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 #define VPX_CODEC_DISABLE_COMPAT 1 47 48 #include "vpx/vp8dx.h" 49 #include "vpx/vpx_decoder.h" 50 51 #include "./tools_common.h" 52 #include "./video_reader.h" 53 #include "./vpx_config.h" 54 55 static const char *exec_name; 56 57 void usage_exit() { 58 fprintf(stderr, "Usage: %s <infile> <outfile>\n", exec_name); 59 exit(EXIT_FAILURE); 60 } 61 62 int main(int argc, char **argv) { 63 int frame_cnt = 0; 64 FILE *outfile = NULL; 65 vpx_codec_ctx_t codec; 66 vpx_codec_err_t res; 67 VpxVideoReader *reader = NULL; 68 const VpxInterface *decoder = NULL; 69 const VpxVideoInfo *info = NULL; 70 71 exec_name = argv[0]; 72 73 if (argc != 3) 74 die("Invalid number of arguments."); 75 76 reader = vpx_video_reader_open(argv[1]); 77 if (!reader) 78 die("Failed to open %s for reading.", argv[1]); 79 80 if (!(outfile = fopen(argv[2], "wb"))) 81 die("Failed to open %s for writing", argv[2]); 82 83 info = vpx_video_reader_get_info(reader); 84 85 decoder = get_vpx_decoder_by_fourcc(info->codec_fourcc); 86 if (!decoder) 87 die("Unknown input codec."); 88 89 printf("Using %s\n", vpx_codec_iface_name(decoder->interface())); 90 91 res = vpx_codec_dec_init(&codec, decoder->interface(), NULL, 92 VPX_CODEC_USE_POSTPROC); 93 if (res == VPX_CODEC_INCAPABLE) 94 die_codec(&codec, "Postproc not supported by this decoder."); 95 96 if (res) 97 die_codec(&codec, "Failed to initialize decoder."); 98 99 while (vpx_video_reader_read_frame(reader)) { 100 vpx_codec_iter_t iter = NULL; 101 vpx_image_t *img = NULL; 102 size_t frame_size = 0; 103 const unsigned char *frame = vpx_video_reader_get_frame(reader, 104 &frame_size); 105 106 ++frame_cnt; 107 108 if (frame_cnt % 30 == 1) { 109 vp8_postproc_cfg_t pp = {0, 0, 0}; 110 111 if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) 112 die_codec(&codec, "Failed to turn off postproc."); 113 } else if (frame_cnt % 30 == 16) { 114 vp8_postproc_cfg_t pp = {VP8_DEBLOCK | VP8_DEMACROBLOCK | VP8_MFQE, 115 4, 0}; 116 if (vpx_codec_control(&codec, VP8_SET_POSTPROC, &pp)) 117 die_codec(&codec, "Failed to turn on postproc."); 118 }; 119 120 // Decode the frame with 15ms deadline 121 if (vpx_codec_decode(&codec, frame, (unsigned int)frame_size, NULL, 15000)) 122 die_codec(&codec, "Failed to decode frame"); 123 124 while ((img = vpx_codec_get_frame(&codec, &iter)) != NULL) { 125 vpx_img_write(img, outfile); 126 } 127 } 128 129 printf("Processed %d frames.\n", frame_cnt); 130 if (vpx_codec_destroy(&codec)) 131 die_codec(&codec, "Failed to destroy codec"); 132 133 printf("Play: ffplay -f rawvideo -pix_fmt yuv420p -s %dx%d %s\n", 134 info->frame_width, info->frame_height, argv[2]); 135 136 vpx_video_reader_close(reader); 137 138 fclose(outfile); 139 return EXIT_SUCCESS; 140 } 141
