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         AVCodecParameters *input_codec_params;
  55         AVCodecContext *input_codec_ctx;
  56         AVCodec *input_codec;
  57         int video_index;
  58         unsigned int i;
  59         int ret;
  60
  61         avdevice_register_all();
  62         avcodec_register_all();
  63         av_register_all();
  64
  65         if (input_format_string) {
  66                 /* find the desired input format */
  67                 input_format = av_find_input_format(input_format_string);
  68                 if (input_format == NULL) {
  69                         fprintf(stderr, "cannot find input format\n");
  70                         ret = -ENODEV;
  71                         goto out;
  72                 }
  73         }
  74
  75         if (input_path == NULL) {
  76                 fprintf(stderr, "input_path must not be NULL!\n");
  77                 ret = -EINVAL;
  78                 goto out;
  79         }
  80
  81         /* open the input format/device */
  82         input_format_ctx = NULL;
  83         ret = avformat_open_input(&input_format_ctx,
  84                                   input_path,
  85                                   input_format,
  86                                   input_options);
  87         if (ret < 0) {
  88                 fprintf(stderr, "cannot open input format/device\n");
  89                 goto out;
  90         }
  91
  92         /* get information on the input stream (e.g. format, bitrate, framerate) */
  93         ret = avformat_find_stream_info(input_format_ctx, NULL);
  94         if (ret < 0) {
  95                 fprintf(stderr, "cannot get information on the stream\n");
  96                 goto cleanup;
  97         }
  98
  99         /* dump what was found */
 100         av_dump_format(input_format_ctx, 0, input_path, 0);
 101
 102         /* look for the first video_stream */
 103         video_index = -1;
 104         for (i = 0; i < input_format_ctx->nb_streams; i++)
 105                 if (input_format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
 106                         video_index = i;
 107                         break;
 108                 }
 109         if (video_index == -1) {
 110                 fprintf(stderr, "cannot find any video streams\n");
 111                 ret = -EINVAL;
 112                 goto cleanup;
 113         }
 114
 115         /* get a pointer to the codec parameters for the video stream */
 116         input_codec_params = input_format_ctx->streams[video_index]->codecpar;
 117
 118         /* find the decoder for the video stream */
 119         input_codec = avcodec_find_decoder(input_codec_params->codec_id);
 120         if (input_codec == NULL) {
 121                 fprintf(stderr, "input_codec is NULL!\n");
 122                 ret = -EINVAL;
 123                 goto cleanup;
 124         }
 125
 126         input_codec_ctx = avcodec_alloc_context3(input_codec);
 127         if (input_codec_ctx == NULL) {
 128                 fprintf(stderr, "failed to allocate the input codec context\n");
 129                 ret = -ENOMEM;
 130                 goto cleanup;
 131         }
 132
 133         ret = avcodec_parameters_to_context(input_codec_ctx, input_codec_params);
 134         if (ret < 0) {
 135                 fprintf(stderr, "cannot copy parameters to input codec context\n");
 136                 goto cleanup_ctx;
 137         }
 138
 139         /* open the decoder */
 140         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
 141         if (ret < 0) {
 142                 fprintf(stderr, "cannot open input codec\n");
 143                 goto cleanup_ctx;
 144         }
 145
 146         input_ctx->format_ctx = input_format_ctx;
 147         input_ctx->codec_ctx = input_codec_ctx;
 148         input_ctx->video_stream_index = video_index;
 149
 150         ret = 0;
 151         goto out;
 152
 153 cleanup_ctx:
 154         avcodec_free_context(&input_codec_ctx);
 155 cleanup:
 156         avformat_close_input(&input_format_ctx);
 157 out:
 158         av_dict_free(input_options);
 159         *input_options = NULL;
 160         return ret;
 161 }
 162
 163
 164 struct video_output_ctx {
 165         AVCodecContext  *codec_ctx;
 166         int raw_output;
 167 };
 168
 169 static int video_output_init(struct video_output_ctx *output_ctx,
 170                              struct video_input_ctx *input_ctx,
 171                              unsigned int upscale,
 172                              unsigned int quality,
 173                              am7xxx_image_format image_format,
 174                              am7xxx_device *dev)
 175 {
 176         AVCodecContext *output_codec_ctx;
 177         AVCodec *output_codec;
 178         unsigned int new_output_width;
 179         unsigned int new_output_height;
 180         int ret;
 181
 182         if (input_ctx == NULL) {
 183                 fprintf(stderr, "input_ctx must not be NULL!\n");
 184                 ret = -EINVAL;
 185                 goto out;
 186         }
 187
 188         /* create the encoder context */
 189         output_codec_ctx = avcodec_alloc_context3(NULL);
 190         if (output_codec_ctx == NULL) {
 191                 fprintf(stderr, "cannot allocate output codec context!\n");
 192                 ret = -ENOMEM;
 193                 goto out;
 194         }
 195
 196         /* Calculate the new output dimension so the original picture is shown
 197          * in its entirety */
 198         ret = am7xxx_calc_scaled_image_dimensions(dev,
 199                                                   upscale,
 200                                                   (input_ctx->codec_ctx)->width,
 201                                                   (input_ctx->codec_ctx)->height,
 202                                                   &new_output_width,
 203                                                   &new_output_height);
 204         if (ret < 0) {
 205                 fprintf(stderr, "cannot calculate output dimension\n");
 206                 goto cleanup;
 207         }
 208
 209         /* put sample parameters */
 210         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
 211         output_codec_ctx->width      = new_output_width;
 212         output_codec_ctx->height     = new_output_height;
 213         output_codec_ctx->time_base.num  =
 214                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
 215         output_codec_ctx->time_base.den  =
 216                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
 217
 218         /* When the raw format is requested we don't actually need to setup
 219          * and open a decoder
 220          */
 221         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
 222                 fprintf(stdout, "using raw output format\n");
 223                 output_codec_ctx->pix_fmt    = AV_PIX_FMT_NV12;
 224                 output_ctx->codec_ctx = output_codec_ctx;
 225                 output_ctx->raw_output = 1;
 226                 ret = 0;
 227                 goto out;
 228         }
 229
 230         output_codec_ctx->pix_fmt    = AV_PIX_FMT_YUVJ420P;
 231         output_codec_ctx->codec_id   = AV_CODEC_ID_MJPEG;
 232         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
 233
 234         /* Set quality and other VBR settings */
 235
 236         /* @note: 'quality' is expected to be between 1 and 100, but a value
 237          * between 0 to 99 has to be passed when calculating qmin and qmax.
 238          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
 239          * in particular they won't be 0, this is needed because they are used
 240          * as divisor somewhere in the encoding process */
 241         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
 242         output_codec_ctx->mb_lmin    = output_codec_ctx->qmin * FF_QP2LAMBDA;
 243         output_codec_ctx->mb_lmax    = output_codec_ctx->qmax * FF_QP2LAMBDA;
 244         output_codec_ctx->flags      |= AV_CODEC_FLAG_QSCALE;
 245         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
 246
 247         /* find the encoder */
 248         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
 249         if (output_codec == NULL) {
 250                 fprintf(stderr, "cannot find output codec!\n");
 251                 ret = -EINVAL;
 252                 goto cleanup;
 253         }
 254
 255         /* open the codec */
 256         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
 257         if (ret < 0) {
 258                 fprintf(stderr, "could not open output codec!\n");
 259                 goto cleanup;
 260         }
 261
 262         output_ctx->codec_ctx = output_codec_ctx;
 263         output_ctx->raw_output = 0;
 264
 265         ret = 0;
 266         goto out;
 267
 268 cleanup:
 269         avcodec_close(output_codec_ctx);
 270         avcodec_free_context(&output_codec_ctx);
 271 out:
 272         return ret;
 273 }
 274
 275
 276 static int am7xxx_play(const char *input_format_string,
 277                        AVDictionary **input_options,
 278                        const char *input_path,
 279                        unsigned int rescale_method,
 280                        unsigned int upscale,
 281                        unsigned int quality,
 282                        am7xxx_image_format image_format,
 283                        am7xxx_device *dev,
 284                        int dump_frame)
 285 {
 286         struct video_input_ctx input_ctx;
 287         struct video_output_ctx output_ctx;
 288         AVFrame *picture_raw;
 289         AVFrame *picture_scaled;
 290         int out_buf_size;
 291         uint8_t *out_buf;
 292         int out_picture_size;
 293         uint8_t *out_picture;
 294         struct SwsContext *sw_scale_ctx;
 295         AVPacket in_packet;
 296         AVPacket out_packet;
 297         int got_picture;
 298         int got_packet;
 299         int ret;
 300
 301         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
 302         if (ret < 0) {
 303                 fprintf(stderr, "cannot initialize input\n");
 304                 goto out;
 305         }
 306
 307         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
 308         if (ret < 0) {
 309                 fprintf(stderr, "cannot initialize input\n");
 310                 goto cleanup_input;
 311         }
 312
 313         /* allocate an input frame */
 314         picture_raw = av_frame_alloc();
 315         if (picture_raw == NULL) {
 316                 fprintf(stderr, "cannot allocate the raw picture frame!\n");
 317                 ret = -ENOMEM;
 318                 goto cleanup_output;
 319         }
 320
 321         /* allocate output frame */
 322         picture_scaled = av_frame_alloc();
 323         if (picture_scaled == NULL) {
 324                 fprintf(stderr, "cannot allocate the scaled picture!\n");
 325                 ret = -ENOMEM;
 326                 goto cleanup_picture_raw;
 327         }
 328         picture_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
 329         picture_scaled->width = (output_ctx.codec_ctx)->width;
 330         picture_scaled->height = (output_ctx.codec_ctx)->height;
 331
 332         /* calculate the bytes needed for the output image and create buffer for the output image */
 333         out_buf_size = av_image_get_buffer_size((output_ctx.codec_ctx)->pix_fmt,
 334                                                 (output_ctx.codec_ctx)->width,
 335                                                 (output_ctx.codec_ctx)->height,
 336                                                 1);
 337         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
 338         if (out_buf == NULL) {
 339                 fprintf(stderr, "cannot allocate output data buffer!\n");
 340                 ret = -ENOMEM;
 341                 goto cleanup_picture_scaled;
 342         }
 343
 344         /* assign appropriate parts of buffer to image planes in picture_scaled */
 345         av_image_fill_arrays(picture_scaled->data,
 346                              picture_scaled->linesize,
 347                              out_buf,
 348                              (output_ctx.codec_ctx)->pix_fmt,
 349                              (output_ctx.codec_ctx)->width,
 350                              (output_ctx.codec_ctx)->height,
 351                              1);
 352
 353         sw_scale_ctx = sws_getCachedContext(NULL,
 354                                             (input_ctx.codec_ctx)->width,
 355                                             (input_ctx.codec_ctx)->height,
 356                                             (input_ctx.codec_ctx)->pix_fmt,
 357                                             (output_ctx.codec_ctx)->width,
 358                                             (output_ctx.codec_ctx)->height,
 359                                             (output_ctx.codec_ctx)->pix_fmt,
 360                                             rescale_method,
 361                                             NULL, NULL, NULL);
 362         if (sw_scale_ctx == NULL) {
 363                 fprintf(stderr, "cannot set up the rescaling context!\n");
 364                 ret = -EINVAL;
 365                 goto cleanup_out_buf;
 366         }
 367
 368         got_packet = 0;
 369         while (run) {
 370                 /* read packet */
 371                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
 372                 if (ret < 0) {
 373                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 374                                 ret = 0;
 375                         else
 376                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 377                         run = 0;
 378                         goto end_while;
 379                 }
 380
 381                 if (in_packet.stream_index != input_ctx.video_stream_index) {
 382                         /* that is more or less a "continue", but there is
 383                          * still the packet to free */
 384                         goto end_while;
 385                 }
 386
 387                 /* decode */
 388                 got_picture = 0;
 389                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
 390                 if (ret < 0) {
 391                         fprintf(stderr, "cannot decode video\n");
 392                         run = 0;
 393                         goto end_while;
 394                 }
 395
 396                 /* if we got the complete frame */
 397                 if (got_picture) {
 398                         /*
 399                          * Rescaling the picture also changes its pixel format
 400                          * to the raw format supported by the projector if
 401                          * this was set in video_output_init()
 402                          */
 403                         sws_scale(sw_scale_ctx,
 404                                   (const uint8_t * const *)picture_raw->data,
 405                                   picture_raw->linesize,
 406                                   0,
 407                                   (input_ctx.codec_ctx)->height,
 408                                   picture_scaled->data,
 409                                   picture_scaled->linesize);
 410
 411                         if (output_ctx.raw_output) {
 412                                 out_picture = out_buf;
 413                                 out_picture_size = out_buf_size;
 414                         } else {
 415                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 416                                 av_init_packet(&out_packet);
 417                                 out_packet.data = NULL;
 418                                 out_packet.size = 0;
 419                                 got_packet = 0;
 420                                 ret = avcodec_encode_video2(output_ctx.codec_ctx,
 421                                                             &out_packet,
 422                                                             picture_scaled,
 423                                                             &got_packet);
 424                                 if (ret < 0 || !got_packet) {
 425                                         fprintf(stderr, "cannot encode video\n");
 426                                         run = 0;
 427                                         goto end_while;
 428                                 }
 429
 430                                 out_picture = out_packet.data;
 431                                 out_picture_size = out_packet.size;
 432                         }
 433
 434 #ifdef DEBUG
 435                         if (dump_frame) {
 436                                 char filename[NAME_MAX];
 437                                 FILE *file;
 438                                 if (!output_ctx.raw_output)
 439                                         snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 440                                 else
 441                                         snprintf(filename, NAME_MAX, "out.raw");
 442                                 file = fopen(filename, "wb");
 443                                 fwrite(out_picture, 1, out_picture_size, file);
 444                                 fclose(file);
 445                         }
 446 #else
 447                         (void) dump_frame;
 448 #endif
 449
 450                         ret = am7xxx_send_image_async(dev,
 451                                                       image_format,
 452                                                       (output_ctx.codec_ctx)->width,
 453                                                       (output_ctx.codec_ctx)->height,
 454                                                       out_picture,
 455                                                       out_picture_size);
 456                         if (ret < 0) {
 457                                 perror("am7xxx_send_image_async");
 458                                 run = 0;
 459                                 goto end_while;
 460                         }
 461                 }
 462 end_while:
 463                 if (!output_ctx.raw_output && got_packet)
 464                         av_packet_unref(&out_packet);
 465                 av_packet_unref(&in_packet);
 466         }
 467
 468         sws_freeContext(sw_scale_ctx);
 469 cleanup_out_buf:
 470         av_free(out_buf);
 471 cleanup_picture_scaled:
 472         av_frame_free(&picture_scaled);
 473 cleanup_picture_raw:
 474         av_frame_free(&picture_raw);
 475
 476 cleanup_output:
 477         /* Freeing the codec context is needed as well,
 478          * see https://libav.org/documentation/doxygen/master/group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f
 479          */
 480         avcodec_close(output_ctx.codec_ctx);
 481         avcodec_free_context(&(output_ctx.codec_ctx));
 482
 483 cleanup_input:
 484         avcodec_close(input_ctx.codec_ctx);
 485         avcodec_free_context(&(input_ctx.codec_ctx));
 486         avformat_close_input(&(input_ctx.format_ctx));
 487
 488 out:
 489         return ret;
 490 }
 491
 492 #ifdef HAVE_XCB
 493 #include <xcb/xcb.h>
 494 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 495 {
 496         int i, screen_number;
 497         xcb_connection_t *connection;
 498         const xcb_setup_t *setup;
 499         xcb_screen_iterator_t iter;
 500
 501         connection = xcb_connect(displayname, &screen_number);
 502         if (xcb_connection_has_error(connection)) {
 503                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 504                 return -EINVAL;
 505         }
 506
 507         setup = xcb_get_setup(connection);
 508         if (setup == NULL) {
 509                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 510                 xcb_disconnect(connection);
 511                 return -EINVAL;
 512         }
 513
 514         iter = xcb_setup_roots_iterator(setup);
 515         for (i = 0; i < screen_number; ++i) {
 516                 xcb_screen_next(&iter);
 517         }
 518
 519         xcb_screen_t *screen = iter.data;
 520
 521         *width = screen->width_in_pixels;
 522         *height = screen->height_in_pixels;
 523
 524         xcb_disconnect(connection);
 525
 526         return 0;
 527 }
 528
 529 static char *get_x_screen_size(const char *input_path)
 530 {
 531         int len;
 532         int width;
 533         int height;
 534         char *screen_size;
 535         int ret;
 536
 537         ret = x_get_screen_dimensions(input_path, &width, &height);
 538         if (ret < 0) {
 539                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 540                 return NULL;
 541         }
 542
 543         len = snprintf(NULL, 0, "%dx%d", width, height);
 544
 545         screen_size = malloc((len + 1) * sizeof(char));
 546         if (screen_size == NULL) {
 547                 perror("malloc");
 548                 return NULL;
 549         }
 550
 551         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 552         if (len < 0) {
 553                 free(screen_size);
 554                 screen_size = NULL;
 555                 return NULL;
 556         }
 557         return screen_size;
 558 }
 559 #else
 560 static char *get_x_screen_size(const char *input_path)
 561 {
 562         (void) input_path;
 563         fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
 564         return strdup("vga");
 565 }
 566 #endif
 567
 568 static void unset_run(int signo)
 569 {
 570         (void) signo;
 571         run = 0;
 572 }
 573
 574 #ifdef HAVE_SIGACTION
 575 static int set_signal_handler(void (*signal_handler)(int))
 576 {
 577         struct sigaction new_action;
 578         struct sigaction old_action;
 579         int ret;
 580
 581         new_action.sa_handler = signal_handler;
 582         sigemptyset(&new_action.sa_mask);
 583         new_action.sa_flags = 0;
 584
 585         ret = sigaction(SIGINT, NULL, &old_action);
 586         if (ret < 0) {
 587                 perror("sigaction on old_action");
 588                 goto out;
 589         }
 590
 591         if (old_action.sa_handler != SIG_IGN) {
 592                 ret = sigaction(SIGINT, &new_action, NULL);
 593                 if (ret < 0) {
 594                         perror("sigaction on new_action");
 595                         goto out;
 596                 }
 597         }
 598
 599 out:
 600         return ret;
 601 }
 602 #else
 603 static int set_signal_handler(void (*signal_handler)(int))
 604 {
 605         (void)signal_handler;
 606         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
 607         return 0;
 608 }
 609 #endif
 610
 611
 612 static void usage(char *name)
 613 {
 614         printf("usage: %s [OPTIONS]\n\n", name);
 615         printf("OPTIONS:\n");
 616         printf("\t-d <index>\t\tthe device index (default is 0)\n");
 617 #ifdef DEBUG
 618         printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
 619 #endif
 620         printf("\t-f <input format>\tthe input device format\n");
 621         printf("\t-i <input path>\t\tthe input path\n");
 622         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 623         printf("\t\t\t\tEXAMPLE:\n");
 624         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 625         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 626         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 627         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 628         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 629         printf("\t\t\t\t\t1 - JPEG\n");
 630         printf("\t\t\t\t\t2 - NV12\n");
 631         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 632         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 633         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
 634                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 635         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
 636         printf("\t\t\t\t         the slave connector to be plugged in.\n");
 637         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
 638                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 639         printf("\t-h \t\t\tthis help message\n");
 640         printf("\n\nEXAMPLES OF USE:\n");
 641         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 642         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 643         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 644         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 645 }
 646
 647 int main(int argc, char *argv[])
 648 {
 649         int ret;
 650         int opt;
 651         char *subopts;
 652         char *subopts_saved;
 653         char *subopt;
 654         char *input_format_string = NULL;
 655         AVDictionary *options = NULL;
 656         char *input_path = NULL;
 657         unsigned int rescale_method = SWS_BICUBIC;
 658         unsigned int upscale = 0;
 659         unsigned int quality = 95;
 660         int log_level = AM7XXX_LOG_INFO;
 661         int device_index = 0;
 662         int power_mode = AM7XXX_POWER_LOW;
 663         int zoom = AM7XXX_ZOOM_ORIGINAL;
 664         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 665         am7xxx_context *ctx;
 666         am7xxx_device *dev;
 667         int dump_frame = 0;
 668
 669         while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
 670                 switch (opt) {
 671                 case 'd':
 672                         device_index = atoi(optarg);
 673                         if (device_index < 0) {
 674                                 fprintf(stderr, "Unsupported device index\n");
 675                                 ret = -EINVAL;
 676                                 goto out;
 677                         }
 678                         break;
 679                 case 'D':
 680                         dump_frame = 1;
 681 #ifndef DEBUG
 682                         fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
 683 #endif
 684                         break;
 685                 case 'f':
 686                         input_format_string = strdup(optarg);
 687                         break;
 688                 case 'i':
 689                         input_path = strdup(optarg);
 690                         break;
 691                 case 'o':
 692 #ifdef HAVE_STRTOK_R
 693                         /*
 694                          * parse suboptions, the expected format is something
 695                          * like:
 696                          *   draw_mouse=1,framerate=100,video_size=800x480
 697                          */
 698                         subopts = subopts_saved = strdup(optarg);
 699                         while ((subopt = strtok_r(subopts, ",", &subopts))) {
 700                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 701                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 702                                 if (subopt_value == NULL) {
 703                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 704                                         continue;
 705                                 }
 706                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 707                         }
 708                         free(subopts_saved);
 709 #else
 710                         fprintf(stderr, "Option '-o' not implemented\n");
 711 #endif
 712                         break;
 713                 case 's':
 714                         rescale_method = atoi(optarg);
 715                         switch(rescale_method) {
 716                         case SWS_FAST_BILINEAR:
 717                         case SWS_BILINEAR:
 718                         case SWS_BICUBIC:
 719                         case SWS_X:
 720                         case SWS_POINT:
 721                         case SWS_AREA:
 722                         case SWS_BICUBLIN:
 723                         case SWS_GAUSS:
 724                         case SWS_SINC:
 725                         case SWS_LANCZOS:
 726                         case SWS_SPLINE:
 727                                 break;
 728                         default:
 729                                 fprintf(stderr, "Unsupported rescale method\n");
 730                                 ret = -EINVAL;
 731                                 goto out;
 732                         }
 733                         break;
 734                 case 'u':
 735                         upscale = 1;
 736                         break;
 737                 case 'F':
 738                         format = atoi(optarg);
 739                         switch(format) {
 740                         case AM7XXX_IMAGE_FORMAT_JPEG:
 741                                 fprintf(stdout, "JPEG format\n");
 742                                 break;
 743                         case AM7XXX_IMAGE_FORMAT_NV12:
 744                                 fprintf(stdout, "NV12 format\n");
 745                                 break;
 746                         default:
 747                                 fprintf(stderr, "Unsupported format\n");
 748                                 ret = -EINVAL;
 749                                 goto out;
 750                         }
 751                         break;
 752                 case 'q':
 753                         quality = atoi(optarg);
 754                         if (quality < 1 || quality > 100) {
 755                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 756                                 ret = -EINVAL;
 757                                 goto out;
 758                         }
 759                         break;
 760                 case 'l':
 761                         log_level = atoi(optarg);
 762                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 763                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 764                                 log_level = AM7XXX_LOG_ERROR;
 765                         }
 766                         break;
 767                 case 'p':
 768                         power_mode = atoi(optarg);
 769                         switch(power_mode) {
 770                         case AM7XXX_POWER_OFF:
 771                         case AM7XXX_POWER_LOW:
 772                         case AM7XXX_POWER_MIDDLE:
 773                         case AM7XXX_POWER_HIGH:
 774                         case AM7XXX_POWER_TURBO:
 775                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 776                                 break;
 777                         default:
 778                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 779                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 780                                 ret = -EINVAL;
 781                                 goto out;
 782                         }
 783                         break;
 784                 case 'z':
 785                         zoom = atoi(optarg);
 786                         switch(zoom) {
 787                         case AM7XXX_ZOOM_ORIGINAL:
 788                         case AM7XXX_ZOOM_H:
 789                         case AM7XXX_ZOOM_H_V:
 790                         case AM7XXX_ZOOM_TEST:
 791                         case AM7XXX_ZOOM_TELE:
 792                                 fprintf(stdout, "Zoom: %d\n", zoom);
 793                                 break;
 794                         default:
 795                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 796                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 797                                 ret = -EINVAL;
 798                                 goto out;
 799                         }
 800                         break;
 801                 case 'h':
 802                         usage(argv[0]);
 803                         ret = 0;
 804                         goto out;
 805                 default: /* '?' */
 806                         usage(argv[0]);
 807                         ret = -EINVAL;
 808                         goto out;
 809                 }
 810         }
 811
 812         if (input_path == NULL) {
 813                 fprintf(stderr, "The -i option must always be passed\n\n");
 814                 usage(argv[0]);
 815                 ret = -EINVAL;
 816                 goto out;
 817         }
 818
 819         /*
 820          * When the input format is 'x11grab' set some useful fallback options
 821          * if not supplied by the user, in particular grab full screen
 822          */
 823         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 824                 char *video_size;
 825
 826                 video_size = get_x_screen_size(input_path);
 827
 828                 if (!av_dict_get(options, "video_size", NULL, 0))
 829                         av_dict_set(&options, "video_size", video_size, 0);
 830
 831                 if (!av_dict_get(options, "framerate", NULL, 0))
 832                         av_dict_set(&options, "framerate", "60", 0);
 833
 834                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 835                         av_dict_set(&options, "draw_mouse",  "1", 0);
 836
 837                 free(video_size);
 838         }
 839
 840         ret = set_signal_handler(unset_run);
 841         if (ret < 0) {
 842                 perror("sigaction");
 843                 goto out;
 844         }
 845
 846         ret = am7xxx_init(&ctx);
 847         if (ret < 0) {
 848                 perror("am7xxx_init");
 849                 goto out;
 850         }
 851
 852         am7xxx_set_log_level(ctx, log_level);
 853
 854         ret = am7xxx_open_device(ctx, &dev, device_index);
 855         if (ret < 0) {
 856                 perror("am7xxx_open_device");
 857                 goto cleanup;
 858         }
 859
 860         ret = am7xxx_set_zoom_mode(dev, zoom);
 861         if (ret < 0) {
 862                 perror("am7xxx_set_zoom_mode");
 863                 goto cleanup;
 864         }
 865
 866         ret = am7xxx_set_power_mode(dev, power_mode);
 867         if (ret < 0) {
 868                 perror("am7xxx_set_power_mode");
 869                 goto cleanup;
 870         }
 871
 872         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 873         if (zoom == AM7XXX_ZOOM_TEST)
 874                 goto cleanup;
 875
 876         ret = am7xxx_play(input_format_string,
 877                           &options,
 878                           input_path,
 879                           rescale_method,
 880                           upscale,
 881                           quality,
 882                           format,
 883                           dev,
 884                           dump_frame);
 885         if (ret < 0) {
 886                 fprintf(stderr, "am7xxx_play failed\n");
 887                 goto cleanup;
 888         }
 889
 890 cleanup:
 891         am7xxx_shutdown(ctx);
 892 out:
 893         av_dict_free(&options);
 894         free(input_path);
 895         free(input_format_string);
 896         return ret;
 897 }