examples/am7xxx-play.c

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