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 /* On some systems ENOTSUP is not defined, fallback to its value on
  40  * linux which is equal to EOPNOTSUPP which is 95
  41  */
  42 #ifndef ENOTSUP
  43 #define ENOTSUP 95
  44 #endif
  45
  46 static unsigned int run = 1;
  47
  48 struct video_input_ctx {
  49         AVFormatContext *format_ctx;
  50         AVCodecContext  *codec_ctx;
  51         int video_stream_index;
  52 };
  53
  54 static int video_input_init(struct video_input_ctx *input_ctx,
  55                             const char *input_format_string,
  56                             const char *input_path,
  57                             AVDictionary **input_options)
  58 {
  59         AVInputFormat *input_format = NULL;
  60         AVFormatContext *input_format_ctx;
  61         AVCodecContext *input_codec_ctx;
  62         AVCodec *input_codec;
  63         int video_index;
  64         unsigned int i;
  65         int ret;
  66
  67         avdevice_register_all();
  68         avcodec_register_all();
  69         av_register_all();
  70
  71         if (input_format_string) {
  72                 /* find the desired input format */
  73                 input_format = av_find_input_format(input_format_string);
  74                 if (input_format == NULL) {
  75                         fprintf(stderr, "cannot find input format\n");
  76                         ret = -ENODEV;
  77                         goto out;
  78                 }
  79         }
  80
  81         if (input_path == NULL) {
  82                 fprintf(stderr, "input_path must not be NULL!\n");
  83                 ret = -EINVAL;
  84                 goto out;
  85         }
  86
  87         /* open the input format/device */
  88         input_format_ctx = NULL;
  89         ret = avformat_open_input(&input_format_ctx,
  90                                   input_path,
  91                                   input_format,
  92                                   input_options);
  93         if (ret < 0) {
  94                 fprintf(stderr, "cannot open input format/device\n");
  95                 goto out;
  96         }
  97
  98         /* get information on the input stream (e.g. format, bitrate, framerate) */
  99         ret = avformat_find_stream_info(input_format_ctx, NULL);
 100         if (ret < 0) {
 101                 fprintf(stderr, "cannot get information on the stream\n");
 102                 goto cleanup;
 103         }
 104
 105         /* dump what was found */
 106         av_dump_format(input_format_ctx, 0, input_path, 0);
 107
 108         /* look for the first video_stream */
 109         video_index = -1;
 110         for (i = 0; i < input_format_ctx->nb_streams; i++)
 111                 if (input_format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
 112                         video_index = i;
 113                         break;
 114                 }
 115         if (video_index == -1) {
 116                 fprintf(stderr, "cannot find any video streams\n");
 117                 ret = -ENOTSUP;
 118                 goto cleanup;
 119         }
 120
 121         /* get a pointer to the codec context for the video stream */
 122         input_codec_ctx = input_format_ctx->streams[video_index]->codec;
 123         if (input_codec_ctx == NULL) {
 124                 fprintf(stderr, "input codec context is not valid\n");
 125                 ret = -ENOTSUP;
 126                 goto cleanup;
 127         }
 128
 129         /* find the decoder for the video stream */
 130         input_codec = avcodec_find_decoder(input_codec_ctx->codec_id);
 131         if (input_codec == NULL) {
 132                 fprintf(stderr, "input_codec is NULL!\n");
 133                 ret = -ENOTSUP;
 134                 goto cleanup;
 135         }
 136
 137         /* open the decoder */
 138         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
 139         if (ret < 0) {
 140                 fprintf(stderr, "cannot open input codec\n");
 141                 ret = -ENOTSUP;
 142                 goto cleanup;
 143         }
 144
 145         input_ctx->format_ctx = input_format_ctx;
 146         input_ctx->codec_ctx = input_codec_ctx;
 147         input_ctx->video_stream_index = video_index;
 148
 149         ret = 0;
 150         goto out;
 151
 152 cleanup:
 153         avformat_close_input(&input_format_ctx);
 154 out:
 155         av_dict_free(input_options);
 156         *input_options = NULL;
 157         return ret;
 158 }
 159
 160
 161 struct video_output_ctx {
 162         AVCodecContext  *codec_ctx;
 163         int raw_output;
 164 };
 165
 166 static int video_output_init(struct video_output_ctx *output_ctx,
 167                              struct video_input_ctx *input_ctx,
 168                              unsigned int upscale,
 169                              unsigned int quality,
 170                              am7xxx_image_format image_format,
 171                              am7xxx_device *dev)
 172 {
 173         AVCodecContext *output_codec_ctx;
 174         AVCodec *output_codec;
 175         unsigned int new_output_width;
 176         unsigned int new_output_height;
 177         int ret;
 178
 179         if (input_ctx == NULL) {
 180                 fprintf(stderr, "input_ctx must not be NULL!\n");
 181                 ret = -EINVAL;
 182                 goto out;
 183         }
 184
 185         /* create the encoder context */
 186         output_codec_ctx = avcodec_alloc_context3(NULL);
 187         if (output_codec_ctx == NULL) {
 188                 fprintf(stderr, "cannot allocate output codec context!\n");
 189                 ret = -ENOMEM;
 190                 goto out;
 191         }
 192
 193         /* Calculate the new output dimension so the original picture is shown
 194          * in its entirety */
 195         ret = am7xxx_calc_scaled_image_dimensions(dev,
 196                                                   upscale,
 197                                                   (input_ctx->codec_ctx)->width,
 198                                                   (input_ctx->codec_ctx)->height,
 199                                                   &new_output_width,
 200                                                   &new_output_height);
 201         if (ret < 0) {
 202                 fprintf(stderr, "cannot calculate output dimension\n");
 203                 goto cleanup;
 204         }
 205
 206         /* put sample parameters */
 207         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
 208         output_codec_ctx->width      = new_output_width;
 209         output_codec_ctx->height     = new_output_height;
 210         output_codec_ctx->time_base.num  =
 211                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
 212         output_codec_ctx->time_base.den  =
 213                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
 214
 215         /* When the raw format is requested we don't actually need to setup
 216          * and open a decoder
 217          */
 218         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
 219                 fprintf(stdout, "using raw output format\n");
 220                 output_codec_ctx->pix_fmt    = AV_PIX_FMT_NV12;
 221                 output_ctx->codec_ctx = output_codec_ctx;
 222                 output_ctx->raw_output = 1;
 223                 ret = 0;
 224                 goto out;
 225         }
 226
 227         output_codec_ctx->pix_fmt    = AV_PIX_FMT_YUVJ420P;
 228         output_codec_ctx->codec_id   = AV_CODEC_ID_MJPEG;
 229         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
 230
 231         /* Set quality and other VBR settings */
 232
 233         /* @note: 'quality' is expected to be between 1 and 100, but a value
 234          * between 0 to 99 has to be passed when calculating qmin and qmax.
 235          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
 236          * in particular they won't be 0, this is needed because they are used
 237          * as divisor somewhere in the encoding process */
 238         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
 239         output_codec_ctx->mb_lmin    = output_codec_ctx->qmin * FF_QP2LAMBDA;
 240         output_codec_ctx->mb_lmax    = output_codec_ctx->qmax * FF_QP2LAMBDA;
 241         output_codec_ctx->flags      |= AV_CODEC_FLAG_QSCALE;
 242         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
 243
 244         /* find the encoder */
 245         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
 246         if (output_codec == NULL) {
 247                 fprintf(stderr, "cannot find output codec!\n");
 248                 ret = -ENOTSUP;
 249                 goto cleanup;
 250         }
 251
 252         /* open the codec */
 253         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
 254         if (ret < 0) {
 255                 fprintf(stderr, "could not open output codec!\n");
 256                 goto cleanup;
 257         }
 258
 259         output_ctx->codec_ctx = output_codec_ctx;
 260         output_ctx->raw_output = 0;
 261
 262         ret = 0;
 263         goto out;
 264
 265 cleanup:
 266         avcodec_close(output_codec_ctx);
 267         av_free(output_codec_ctx);
 268 out:
 269         return ret;
 270 }
 271
 272
 273 static int am7xxx_play(const char *input_format_string,
 274                        AVDictionary **input_options,
 275                        const char *input_path,
 276                        unsigned int rescale_method,
 277                        unsigned int upscale,
 278                        unsigned int quality,
 279                        am7xxx_image_format image_format,
 280                        am7xxx_device *dev,
 281                        int dump_frame)
 282 {
 283         struct video_input_ctx input_ctx;
 284         struct video_output_ctx output_ctx;
 285         AVFrame *picture_raw;
 286         AVFrame *picture_scaled;
 287         int out_buf_size;
 288         uint8_t *out_buf;
 289         int out_picture_size;
 290         uint8_t *out_picture;
 291         struct SwsContext *sw_scale_ctx;
 292         AVPacket in_packet;
 293         AVPacket out_packet;
 294         int got_picture;
 295         int got_packet;
 296         int ret;
 297
 298         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
 299         if (ret < 0) {
 300                 fprintf(stderr, "cannot initialize input\n");
 301                 goto out;
 302         }
 303
 304         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
 305         if (ret < 0) {
 306                 fprintf(stderr, "cannot initialize input\n");
 307                 goto cleanup_input;
 308         }
 309
 310         /* allocate an input frame */
 311         picture_raw = av_frame_alloc();
 312         if (picture_raw == NULL) {
 313                 fprintf(stderr, "cannot allocate the raw picture frame!\n");
 314                 ret = -ENOMEM;
 315                 goto cleanup_output;
 316         }
 317
 318         /* allocate output frame */
 319         picture_scaled = av_frame_alloc();
 320         if (picture_scaled == NULL) {
 321                 fprintf(stderr, "cannot allocate the scaled picture!\n");
 322                 ret = -ENOMEM;
 323                 goto cleanup_picture_raw;
 324         }
 325         picture_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
 326         picture_scaled->width = (output_ctx.codec_ctx)->width;
 327         picture_scaled->height = (output_ctx.codec_ctx)->height;
 328
 329         /* calculate the bytes needed for the output image and create buffer for the output image */
 330         out_buf_size = av_image_get_buffer_size((output_ctx.codec_ctx)->pix_fmt,
 331                                                 (output_ctx.codec_ctx)->width,
 332                                                 (output_ctx.codec_ctx)->height,
 333                                                 1);
 334         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
 335         if (out_buf == NULL) {
 336                 fprintf(stderr, "cannot allocate output data buffer!\n");
 337                 ret = -ENOMEM;
 338                 goto cleanup_picture_scaled;
 339         }
 340
 341         /* assign appropriate parts of buffer to image planes in picture_scaled */
 342         av_image_fill_arrays(picture_scaled->data,
 343                              picture_scaled->linesize,
 344                              out_buf,
 345                              (output_ctx.codec_ctx)->pix_fmt,
 346                              (output_ctx.codec_ctx)->width,
 347                              (output_ctx.codec_ctx)->height,
 348                              1);
 349
 350         sw_scale_ctx = sws_getCachedContext(NULL,
 351                                             (input_ctx.codec_ctx)->width,
 352                                             (input_ctx.codec_ctx)->height,
 353                                             (input_ctx.codec_ctx)->pix_fmt,
 354                                             (output_ctx.codec_ctx)->width,
 355                                             (output_ctx.codec_ctx)->height,
 356                                             (output_ctx.codec_ctx)->pix_fmt,
 357                                             rescale_method,
 358                                             NULL, NULL, NULL);
 359         if (sw_scale_ctx == NULL) {
 360                 fprintf(stderr, "cannot set up the rescaling context!\n");
 361                 ret = -EINVAL;
 362                 goto cleanup_out_buf;
 363         }
 364
 365         got_packet = 0;
 366         while (run) {
 367                 /* read packet */
 368                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
 369                 if (ret < 0) {
 370                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 371                                 ret = 0;
 372                         else
 373                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 374                         run = 0;
 375                         goto end_while;
 376                 }
 377
 378                 if (in_packet.stream_index != input_ctx.video_stream_index) {
 379                         /* that is more or less a "continue", but there is
 380                          * still the packet to free */
 381                         goto end_while;
 382                 }
 383
 384                 /* decode */
 385                 got_picture = 0;
 386                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
 387                 if (ret < 0) {
 388                         fprintf(stderr, "cannot decode video\n");
 389                         run = 0;
 390                         goto end_while;
 391                 }
 392
 393                 /* if we got the complete frame */
 394                 if (got_picture) {
 395                         /*
 396                          * Rescaling the picture also changes its pixel format
 397                          * to the raw format supported by the projector if
 398                          * this was set in video_output_init()
 399                          */
 400                         sws_scale(sw_scale_ctx,
 401                                   (const uint8_t * const *)picture_raw->data,
 402                                   picture_raw->linesize,
 403                                   0,
 404                                   (input_ctx.codec_ctx)->height,
 405                                   picture_scaled->data,
 406                                   picture_scaled->linesize);
 407
 408                         if (output_ctx.raw_output) {
 409                                 out_picture = out_buf;
 410                                 out_picture_size = out_buf_size;
 411                         } else {
 412                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 413                                 av_init_packet(&out_packet);
 414                                 out_packet.data = NULL;
 415                                 out_packet.size = 0;
 416                                 got_packet = 0;
 417                                 ret = avcodec_encode_video2(output_ctx.codec_ctx,
 418                                                             &out_packet,
 419                                                             picture_scaled,
 420                                                             &got_packet);
 421                                 if (ret < 0 || !got_packet) {
 422                                         fprintf(stderr, "cannot encode video\n");
 423                                         run = 0;
 424                                         goto end_while;
 425                                 }
 426
 427                                 out_picture = out_packet.data;
 428                                 out_picture_size = out_packet.size;
 429                         }
 430
 431 #ifdef DEBUG
 432                         if (dump_frame) {
 433                                 char filename[NAME_MAX];
 434                                 FILE *file;
 435                                 if (!output_ctx.raw_output)
 436                                         snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 437                                 else
 438                                         snprintf(filename, NAME_MAX, "out.raw");
 439                                 file = fopen(filename, "wb");
 440                                 fwrite(out_picture, 1, out_picture_size, file);
 441                                 fclose(file);
 442                         }
 443 #else
 444                         (void) dump_frame;
 445 #endif
 446
 447                         ret = am7xxx_send_image_async(dev,
 448                                                       image_format,
 449                                                       (output_ctx.codec_ctx)->width,
 450                                                       (output_ctx.codec_ctx)->height,
 451                                                       out_picture,
 452                                                       out_picture_size);
 453                         if (ret < 0) {
 454                                 perror("am7xxx_send_image_async");
 455                                 run = 0;
 456                                 goto end_while;
 457                         }
 458                 }
 459 end_while:
 460                 if (!output_ctx.raw_output && got_packet)
 461                         av_packet_unref(&out_packet);
 462                 av_packet_unref(&in_packet);
 463         }
 464
 465         sws_freeContext(sw_scale_ctx);
 466 cleanup_out_buf:
 467         av_free(out_buf);
 468 cleanup_picture_scaled:
 469         av_frame_free(&picture_scaled);
 470 cleanup_picture_raw:
 471         av_frame_free(&picture_raw);
 472
 473 cleanup_output:
 474         /* av_free is needed as well,
 475          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
 476          */
 477         avcodec_close(output_ctx.codec_ctx);
 478         av_free(output_ctx.codec_ctx);
 479
 480 cleanup_input:
 481         avcodec_close(input_ctx.codec_ctx);
 482         avformat_close_input(&(input_ctx.format_ctx));
 483
 484 out:
 485         return ret;
 486 }
 487
 488 #ifdef HAVE_XCB
 489 #include <xcb/xcb.h>
 490 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 491 {
 492         int i, screen_number;
 493         xcb_connection_t *connection;
 494         const xcb_setup_t *setup;
 495         xcb_screen_iterator_t iter;
 496
 497         connection = xcb_connect(displayname, &screen_number);
 498         if (xcb_connection_has_error(connection)) {
 499                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 500                 return -EINVAL;
 501         }
 502
 503         setup = xcb_get_setup(connection);
 504         if (setup == NULL) {
 505                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 506                 xcb_disconnect(connection);
 507                 return -EINVAL;
 508         }
 509
 510         iter = xcb_setup_roots_iterator(setup);
 511         for (i = 0; i < screen_number; ++i) {
 512                 xcb_screen_next(&iter);
 513         }
 514
 515         xcb_screen_t *screen = iter.data;
 516
 517         *width = screen->width_in_pixels;
 518         *height = screen->height_in_pixels;
 519
 520         xcb_disconnect(connection);
 521
 522         return 0;
 523 }
 524
 525 static char *get_x_screen_size(const char *input_path)
 526 {
 527         int len;
 528         int width;
 529         int height;
 530         char *screen_size;
 531         int ret;
 532
 533         ret = x_get_screen_dimensions(input_path, &width, &height);
 534         if (ret < 0) {
 535                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 536                 return NULL;
 537         }
 538
 539         len = snprintf(NULL, 0, "%dx%d", width, height);
 540
 541         screen_size = malloc((len + 1) * sizeof(char));
 542         if (screen_size == NULL) {
 543                 perror("malloc");
 544                 return NULL;
 545         }
 546
 547         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 548         if (len < 0) {
 549                 free(screen_size);
 550                 screen_size = NULL;
 551                 return NULL;
 552         }
 553         return screen_size;
 554 }
 555 #else
 556 static char *get_x_screen_size(const char *input_path)
 557 {
 558         (void) input_path;
 559         fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
 560         return strdup("vga");
 561 }
 562 #endif
 563
 564 static void unset_run(int signo)
 565 {
 566         (void) signo;
 567         run = 0;
 568 }
 569
 570 #ifdef HAVE_SIGACTION
 571 static int set_signal_handler(void (*signal_handler)(int))
 572 {
 573         struct sigaction new_action;
 574         struct sigaction old_action;
 575         int ret;
 576
 577         new_action.sa_handler = signal_handler;
 578         sigemptyset(&new_action.sa_mask);
 579         new_action.sa_flags = 0;
 580
 581         ret = sigaction(SIGINT, NULL, &old_action);
 582         if (ret < 0) {
 583                 perror("sigaction on old_action");
 584                 goto out;
 585         }
 586
 587         if (old_action.sa_handler != SIG_IGN) {
 588                 ret = sigaction(SIGINT, &new_action, NULL);
 589                 if (ret < 0) {
 590                         perror("sigaction on new_action");
 591                         goto out;
 592                 }
 593         }
 594
 595 out:
 596         return ret;
 597 }
 598 #else
 599 static int set_signal_handler(void (*signal_handler)(int))
 600 {
 601         (void)signal_handler;
 602         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
 603         return 0;
 604 }
 605 #endif
 606
 607
 608 static void usage(char *name)
 609 {
 610         printf("usage: %s [OPTIONS]\n\n", name);
 611         printf("OPTIONS:\n");
 612         printf("\t-d <index>\t\tthe device index (default is 0)\n");
 613 #ifdef DEBUG
 614         printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
 615 #endif
 616         printf("\t-f <input format>\tthe input device format\n");
 617         printf("\t-i <input path>\t\tthe input path\n");
 618         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 619         printf("\t\t\t\tEXAMPLE:\n");
 620         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 621         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 622         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 623         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 624         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 625         printf("\t\t\t\t\t1 - JPEG\n");
 626         printf("\t\t\t\t\t2 - NV12\n");
 627         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 628         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 629         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
 630                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 631         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
 632         printf("\t\t\t\t         the slave connector to be plugged in.\n");
 633         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
 634                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 635         printf("\t-h \t\t\tthis help message\n");
 636         printf("\n\nEXAMPLES OF USE:\n");
 637         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 638         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 639         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 640         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 641 }
 642
 643 int main(int argc, char *argv[])
 644 {
 645         int ret;
 646         int opt;
 647         char *subopts;
 648         char *subopts_saved;
 649         char *subopt;
 650         char *input_format_string = NULL;
 651         AVDictionary *options = NULL;
 652         char *input_path = NULL;
 653         unsigned int rescale_method = SWS_BICUBIC;
 654         unsigned int upscale = 0;
 655         unsigned int quality = 95;
 656         int log_level = AM7XXX_LOG_INFO;
 657         int device_index = 0;
 658         int power_mode = AM7XXX_POWER_LOW;
 659         int zoom = AM7XXX_ZOOM_ORIGINAL;
 660         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 661         am7xxx_context *ctx;
 662         am7xxx_device *dev;
 663         int dump_frame = 0;
 664
 665         while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
 666                 switch (opt) {
 667                 case 'd':
 668                         device_index = atoi(optarg);
 669                         if (device_index < 0) {
 670                                 fprintf(stderr, "Unsupported device index\n");
 671                                 ret = -EINVAL;
 672                                 goto out;
 673                         }
 674                         break;
 675                 case 'D':
 676                         dump_frame = 1;
 677 #ifndef DEBUG
 678                         fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
 679 #endif
 680                         break;
 681                 case 'f':
 682                         input_format_string = strdup(optarg);
 683                         break;
 684                 case 'i':
 685                         input_path = strdup(optarg);
 686                         break;
 687                 case 'o':
 688 #ifdef HAVE_STRTOK_R
 689                         /*
 690                          * parse suboptions, the expected format is something
 691                          * like:
 692                          *   draw_mouse=1,framerate=100,video_size=800x480
 693                          */
 694                         subopts = subopts_saved = strdup(optarg);
 695                         while ((subopt = strtok_r(subopts, ",", &subopts))) {
 696                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 697                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 698                                 if (subopt_value == NULL) {
 699                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 700                                         continue;
 701                                 }
 702                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 703                         }
 704                         free(subopts_saved);
 705 #else
 706                         fprintf(stderr, "Option '-o' not implemented\n");
 707 #endif
 708                         break;
 709                 case 's':
 710                         rescale_method = atoi(optarg);
 711                         switch(rescale_method) {
 712                         case SWS_FAST_BILINEAR:
 713                         case SWS_BILINEAR:
 714                         case SWS_BICUBIC:
 715                         case SWS_X:
 716                         case SWS_POINT:
 717                         case SWS_AREA:
 718                         case SWS_BICUBLIN:
 719                         case SWS_GAUSS:
 720                         case SWS_SINC:
 721                         case SWS_LANCZOS:
 722                         case SWS_SPLINE:
 723                                 break;
 724                         default:
 725                                 fprintf(stderr, "Unsupported rescale method\n");
 726                                 ret = -EINVAL;
 727                                 goto out;
 728                         }
 729                         break;
 730                 case 'u':
 731                         upscale = 1;
 732                         break;
 733                 case 'F':
 734                         format = atoi(optarg);
 735                         switch(format) {
 736                         case AM7XXX_IMAGE_FORMAT_JPEG:
 737                                 fprintf(stdout, "JPEG format\n");
 738                                 break;
 739                         case AM7XXX_IMAGE_FORMAT_NV12:
 740                                 fprintf(stdout, "NV12 format\n");
 741                                 break;
 742                         default:
 743                                 fprintf(stderr, "Unsupported format\n");
 744                                 ret = -EINVAL;
 745                                 goto out;
 746                         }
 747                         break;
 748                 case 'q':
 749                         quality = atoi(optarg);
 750                         if (quality < 1 || quality > 100) {
 751                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 752                                 ret = -EINVAL;
 753                                 goto out;
 754                         }
 755                         break;
 756                 case 'l':
 757                         log_level = atoi(optarg);
 758                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 759                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 760                                 log_level = AM7XXX_LOG_ERROR;
 761                         }
 762                         break;
 763                 case 'p':
 764                         power_mode = atoi(optarg);
 765                         switch(power_mode) {
 766                         case AM7XXX_POWER_OFF:
 767                         case AM7XXX_POWER_LOW:
 768                         case AM7XXX_POWER_MIDDLE:
 769                         case AM7XXX_POWER_HIGH:
 770                         case AM7XXX_POWER_TURBO:
 771                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 772                                 break;
 773                         default:
 774                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 775                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 776                                 ret = -EINVAL;
 777                                 goto out;
 778                         }
 779                         break;
 780                 case 'z':
 781                         zoom = atoi(optarg);
 782                         switch(zoom) {
 783                         case AM7XXX_ZOOM_ORIGINAL:
 784                         case AM7XXX_ZOOM_H:
 785                         case AM7XXX_ZOOM_H_V:
 786                         case AM7XXX_ZOOM_TEST:
 787                         case AM7XXX_ZOOM_TELE:
 788                                 fprintf(stdout, "Zoom: %d\n", zoom);
 789                                 break;
 790                         default:
 791                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 792                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 793                                 ret = -EINVAL;
 794                                 goto out;
 795                         }
 796                         break;
 797                 case 'h':
 798                         usage(argv[0]);
 799                         ret = 0;
 800                         goto out;
 801                 default: /* '?' */
 802                         usage(argv[0]);
 803                         ret = -EINVAL;
 804                         goto out;
 805                 }
 806         }
 807
 808         if (input_path == NULL) {
 809                 fprintf(stderr, "The -i option must always be passed\n\n");
 810                 usage(argv[0]);
 811                 ret = -EINVAL;
 812                 goto out;
 813         }
 814
 815         /*
 816          * When the input format is 'x11grab' set some useful fallback options
 817          * if not supplied by the user, in particular grab full screen
 818          */
 819         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 820                 char *video_size;
 821
 822                 video_size = get_x_screen_size(input_path);
 823
 824                 if (!av_dict_get(options, "video_size", NULL, 0))
 825                         av_dict_set(&options, "video_size", video_size, 0);
 826
 827                 if (!av_dict_get(options, "framerate", NULL, 0))
 828                         av_dict_set(&options, "framerate", "60", 0);
 829
 830                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 831                         av_dict_set(&options, "draw_mouse",  "1", 0);
 832
 833                 free(video_size);
 834         }
 835
 836         ret = set_signal_handler(unset_run);
 837         if (ret < 0) {
 838                 perror("sigaction");
 839                 goto out;
 840         }
 841
 842         ret = am7xxx_init(&ctx);
 843         if (ret < 0) {
 844                 perror("am7xxx_init");
 845                 goto out;
 846         }
 847
 848         am7xxx_set_log_level(ctx, log_level);
 849
 850         ret = am7xxx_open_device(ctx, &dev, device_index);
 851         if (ret < 0) {
 852                 perror("am7xxx_open_device");
 853                 goto cleanup;
 854         }
 855
 856         ret = am7xxx_set_zoom_mode(dev, zoom);
 857         if (ret < 0) {
 858                 perror("am7xxx_set_zoom_mode");
 859                 goto cleanup;
 860         }
 861
 862         ret = am7xxx_set_power_mode(dev, power_mode);
 863         if (ret < 0) {
 864                 perror("am7xxx_set_power_mode");
 865                 goto cleanup;
 866         }
 867
 868         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 869         if (zoom == AM7XXX_ZOOM_TEST)
 870                 goto cleanup;
 871
 872         ret = am7xxx_play(input_format_string,
 873                           &options,
 874                           input_path,
 875                           rescale_method,
 876                           upscale,
 877                           quality,
 878                           format,
 879                           dev,
 880                           dump_frame);
 881         if (ret < 0) {
 882                 fprintf(stderr, "am7xxx_play failed\n");
 883                 goto cleanup;
 884         }
 885
 886 cleanup:
 887         am7xxx_shutdown(ctx);
 888 out:
 889         av_dict_free(&options);
 890         free(input_path);
 891         free(input_format_string);
 892         return ret;
 893 }