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