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 /* 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    = 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    = PIX_FMT_YUVJ420P;
 227         output_codec_ctx->codec_id   = 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->lmin = output_codec_ctx->qmin * FF_QP2LAMBDA;
 239         output_codec_ctx->mb_lmax    = output_codec_ctx->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 {
 281         struct video_input_ctx input_ctx;
 282         struct video_output_ctx output_ctx;
 283         AVFrame *picture_raw;
 284         AVFrame *picture_scaled;
 285         int out_buf_size;
 286         uint8_t *out_buf;
 287         int out_picture_size;
 288         uint8_t *out_picture;
 289         struct SwsContext *sw_scale_ctx;
 290         AVPacket in_packet;
 291         AVPacket out_packet;
 292         int got_picture;
 293         int got_packet;
 294         int ret = 0;
 295
 296         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
 297         if (ret < 0) {
 298                 fprintf(stderr, "cannot initialize input\n");
 299                 goto out;
 300         }
 301
 302         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
 303         if (ret < 0) {
 304                 fprintf(stderr, "cannot initialize input\n");
 305                 goto cleanup_input;
 306         }
 307
 308         /* allocate an input frame */
 309         picture_raw = avcodec_alloc_frame();
 310         if (picture_raw == NULL) {
 311                 fprintf(stderr, "cannot allocate the raw picture frame!\n");
 312                 ret = -ENOMEM;
 313                 goto cleanup_output;
 314         }
 315
 316         /* allocate output frame */
 317         picture_scaled = avcodec_alloc_frame();
 318         if (picture_scaled == NULL) {
 319                 fprintf(stderr, "cannot allocate the scaled picture!\n");
 320                 ret = -ENOMEM;
 321                 goto cleanup_picture_raw;
 322         }
 323
 324         /* calculate the bytes needed for the output image and create buffer for the output image */
 325         out_buf_size = avpicture_get_size((output_ctx.codec_ctx)->pix_fmt,
 326                                           (output_ctx.codec_ctx)->width,
 327                                           (output_ctx.codec_ctx)->height);
 328         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
 329         if (out_buf == NULL) {
 330                 fprintf(stderr, "cannot allocate output data buffer!\n");
 331                 ret = -ENOMEM;
 332                 goto cleanup_picture_scaled;
 333         }
 334
 335         /* assign appropriate parts of buffer to image planes in picture_scaled */
 336         avpicture_fill((AVPicture *)picture_scaled,
 337                        out_buf,
 338                        (output_ctx.codec_ctx)->pix_fmt,
 339                        (output_ctx.codec_ctx)->width,
 340                        (output_ctx.codec_ctx)->height);
 341
 342         sw_scale_ctx = sws_getCachedContext(NULL,
 343                                             (input_ctx.codec_ctx)->width,
 344                                             (input_ctx.codec_ctx)->height,
 345                                             (input_ctx.codec_ctx)->pix_fmt,
 346                                             (output_ctx.codec_ctx)->width,
 347                                             (output_ctx.codec_ctx)->height,
 348                                             (output_ctx.codec_ctx)->pix_fmt,
 349                                             rescale_method,
 350                                             NULL, NULL, NULL);
 351         if (sw_scale_ctx == NULL) {
 352                 fprintf(stderr, "cannot set up the rescaling context!\n");
 353                 ret = -EINVAL;
 354                 goto cleanup_out_buf;
 355         }
 356
 357         while (run) {
 358                 /* read packet */
 359                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
 360                 if (ret < 0) {
 361                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 362                                 ret = 0;
 363                         else
 364                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 365                         run = 0;
 366                         goto end_while;
 367                 }
 368
 369                 if (in_packet.stream_index != input_ctx.video_stream_index) {
 370                         /* that is more or less a "continue", but there is
 371                          * still the packet to free */
 372                         goto end_while;
 373                 }
 374
 375                 /* decode */
 376                 got_picture = 0;
 377                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
 378                 if (ret < 0) {
 379                         fprintf(stderr, "cannot decode video\n");
 380                         run = 0;
 381                         goto end_while;
 382                 }
 383
 384                 /* if we get the complete frame */
 385                 if (got_picture) {
 386                         /* convert it to YUV */
 387                         sws_scale(sw_scale_ctx,
 388                                   (const uint8_t * const*)picture_raw->data,
 389                                   picture_raw->linesize,
 390                                   0,
 391                                   (input_ctx.codec_ctx)->height,
 392                                   picture_scaled->data,
 393                                   picture_scaled->linesize);
 394
 395                         if (output_ctx.raw_output) {
 396                                 out_picture = out_buf;
 397                                 out_picture_size = out_buf_size;
 398                         } else {
 399                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 400                                 av_init_packet(&out_packet);
 401                                 out_packet.data = NULL;
 402                                 out_packet.size = 0;
 403                                 got_packet = 0;
 404                                 ret = avcodec_encode_video2(output_ctx.codec_ctx,
 405                                                             &out_packet,
 406                                                             picture_scaled,
 407                                                             &got_packet);
 408                                 if (ret < 0 || !got_packet) {
 409                                         fprintf(stderr, "cannot encode video\n");
 410                                         run = 0;
 411                                         goto end_while;
 412                                 }
 413
 414                                 out_picture = out_packet.data;
 415                                 out_picture_size = out_packet.size;
 416                         }
 417
 418 #ifdef DEBUG
 419                         char filename[NAME_MAX];
 420                         FILE *file;
 421                         if (!output_ctx.raw_output)
 422                                 snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 423                         else
 424                                 snprintf(filename, NAME_MAX, "out.raw");
 425                         file = fopen(filename, "wb");
 426                         fwrite(out_picture, 1, out_picture_size, file);
 427                         fclose(file);
 428 #endif
 429
 430                         ret = am7xxx_send_image(dev,
 431                                                 image_format,
 432                                                 (output_ctx.codec_ctx)->width,
 433                                                 (output_ctx.codec_ctx)->height,
 434                                                 out_picture,
 435                                                 out_picture_size);
 436                         if (ret < 0) {
 437                                 perror("am7xxx_send_image");
 438                                 run = 0;
 439                                 goto end_while;
 440                         }
 441                 }
 442 end_while:
 443                 if (!output_ctx.raw_output)
 444                         av_free_packet(&out_packet);
 445                 av_free_packet(&in_packet);
 446         }
 447
 448         sws_freeContext(sw_scale_ctx);
 449 cleanup_out_buf:
 450         av_free(out_buf);
 451 cleanup_picture_scaled:
 452         av_free(picture_scaled);
 453 cleanup_picture_raw:
 454         av_free(picture_raw);
 455
 456 cleanup_output:
 457         /* av_free is needed as well,
 458          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
 459          */
 460         avcodec_close(output_ctx.codec_ctx);
 461         av_free(output_ctx.codec_ctx);
 462
 463 cleanup_input:
 464         avcodec_close(input_ctx.codec_ctx);
 465         avformat_close_input(&(input_ctx.format_ctx));
 466
 467 out:
 468         return ret;
 469 }
 470
 471 #ifdef HAVE_XCB
 472 #include <xcb/xcb.h>
 473 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 474 {
 475         int i, screen_number;
 476         xcb_connection_t *connection;
 477         const xcb_setup_t *setup;
 478         xcb_screen_iterator_t iter;
 479
 480         connection = xcb_connect(displayname, &screen_number);
 481         if (xcb_connection_has_error(connection)) {
 482                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 483                 return -EINVAL;
 484         }
 485
 486         setup = xcb_get_setup(connection);
 487         if (setup == NULL) {
 488                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 489                 xcb_disconnect(connection);
 490                 return -EINVAL;
 491         }
 492
 493         iter = xcb_setup_roots_iterator(setup);
 494         for (i = 0; i < screen_number; ++i) {
 495                 xcb_screen_next(&iter);
 496         }
 497
 498         xcb_screen_t *screen = iter.data;
 499
 500         *width = screen->width_in_pixels;
 501         *height = screen->height_in_pixels;
 502
 503         xcb_disconnect(connection);
 504
 505         return 0;
 506 }
 507
 508 static char *get_x_screen_size(const char *input_path)
 509 {
 510         int len;
 511         int width;
 512         int height;
 513         char *screen_size;
 514         int ret;
 515
 516         ret = x_get_screen_dimensions(input_path, &width, &height);
 517         if (ret < 0) {
 518                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 519                 return NULL;
 520         }
 521
 522         len = snprintf(NULL, 0, "%dx%d", width, height);
 523
 524         screen_size = malloc((len + 1) * sizeof(char));
 525         if (screen_size == NULL) {
 526                 perror("malloc");
 527                 return NULL;
 528         }
 529
 530         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 531         if (len < 0) {
 532                 free(screen_size);
 533                 screen_size = NULL;
 534                 return NULL;
 535         }
 536         return screen_size;
 537 }
 538 #else
 539 static char *get_x_screen_size(const char *input_path)
 540 {
 541         (void) input_path;
 542         fprintf(stderr, "%s: fallback implementation\n", __func__);
 543         return strdup("vga");
 544 }
 545 #endif
 546
 547 static void unset_run(int signo)
 548 {
 549         (void) signo;
 550         run = 0;
 551 }
 552
 553 #ifdef HAVE_SIGACTION
 554 static int set_signal_handler(void (*signal_handler)(int))
 555 {
 556         struct sigaction new_action;
 557         struct sigaction old_action;
 558         int ret = 0;
 559
 560         new_action.sa_handler = signal_handler;
 561         sigemptyset(&new_action.sa_mask);
 562         new_action.sa_flags = 0;
 563
 564         ret = sigaction(SIGINT, NULL, &old_action);
 565         if (ret < 0) {
 566                 perror("sigaction on old_action");
 567                 goto out;
 568         }
 569
 570         if (old_action.sa_handler != SIG_IGN) {
 571                 ret = sigaction(SIGINT, &new_action, NULL);
 572                 if (ret < 0) {
 573                         perror("sigaction on new_action");
 574                         goto out;
 575                 }
 576         }
 577
 578 out:
 579         return ret;
 580 }
 581 #else
 582 static int set_signal_handler(void (*signal_handler)(int))
 583 {
 584         (void)signal_handler;
 585         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
 586         return 0;
 587 }
 588 #endif
 589
 590
 591 static void usage(char *name)
 592 {
 593         printf("usage: %s [OPTIONS]\n\n", name);
 594         printf("OPTIONS:\n");
 595         printf("\t-d <index>\t\tthe device index (default is 0)\n");
 596         printf("\t-f <input format>\tthe input device format\n");
 597         printf("\t-i <input path>\t\tthe input path\n");
 598         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 599         printf("\t\t\t\tEXAMPLE:\n");
 600         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 601         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 602         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 603         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 604         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 605         printf("\t\t\t\t\t1 - JPEG\n");
 606         printf("\t\t\t\t\t2 - NV12\n");
 607         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 608         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 609         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
 610                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 611         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
 612         printf("\t\t\t\t         the slave connector to be plugged in.\n");
 613         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (test)\n",
 614                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
 615         printf("\t-h \t\t\tthis help message\n");
 616         printf("\n\nEXAMPLES OF USE:\n");
 617         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 618         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 619         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 620         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 621 }
 622
 623 int main(int argc, char *argv[])
 624 {
 625         int ret;
 626         int opt;
 627         char *subopts;
 628         char *subopts_saved;
 629         char *subopt;
 630         char *input_format_string = NULL;
 631         AVDictionary *options = NULL;
 632         char *input_path = NULL;
 633         unsigned int rescale_method = SWS_BICUBIC;
 634         unsigned int upscale = 0;
 635         unsigned int quality = 95;
 636         int log_level = AM7XXX_LOG_INFO;
 637         int device_index = 0;
 638         am7xxx_power_mode power_mode = AM7XXX_POWER_LOW;
 639         am7xxx_zoom_mode zoom = AM7XXX_ZOOM_ORIGINAL;
 640         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 641         am7xxx_context *ctx;
 642         am7xxx_device *dev;
 643
 644         while ((opt = getopt(argc, argv, "d:f:i:o:s:uF:q:l:p:z:h")) != -1) {
 645                 switch (opt) {
 646                 case 'd':
 647                         device_index = atoi(optarg);
 648                         if (device_index < 0) {
 649                                 fprintf(stderr, "Unsupported device index\n");
 650                                 ret = -EINVAL;
 651                                 goto out;
 652                         }
 653                         break;
 654                 case 'f':
 655                         input_format_string = strdup(optarg);
 656                         break;
 657                 case 'i':
 658                         input_path = strdup(optarg);
 659                         break;
 660                 case 'o':
 661 #ifdef HAVE_STRTOK_R
 662                         /*
 663                          * parse suboptions, the expected format is something
 664                          * like:
 665                          *   draw_mouse=1,framerate=100,video_size=800x480
 666                          */
 667                         subopts = subopts_saved = strdup(optarg);
 668                         while((subopt = strtok_r(subopts, ",", &subopts))) {
 669                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 670                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 671                                 if (subopt_value == NULL) {
 672                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 673                                         continue;
 674                                 }
 675                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 676                         }
 677                         free(subopts_saved);
 678 #else
 679                         fprintf(stderr, "Option '-o' not implemented\n");
 680 #endif
 681                         break;
 682                 case 's':
 683                         rescale_method = atoi(optarg);
 684                         switch(rescale_method) {
 685                         case SWS_FAST_BILINEAR:
 686                         case SWS_BILINEAR:
 687                         case SWS_BICUBIC:
 688                         case SWS_X:
 689                         case SWS_POINT:
 690                         case SWS_AREA:
 691                         case SWS_BICUBLIN:
 692                         case SWS_GAUSS:
 693                         case SWS_SINC:
 694                         case SWS_LANCZOS:
 695                         case SWS_SPLINE:
 696                                 break;
 697                         default:
 698                                 fprintf(stderr, "Unsupported rescale method\n");
 699                                 ret = -EINVAL;
 700                                 goto out;
 701                         }
 702                         break;
 703                 case 'u':
 704                         upscale = 1;
 705                         break;
 706                 case 'F':
 707                         format = atoi(optarg);
 708                         switch(format) {
 709                         case AM7XXX_IMAGE_FORMAT_JPEG:
 710                                 fprintf(stdout, "JPEG format\n");
 711                                 break;
 712                         case AM7XXX_IMAGE_FORMAT_NV12:
 713                                 fprintf(stdout, "NV12 format\n");
 714                                 break;
 715                         default:
 716                                 fprintf(stderr, "Unsupported format\n");
 717                                 ret = -EINVAL;
 718                                 goto out;
 719                         }
 720                         break;
 721                 case 'q':
 722                         quality = atoi(optarg);
 723                         if (quality < 1 || quality > 100) {
 724                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 725                                 ret = -EINVAL;
 726                                 goto out;
 727                         }
 728                         break;
 729                 case 'l':
 730                         log_level = atoi(optarg);
 731                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 732                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 733                                 log_level = AM7XXX_LOG_ERROR;
 734                         }
 735                         break;
 736                 case 'p':
 737                         power_mode = atoi(optarg);
 738                         switch(power_mode) {
 739                         case AM7XXX_POWER_OFF:
 740                         case AM7XXX_POWER_LOW:
 741                         case AM7XXX_POWER_MIDDLE:
 742                         case AM7XXX_POWER_HIGH:
 743                         case AM7XXX_POWER_TURBO:
 744                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 745                                 break;
 746                         default:
 747                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 748                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 749                                 ret = -EINVAL;
 750                                 goto out;
 751                         }
 752                         break;
 753                 case 'z':
 754                         zoom = atoi(optarg);
 755                         switch(zoom) {
 756                         case AM7XXX_ZOOM_ORIGINAL:
 757                         case AM7XXX_ZOOM_H:
 758                         case AM7XXX_ZOOM_H_V:
 759                         case AM7XXX_ZOOM_TEST:
 760                                 fprintf(stdout, "Zoom: %d\n", zoom);
 761                                 break;
 762                         default:
 763                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 764                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
 765                                 exit(EXIT_FAILURE);
 766                         }
 767                         break;
 768                 case 'h':
 769                         usage(argv[0]);
 770                         ret = 0;
 771                         goto out;
 772                 default: /* '?' */
 773                         usage(argv[0]);
 774                         ret = -EINVAL;
 775                         goto out;
 776                 }
 777         }
 778
 779         if (input_path == NULL) {
 780                 fprintf(stderr, "The -i option must always be passed\n\n");
 781                 usage(argv[0]);
 782                 ret = -EINVAL;
 783                 goto out;
 784         }
 785
 786         /*
 787          * When the input format is 'x11grab' set some useful fallback options
 788          * if not supplied by the user, in particular grab full screen
 789          */
 790         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 791                 char *video_size;
 792
 793                 video_size = get_x_screen_size(input_path);
 794
 795                 if (!av_dict_get(options, "video_size", NULL, 0))
 796                         av_dict_set(&options, "video_size", video_size, 0);
 797
 798                 if (!av_dict_get(options, "framerate", NULL, 0))
 799                         av_dict_set(&options, "framerate", "60", 0);
 800
 801                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 802                         av_dict_set(&options, "draw_mouse",  "1", 0);
 803
 804                 free(video_size);
 805         }
 806
 807         ret = set_signal_handler(unset_run);
 808         if (ret < 0) {
 809                 perror("sigaction");
 810                 goto out;
 811         }
 812
 813         ret = am7xxx_init(&ctx);
 814         if (ret < 0) {
 815                 perror("am7xxx_init");
 816                 goto out;
 817         }
 818
 819         am7xxx_set_log_level(ctx, log_level);
 820
 821         ret = am7xxx_open_device(ctx, &dev, device_index);
 822         if (ret < 0) {
 823                 perror("am7xxx_open_device");
 824                 goto cleanup;
 825         }
 826
 827         ret = am7xxx_set_zoom_mode(dev, zoom);
 828         if (ret < 0) {
 829                 perror("am7xxx_set_zoom_mode");
 830                 goto cleanup;
 831         }
 832
 833         ret = am7xxx_set_power_mode(dev, power_mode);
 834         if (ret < 0) {
 835                 perror("am7xxx_set_power_mode");
 836                 goto cleanup;
 837         }
 838
 839         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 840         if (zoom == AM7XXX_ZOOM_TEST)
 841                 goto cleanup;
 842
 843         ret = am7xxx_play(input_format_string,
 844                           &options,
 845                           input_path,
 846                           rescale_method,
 847                           upscale,
 848                           quality,
 849                           format,
 850                           dev);
 851         if (ret < 0) {
 852                 fprintf(stderr, "am7xxx_play failed\n");
 853                 goto cleanup;
 854         }
 855
 856 cleanup:
 857         am7xxx_shutdown(ctx);
 858 out:
 859         av_dict_free(&options);
 860         free(input_path);
 861         free(input_format_string);
 862         return ret;
 863 }