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