vpx/vp8/encoder/mr_dissim.h

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


#ifndef __INC_MR_DISSIM_H
#define __INC_MR_DISSIM_H
#include "vpx_config.h"

extern void vp8_cal_low_res_mb_cols(VP8_COMP *cpi);
extern void vp8_cal_dissimilarity(VP8_COMP *cpi);
extern void vp8_store_drop_frame_info(VP8_COMP *cpi);

#endif
Multiple-resolution encoder The example encoder down-samples the input video frames a number of times with a down-sampling factor, and then encodes and outputs bitstreams with different resolutions. Support arbitrary down-sampling factor, and down-sampling factor can be different for each encoding level. For example, the encoder can be tested as follows. 1. Configure with multi-resolution encoding enabled: ../libvpx/configure --target=x86-linux-gcc --disable-codecs --enable-vp8 --enable-runtime_cpu_detect --enable-debug --disable-install-docs --enable-error-concealment --enable-multi-res-encoding 2. Run make 3. Encode: If input video is 1280x720, run: ./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1 (output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180). The last parameter is set to 1/0 to show/not show PSNR.) 4. Decode: ./simple_decoder 1.ivf 1.yuv ./simple_decoder 2.ivf 2.yuv ./simple_decoder 3.ivf 3.yuv 5. View video: mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30 mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30 mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30 The encoding parameters can be modified in vp8_multi_resolution_encoder.c, for example, target bitrate, frame rate... Modified API. John helped a lot with that. Thanks! Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5 2011-10-25 21:14:16 +02:00			`/*`
			`* Copyright (c) 2010 The WebM project authors. All Rights Reserved.`
			`*`
			`* Use of this source code is governed by a BSD-style license`
			`* that can be found in the LICENSE file in the root of the source`
			`* tree. An additional intellectual property rights grant can be found`
			`* in the file PATENTS. All contributing project authors may`
			`* be found in the AUTHORS file in the root of the source tree.`
			`*/`


			`#ifndef __INC_MR_DISSIM_H`
			`#define __INC_MR_DISSIM_H`
			`#include "vpx_config.h"`

			`extern void vp8_cal_low_res_mb_cols(VP8_COMP *cpi);`
			`extern void vp8_cal_dissimilarity(VP8_COMP *cpi);`
multi-res: add drop_frame support Added drop_frame support in multi-resolution encoder. If one frame is dropped at a lower-resolution level, the next upper-resolution level encoder needs to encode that frame independently without any lower-resolution level motion information. Another issue is that if one frame is dropped at some but not all resolution levels, a frame after that one may use different set of reference frames at different resolution levels. This reference frame asynchronization could degrade motion search precision in upper-resolution level encoding, which uses lower-resolution level motion result. This change compares the lower-resolution and upper- resolution level's reference frames. If they are not the same, the upper-resolution level encoder can not use lower-resolution level motion result. Change-Id: I61afa4f313630e75b7cbdd5742e230e8724a988a 2012-06-08 17:17:50 +02:00			`extern void vp8_store_drop_frame_info(VP8_COMP *cpi);`
Multiple-resolution encoder The example encoder down-samples the input video frames a number of times with a down-sampling factor, and then encodes and outputs bitstreams with different resolutions. Support arbitrary down-sampling factor, and down-sampling factor can be different for each encoding level. For example, the encoder can be tested as follows. 1. Configure with multi-resolution encoding enabled: ../libvpx/configure --target=x86-linux-gcc --disable-codecs --enable-vp8 --enable-runtime_cpu_detect --enable-debug --disable-install-docs --enable-error-concealment --enable-multi-res-encoding 2. Run make 3. Encode: If input video is 1280x720, run: ./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1 (output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180). The last parameter is set to 1/0 to show/not show PSNR.) 4. Decode: ./simple_decoder 1.ivf 1.yuv ./simple_decoder 2.ivf 2.yuv ./simple_decoder 3.ivf 3.yuv 5. View video: mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30 mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30 mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30 The encoding parameters can be modified in vp8_multi_resolution_encoder.c, for example, target bitrate, frame rate... Modified API. John helped a lot with that. Thanks! Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5 2011-10-25 21:14:16 +02:00
			`#endif`