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      |= 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         avpicture_fill((AVPicture *)picture_scaled,
 343                        out_buf,
 344                        (output_ctx.codec_ctx)->pix_fmt,
 345                        (output_ctx.codec_ctx)->width,
 346                        (output_ctx.codec_ctx)->height);
 347
 348         sw_scale_ctx = sws_getCachedContext(NULL,
 349                                             (input_ctx.codec_ctx)->width,
 350                                             (input_ctx.codec_ctx)->height,
 351                                             (input_ctx.codec_ctx)->pix_fmt,
 352                                             (output_ctx.codec_ctx)->width,
 353                                             (output_ctx.codec_ctx)->height,
 354                                             (output_ctx.codec_ctx)->pix_fmt,
 355                                             rescale_method,
 356                                             NULL, NULL, NULL);
 357         if (sw_scale_ctx == NULL) {
 358                 fprintf(stderr, "cannot set up the rescaling context!\n");
 359                 ret = -EINVAL;
 360                 goto cleanup_out_buf;
 361         }
 362
 363         got_packet = 0;
 364         while (run) {
 365                 /* read packet */
 366                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
 367                 if (ret < 0) {
 368                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 369                                 ret = 0;
 370                         else
 371                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 372                         run = 0;
 373                         goto end_while;
 374                 }
 375
 376                 if (in_packet.stream_index != input_ctx.video_stream_index) {
 377                         /* that is more or less a "continue", but there is
 378                          * still the packet to free */
 379                         goto end_while;
 380                 }
 381
 382                 /* decode */
 383                 got_picture = 0;
 384                 ret = avcodec_decode_video2(input_ctx.codec_ctx, picture_raw, &got_picture, &in_packet);
 385                 if (ret < 0) {
 386                         fprintf(stderr, "cannot decode video\n");
 387                         run = 0;
 388                         goto end_while;
 389                 }
 390
 391                 /* if we got the complete frame */
 392                 if (got_picture) {
 393                         /*
 394                          * Rescaling the picture also changes its pixel format
 395                          * to the raw format supported by the projector if
 396                          * this was set in video_output_init()
 397                          */
 398                         sws_scale(sw_scale_ctx,
 399                                   (const uint8_t * const *)picture_raw->data,
 400                                   picture_raw->linesize,
 401                                   0,
 402                                   (input_ctx.codec_ctx)->height,
 403                                   picture_scaled->data,
 404                                   picture_scaled->linesize);
 405
 406                         if (output_ctx.raw_output) {
 407                                 out_picture = out_buf;
 408                                 out_picture_size = out_buf_size;
 409                         } else {
 410                                 picture_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 411                                 av_init_packet(&out_packet);
 412                                 out_packet.data = NULL;
 413                                 out_packet.size = 0;
 414                                 got_packet = 0;
 415                                 ret = avcodec_encode_video2(output_ctx.codec_ctx,
 416                                                             &out_packet,
 417                                                             picture_scaled,
 418                                                             &got_packet);
 419                                 if (ret < 0 || !got_packet) {
 420                                         fprintf(stderr, "cannot encode video\n");
 421                                         run = 0;
 422                                         goto end_while;
 423                                 }
 424
 425                                 out_picture = out_packet.data;
 426                                 out_picture_size = out_packet.size;
 427                         }
 428
 429 #ifdef DEBUG
 430                         if (dump_frame) {
 431                                 char filename[NAME_MAX];
 432                                 FILE *file;
 433                                 if (!output_ctx.raw_output)
 434                                         snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 435                                 else
 436                                         snprintf(filename, NAME_MAX, "out.raw");
 437                                 file = fopen(filename, "wb");
 438                                 fwrite(out_picture, 1, out_picture_size, file);
 439                                 fclose(file);
 440                         }
 441 #else
 442                         (void) dump_frame;
 443 #endif
 444
 445                         ret = am7xxx_send_image_async(dev,
 446                                                       image_format,
 447                                                       (output_ctx.codec_ctx)->width,
 448                                                       (output_ctx.codec_ctx)->height,
 449                                                       out_picture,
 450                                                       out_picture_size);
 451                         if (ret < 0) {
 452                                 perror("am7xxx_send_image_async");
 453                                 run = 0;
 454                                 goto end_while;
 455                         }
 456                 }
 457 end_while:
 458                 if (!output_ctx.raw_output && got_packet)
 459                         av_free_packet(&out_packet);
 460                 av_free_packet(&in_packet);
 461         }
 462
 463         sws_freeContext(sw_scale_ctx);
 464 cleanup_out_buf:
 465         av_free(out_buf);
 466 cleanup_picture_scaled:
 467         av_frame_free(&picture_scaled);
 468 cleanup_picture_raw:
 469         av_frame_free(&picture_raw);
 470
 471 cleanup_output:
 472         /* av_free is needed as well,
 473          * see http://libav.org/doxygen/master/avcodec_8h.html#a5d7440cd7ea195bd0b14f21a00ef36dd
 474          */
 475         avcodec_close(output_ctx.codec_ctx);
 476         av_free(output_ctx.codec_ctx);
 477
 478 cleanup_input:
 479         avcodec_close(input_ctx.codec_ctx);
 480         avformat_close_input(&(input_ctx.format_ctx));
 481
 482 out:
 483         return ret;
 484 }
 485
 486 #ifdef HAVE_XCB
 487 #include <xcb/xcb.h>
 488 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 489 {
 490         int i, screen_number;
 491         xcb_connection_t *connection;
 492         const xcb_setup_t *setup;
 493         xcb_screen_iterator_t iter;
 494
 495         connection = xcb_connect(displayname, &screen_number);
 496         if (xcb_connection_has_error(connection)) {
 497                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 498                 return -EINVAL;
 499         }
 500
 501         setup = xcb_get_setup(connection);
 502         if (setup == NULL) {
 503                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 504                 xcb_disconnect(connection);
 505                 return -EINVAL;
 506         }
 507
 508         iter = xcb_setup_roots_iterator(setup);
 509         for (i = 0; i < screen_number; ++i) {
 510                 xcb_screen_next(&iter);
 511         }
 512
 513         xcb_screen_t *screen = iter.data;
 514
 515         *width = screen->width_in_pixels;
 516         *height = screen->height_in_pixels;
 517
 518         xcb_disconnect(connection);
 519
 520         return 0;
 521 }
 522
 523 static char *get_x_screen_size(const char *input_path)
 524 {
 525         int len;
 526         int width;
 527         int height;
 528         char *screen_size;
 529         int ret;
 530
 531         ret = x_get_screen_dimensions(input_path, &width, &height);
 532         if (ret < 0) {
 533                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 534                 return NULL;
 535         }
 536
 537         len = snprintf(NULL, 0, "%dx%d", width, height);
 538
 539         screen_size = malloc((len + 1) * sizeof(char));
 540         if (screen_size == NULL) {
 541                 perror("malloc");
 542                 return NULL;
 543         }
 544
 545         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 546         if (len < 0) {
 547                 free(screen_size);
 548                 screen_size = NULL;
 549                 return NULL;
 550         }
 551         return screen_size;
 552 }
 553 #else
 554 static char *get_x_screen_size(const char *input_path)
 555 {
 556         (void) input_path;
 557         fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
 558         return strdup("vga");
 559 }
 560 #endif
 561
 562 static void unset_run(int signo)
 563 {
 564         (void) signo;
 565         run = 0;
 566 }
 567
 568 #ifdef HAVE_SIGACTION
 569 static int set_signal_handler(void (*signal_handler)(int))
 570 {
 571         struct sigaction new_action;
 572         struct sigaction old_action;
 573         int ret;
 574
 575         new_action.sa_handler = signal_handler;
 576         sigemptyset(&new_action.sa_mask);
 577         new_action.sa_flags = 0;
 578
 579         ret = sigaction(SIGINT, NULL, &old_action);
 580         if (ret < 0) {
 581                 perror("sigaction on old_action");
 582                 goto out;
 583         }
 584
 585         if (old_action.sa_handler != SIG_IGN) {
 586                 ret = sigaction(SIGINT, &new_action, NULL);
 587                 if (ret < 0) {
 588                         perror("sigaction on new_action");
 589                         goto out;
 590                 }
 591         }
 592
 593 out:
 594         return ret;
 595 }
 596 #else
 597 static int set_signal_handler(void (*signal_handler)(int))
 598 {
 599         (void)signal_handler;
 600         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
 601         return 0;
 602 }
 603 #endif
 604
 605
 606 static void usage(char *name)
 607 {
 608         printf("usage: %s [OPTIONS]\n\n", name);
 609         printf("OPTIONS:\n");
 610         printf("\t-d <index>\t\tthe device index (default is 0)\n");
 611 #ifdef DEBUG
 612         printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
 613 #endif
 614         printf("\t-f <input format>\tthe input device format\n");
 615         printf("\t-i <input path>\t\tthe input path\n");
 616         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 617         printf("\t\t\t\tEXAMPLE:\n");
 618         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 619         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 620         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 621         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 622         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 623         printf("\t\t\t\t\t1 - JPEG\n");
 624         printf("\t\t\t\t\t2 - NV12\n");
 625         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 626         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 627         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
 628                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 629         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
 630         printf("\t\t\t\t         the slave connector to be plugged in.\n");
 631         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
 632                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 633         printf("\t-h \t\t\tthis help message\n");
 634         printf("\n\nEXAMPLES OF USE:\n");
 635         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 636         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 637         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 638         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 639 }
 640
 641 int main(int argc, char *argv[])
 642 {
 643         int ret;
 644         int opt;
 645         char *subopts;
 646         char *subopts_saved;
 647         char *subopt;
 648         char *input_format_string = NULL;
 649         AVDictionary *options = NULL;
 650         char *input_path = NULL;
 651         unsigned int rescale_method = SWS_BICUBIC;
 652         unsigned int upscale = 0;
 653         unsigned int quality = 95;
 654         int log_level = AM7XXX_LOG_INFO;
 655         int device_index = 0;
 656         int power_mode = AM7XXX_POWER_LOW;
 657         int zoom = AM7XXX_ZOOM_ORIGINAL;
 658         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 659         am7xxx_context *ctx;
 660         am7xxx_device *dev;
 661         int dump_frame = 0;
 662
 663         while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
 664                 switch (opt) {
 665                 case 'd':
 666                         device_index = atoi(optarg);
 667                         if (device_index < 0) {
 668                                 fprintf(stderr, "Unsupported device index\n");
 669                                 ret = -EINVAL;
 670                                 goto out;
 671                         }
 672                         break;
 673                 case 'D':
 674                         dump_frame = 1;
 675 #ifndef DEBUG
 676                         fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
 677 #endif
 678                         break;
 679                 case 'f':
 680                         input_format_string = strdup(optarg);
 681                         break;
 682                 case 'i':
 683                         input_path = strdup(optarg);
 684                         break;
 685                 case 'o':
 686 #ifdef HAVE_STRTOK_R
 687                         /*
 688                          * parse suboptions, the expected format is something
 689                          * like:
 690                          *   draw_mouse=1,framerate=100,video_size=800x480
 691                          */
 692                         subopts = subopts_saved = strdup(optarg);
 693                         while ((subopt = strtok_r(subopts, ",", &subopts))) {
 694                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 695                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 696                                 if (subopt_value == NULL) {
 697                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 698                                         continue;
 699                                 }
 700                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 701                         }
 702                         free(subopts_saved);
 703 #else
 704                         fprintf(stderr, "Option '-o' not implemented\n");
 705 #endif
 706                         break;
 707                 case 's':
 708                         rescale_method = atoi(optarg);
 709                         switch(rescale_method) {
 710                         case SWS_FAST_BILINEAR:
 711                         case SWS_BILINEAR:
 712                         case SWS_BICUBIC:
 713                         case SWS_X:
 714                         case SWS_POINT:
 715                         case SWS_AREA:
 716                         case SWS_BICUBLIN:
 717                         case SWS_GAUSS:
 718                         case SWS_SINC:
 719                         case SWS_LANCZOS:
 720                         case SWS_SPLINE:
 721                                 break;
 722                         default:
 723                                 fprintf(stderr, "Unsupported rescale method\n");
 724                                 ret = -EINVAL;
 725                                 goto out;
 726                         }
 727                         break;
 728                 case 'u':
 729                         upscale = 1;
 730                         break;
 731                 case 'F':
 732                         format = atoi(optarg);
 733                         switch(format) {
 734                         case AM7XXX_IMAGE_FORMAT_JPEG:
 735                                 fprintf(stdout, "JPEG format\n");
 736                                 break;
 737                         case AM7XXX_IMAGE_FORMAT_NV12:
 738                                 fprintf(stdout, "NV12 format\n");
 739                                 break;
 740                         default:
 741                                 fprintf(stderr, "Unsupported format\n");
 742                                 ret = -EINVAL;
 743                                 goto out;
 744                         }
 745                         break;
 746                 case 'q':
 747                         quality = atoi(optarg);
 748                         if (quality < 1 || quality > 100) {
 749                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 750                                 ret = -EINVAL;
 751                                 goto out;
 752                         }
 753                         break;
 754                 case 'l':
 755                         log_level = atoi(optarg);
 756                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 757                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 758                                 log_level = AM7XXX_LOG_ERROR;
 759                         }
 760                         break;
 761                 case 'p':
 762                         power_mode = atoi(optarg);
 763                         switch(power_mode) {
 764                         case AM7XXX_POWER_OFF:
 765                         case AM7XXX_POWER_LOW:
 766                         case AM7XXX_POWER_MIDDLE:
 767                         case AM7XXX_POWER_HIGH:
 768                         case AM7XXX_POWER_TURBO:
 769                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 770                                 break;
 771                         default:
 772                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 773                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 774                                 ret = -EINVAL;
 775                                 goto out;
 776                         }
 777                         break;
 778                 case 'z':
 779                         zoom = atoi(optarg);
 780                         switch(zoom) {
 781                         case AM7XXX_ZOOM_ORIGINAL:
 782                         case AM7XXX_ZOOM_H:
 783                         case AM7XXX_ZOOM_H_V:
 784                         case AM7XXX_ZOOM_TEST:
 785                         case AM7XXX_ZOOM_TELE:
 786                                 fprintf(stdout, "Zoom: %d\n", zoom);
 787                                 break;
 788                         default:
 789                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 790                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 791                                 ret = -EINVAL;
 792                                 goto out;
 793                         }
 794                         break;
 795                 case 'h':
 796                         usage(argv[0]);
 797                         ret = 0;
 798                         goto out;
 799                 default: /* '?' */
 800                         usage(argv[0]);
 801                         ret = -EINVAL;
 802                         goto out;
 803                 }
 804         }
 805
 806         if (input_path == NULL) {
 807                 fprintf(stderr, "The -i option must always be passed\n\n");
 808                 usage(argv[0]);
 809                 ret = -EINVAL;
 810                 goto out;
 811         }
 812
 813         /*
 814          * When the input format is 'x11grab' set some useful fallback options
 815          * if not supplied by the user, in particular grab full screen
 816          */
 817         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 818                 char *video_size;
 819
 820                 video_size = get_x_screen_size(input_path);
 821
 822                 if (!av_dict_get(options, "video_size", NULL, 0))
 823                         av_dict_set(&options, "video_size", video_size, 0);
 824
 825                 if (!av_dict_get(options, "framerate", NULL, 0))
 826                         av_dict_set(&options, "framerate", "60", 0);
 827
 828                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 829                         av_dict_set(&options, "draw_mouse",  "1", 0);
 830
 831                 free(video_size);
 832         }
 833
 834         ret = set_signal_handler(unset_run);
 835         if (ret < 0) {
 836                 perror("sigaction");
 837                 goto out;
 838         }
 839
 840         ret = am7xxx_init(&ctx);
 841         if (ret < 0) {
 842                 perror("am7xxx_init");
 843                 goto out;
 844         }
 845
 846         am7xxx_set_log_level(ctx, log_level);
 847
 848         ret = am7xxx_open_device(ctx, &dev, device_index);
 849         if (ret < 0) {
 850                 perror("am7xxx_open_device");
 851                 goto cleanup;
 852         }
 853
 854         ret = am7xxx_set_zoom_mode(dev, zoom);
 855         if (ret < 0) {
 856                 perror("am7xxx_set_zoom_mode");
 857                 goto cleanup;
 858         }
 859
 860         ret = am7xxx_set_power_mode(dev, power_mode);
 861         if (ret < 0) {
 862                 perror("am7xxx_set_power_mode");
 863                 goto cleanup;
 864         }
 865
 866         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 867         if (zoom == AM7XXX_ZOOM_TEST)
 868                 goto cleanup;
 869
 870         ret = am7xxx_play(input_format_string,
 871                           &options,
 872                           input_path,
 873                           rescale_method,
 874                           upscale,
 875                           quality,
 876                           format,
 877                           dev,
 878                           dump_frame);
 879         if (ret < 0) {
 880                 fprintf(stderr, "am7xxx_play failed\n");
 881                 goto cleanup;
 882         }
 883
 884 cleanup:
 885         am7xxx_shutdown(ctx);
 886 out:
 887         av_dict_free(&options);
 888         free(input_path);
 889         free(input_format_string);
 890         return ret;
 891 }