror("am7xxx_set_power_mode");
861                 goto cleanup;
862         }
863
864         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
865         if (zoom == AM7XXX_ZOOM_TEST)
866                 goto cleanup;
867
868         ret = am7xxx_play(input_format_string,
869                           &options,
870                           input_path,
871                           rescale_method,
872                           upscale,
873                           quality,
874                           format,
875                           dev,
876                           dump_frame);
877         if (ret < 0) {
878                 fprintf(stderr, "am7xxx_play failed\n");
879                 goto cleanup;
880         }
881
882 cleanup:
883         am7xxx_shutdown(ctx);
884 out:
885         av_dict_free(&options);
886         free(input_path);
887         free(input_format_string);
888         return ret;
889 }