examples/am7xxx-play.c

   1 /*
   2  * am7xxx-play - play stuff on an am7xxx device (e.g. Acer C110, PicoPix 1020)
   3  *
   4  * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /**
  21  * @example examples/am7xxx-play.c
  22  * am7xxx-play uses libavdevice, libavformat, libavcodec and libswscale to
  23  * decode the input, encode it to jpeg and display it with libam7xxx.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdint.h>
  28 #include <string.h>
  29 #include <signal.h>
  30 #include <getopt.h>
  31
  32 #include <libavdevice/avdevice.h>
  33 #include <libavformat/avformat.h>
  34 #include <libswscale/swscale.h>
  35
  36 #include <am7xxx.h>
  37
  38 static unsigned int run = 1;
  39
  40 struct video_input_ctx {
  41         AVFormatContext *format_ctx;
  42         AVCodecContext  *codec_ctx;
  43         int video_stream_index;
  44 };
  45
  46 static int video_input_init(struct video_input_ctx *input_ctx,
  47                             const char *input_format_string,
  48                             const char *input_path,
  49                             AVDictionary **input_options)
  50 {
  51         AVInputFormat *input_format = NULL;
  52         AVFormatContext *input_format_ctx;
  53         AVCodecContext *input_codec_ctx;
  54         AVCodec *input_codec;
  55         int video_index;
  56         unsigned int i;
  57         int ret;
  58
  59         avdevice_register_all();
  60         avcodec_register_all();
  61         av_register_all();
  62
  63         if (input_format_string) {
  64                 /* find the desired input format */
  65                 input_format = av_find_input_format(input_format_string);
  66                 if (input_format == NULL) {
  67                         fprintf(stderr, "cannot find input format\n");
  68                         ret = -ENODEV;
  69                         goto out;
  70                 }
  71         }
  72
  73         if (input_path == NULL) {
  74                 fprintf(stderr, "input_path must not be NULL!\n");
  75                 ret = -EINVAL;
  76                 goto out;
  77         }
  78
  79         /* open the input format/device */
  80         input_format_ctx = NULL;
  81         ret = avformat_open_input(&input_format_ctx,
  82                                   input_path,
  83                                   input_format,
  84                                   input_options);
  85         if (ret < 0) {
  86                 fprintf(stderr, "cannot open input format/device\n");
  87                 goto out;
  88         }
  89
  90         /* get information on the input stream (e.g. format, bitrate, framerate) */
  91         ret = avformat_find_stream_info(input_format_ctx, NULL);
  92         if (ret < 0) {
  93                 fprintf(stderr, "cannot get information on the stream\n");
  94                 goto cleanup;
  95         }
  96
  97         /* dump what was found */
  98         av_dump_format(input_format_ctx, 0, input_path, 0);
  99
 100         /* look for the first video_stream */
 101         video_index = -1;
 102         for (i = 0; i < input_format_ctx->nb_streams; i++)
 103                 if (input_format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
 104                         video_index = i;
 105                         break;
 106                 }
 107         if (video_index == -1) {
 108                 fprintf(stderr, "cannot find any video streams\n");
 109                 ret = -ENOTSUP;
 110                 goto cleanup;
 111         }
 112
 113         /* get a pointer to the codec context for the video stream */
 114         input_codec_ctx = input_format_ctx->streams[video_index]->codec;
 115         if (input_codec_ctx == NULL) {
 116                 fprintf(stderr, "input codec context is not valid\n");
 117                 ret = -ENOTSUP;
 118                 goto cleanup;
 119         }
 120
 121         /* find the decoder for the video stream */
 122         input_codec = avcodec_find_decoder(input_codec_ctx->codec_id);
 123         if (input_codec == NULL) {
 124                 fprintf(stderr, "input_codec is NULL!\n");
 125                 ret = -ENOTSUP;
 126                 goto cleanup;
 127         }
 128
 129         /* open the decoder */
 130         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
 131         if (ret < 0) {
 132                 fprintf(stderr, "cannot open input codec\n");
 133                 ret = -ENOTSUP;
 134                 goto cleanup;
 135         }
 136
 137         input_ctx->format_ctx = input_format_ctx;
 138         input_ctx->codec_ctx = input_codec_ctx;
 139         input_ctx->video_stream_index = video_index;
 140
 141         ret = 0;
 142         goto out;
 143
 144 cleanup:
 145         avformat_close_input(&input_format_ctx);
 146 out:
 147         av_dict_free(input_options);
 148         *input_options = NULL;
 149         return ret;
 150 }
 151
 152
 153 struct video_output_ctx {
 154         AVCodecContext  *codec_ctx;
 155         int raw_output;
 156 };
 157
 158 static int video_output_init(struct video_output_ctx *output_ctx,
 159                              struct video_input_ctx *input_ctx,
 160                              unsigned int upscale,
 161                              unsigned int quality,
 162                              am7xxx_image_format image_format,
 163                              am7xxx_device *dev)
 164 {
 165         AVCodecContext *output_codec_ctx;
 166         AVCodec *output_codec;
 167         unsigned int new_output_width;
 168         unsigned int new_output_height;
 169         int ret;
 170
 171         if (input_ctx == NULL) {
 172                 fprintf(stderr, "input_ctx must not be NULL!\n");
 173                 ret = -EINVAL;
 174                 goto out;
 175         }
 176
 177         /* create the encoder context */
 178         output_codec_ctx = avcodec_alloc_context3(NULL);
 179         if (output_codec_ctx == NULL) {
 180                 fprintf(stderr, "cannot allocate output codec context!\n");
 181                 ret = -ENOMEM;
 182                 goto out;
 183         }
 184
 185         /* Calculate the new output dimension so the original picture is shown
 186          * in its entirety */
 187         ret = am7xxx_calc_scaled_image_dimensions(dev,
 188                                                   upscale,
 189                                                   (input_ctx->codec_ctx)->width,
 190                                                   (input_ctx->codec_ctx)->height,
 191                                                   &new_output_width,
 192                                                   &new_output_height);
 193         if (ret < 0) {
 194                 fprintf(stderr, "cannot calculate output dimension\n");
 195                 goto cleanup;
 196         }
 197
 198         /* put sample parameters */
 199         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
 200         output_codec_ctx->width      = new_output_width;
 201         output_codec_ctx->height     = new_output_height;
 202         output_codec_ctx->time_base.num  =
 203                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
 204         output_codec_ctx->time_base.den  =
 205                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
 206
 207         /* When the raw format is requested we don't actually need to setup
 208          * and open a decoder
 209          */
 210         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
 211                 fprintf(stdout, "using raw output format\n");
 212                 output_codec_ctx->pix_fmt    = PIX_FMT_NV12;
 213                 output_ctx->codec_ctx = output_codec_ctx;
 214                 output_ctx->raw_output = 1;
 215                 ret = 0;
 216                 goto out;
 217         }
 218
 219         output_codec_ctx->pix_fmt    = PIX_FMT_YUVJ420P;
 220         output_codec_ctx->codec_id   = CODEC_ID_MJPEG;
 221         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
 222
 223         /* Set quality and other VBR settings */
 224
 225         /* @note: 'quality' is expected to be between 1 and 100, but a value
 226          * between 0 to 99 has to be passed when calculating qmin and qmax.
 227          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
 228          * in particular they won't be 0, this is needed because they are used
 229          * as divisor somewhere in the encoding process */
 230         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
 231         output_codec_ctx->mb_lmin    = output_codec_ctx->lmin = output_codec_ctx->qmin * FF_QP2LAMBDA;
 232         output_codec_ctx->mb_lmax    = output_codec_ctx->lmax = output_codec_ctx->qmax * FF_QP2LAMBDA;
 233         output_codec_ctx->flags      |= CODEC_FLAG_QSCALE;
 234         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
 235
 236         /* find the encoder */
 237         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
 238         if (output_codec == NULL) {
 239                 fprintf(stderr, "cannot find output codec!\n");
 240                 ret = -ENOTSUP;
 241                 goto cleanup;
 242         }
 243
 244         /* open the codec */
 245         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
 246         if (ret < 0) {
 247                 fprintf(stderr, "could not open output codec!\n");
 248                 goto cleanup;
 249         }
 250
 251         output_ctx->codec_ctx = output_codec_ctx;
 252         output_ctx->raw_output = 0;
 253
 254         ret = 0;
 255         goto out;
 256
 257 cleanup:
 258         avcodec_close(output_codec_ctx);
 259         av_free(output_codec_ctx);
 260 out:
 261         return ret;
 262 }
 263
 264
 265 static int am7xxx_play(const char *input_format_string,
 266                        AVDictionary **input_options,
 267                        const char *input_path,
 268                        unsigned int rescale_method,
 269                        unsigned int upscale,
 270                        unsigned int quality,
 271                        am7xxx_image_format image_format,
 272                        am7xxx_device *dev)
 273 {
 274         struct video_input_ctx input_ctx;
 275         struct video_output_ctx output_ctx;
 276         AVFrame *picture_raw;
 277         AVFrame *picture_scaled;
 278         int out_buf_size;
 279         uint8_t *out_buf;
 280         int out_picture_size;
 281         struct SwsContext *sw_scale_ctx;
 282         AVPacket packet;
 283         int got_picture;
 284         int ret = 0;
 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 = avcodec_alloc_frame();
 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 = avcodec_alloc_frame();
 308         if (picture_scaled == NULL) {
 309                 fprintf(stderr, "cannot allocate the scaled picture!\n");
 310                 ret = -ENOMEM;
 311                 goto cleanup_picture_raw;
 312         }
 313
 314         /* calculate the bytes needed for the output image and create buffer for the output image */
 315         out_buf_size = avpicture_get_size((output_ctx.codec_ctx)->pix_fmt,
 316                                           (output_ctx.codec_ctx)->width,
 317                                           (output_ctx.codec_ctx)->height);
 318         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
 319         if (out_buf == NULL) {
 320                 fprintf(stderr, "cannot allocate output data buffer!\n");
 321                 ret = -ENOMEM;
 322                 goto cleanup_picture_scaled;
 323         }
 324
 325         /* assign appropriate parts of buffer to image planes in picture_scaled */
 326         avpicture_fill((AVPicture *)picture_scaled,
 327                        out_buf,
 328                        (output_ctx.codec_ctx)->pix_fmt,
 329                        (output_ctx.codec_ctx)->width,
 330                        (output_ctx.codec_ctx)->height);
 331
 332         sw_scale_ctx = sws_getCachedContext(NULL,
 333                                             (input_ctx.codec_ctx)->width,
 334                                             (input_ctx.codec_ctx)->height,
 335                                             (input_ctx.codec_ctx)->pix_fmt,
 336                                             (output_ctx.codec_ctx)->width,
 337                                             (output_ctx.codec_ctx)->height,
 338                                             (output_ctx.codec_ctx)->pix_fmt,
 339                                             rescale_method,
 340                                             NULL, NULL, NULL);
 341         if (sw_scale_ctx == NULL) {
 342                 fprintf(stderr, "cannot set up the rescaling context!\n");
 343                 ret = -EINVAL;
 344                 goto cleanup_out_buf;
 345         }
 346
 347         while (run) {
 348                 /* read packet */
 349                 ret = av_read_frame(input_ctx.format_ctx, &packet);
 350                 if (ret < 0) {
 351                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 352                                 ret = 0;
 353                         else
 354                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 355                         run = 0;
 356                         goto end_while;
 357                 }
 358
 359                 if (packet.stream_index != input_ctx.video_stream_index) {
 360                         /* that is more or less a "continue", but there is
 361                          * still the packet to free */
 362                         goto end_while;
 363                 }
 364
 365                 /* decode */
 366                 got_picture = 0;
 367                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &packet);
 368                 if (ret < 0) {
 369                         fprintf(stderr, "cannot decode video\n");
 370                         run = 0;
 371                         goto end_while;
 372                 }
 373
 374                 /* if we get the complete frame */
 375                 if (got_picture) {
 376                         /* convert it to YUV */
 377                         sws_scale(sw_scale_ctx,
 378                                   (const uint8_t * const*)picture_raw->data,
 379                                   picture_raw->linesize,
 380                                   0,
 381                                   (input_ctx.codec_ctx)->height,
 382                                   picture_scaled->data,
 383                                   picture_scaled->linesize);
 384
 385                         if (output_ctx.raw_output) {
 386                                 out_picture_size = out_buf_size;
 387                         } else {
 388                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 389                                 /* TODO: switch to avcodec_encode_video2() eventually */
 390                                 out_picture_size = avcodec_encode_video(output_ctx.codec_ctx,
 391                                                                         out_buf,
 392                                                                         out_buf_size,
 393                                                                         picture_scaled);
 394                                 if (out_picture_size < 0) {
 395                                         fprintf(stderr, "cannot encode video\n");
 396                                         ret = out_picture_size;
 397                                         run = 0;
 398                                         goto end_while;
 399                                 }
 400                         }
 401
 402 #ifdef DEBUG
 403                         char filename[NAME_MAX];
 404                         FILE *file;
 405                         if (!output_ctx.raw_output)
 406                                 snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 407                         else
 408                                 snprintf(filename, NAME_MAX, "out.raw");
 409                         file = fopen(filename, "wb");
 410                         fwrite(out_buf, 1, out_picture_size, file);
 411                         fclose(file);
 412 #endif
 413
 414                         ret = am7xxx_send_image(dev,
 415                                                 image_format,
 416                                                 (output_ctx.codec_ctx)->width,
 417                                                 (output_ctx.codec_ctx)->height,
 418                                                 out_buf,
 419                                                 out_picture_size);
 420                         if (ret < 0) {
 421                                 perror("am7xxx_send_image");
 422                                 run = 0;
 423                                 goto end_while;
 424                         }
 425                 }
 426 end_while:
 427                 av_free_packet(&packet);
 428         }
 429
 430         sws_freeContext(sw_scale_ctx);
 431 cleanup_out_buf:
 432         av_free(out_buf);
 433 cleanup_picture_scaled:
 434         av_free(picture_scaled);
 435 cleanup_picture_raw:
 436         av_free(picture_raw);
 437
 438 cleanup_output:
 439         /* av_free is needed as well,
 440          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
 441          */
 442         avcodec_close(output_ctx.codec_ctx);
 443         av_free(output_ctx.codec_ctx);
 444
 445 cleanup_input:
 446         avcodec_close(input_ctx.codec_ctx);
 447         avformat_close_input(&(input_ctx.format_ctx));
 448
 449 out:
 450         return ret;
 451 }
 452
 453 #ifdef HAVE_XCB
 454 #include <xcb/xcb.h>
 455 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 456 {
 457         int i, screen_number;
 458         xcb_connection_t *connection;
 459         const xcb_setup_t *setup;
 460         xcb_screen_iterator_t iter;
 461
 462         connection = xcb_connect(displayname, &screen_number);
 463         if (xcb_connection_has_error(connection)) {
 464                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 465                 return -EINVAL;
 466         }
 467
 468         setup = xcb_get_setup(connection);
 469         if (setup == NULL) {
 470                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 471                 xcb_disconnect(connection);
 472                 return -EINVAL;
 473         }
 474
 475         iter = xcb_setup_roots_iterator(setup);
 476         for (i = 0; i < screen_number; ++i) {
 477                 xcb_screen_next(&iter);
 478         }
 479
 480         xcb_screen_t *screen = iter.data;
 481
 482         *width = screen->width_in_pixels;
 483         *height = screen->height_in_pixels;
 484
 485         xcb_disconnect(connection);
 486
 487         return 0;
 488 }
 489
 490 static char *get_x_screen_size(const char *input_path)
 491 {
 492         int len;
 493         int width;
 494         int height;
 495         char *screen_size;
 496         int ret;
 497
 498         ret = x_get_screen_dimensions(input_path, &width, &height);
 499         if (ret < 0) {
 500                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 501                 return NULL;
 502         }
 503
 504         len = snprintf(NULL, 0, "%dx%d", width, height);
 505
 506         screen_size = malloc((len + 1) * sizeof(char));
 507         if (screen_size == NULL) {
 508                 perror("malloc");
 509                 return NULL;
 510         }
 511
 512         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 513         if (len < 0) {
 514                 free(screen_size);
 515                 screen_size = NULL;
 516                 return NULL;
 517         }
 518         return screen_size;
 519 }
 520 #else
 521 static char *get_x_screen_size(const char *input_path)
 522 {
 523         (void) input_path;
 524         fprintf(stderr, "%s: fallback implementation\n", __func__);
 525         return strdup("vga");
 526 }
 527 #endif
 528
 529 static void unset_run(int signo)
 530 {
 531         (void) signo;
 532         run = 0;
 533 }
 534
 535 static int set_signal_handler(void (*signal_handler)(int))
 536 {
 537         struct sigaction new_action;
 538         struct sigaction old_action;
 539         int ret = 0;
 540
 541         new_action.sa_handler = signal_handler;
 542         sigemptyset(&new_action.sa_mask);
 543         new_action.sa_flags = 0;
 544
 545         ret = sigaction(SIGINT, NULL, &old_action);
 546         if (ret < 0) {
 547                 perror("sigaction on old_action");
 548                 goto out;
 549         }
 550
 551         if (old_action.sa_handler != SIG_IGN) {
 552                 ret = sigaction(SIGINT, &new_action, NULL);
 553                 if (ret < 0) {
 554                         perror("sigaction on new_action");
 555                         goto out;
 556                 }
 557         }
 558
 559 out:
 560         return ret;
 561 }
 562
 563 static void usage(char *name)
 564 {
 565         printf("usage: %s [OPTIONS]\n\n", name);
 566         printf("OPTIONS:\n");
 567         printf("\t-f <input format>\tthe input device format\n");
 568         printf("\t-i <input path>\t\tthe input path\n");
 569         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 570         printf("\t\t\t\tEXAMPLE:\n");
 571         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 572         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 573         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 574         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 575         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 576         printf("\t\t\t\t\t1 - JPEG\n");
 577         printf("\t\t\t\t\t2 - NV12\n");
 578         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 579         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 580         printf("\t-p <power level>\tpower level of device, between %x (off) and %x (maximum)\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 581         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n\t\t\t\t\t the slave connector to be plugged in.\n");
 582         printf("\t-h \t\t\tthis help message\n");
 583         printf("\n\nEXAMPLES OF USE:\n");
 584         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 585         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 586         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 587         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 588 }
 589
 590 int main(int argc, char *argv[])
 591 {
 592         int ret;
 593         int opt;
 594         char *subopts;
 595         char *subopts_saved;
 596         char *subopt;
 597         char *input_format_string = NULL;
 598         AVDictionary *options = NULL;
 599         char *input_path = NULL;
 600         unsigned int rescale_method = SWS_BICUBIC;
 601         unsigned int upscale = 0;
 602         unsigned int quality = 95;
 603         int log_level = AM7XXX_LOG_INFO;
 604         am7xxx_power_mode power_mode = AM7XXX_POWER_LOW;
 605         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 606         am7xxx_context *ctx;
 607         am7xxx_device *dev;
 608
 609         while ((opt = getopt(argc, argv, "f:i:o:s:uF:q:l:p:h")) != -1) {
 610                 switch (opt) {
 611                 case 'f':
 612                         input_format_string = strdup(optarg);
 613                         break;
 614                 case 'i':
 615                         input_path = strdup(optarg);
 616                         break;
 617                 case 'o':
 618                         /*
 619                          * parse suboptions, the expected format is something
 620                          * like:
 621                          *   draw_mouse=1,framerate=100,video_size=800x480
 622                          */
 623                         subopts = subopts_saved = strdup(optarg);
 624                         while((subopt = strtok_r(subopts, ",", &subopts))) {
 625                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 626                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 627                                 if (subopt_value == NULL) {
 628                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 629                                         continue;
 630                                 }
 631                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 632                         }
 633                         free(subopts_saved);
 634                         break;
 635                 case 's':
 636                         rescale_method = atoi(optarg);
 637                         switch(rescale_method) {
 638                         case SWS_FAST_BILINEAR:
 639                         case SWS_BILINEAR:
 640                         case SWS_BICUBIC:
 641                         case SWS_X:
 642                         case SWS_POINT:
 643                         case SWS_AREA:
 644                         case SWS_BICUBLIN:
 645                         case SWS_GAUSS:
 646                         case SWS_SINC:
 647                         case SWS_LANCZOS:
 648                         case SWS_SPLINE:
 649                                 break;
 650                         default:
 651                                 fprintf(stderr, "Unsupported rescale method\n");
 652                                 ret = -EINVAL;
 653                                 goto out;
 654                         }
 655                         break;
 656                 case 'u':
 657                         upscale = 1;
 658                         break;
 659                 case 'F':
 660                         format = atoi(optarg);
 661                         switch(format) {
 662                         case AM7XXX_IMAGE_FORMAT_JPEG:
 663                                 fprintf(stdout, "JPEG format\n");
 664                                 break;
 665                         case AM7XXX_IMAGE_FORMAT_NV12:
 666                                 fprintf(stdout, "NV12 format\n");
 667                                 break;
 668                         default:
 669                                 fprintf(stderr, "Unsupported format\n");
 670                                 ret = -EINVAL;
 671                                 goto out;
 672                         }
 673                         break;
 674                 case 'q':
 675                         quality = atoi(optarg);
 676                         if (quality < 1 || quality > 100) {
 677                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 678                                 ret = -EINVAL;
 679                                 goto out;
 680                         }
 681                         break;
 682                 case 'l':
 683                         log_level = atoi(optarg);
 684                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 685                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 686                                 log_level = AM7XXX_LOG_ERROR;
 687                         }
 688                         break;
 689                 case 'p':
 690                         power_mode = atoi(optarg);
 691                         switch(power_mode) {
 692                         case AM7XXX_POWER_OFF:
 693                         case AM7XXX_POWER_LOW:
 694                         case AM7XXX_POWER_MIDDLE:
 695                         case AM7XXX_POWER_HIGH:
 696                         case AM7XXX_POWER_TURBO:
 697                                 fprintf(stdout, "Power mode: %x\n", power_mode);
 698                                 break;
 699                         default:
 700                                 fprintf(stderr, "Invalid power mode value, must be between %x and %x\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 701                                 ret = -EINVAL;
 702                                 goto out;
 703                         }
 704                         break;
 705                 case 'h':
 706                         usage(argv[0]);
 707                         ret = 0;
 708                         goto out;
 709                         break;
 710                 default: /* '?' */
 711                         usage(argv[0]);
 712                         ret = -EINVAL;
 713                         goto out;
 714                 }
 715         }
 716
 717         if (input_path == NULL) {
 718                 fprintf(stderr, "The -i option must always be passed\n");
 719                 ret = -EINVAL;
 720                 goto out;
 721         }
 722
 723         /*
 724          * When the input format is 'x11grab' set some useful fallback options
 725          * if not supplied by the user, in particular grab full screen
 726          */
 727         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 728                 char *video_size;
 729
 730                 video_size = get_x_screen_size(input_path);
 731
 732                 if (!av_dict_get(options, "video_size", NULL, 0))
 733                         av_dict_set(&options, "video_size", video_size, 0);
 734
 735                 if (!av_dict_get(options, "framerate", NULL, 0))
 736                         av_dict_set(&options, "framerate", "60", 0);
 737
 738                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 739                         av_dict_set(&options, "draw_mouse",  "1", 0);
 740
 741                 free(video_size);
 742         }
 743
 744         ret = set_signal_handler(unset_run);
 745         if (ret < 0) {
 746                 perror("sigaction");
 747                 goto out;
 748         }
 749
 750         ret = am7xxx_init(&ctx);
 751         if (ret < 0) {
 752                 perror("am7xxx_init");
 753                 goto out;
 754         }
 755
 756         am7xxx_set_log_level(ctx, log_level);
 757
 758         ret = am7xxx_open_device(ctx, &dev, 0);
 759         if (ret < 0) {
 760                 perror("am7xxx_open_device");
 761                 goto cleanup;
 762         }
 763
 764         ret = am7xxx_set_power_mode(dev, power_mode);
 765         if (ret < 0) {
 766                 perror("am7xxx_set_power_mode");
 767                 goto cleanup;
 768         }
 769
 770         ret = am7xxx_play(input_format_string,
 771                           &options,
 772                           input_path,
 773                           rescale_method,
 774                           upscale,
 775                           quality,
 776                           format,
 777                           dev);
 778         if (ret < 0) {
 779                 fprintf(stderr, "am7xxx_play failed\n");
 780                 goto cleanup;
 781         }
 782
 783 cleanup:
 784         am7xxx_shutdown(ctx);
 785 out:
 786         av_dict_free(&options);
 787         free(input_path);
 788         free(input_format_string);
 789         return ret;
 790 }