1/* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11// Postprocessing Decoder 12// ====================== 13// 14// This example adds postprocessing to the simple decoder loop. 15// 16// Initializing Postprocessing 17// --------------------------- 18// You must inform the codec that you might request postprocessing at 19// initialization time. This is done by passing the VPX_CODEC_USE_POSTPROC 20// flag to `vpx_codec_dec_init`. If the codec does not support 21// postprocessing, this call will return VPX_CODEC_INCAPABLE. For 22// demonstration purposes, we also fall back to default initialization if 23// the codec does not provide support. 24// 25// Using Adaptive Postprocessing 26// ----------------------------- 27// VP6 provides "adaptive postprocessing." It will automatically select the 28// best postprocessing filter on a frame by frame basis based on the amount 29// of time remaining before the user's specified deadline expires. The 30// special value 0 indicates that the codec should take as long as 31// necessary to provide the best quality frame. This example gives the 32// codec 15ms (15000us) to return a frame. Remember that this is a soft 33// deadline, and the codec may exceed it doing its regular processing. In 34// these cases, no additional postprocessing will be done. 35// 36// Codec Specific Postprocessing Controls 37// -------------------------------------- 38// Some codecs provide fine grained controls over their built-in 39// postprocessors. VP8 is one example. The following sample code toggles 40// postprocessing on and off every 15 frames. 41 42#include <stdio.h> 43#include <stdlib.h> 44#include <string.h> 45 46#include "vpx/vp8dx.h" 47#include "vpx/vpx_decoder.h" 48 49#include "./tools_common.h" 50#include "./video_reader.h" 51#include "./vpx_config.h" 52 53static const char *exec_name; 54 55void usage_exit() { 56 fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name); 57 exit(EXIT_FAILURE); 58} 59 60int main(int argc, char **argv) { 61 int frame_cnt = 0; 62 FILE *outfile = NULL; 63 vpx_codec_ctx_t codec; 64 vpx_codec_err_t res; 65 VpxVideoReader *reader = NULL; 66 const VpxInterface *decoder = NULL; 67 const VpxVideoInfo *info = NULL; 68 69 exec_name = argv[0]; 70 71 if (argc != 3) 72 die("Invalid number of arguments."); 73 74 reader = vpx_video_reader_open(argv[1]); 75 if (!reader) 76 die("Failed to open %s for reading.", argv[1]); 77 78 if (!(outfile = fopen(argv[2], "wb"))) 79 die("Failed to open %s for writing", argv[2]); 80 81 info = vpx_video_reader_get_info(reader); 82 83 decoder = get_vpx_decoder_by_fourcc(info->codec_fourcc); 84 if (!decoder) 85 die("Unknown input codec."); 86 87 printf("Using %s\n", vpx_codec_iface_name(decoder->codec_interface())); 88 89 res = vpx_codec_dec_init(&codec, decoder->codec_interface(), NULL, 90 VPX_CODEC_USE_POSTPROC); 91 if (res == VPX_CODEC_INCAPABLE) 92 die_codec(&codec, "Postproc not supported by this decoder."); 93 94 if (res) 95 die_codec(&codec, "Failed to initialize decoder."); 96 97 while (vpx_video_reader_read_frame(reader)) { 98 vpx_codec_iter_t iter = NULL; 99 vpx_image_t *img = NULL; 100 size_t frame_size = 0; 101 const unsigned char *frame = vpx_video_reader_get_frame(reader, 102 &frame_size); 103 104 ++frame_cnt; 105 106 if (frame_cnt % 30 == 1) { 107 vp8_postproc_cfg_t pp = {0, 0, 0}; 108 109 if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) 110 die_codec(&codec, "Failed to turn off postproc."); 111 } else if (frame_cnt % 30 == 16) { 112 vp8_postproc_cfg_t pp = {VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE, 113 4, 0}; 114 if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) 115 die_codec(&codec, "Failed to turn on postproc."); 116 }; 117 118 // Decode the frame with 15ms deadline 119 if (vpx_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 15000)) 120 die_codec(&codec, "Failed to decode frame"); 121 122 while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) { 123 vpx_img_write(img, outfile); 124 } 125 } 126 127 printf("Processed %d frames.\n", frame_cnt); 128 if (vpx_codec_destroy(&codec)) 129 die_codec(&codec, "Failed to destroy codec"); 130 131 printf("Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n", 132 info->frame_width, info->frame_height, argv[2]); 133 134 vpx_video_reader_close(reader); 135 136 fclose(outfile); 137 return EXIT_SUCCESS; 138} 139