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