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lossless_encoder.c (4385B)

      1 /*
      2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
      3 *
      4 * This source code is subject to the terms of the BSD 2 Clause License and
      5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
      6 * was not distributed with this source code in the LICENSE file, you can
      7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
      8 * Media Patent License 1.0 was not distributed with this source code in the
      9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
     10 */
     11 
     12 #include <stdio.h>
     13 #include <stdlib.h>
     14 #include <string.h>
     15 
     16 #include "aom/aom_encoder.h"
     17 #include "aom/aomcx.h"
     18 #include "common/tools_common.h"
     19 #include "common/video_writer.h"
     20 
     21 static const char *exec_name;
     22 
     23 void usage_exit(void) {
     24  fprintf(stderr,
     25          "lossless_encoder: Example demonstrating lossless "
     26          "encoding feature. Supports raw input only.\n");
     27  fprintf(stderr, "Usage: %s <width> <height> <infile> <outfile>\n", exec_name);
     28  exit(EXIT_FAILURE);
     29 }
     30 
     31 static int encode_frame(aom_codec_ctx_t *codec, aom_image_t *img,
     32                        int frame_index, int flags, AvxVideoWriter *writer) {
     33  int got_pkts = 0;
     34  aom_codec_iter_t iter = NULL;
     35  const aom_codec_cx_pkt_t *pkt = NULL;
     36  const aom_codec_err_t res =
     37      aom_codec_encode(codec, img, frame_index, 1, flags);
     38  if (res != AOM_CODEC_OK) die_codec(codec, "Failed to encode frame");
     39 
     40  while ((pkt = aom_codec_get_cx_data(codec, &iter)) != NULL) {
     41    got_pkts = 1;
     42 
     43    if (pkt->kind == AOM_CODEC_CX_FRAME_PKT) {
     44      const int keyframe = (pkt->data.frame.flags & AOM_FRAME_IS_KEY) != 0;
     45      if (!aom_video_writer_write_frame(writer, pkt->data.frame.buf,
     46                                        pkt->data.frame.sz,
     47                                        pkt->data.frame.pts)) {
     48        die_codec(codec, "Failed to write compressed frame");
     49      }
     50      printf(keyframe ? "K" : ".");
     51      fflush(stdout);
     52    }
     53  }
     54 
     55  return got_pkts;
     56 }
     57 
     58 int main(int argc, char **argv) {
     59  FILE *infile = NULL;
     60  aom_codec_enc_cfg_t cfg;
     61  int frame_count = 0;
     62  aom_image_t raw;
     63  aom_codec_err_t res;
     64  AvxVideoInfo info;
     65  AvxVideoWriter *writer = NULL;
     66  const int fps = 30;
     67 
     68  exec_name = argv[0];
     69 
     70  // Clear explicitly, as simply assigning "{ 0 }" generates
     71  // "missing-field-initializers" warning in some compilers.
     72  memset(&info, 0, sizeof(info));
     73 
     74  if (argc < 5) die("Invalid number of arguments");
     75 
     76  aom_codec_iface_t *encoder = get_aom_encoder_by_short_name("av1");
     77  if (!encoder) die("Unsupported codec.");
     78 
     79  info.codec_fourcc = get_fourcc_by_aom_encoder(encoder);
     80  info.frame_width = (int)strtol(argv[1], NULL, 0);
     81  info.frame_height = (int)strtol(argv[2], NULL, 0);
     82  info.time_base.numerator = 1;
     83  info.time_base.denominator = fps;
     84 
     85  if (info.frame_width <= 0 || info.frame_height <= 0 ||
     86      (info.frame_width % 2) != 0 || (info.frame_height % 2) != 0) {
     87    die("Invalid frame size: %dx%d", info.frame_width, info.frame_height);
     88  }
     89 
     90  if (!aom_img_alloc(&raw, AOM_IMG_FMT_I420, info.frame_width,
     91                     info.frame_height, 1)) {
     92    die("Failed to allocate image.");
     93  }
     94 
     95  printf("Using %s\n", aom_codec_iface_name(encoder));
     96 
     97  aom_codec_ctx_t codec;
     98  res = aom_codec_enc_config_default(encoder, &cfg, 0);
     99  if (res) die_codec(&codec, "Failed to get default codec config.");
    100 
    101  cfg.g_w = info.frame_width;
    102  cfg.g_h = info.frame_height;
    103  cfg.g_timebase.num = info.time_base.numerator;
    104  cfg.g_timebase.den = info.time_base.denominator;
    105 
    106  writer = aom_video_writer_open(argv[4], kContainerIVF, &info);
    107  if (!writer) die("Failed to open %s for writing.", argv[4]);
    108 
    109  if (!(infile = fopen(argv[3], "rb")))
    110    die("Failed to open %s for reading.", argv[3]);
    111 
    112  if (aom_codec_enc_init(&codec, encoder, &cfg, 0))
    113    die("Failed to initialize encoder");
    114 
    115  if (AOM_CODEC_CONTROL_TYPECHECKED(&codec, AV1E_SET_LOSSLESS, 1))
    116    die_codec(&codec, "Failed to use lossless mode");
    117 
    118  // Encode frames.
    119  while (aom_img_read(&raw, infile)) {
    120    encode_frame(&codec, &raw, frame_count++, 0, writer);
    121  }
    122 
    123  // Flush encoder.
    124  while (encode_frame(&codec, NULL, -1, 0, writer)) {
    125  }
    126 
    127  printf("\n");
    128  fclose(infile);
    129  printf("Processed %d frames.\n", frame_count);
    130 
    131  aom_img_free(&raw);
    132  if (aom_codec_destroy(&codec)) die_codec(&codec, "Failed to destroy codec.");
    133 
    134  aom_video_writer_close(writer);
    135 
    136  return EXIT_SUCCESS;
    137 }