examples/am7xxx-play.c

   1 /*
   2  * am7xxx-play - play stuff on an am7xxx device (e.g. Acer C110, PicoPix 1020)
   3  *
   4  * Copyright (C) 2012-2014  Antonio Ospite <ao2@ao2.it>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /**
  21  * @example examples/am7xxx-play.c
  22  * am7xxx-play uses libavdevice, libavformat, libavcodec and libswscale to
  23  * decode the input, encode it to jpeg and display it with libam7xxx.
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdint.h>
  28 #include <string.h>
  29 #include <signal.h>
  30 #include <getopt.h>
  31
  32 #include <libavdevice/avdevice.h>
  33 #include <libavformat/avformat.h>
  34 #include <libavutil/imgutils.h>
  35 #include <libswscale/swscale.h>
  36
  37 #include <am7xxx.h>
  38
  39 static unsigned int run = 1;
  40
  41 struct video_input_ctx {
  42         AVFormatContext *format_ctx;
  43         AVCodecContext  *codec_ctx;
  44         int video_stream_index;
  45 };
  46
  47 static int video_input_init(struct video_input_ctx *input_ctx,
  48                             const char *input_format_string,
  49                             const char *input_path,
  50                             AVDictionary **input_options)
  51 {
  52         AVInputFormat *input_format = NULL;
  53         AVFormatContext *input_format_ctx;
  54         AVCodecParameters *input_codec_params;
  55         AVCodecContext *input_codec_ctx;
  56         AVCodec *input_codec;
  57         int video_index;
  58         int ret;
  59
  60         avdevice_register_all();
  61         avcodec_register_all();
  62         av_register_all();
  63
  64         if (input_format_string) {
  65                 /* find the desired input format */
  66                 input_format = av_find_input_format(input_format_string);
  67                 if (input_format == NULL) {
  68                         fprintf(stderr, "cannot find input format\n");
  69                         ret = -ENODEV;
  70                         goto out;
  71                 }
  72         }
  73
  74         if (input_path == NULL) {
  75                 fprintf(stderr, "input_path must not be NULL!\n");
  76                 ret = -EINVAL;
  77                 goto out;
  78         }
  79
  80         /* open the input format/device */
  81         input_format_ctx = NULL;
  82         ret = avformat_open_input(&input_format_ctx,
  83                                   input_path,
  84                                   input_format,
  85                                   input_options);
  86         if (ret < 0) {
  87                 fprintf(stderr, "cannot open input format/device\n");
  88                 goto out;
  89         }
  90
  91         /* get information on the input stream (e.g. format, bitrate, framerate) */
  92         ret = avformat_find_stream_info(input_format_ctx, NULL);
  93         if (ret < 0) {
  94                 fprintf(stderr, "cannot get information on the stream\n");
  95                 goto cleanup;
  96         }
  97
  98         /* dump what was found */
  99         av_dump_format(input_format_ctx, 0, input_path, 0);
 100
 101         /* look for the first video_stream */
 102         video_index = av_find_best_stream(input_format_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, &input_codec, 0);
 103         if (video_index < 0) {
 104                 fprintf(stderr, "cannot find any video streams\n");
 105                 ret = -EINVAL;
 106                 goto cleanup;
 107         }
 108
 109         input_codec_ctx = avcodec_alloc_context3(input_codec);
 110         if (input_codec_ctx == NULL) {
 111                 fprintf(stderr, "failed to allocate the input codec context\n");
 112                 ret = -ENOMEM;
 113                 goto cleanup;
 114         }
 115
 116         input_codec_params = input_format_ctx->streams[video_index]->codecpar;
 117         ret = avcodec_parameters_to_context(input_codec_ctx, input_codec_params);
 118         if (ret < 0) {
 119                 fprintf(stderr, "cannot copy parameters to input codec context\n");
 120                 goto cleanup_ctx;
 121         }
 122
 123         /* open the decoder */
 124         ret = avcodec_open2(input_codec_ctx, input_codec, NULL);
 125         if (ret < 0) {
 126                 fprintf(stderr, "cannot open input codec\n");
 127                 goto cleanup_ctx;
 128         }
 129
 130         input_ctx->format_ctx = input_format_ctx;
 131         input_ctx->codec_ctx = input_codec_ctx;
 132         input_ctx->video_stream_index = video_index;
 133
 134         ret = 0;
 135         goto out;
 136
 137 cleanup_ctx:
 138         avcodec_free_context(&input_codec_ctx);
 139 cleanup:
 140         avformat_close_input(&input_format_ctx);
 141 out:
 142         av_dict_free(input_options);
 143         *input_options = NULL;
 144         return ret;
 145 }
 146
 147
 148 struct video_output_ctx {
 149         AVCodecContext  *codec_ctx;
 150         int raw_output;
 151 };
 152
 153 static int video_output_init(struct video_output_ctx *output_ctx,
 154                              struct video_input_ctx *input_ctx,
 155                              unsigned int upscale,
 156                              unsigned int quality,
 157                              am7xxx_image_format image_format,
 158                              am7xxx_device *dev)
 159 {
 160         AVCodecContext *output_codec_ctx;
 161         AVCodec *output_codec;
 162         unsigned int new_output_width;
 163         unsigned int new_output_height;
 164         int ret;
 165
 166         if (input_ctx == NULL) {
 167                 fprintf(stderr, "input_ctx must not be NULL!\n");
 168                 ret = -EINVAL;
 169                 goto out;
 170         }
 171
 172         /* create the encoder context */
 173         output_codec_ctx = avcodec_alloc_context3(NULL);
 174         if (output_codec_ctx == NULL) {
 175                 fprintf(stderr, "cannot allocate output codec context!\n");
 176                 ret = -ENOMEM;
 177                 goto out;
 178         }
 179
 180         /* Calculate the new output dimension so the original frame is shown
 181          * in its entirety */
 182         ret = am7xxx_calc_scaled_image_dimensions(dev,
 183                                                   upscale,
 184                                                   (input_ctx->codec_ctx)->width,
 185                                                   (input_ctx->codec_ctx)->height,
 186                                                   &new_output_width,
 187                                                   &new_output_height);
 188         if (ret < 0) {
 189                 fprintf(stderr, "cannot calculate output dimension\n");
 190                 goto cleanup;
 191         }
 192
 193         /* put sample parameters */
 194         output_codec_ctx->bit_rate   = (input_ctx->codec_ctx)->bit_rate;
 195         output_codec_ctx->width      = new_output_width;
 196         output_codec_ctx->height     = new_output_height;
 197         output_codec_ctx->time_base.num  =
 198                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.num;
 199         output_codec_ctx->time_base.den  =
 200                 (input_ctx->format_ctx)->streams[input_ctx->video_stream_index]->time_base.den;
 201
 202         /* When the raw format is requested we don't actually need to setup
 203          * and open a decoder
 204          */
 205         if (image_format == AM7XXX_IMAGE_FORMAT_NV12) {
 206                 fprintf(stdout, "using raw output format\n");
 207                 output_codec_ctx->pix_fmt    = AV_PIX_FMT_NV12;
 208                 output_ctx->codec_ctx = output_codec_ctx;
 209                 output_ctx->raw_output = 1;
 210                 ret = 0;
 211                 goto out;
 212         }
 213
 214         /* YUVJ420P is deprecated in swscaler, but mjpeg still relies on it. */
 215         output_codec_ctx->pix_fmt    = AV_PIX_FMT_YUVJ420P;
 216         output_codec_ctx->codec_id   = AV_CODEC_ID_MJPEG;
 217         output_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
 218
 219         /* Set quality and other VBR settings */
 220
 221         /* @note: 'quality' is expected to be between 1 and 100, but a value
 222          * between 0 to 99 has to be passed when calculating qmin and qmax.
 223          * This way qmin and qmax will cover the range 1-FF_QUALITY_SCALE, and
 224          * in particular they won't be 0, this is needed because they are used
 225          * as divisor somewhere in the encoding process */
 226         output_codec_ctx->qmin       = output_codec_ctx->qmax = ((100 - (quality - 1)) * FF_QUALITY_SCALE) / 100;
 227         output_codec_ctx->mb_lmin    = output_codec_ctx->qmin * FF_QP2LAMBDA;
 228         output_codec_ctx->mb_lmax    = output_codec_ctx->qmax * FF_QP2LAMBDA;
 229         output_codec_ctx->flags      |= AV_CODEC_FLAG_QSCALE;
 230         output_codec_ctx->global_quality = output_codec_ctx->qmin * FF_QP2LAMBDA;
 231
 232         /* find the encoder */
 233         output_codec = avcodec_find_encoder(output_codec_ctx->codec_id);
 234         if (output_codec == NULL) {
 235                 fprintf(stderr, "cannot find output codec!\n");
 236                 ret = -EINVAL;
 237                 goto cleanup;
 238         }
 239
 240         /* open the codec */
 241         ret = avcodec_open2(output_codec_ctx, output_codec, NULL);
 242         if (ret < 0) {
 243                 fprintf(stderr, "could not open output codec!\n");
 244                 goto cleanup;
 245         }
 246
 247         output_ctx->codec_ctx = output_codec_ctx;
 248         output_ctx->raw_output = 0;
 249
 250         ret = 0;
 251         goto out;
 252
 253 cleanup:
 254         avcodec_free_context(&output_codec_ctx);
 255 out:
 256         return ret;
 257 }
 258
 259
 260 /*
 261  * Wrap the new avcodec API from FFMpeg 3.1 to minimize the changes in the
 262  * user code.
 263  *
 264  * If the use of the wrappers were to be made conditional, a check like the
 265  * following could be used:
 266  *
 267  *      #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 48, 101))
 268  *
 269  * As derived from the APIchanges document:
 270  * https://github.com/FFmpeg/FFmpeg/blob/master/doc/APIchanges
 271  *
 272  * The wrapper implementation has been taken from:
 273  * https://blogs.gentoo.org/lu_zero/2016/03/29/new-avcodec-api/
 274  */
 275 static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
 276 {
 277         int ret;
 278
 279         *got_frame = 0;
 280
 281         if (pkt) {
 282                 ret = avcodec_send_packet(avctx, pkt);
 283                 /*
 284                  * In particular, we don't expect AVERROR(EAGAIN), because we
 285                  * read all decoded frames with avcodec_receive_frame() until
 286                  * done.
 287                  */
 288                 if (ret < 0)
 289                         return ret == AVERROR_EOF ? 0 : ret;
 290         }
 291
 292         ret = avcodec_receive_frame(avctx, frame);
 293         if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
 294                 return ret;
 295         if (ret >= 0)
 296                 *got_frame = 1;
 297
 298         return 0;
 299 }
 300
 301 static int encode(AVCodecContext *avctx, AVPacket *pkt, int *got_packet, AVFrame *frame)
 302 {
 303         int ret;
 304
 305         *got_packet = 0;
 306
 307         ret = avcodec_send_frame(avctx, frame);
 308         if (ret < 0)
 309                 return ret;
 310
 311         ret = avcodec_receive_packet(avctx, pkt);
 312         if (!ret)
 313                 *got_packet = 1;
 314         if (ret == AVERROR(EAGAIN))
 315                 return 0;
 316
 317         return ret;
 318 }
 319
 320
 321 static int am7xxx_play(const char *input_format_string,
 322                        AVDictionary **input_options,
 323                        const char *input_path,
 324                        unsigned int rescale_method,
 325                        unsigned int upscale,
 326                        unsigned int quality,
 327                        am7xxx_image_format image_format,
 328                        am7xxx_device *dev,
 329                        int dump_frame)
 330 {
 331         struct video_input_ctx input_ctx;
 332         struct video_output_ctx output_ctx;
 333         AVFrame *frame_raw;
 334         AVFrame *frame_scaled;
 335         int out_buf_size;
 336         uint8_t *out_buf;
 337         int out_frame_size;
 338         uint8_t *out_frame;
 339         struct SwsContext *sw_scale_ctx;
 340         AVPacket in_packet;
 341         AVPacket out_packet;
 342         int got_frame;
 343         int got_packet;
 344         int ret;
 345
 346         ret = video_input_init(&input_ctx, input_format_string, input_path, input_options);
 347         if (ret < 0) {
 348                 fprintf(stderr, "cannot initialize input\n");
 349                 goto out;
 350         }
 351
 352         ret = video_output_init(&output_ctx, &input_ctx, upscale, quality, image_format, dev);
 353         if (ret < 0) {
 354                 fprintf(stderr, "cannot initialize input\n");
 355                 goto cleanup_input;
 356         }
 357
 358         /* allocate an input frame */
 359         frame_raw = av_frame_alloc();
 360         if (frame_raw == NULL) {
 361                 fprintf(stderr, "cannot allocate the raw frame!\n");
 362                 ret = -ENOMEM;
 363                 goto cleanup_output;
 364         }
 365
 366         /* allocate output frame */
 367         frame_scaled = av_frame_alloc();
 368         if (frame_scaled == NULL) {
 369                 fprintf(stderr, "cannot allocate the scaled frame!\n");
 370                 ret = -ENOMEM;
 371                 goto cleanup_frame_raw;
 372         }
 373         frame_scaled->format = (output_ctx.codec_ctx)->pix_fmt;
 374         frame_scaled->width = (output_ctx.codec_ctx)->width;
 375         frame_scaled->height = (output_ctx.codec_ctx)->height;
 376
 377         /* calculate the bytes needed for the output image and create buffer for the output image */
 378         out_buf_size = av_image_get_buffer_size((output_ctx.codec_ctx)->pix_fmt,
 379                                                 (output_ctx.codec_ctx)->width,
 380                                                 (output_ctx.codec_ctx)->height,
 381                                                 1);
 382         out_buf = av_malloc(out_buf_size * sizeof(uint8_t));
 383         if (out_buf == NULL) {
 384                 fprintf(stderr, "cannot allocate output data buffer!\n");
 385                 ret = -ENOMEM;
 386                 goto cleanup_frame_scaled;
 387         }
 388
 389         /* assign appropriate parts of buffer to image planes in frame_scaled */
 390         av_image_fill_arrays(frame_scaled->data,
 391                              frame_scaled->linesize,
 392                              out_buf,
 393                              (output_ctx.codec_ctx)->pix_fmt,
 394                              (output_ctx.codec_ctx)->width,
 395                              (output_ctx.codec_ctx)->height,
 396                              1);
 397
 398         sw_scale_ctx = sws_getCachedContext(NULL,
 399                                             (input_ctx.codec_ctx)->width,
 400                                             (input_ctx.codec_ctx)->height,
 401                                             (input_ctx.codec_ctx)->pix_fmt,
 402                                             (output_ctx.codec_ctx)->width,
 403                                             (output_ctx.codec_ctx)->height,
 404                                             (output_ctx.codec_ctx)->pix_fmt,
 405                                             rescale_method,
 406                                             NULL, NULL, NULL);
 407         if (sw_scale_ctx == NULL) {
 408                 fprintf(stderr, "cannot set up the rescaling context!\n");
 409                 ret = -EINVAL;
 410                 goto cleanup_out_buf;
 411         }
 412
 413         got_packet = 0;
 414         while (run) {
 415                 /* read packet */
 416                 ret = av_read_frame(input_ctx.format_ctx, &in_packet);
 417                 if (ret < 0) {
 418                         if (ret == (int)AVERROR_EOF || input_ctx.format_ctx->pb->eof_reached)
 419                                 ret = 0;
 420                         else
 421                                 fprintf(stderr, "av_read_frame failed, EOF?\n");
 422                         run = 0;
 423                         goto end_while;
 424                 }
 425
 426                 if (in_packet.stream_index != input_ctx.video_stream_index) {
 427                         /* that is more or less a "continue", but there is
 428                          * still the packet to free */
 429                         goto end_while;
 430                 }
 431
 432                 /* decode */
 433                 got_frame = 0;
 434                 ret = decode(input_ctx.codec_ctx, frame_raw, &got_frame, &in_packet);
 435                 if (ret < 0) {
 436                         fprintf(stderr, "cannot decode video\n");
 437                         run = 0;
 438                         goto end_while;
 439                 }
 440
 441                 /* if we got the complete frame */
 442                 if (got_frame) {
 443                         /*
 444                          * Rescaling the frame also changes its pixel format
 445                          * to the raw format supported by the projector if
 446                          * this was set in video_output_init()
 447                          */
 448                         sws_scale(sw_scale_ctx,
 449                                   (const uint8_t * const *)frame_raw->data,
 450                                   frame_raw->linesize,
 451                                   0,
 452                                   (input_ctx.codec_ctx)->height,
 453                                   frame_scaled->data,
 454                                   frame_scaled->linesize);
 455
 456                         if (output_ctx.raw_output) {
 457                                 out_frame = out_buf;
 458                                 out_frame_size = out_buf_size;
 459                         } else {
 460                                 frame_scaled->quality = (output_ctx.codec_ctx)->global_quality;
 461                                 av_init_packet(&out_packet);
 462                                 out_packet.data = NULL;
 463                                 out_packet.size = 0;
 464                                 got_packet = 0;
 465                                 ret = encode(output_ctx.codec_ctx,
 466                                              &out_packet,
 467                                              &got_packet,
 468                                              frame_scaled);
 469                                 if (ret < 0 || !got_packet) {
 470                                         fprintf(stderr, "cannot encode video\n");
 471                                         run = 0;
 472                                         goto end_while;
 473                                 }
 474
 475                                 out_frame = out_packet.data;
 476                                 out_frame_size = out_packet.size;
 477                         }
 478
 479 #ifdef DEBUG
 480                         if (dump_frame) {
 481                                 char filename[NAME_MAX];
 482                                 FILE *file;
 483                                 if (!output_ctx.raw_output)
 484                                         snprintf(filename, NAME_MAX, "out_q%03d.jpg", quality);
 485                                 else
 486                                         snprintf(filename, NAME_MAX, "out.raw");
 487                                 file = fopen(filename, "wb");
 488                                 fwrite(out_frame, 1, out_frame_size, file);
 489                                 fclose(file);
 490                         }
 491 #else
 492                         (void) dump_frame;
 493 #endif
 494
 495                         ret = am7xxx_send_image_async(dev,
 496                                                       image_format,
 497                                                       (output_ctx.codec_ctx)->width,
 498                                                       (output_ctx.codec_ctx)->height,
 499                                                       out_frame,
 500                                                       out_frame_size);
 501                         if (ret < 0) {
 502                                 perror("am7xxx_send_image_async");
 503                                 run = 0;
 504                                 goto end_while;
 505                         }
 506                 }
 507 end_while:
 508                 if (!output_ctx.raw_output && got_packet)
 509                         av_packet_unref(&out_packet);
 510                 av_packet_unref(&in_packet);
 511         }
 512
 513         sws_freeContext(sw_scale_ctx);
 514 cleanup_out_buf:
 515         av_free(out_buf);
 516 cleanup_frame_scaled:
 517         av_frame_free(&frame_scaled);
 518 cleanup_frame_raw:
 519         av_frame_free(&frame_raw);
 520
 521 cleanup_output:
 522         /* Freeing the codec context is needed as well,
 523          * see https://libav.org/documentation/doxygen/master/group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f
 524          */
 525         avcodec_close(output_ctx.codec_ctx);
 526         avcodec_free_context(&(output_ctx.codec_ctx));
 527
 528 cleanup_input:
 529         avcodec_close(input_ctx.codec_ctx);
 530         avcodec_free_context(&(input_ctx.codec_ctx));
 531         avformat_close_input(&(input_ctx.format_ctx));
 532
 533 out:
 534         return ret;
 535 }
 536
 537 #ifdef HAVE_XCB
 538 #include <xcb/xcb.h>
 539 static int x_get_screen_dimensions(const char *displayname, int *width, int *height)
 540 {
 541         int i, screen_number;
 542         xcb_connection_t *connection;
 543         const xcb_setup_t *setup;
 544         xcb_screen_iterator_t iter;
 545
 546         connection = xcb_connect(displayname, &screen_number);
 547         if (xcb_connection_has_error(connection)) {
 548                 fprintf(stderr, "Cannot open a connection to %s\n", displayname);
 549                 return -EINVAL;
 550         }
 551
 552         setup = xcb_get_setup(connection);
 553         if (setup == NULL) {
 554                 fprintf(stderr, "Cannot get setup for %s\n", displayname);
 555                 xcb_disconnect(connection);
 556                 return -EINVAL;
 557         }
 558
 559         iter = xcb_setup_roots_iterator(setup);
 560         for (i = 0; i < screen_number; ++i) {
 561                 xcb_screen_next(&iter);
 562         }
 563
 564         xcb_screen_t *screen = iter.data;
 565
 566         *width = screen->width_in_pixels;
 567         *height = screen->height_in_pixels;
 568
 569         xcb_disconnect(connection);
 570
 571         return 0;
 572 }
 573
 574 static char *get_x_screen_size(const char *input_path)
 575 {
 576         int len;
 577         int width;
 578         int height;
 579         char *screen_size;
 580         int ret;
 581
 582         ret = x_get_screen_dimensions(input_path, &width, &height);
 583         if (ret < 0) {
 584                 fprintf(stderr, "Cannot get screen dimensions for %s\n", input_path);
 585                 return NULL;
 586         }
 587
 588         len = snprintf(NULL, 0, "%dx%d", width, height);
 589
 590         screen_size = malloc((len + 1) * sizeof(char));
 591         if (screen_size == NULL) {
 592                 perror("malloc");
 593                 return NULL;
 594         }
 595
 596         len = snprintf(screen_size, len + 1, "%dx%d", width, height);
 597         if (len < 0) {
 598                 free(screen_size);
 599                 screen_size = NULL;
 600                 return NULL;
 601         }
 602         return screen_size;
 603 }
 604 #else
 605 static char *get_x_screen_size(const char *input_path)
 606 {
 607         (void) input_path;
 608         fprintf(stderr, "%s: fallback implementation, assuming a vga screen\n", __func__);
 609         return strdup("vga");
 610 }
 611 #endif
 612
 613 static void unset_run(int signo)
 614 {
 615         (void) signo;
 616         run = 0;
 617 }
 618
 619 #ifdef HAVE_SIGACTION
 620 static int set_signal_handler(void (*signal_handler)(int))
 621 {
 622         struct sigaction new_action;
 623         struct sigaction old_action;
 624         int ret;
 625
 626         new_action.sa_handler = signal_handler;
 627         sigemptyset(&new_action.sa_mask);
 628         new_action.sa_flags = 0;
 629
 630         ret = sigaction(SIGINT, NULL, &old_action);
 631         if (ret < 0) {
 632                 perror("sigaction on old_action");
 633                 goto out;
 634         }
 635
 636         if (old_action.sa_handler != SIG_IGN) {
 637                 ret = sigaction(SIGINT, &new_action, NULL);
 638                 if (ret < 0) {
 639                         perror("sigaction on new_action");
 640                         goto out;
 641                 }
 642         }
 643
 644 out:
 645         return ret;
 646 }
 647 #else
 648 static int set_signal_handler(void (*signal_handler)(int))
 649 {
 650         (void)signal_handler;
 651         fprintf(stderr, "set_signal_handler() not implemented, sigaction not available\n");
 652         return 0;
 653 }
 654 #endif
 655
 656
 657 static void usage(char *name)
 658 {
 659         printf("usage: %s [OPTIONS]\n\n", name);
 660         printf("OPTIONS:\n");
 661         printf("\t-d <index>\t\tthe device index (default is 0)\n");
 662 #ifdef DEBUG
 663         printf("\t-D \t\t\tdump the last frame to a file (only active in DEBUG mode)\n");
 664 #endif
 665         printf("\t-f <input format>\tthe input device format\n");
 666         printf("\t-i <input path>\t\tthe input path\n");
 667         printf("\t-o <options>\t\ta comma separated list of input format options\n");
 668         printf("\t\t\t\tEXAMPLE:\n");
 669         printf("\t\t\t\t\t-o draw_mouse=1,framerate=100,video_size=800x480\n");
 670         printf("\t-s <scaling method>\tthe rescaling method (see swscale.h)\n");
 671         printf("\t-u \t\t\tupscale the image if smaller than the display dimensions\n");
 672         printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
 673         printf("\t\t\t\tSUPPORTED FORMATS:\n");
 674         printf("\t\t\t\t\t1 - JPEG\n");
 675         printf("\t\t\t\t\t2 - NV12\n");
 676         printf("\t-q <quality>\t\tquality of jpeg sent to the device, between 1 and 100\n");
 677         printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
 678         printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
 679                AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 680         printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
 681         printf("\t\t\t\t         the slave connector to be plugged in.\n");
 682         printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (tele)\n",
 683                AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 684         printf("\t-h \t\t\tthis help message\n");
 685         printf("\n\nEXAMPLES OF USE:\n");
 686         printf("\t%s -f x11grab -i :0.0 -o video_size=800x480\n", name);
 687         printf("\t%s -f fbdev -i /dev/fb0\n", name);
 688         printf("\t%s -f video4linux2 -i /dev/video0 -o video_size=320x240,frame_rate=100 -u -q 90\n", name);
 689         printf("\t%s -i http://download.blender.org/peach/bigbuckbunny_movies/BigBuckBunny_640x360.m4v\n", name);
 690 }
 691
 692 int main(int argc, char *argv[])
 693 {
 694         int ret;
 695         int opt;
 696         char *subopts;
 697         char *subopts_saved;
 698         char *subopt;
 699         char *input_format_string = NULL;
 700         AVDictionary *options = NULL;
 701         char *input_path = NULL;
 702         unsigned int rescale_method = SWS_BICUBIC;
 703         unsigned int upscale = 0;
 704         unsigned int quality = 95;
 705         int log_level = AM7XXX_LOG_INFO;
 706         int device_index = 0;
 707         int power_mode = AM7XXX_POWER_LOW;
 708         int zoom = AM7XXX_ZOOM_ORIGINAL;
 709         int format = AM7XXX_IMAGE_FORMAT_JPEG;
 710         am7xxx_context *ctx;
 711         am7xxx_device *dev;
 712         int dump_frame = 0;
 713
 714         while ((opt = getopt(argc, argv, "d:Df:i:o:s:uF:q:l:p:z:h")) != -1) {
 715                 switch (opt) {
 716                 case 'd':
 717                         device_index = atoi(optarg);
 718                         if (device_index < 0) {
 719                                 fprintf(stderr, "Unsupported device index\n");
 720                                 ret = -EINVAL;
 721                                 goto out;
 722                         }
 723                         break;
 724                 case 'D':
 725                         dump_frame = 1;
 726 #ifndef DEBUG
 727                         fprintf(stderr, "Warning: the -D option is only active in DEBUG mode.\n");
 728 #endif
 729                         break;
 730                 case 'f':
 731                         input_format_string = strdup(optarg);
 732                         break;
 733                 case 'i':
 734                         input_path = strdup(optarg);
 735                         break;
 736                 case 'o':
 737 #ifdef HAVE_STRTOK_R
 738                         /*
 739                          * parse suboptions, the expected format is something
 740                          * like:
 741                          *   draw_mouse=1,framerate=100,video_size=800x480
 742                          */
 743                         subopts = subopts_saved = strdup(optarg);
 744                         while ((subopt = strtok_r(subopts, ",", &subopts))) {
 745                                 char *subopt_name = strtok_r(subopt, "=", &subopt);
 746                                 char *subopt_value = strtok_r(NULL, "", &subopt);
 747                                 if (subopt_value == NULL) {
 748                                         fprintf(stderr, "invalid suboption: %s\n", subopt_name);
 749                                         continue;
 750                                 }
 751                                 av_dict_set(&options, subopt_name, subopt_value, 0);
 752                         }
 753                         free(subopts_saved);
 754 #else
 755                         fprintf(stderr, "Option '-o' not implemented\n");
 756 #endif
 757                         break;
 758                 case 's':
 759                         rescale_method = atoi(optarg);
 760                         switch(rescale_method) {
 761                         case SWS_FAST_BILINEAR:
 762                         case SWS_BILINEAR:
 763                         case SWS_BICUBIC:
 764                         case SWS_X:
 765                         case SWS_POINT:
 766                         case SWS_AREA:
 767                         case SWS_BICUBLIN:
 768                         case SWS_GAUSS:
 769                         case SWS_SINC:
 770                         case SWS_LANCZOS:
 771                         case SWS_SPLINE:
 772                                 break;
 773                         default:
 774                                 fprintf(stderr, "Unsupported rescale method\n");
 775                                 ret = -EINVAL;
 776                                 goto out;
 777                         }
 778                         break;
 779                 case 'u':
 780                         upscale = 1;
 781                         break;
 782                 case 'F':
 783                         format = atoi(optarg);
 784                         switch(format) {
 785                         case AM7XXX_IMAGE_FORMAT_JPEG:
 786                                 fprintf(stdout, "JPEG format\n");
 787                                 break;
 788                         case AM7XXX_IMAGE_FORMAT_NV12:
 789                                 fprintf(stdout, "NV12 format\n");
 790                                 break;
 791                         default:
 792                                 fprintf(stderr, "Unsupported format\n");
 793                                 ret = -EINVAL;
 794                                 goto out;
 795                         }
 796                         break;
 797                 case 'q':
 798                         quality = atoi(optarg);
 799                         if (quality < 1 || quality > 100) {
 800                                 fprintf(stderr, "Invalid quality value, must be between 1 and 100\n");
 801                                 ret = -EINVAL;
 802                                 goto out;
 803                         }
 804                         break;
 805                 case 'l':
 806                         log_level = atoi(optarg);
 807                         if (log_level < AM7XXX_LOG_FATAL || log_level > AM7XXX_LOG_TRACE) {
 808                                 fprintf(stderr, "Unsupported log level, falling back to AM7XXX_LOG_ERROR\n");
 809                                 log_level = AM7XXX_LOG_ERROR;
 810                         }
 811                         break;
 812                 case 'p':
 813                         power_mode = atoi(optarg);
 814                         switch(power_mode) {
 815                         case AM7XXX_POWER_OFF:
 816                         case AM7XXX_POWER_LOW:
 817                         case AM7XXX_POWER_MIDDLE:
 818                         case AM7XXX_POWER_HIGH:
 819                         case AM7XXX_POWER_TURBO:
 820                                 fprintf(stdout, "Power mode: %d\n", power_mode);
 821                                 break;
 822                         default:
 823                                 fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
 824                                         AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
 825                                 ret = -EINVAL;
 826                                 goto out;
 827                         }
 828                         break;
 829                 case 'z':
 830                         zoom = atoi(optarg);
 831                         switch(zoom) {
 832                         case AM7XXX_ZOOM_ORIGINAL:
 833                         case AM7XXX_ZOOM_H:
 834                         case AM7XXX_ZOOM_H_V:
 835                         case AM7XXX_ZOOM_TEST:
 836                         case AM7XXX_ZOOM_TELE:
 837                                 fprintf(stdout, "Zoom: %d\n", zoom);
 838                                 break;
 839                         default:
 840                                 fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
 841                                         AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);
 842                                 ret = -EINVAL;
 843                                 goto out;
 844                         }
 845                         break;
 846                 case 'h':
 847                         usage(argv[0]);
 848                         ret = 0;
 849                         goto out;
 850                 default: /* '?' */
 851                         usage(argv[0]);
 852                         ret = -EINVAL;
 853                         goto out;
 854                 }
 855         }
 856
 857         if (input_path == NULL) {
 858                 fprintf(stderr, "The -i option must always be passed\n\n");
 859                 usage(argv[0]);
 860                 ret = -EINVAL;
 861                 goto out;
 862         }
 863
 864         /*
 865          * When the input format is 'x11grab' set some useful fallback options
 866          * if not supplied by the user, in particular grab full screen
 867          */
 868         if (input_format_string && strcmp(input_format_string, "x11grab") == 0) {
 869                 char *video_size;
 870
 871                 video_size = get_x_screen_size(input_path);
 872
 873                 if (!av_dict_get(options, "video_size", NULL, 0))
 874                         av_dict_set(&options, "video_size", video_size, 0);
 875
 876                 if (!av_dict_get(options, "framerate", NULL, 0))
 877                         av_dict_set(&options, "framerate", "60", 0);
 878
 879                 if (!av_dict_get(options, "draw_mouse", NULL, 0))
 880                         av_dict_set(&options, "draw_mouse",  "1", 0);
 881
 882                 free(video_size);
 883         }
 884
 885         ret = set_signal_handler(unset_run);
 886         if (ret < 0) {
 887                 perror("sigaction");
 888                 goto out;
 889         }
 890
 891         ret = am7xxx_init(&ctx);
 892         if (ret < 0) {
 893                 perror("am7xxx_init");
 894                 goto out;
 895         }
 896
 897         am7xxx_set_log_level(ctx, log_level);
 898
 899         ret = am7xxx_open_device(ctx, &dev, device_index);
 900         if (ret < 0) {
 901                 perror("am7xxx_open_device");
 902                 goto cleanup;
 903         }
 904
 905         ret = am7xxx_set_zoom_mode(dev, zoom);
 906         if (ret < 0) {
 907                 perror("am7xxx_set_zoom_mode");
 908                 goto cleanup;
 909         }
 910
 911         ret = am7xxx_set_power_mode(dev, power_mode);
 912         if (ret < 0) {
 913                 perror("am7xxx_set_power_mode");
 914                 goto cleanup;
 915         }
 916
 917         /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
 918         if (zoom == AM7XXX_ZOOM_TEST)
 919                 goto cleanup;
 920
 921         ret = am7xxx_play(input_format_string,
 922                           &options,
 923                           input_path,
 924                           rescale_method,
 925                           upscale,
 926                           quality,
 927                           format,
 928                           dev,
 929                           dump_frame);
 930         if (ret < 0) {
 931                 fprintf(stderr, "am7xxx_play failed\n");
 932                 goto cleanup;
 933         }
 934
 935 cleanup:
 936         am7xxx_shutdown(ctx);
 937 out:
 938         av_dict_free(&options);
 939         free(input_path);
 940         free(input_format_string);
 941         return ret;
 942 }