54f92e9c1c9b4e89bd1fda739d859ff5ad537ef6
[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  Antonio Ospite <ospite@studenti.unina.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 static unsigned int run = 1;
39
40 struct video_input_ctx {
41         AVFormatContext *format_ctx;
42         AVCodecContext  *codec_ctx;
43         int video_stream_index;
44 };
45
46 static int video_input_init(struct video_input_ctx *input_ctx,
47                             const char *input_format_string,
48                             const char *input_path,
49                             AVDictionary **input_options)
50 {
51         AVInputFormat *input_format = NULL;
52         AVFormatContext *input_format_ctx;
53         AVCodecContext *input_codec_ctx;
54         AVCodec *input_codec;
55         int video_index;
56         unsigned int i;
57         int ret;
58
59         avdevice_register_all();
60         avcodec_register_all();
61         av_register_all();
62
63         if (input_format_string) {
64                 /* find the desired input format */
65                 input_format = av_find_input_format(input_format_string);
66                 if (input_format == NULL) {
67                         fprintf(stderr, "cannot find input format\n");
68                         ret = -ENODEV;
69                         goto out;
70                 }
71         }
72
73         if (input_path == NULL) {
74                 fprintf(stderr, "input_path must not be NULL!\n");
75                 ret = -EINVAL;
76                 goto out;
77         }
78
79         /* open the input format/device */
80         input_format_ctx = NULL;
81         ret = avformat_open_input(&input_format_ctx,
82                                   input_path,
83                                   input_format,
84                                   input_options);
85         if (ret < 0) {
86                 fprintf(stderr, "cannot open input format/device\n");
87                 goto out;
88         }
89
90         /* get information on the input stream (e.g. format, bitrate, framerate) */
91         ret = avformat_find_stream_info(input_format_ctx, NULL);
92         if (ret < 0) {
93                 fprintf(stderr, "cannot get information on the stream\n");
94                 goto cleanup;
95         }
96
97         /* dump what was found */
98         av_dump_format(input_format_ctx, 0, input_path, 0);
99
100         /* look for the first video_stream */
101         video_index = -1;
102         for (i = 0; i < input_format_ctx->nb_streams; i++)
103                 if (input_format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
104                         video_index = i;
105                         break;
106                 }
107         if (video_index == -1) {
108                 fprintf(stderr, "cannot find any video streams\n");
109                 ret = -ENOTSUP;
110                 goto cleanup;
111         }
112
113         /* get a pointer to the codec context for the video stream */
114         input_codec_ctx = input_format_ctx->streams[video_index]->codec;
115         if (input_codec_ctx == NULL) {
116                 fprintf(stderr, "input codec context is not valid\n");
117                 ret = -ENOTSUP;
118                 goto cleanup;
119         }
120
121         /* find the decoder for the video stream */
122         input_codec = avcodec_find_decoder(input_codec_ctx->codec_id);
123         if (input_codec == NULL) {
124                 fprintf(stderr, "input_codec is NULL!\n");
125                 ret = -ENOTSUP;
126                 goto cleanup;
127         }
128
129         /* open the decoder */
130         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
131         if (ret < 0) {
132                 fprintf(stderr, "cannot open input codec\n");
133                 ret = -ENOTSUP;
134                 goto cleanup;
135         }
136
137         input_ctx->format_ctx = input_format_ctx;
138         input_ctx->codec_ctx = input_codec_ctx;
139         input_ctx->video_stream_index = video_index;
140
141         ret = 0;
142         goto out;
143
144 cleanup:
145         avformat_close_input(&input_format_ctx);
146 out:
147         av_dict_free(input_options);
148         *input_options = NULL;
149         return ret;
150 }
151
152
153 struct video_output_ctx {
154         AVCodecContext  *codec_ctx;
155         int raw_output;
156 };
157
158 static int video_output_init(struct video_output_ctx *output_ctx,
159                              struct video_input_ctx *input_ctx,
160                              unsigned int upscale,
161                              unsigned int quality,
162                              am7xxx_image_format image_format,
163                              am7xxx_device *dev)
164 {
165         AVCodecContext *output_codec_ctx;
166         AVCodec *output_codec;
167         unsigned int new_output_width;
168         unsigned int new_output_height;
169         int ret;
170
171         if (input_ctx == NULL) {
172                 fprintf(stderr, "input_ctx must not be NULL!\n");
173                 ret = -EINVAL;
174                 goto out;
175         }
176
177         /* create the encoder context */
178         output_codec_ctx = avcodec_alloc_context3(NULL);
179         if (output_codec_ctx == NULL) {
180                 fprintf(stderr, "cannot allocate output codec context!\n");
181                 ret = -ENOMEM;
182                 goto out;
183         }
184
185         /* Calculate the new output dimension so the original picture is shown
186          * in its entirety */
187         ret = am7xxx_calc_scaled_image_dimensions(dev,
188                                                   upscale,
189                                                   (input_ctx->codec_ctx)->width,
190                                                   (input_ctx->codec_ctx)->height,
191                                                   &new_output_width,
192                                                   &new_output_height);
193         if (ret < 0) {
194                 fprintf(stderr, "cannot calculate output dimension\n");
195                 goto cleanup;
196         }
197
198         /* put sample parameters */
199         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
200         output_codec_ctx->width      = new_output_width;
201         output_codec_ctx->height     = new_output_height;
202         output_codec_ctx->time_base.num  = (input_ctx->codec_ctx)->time_base.num;
203         output_codec_ctx->time_base.den  = (input_ctx->codec_ctx)->time_base.den;
204
205         /* When the raw format is requested we don't actually need to setup
206          * and open a decoder
207          */
208         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
209                 fprintf(stdout, "using raw output format\n");
210                 output_codec_ctx->pix_fmt    = PIX_FMT_NV12;
211                 output_ctx->codec_ctx = output_codec_ctx;
212                 output_ctx->raw_output = 1;
213                 ret = 0;
214                 goto out;
215         }
216
217         output_codec_ctx->pix_fmt    = PIX_FMT_YUVJ420P;
218         output_codec_ctx->codec_id   = CODEC_ID_MJPEG;
219         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
220
221         /* Set quality and other VBR settings */
222
223         /* @note: 'quality' is expected to be between 1 and 100, but a value
224          * between 0 to 99 has to be passed when calculating qmin and qmax.
225          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
226          * in particular they won't be 0, this is needed because they are used
227          * as divisor somewhere in the encoding process */
228         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
229         output_codec_ctx->mb_lmin    = output_codec_ctx->lmin = output_codec_ctx->qmin * FF_QP2LAMBDA;
230         output_codec_ctx->mb_lmax    = output_codec_ctx->lmax = output_codec_ctx->qmax * FF_QP2LAMBDA;
231         output_codec_ctx->flags      |= CODEC_FLAG_QSCALE;
232         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
233
234         /* find the encoder */
235         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
236         if (output_codec == NULL) {
237                 fprintf(stderr, "cannot find output codec!\n");
238                 ret = -ENOTSUP;
239                 goto cleanup;
240         }
241
242         /* open the codec */
243         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
244         if (ret < 0) {
245                 fprintf(stderr, "could not open output codec!\n");
246                 goto cleanup;
247         }
248
249         output_ctx->codec_ctx = output_codec_ctx;
250         output_ctx->raw_output = 0;
251
252         ret = 0;
253         goto out;
254
255 cleanup:
256         avcodec_close(output_codec_ctx);
257         av_free(output_codec_ctx);
258 out:
259         return ret;
260 }
261
262
263 static int am7xxx_play(const char *input_format_string,
264                        AVDictionary **input_options,
265                        const char *input_path,
266                        unsigned int rescale_method,
267                        unsigned int upscale,
268                        unsigned int quality,
269                        am7xxx_image_format image_format,
270                        am7xxx_device *dev)
271 {
272         struct video_input_ctx input_ctx;
273         struct video_output_ctx output_ctx;
274         AVFrame *picture_raw;
275         AVFrame *picture_scaled;
276         int out_buf_size;
277         uint8_t *out_buf;
278         int out_picture_size;
279         struct SwsContext *sw_scale_ctx;
280         AVPacket packet;
281         int got_picture;
282         int ret = 0;
283
284         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
285         if (ret < 0) {
286                 fprintf(stderr, "cannot initialize input\n");
287                 goto out;
288         }
289
290         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
291         if (ret < 0) {
292                 fprintf(stderr, "cannot initialize input\n");
293                 goto cleanup_input;
294         }
295
296         /* allocate an input frame */
297         picture_raw = avcodec_alloc_frame();
298         if (picture_raw == NULL) {
299                 fprintf(stderr, "cannot allocate the raw picture frame!\n");
300                 ret = -ENOMEM;
301                 goto cleanup_output;
302         }
303
304         /* allocate output frame */
305         picture_scaled = avcodec_alloc_frame();
306         if (picture_scaled == NULL) {
307                 fprintf(stderr, "cannot allocate the scaled picture!\n");
308                 ret = -ENOMEM;
309                 goto cleanup_picture_raw;
310         }
311
312         /* calculate the bytes needed for the output image and create buffer for the output image */
313         out_buf_size = avpicture_get_size((output_ctx.codec_ctx)->pix_fmt,
314                                           (output_ctx.codec_ctx)->width,
315                                           (output_ctx.codec_ctx)->height);
316         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
317         if (out_buf == NULL) {
318                 fprintf(stderr, "cannot allocate output data buffer!\n");
319                 ret = -ENOMEM;
320                 goto cleanup_picture_scaled;
321         }
322
323         /* assign appropriate parts of buffer to image planes in picture_scaled */
324         avpicture_fill((AVPicture *)picture_scaled,
325                        out_buf,
326                        (output_ctx.codec_ctx)->pix_fmt,
327                        (output_ctx.codec_ctx)->width,
328                        (output_ctx.codec_ctx)->height);
329
330         sw_scale_ctx = sws_getCachedContext(NULL,
331                                             (input_ctx.codec_ctx)->width,
332                                             (input_ctx.codec_ctx)->height,
333                                             (input_ctx.codec_ctx)->pix_fmt,
334                                             (output_ctx.codec_ctx)->width,
335                                             (output_ctx.codec_ctx)->height,
336                                             (output_ctx.codec_ctx)->pix_fmt,
337                                             rescale_method,
338                                             NULL, NULL, NULL);
339         if (sw_scale_ctx == NULL) {
340                 fprintf(stderr, "cannot set up the rescaling context!\n");
341                 ret = -EINVAL;
342                 goto cleanup_out_buf;
343         }
344
345         while (run) {
346                 /* read packet */
347                 ret = av_read_frame(input_ctx.format_ctx, &packet);
348                 if (ret < 0) {
349                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
350                                 ret = 0;
351                         else
352                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
353                         run = 0;
354                         goto end_while;
355                 }
356
357                 if (packet.stream_index != input_ctx.video_stream_index) {
358                         /* that is more or less a "continue", but there is
359                          * still the packet to free */
360                         goto end_while;
361                 }
362
363                 /* decode */
364                 got_picture = 0;
365                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &packet);
366                 if (ret < 0) {
367                         fprintf(stderr, "cannot decode video\n");
368                         run = 0;
369                         goto end_while;
370                 }
371
372                 /* if we get the complete frame */
373                 if (got_picture) {
374                         /* convert it to YUV */
375                         sws_scale(sw_scale_ctx,
376                                   (const uint8_t * const*)picture_raw->data,
377                                   picture_raw->linesize,
378                                   0,
379                                   (input_ctx.codec_ctx)->height,
380                                   picture_scaled->data,
381                                   picture_scaled->linesize);
382
383                         if (output_ctx.raw_output) {
384                                 out_picture_size = out_buf_size;
385                         } else {
386                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
387                                 /* TODO: switch to avcodec_encode_video2() eventually */
388                                 out_picture_size = avcodec_encode_video(output_ctx.codec_ctx,
389                                                                         out_buf,
390                                                                         out_buf_size,
391                                                                         picture_scaled);
392                                 if (out_picture_size < 0) {
393                                         fprintf(stderr, "cannot encode video\n");
394                                         ret = out_picture_size;
395                                         run = 0;
396                                         goto end_while;
397                                 }
398                         }
399
400 #ifdef DEBUG
401                         char filename[NAME_MAX];
402                         FILE *file;
403                         if (!output_ctx.raw_output)
404                                 snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
405                         else
406                                 snprintf(filename, NAME_MAX, "out.raw");
407                         file = fopen(filename, "wb");
408                         fwrite(out_buf, 1, out_picture_size, file);
409                         fclose(file);
410 #endif
411
412                         ret = am7xxx_send_image(dev,
413                                                 image_format,
414                                                 (output_ctx.codec_ctx)->width,
415                                                 (output_ctx.codec_ctx)->height,
416                                                 out_buf,
417                                                 out_picture_size);
418                         if (ret < 0) {
419                                 perror("am7xxx_send_image");
420                                 run = 0;
421                                 goto end_while;
422                         }
423                 }
424 end_while:
425                 av_free_packet(&packet);
426         }
427
428         sws_freeContext(sw_scale_ctx);
429 cleanup_out_buf:
430         av_free(out_buf);
431 cleanup_picture_scaled:
432         av_free(picture_scaled);
433 cleanup_picture_raw:
434         av_free(picture_raw);
435
436 cleanup_output:
437         /* av_free is needed as well,
438          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
439          */
440         avcodec_close(output_ctx.codec_ctx);
441         av_free(output_ctx.codec_ctx);
442
443 cleanup_input:
444         avcodec_close(input_ctx.codec_ctx);
445         avformat_close_input(&(input_ctx.format_ctx));
446
447 out:
448         return ret;
449 }
450
451 #ifdef HAVE_XCB
452 #include <xcb/xcb.h>
453 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
454 {
455         int i, screen_number;
456         xcb_connection_t *connection;
457         const xcb_setup_t *setup;
458         xcb_screen_iterator_t iter;
459
460         connection = xcb_connect(displayname, &screen_number);
461         if (xcb_connection_has_error(connection)) {
462                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
463                 return -EINVAL;
464         }
465
466         setup = xcb_get_setup(connection);
467         if (setup == NULL) {
468                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
469                 xcb_disconnect(connection);
470                 return -EINVAL;
471         }
472
473         iter = xcb_setup_roots_iterator(setup);
474         for (i = 0; i < screen_number; ++i) {
475                 xcb_screen_next(&iter);
476         }
477
478         xcb_screen_t *screen = iter.data;
479
480         *width = screen->width_in_pixels;
481         *height = screen->height_in_pixels;
482
483         xcb_disconnect(connection);
484
485         return 0;
486 }
487
488 static char *get_x_screen_size(const char *input_path)
489 {
490         int len;
491         int width;
492         int height;
493         char *screen_size;
494         int ret;
495
496         ret = x_get_screen_dimensions(input_path, &width, &height);
497         if (ret < 0) {
498                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
499                 return NULL;
500         }
501
502         len = snprintf(NULL, 0, "%dx%d", width, height);
503
504         screen_size = malloc((len + 1) * sizeof(char));
505         if (screen_size == NULL) {
506                 perror("malloc");
507                 return NULL;
508         }
509
510         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
511         if (len < 0) {
512                 free(screen_size);
513                 screen_size = NULL;
514                 return NULL;
515         }
516         return screen_size;
517 }
518 #else
519 static char *get_x_screen_size(const char *input_path)
520 {
521         (void) input_path;
522         fprintf(stderr, "%s: fallback implementation\n", __func__);
523         return strdup("vga");
524 }
525 #endif
526
527 static void unset_run(int signo)
528 {
529         (void) signo;
530         run = 0;
531 }
532
533 static int set_signal_handler(void (*signal_handler)(int))
534 {
535         struct sigaction new_action;
536         struct sigaction old_action;
537         int ret = 0;
538
539         new_action.sa_handler = signal_handler;
540         sigemptyset(&new_action.sa_mask);
541         new_action.sa_flags = 0;
542
543         ret = sigaction(SIGINT, NULL, &old_action);
544         if (ret < 0) {
545                 perror("sigaction on old_action");
546                 goto out;
547         }
548
549         if (old_action.sa_handler != SIG_IGN) {
550                 ret = sigaction(SIGINT, &new_action, NULL);
551                 if (ret < 0) {
552                         perror("sigaction on new_action");
553                         goto out;
554                 }
555         }
556
557 out:
558         return ret;
559 }
560
561 static void usage(char *name)
562 {
563         printf("usage: %s [OPTIONS]\n\n", name);
564         printf("OPTIONS:\n");
565         printf("\t-f <input format>\tthe input device format\n");
566         printf("\t-i <input path>\t\tthe input path\n");
567         printf("\t-o <options>\t\ta comma separated list of input format options\n");
568         printf("\t\t\t\tEXAMPLE:\n");
569         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
570         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
571         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
572         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
573         printf("\t\t\t\tSUPPORTED FORMATS:\n");
574         printf("\t\t\t\t\t1 - JPEG\n");
575         printf("\t\t\t\t\t2 - NV12\n");
576         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
577         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
578         printf("\t-p <power level>\tpower level of device, between %x (off) and %x (maximum)\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
579         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n\t\t\t\t\t the slave connector to be plugged in.\n");
580         printf("\t-h \t\t\tthis help message\n");
581         printf("\n\nEXAMPLES OF USE:\n");
582         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
583         printf("\t%s -f fbdev -i /dev/fb0\n", name);
584         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
585         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
586 }
587
588 int main(int argc, char *argv[])
589 {
590         int ret;
591         int opt;
592         char *subopts;
593         char *subopts_saved;
594         char *subopt;
595         char *input_format_string = NULL;
596         AVDictionary *options = NULL;
597         char *input_path = NULL;
598         unsigned int rescale_method = SWS_BICUBIC;
599         unsigned int upscale = 0;
600         unsigned int quality = 95;
601         int log_level = AM7XXX_LOG_INFO;
602         am7xxx_power_mode power_mode = AM7XXX_POWER_LOW;
603         int format = AM7XXX_IMAGE_FORMAT_JPEG;
604         am7xxx_context *ctx;
605         am7xxx_device *dev;
606
607         while ((opt = getopt(argc, argv, "f:i:o:s:uF:q:l:hp:")) != -1) {
608                 switch (opt) {
609                 case 'f':
610                         input_format_string = strdup(optarg);
611                         break;
612                 case 'i':
613                         input_path = strdup(optarg);
614                         break;
615                 case 'o':
616                         /*
617                          * parse suboptions, the expected format is something
618                          * like:
619                          *   draw_mouse=1,framerate=100,video_size=800x480
620                          */
621                         subopts = subopts_saved = strdup(optarg);
622                         while((subopt = strtok_r(subopts, ",", &subopts))) {
623                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
624                                 char *subopt_value = strtok_r(NULL, "", &subopt);
625                                 if (subopt_value == NULL) {
626                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
627                                         continue;
628                                 }
629                                 av_dict_set(&options, subopt_name, subopt_value, 0);
630                         }
631                         free(subopts_saved);
632                         break;
633                 case 's':
634                         rescale_method = atoi(optarg);
635                         switch(rescale_method) {
636                         case SWS_FAST_BILINEAR:
637                         case SWS_BILINEAR:
638                         case SWS_BICUBIC:
639                         case SWS_X:
640                         case SWS_POINT:
641                         case SWS_AREA:
642                         case SWS_BICUBLIN:
643                         case SWS_GAUSS:
644                         case SWS_SINC:
645                         case SWS_LANCZOS:
646                         case SWS_SPLINE:
647                                 break;
648                         default:
649                                 fprintf(stderr, "Unsupported rescale method\n");
650                                 ret = -EINVAL;
651                                 goto out;
652                         }
653                         break;
654                 case 'u':
655                         upscale = 1;
656                         break;
657                 case 'F':
658                         format = atoi(optarg);
659                         switch(format) {
660                         case AM7XXX_IMAGE_FORMAT_JPEG:
661                                 fprintf(stdout, "JPEG format\n");
662                                 break;
663                         case AM7XXX_IMAGE_FORMAT_NV12:
664                                 fprintf(stdout, "NV12 format\n");
665                                 break;
666                         default:
667                                 fprintf(stderr, "Unsupported format\n");
668                                 ret = -EINVAL;
669                                 goto out;
670                         }
671                         break;
672                 case 'q':
673                         quality = atoi(optarg);
674                         if (quality < 1 || quality > 100) {
675                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
676                                 ret = -EINVAL;
677                                 goto out;
678                         }
679                         break;
680                 case 'l':
681                         log_level = atoi(optarg);
682                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
683                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
684                                 log_level = AM7XXX_LOG_ERROR;
685                         }
686                         break;
687                 case 'h':
688                         usage(argv[0]);
689                         ret = 0;
690                         goto out;
691                         break;
692                 case 'p':
693                         power_mode = atoi(optarg);
694                         switch(power_mode) {
695                         case AM7XXX_POWER_OFF:
696                         case AM7XXX_POWER_LOW:
697                         case AM7XXX_POWER_MIDDLE:
698                         case AM7XXX_POWER_HIGH:
699                         case AM7XXX_POWER_TURBO:
700                                 fprintf(stdout, "Power mode: %x\n", power_mode);
701                                 break;
702                         default:
703                                 fprintf(stderr, "Invalid power mode value, must be between %x and %x\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
704                                 ret = -EINVAL;
705                                 goto out;
706                         }
707                         break;
708                 default: /* '?' */
709                         usage(argv[0]);
710                         ret = -EINVAL;
711                         goto out;
712                 }
713         }
714
715         if (input_path == NULL) {
716                 fprintf(stderr, "The -i option must always be passed\n");
717                 ret = -EINVAL;
718                 goto out;
719         }
720
721         /*
722          * When the input format is 'x11grab' set some useful fallback options
723          * if not supplied by the user, in particular grab full screen
724          */
725         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
726                 char *video_size;
727
728                 video_size = get_x_screen_size(input_path);
729
730                 if (!av_dict_get(options, "video_size", NULL, 0))
731                         av_dict_set(&options, "video_size", video_size, 0);
732
733                 if (!av_dict_get(options, "framerate", NULL, 0))
734                         av_dict_set(&options, "framerate", "60", 0);
735
736                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
737                         av_dict_set(&options, "draw_mouse",  "1", 0);
738
739                 free(video_size);
740         }
741
742         ret = set_signal_handler(unset_run);
743         if (ret < 0) {
744                 perror("sigaction");
745                 goto out;
746         }
747
748         ret = am7xxx_init(&ctx);
749         if (ret < 0) {
750                 perror("am7xxx_init");
751                 goto out;
752         }
753
754         am7xxx_set_log_level(ctx, log_level);
755
756         ret = am7xxx_open_device(ctx, &dev, 0);
757         if (ret < 0) {
758                 perror("am7xxx_open_device");
759                 goto cleanup;
760         }
761
762         ret = am7xxx_set_power_mode(dev, power_mode);
763         if (ret < 0) {
764                 perror("am7xxx_set_power_mode");
765                 goto cleanup;
766         }
767
768         ret = am7xxx_play(input_format_string,
769                           &options,
770                           input_path,
771                           rescale_method,
772                           upscale,
773                           quality,
774                           format,
775                           dev);
776         if (ret < 0) {
777                 fprintf(stderr, "am7xxx_play failed\n");
778                 goto cleanup;
779         }
780
781 cleanup:
782         am7xxx_shutdown(ctx);
783 out:
784         av_dict_free(&options);
785         free(input_path);
786         free(input_format_string);
787         return ret;
788 }