Add Cinepak encoder
With permission of Tomas Härdin applied by Rl aetey.se Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Tomas Härdin
Diego Biurrun
parent
4d330da006
commit
89e632de9b
@ -16,6 +16,7 @@ version <next>:
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- FM Screen Capture Codec decoder
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- ClearVideo decoder (I-frames only)
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- support for decoding through D3D11VA in avconv
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- Cinepak encoder
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version 12:
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@ -631,7 +631,7 @@ following image formats are supported:
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@tab Codec used in Delphine Software International games.
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@item Discworld II BMV Video @tab @tab X
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@item Canopus Lossless Codec @tab @tab X
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@item Cinepak @tab @tab X
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@item Cinepak @tab X @tab X
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@item Cirrus Logic AccuPak @tab X @tab X
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@tab fourcc: CLJR
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@item Creative YUV (CYUV) @tab @tab X
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@ -186,6 +186,7 @@ OBJS-$(CONFIG_CDGRAPHICS_DECODER) += cdgraphics.o
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OBJS-$(CONFIG_CDXL_DECODER) += cdxl.o
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OBJS-$(CONFIG_CFHD_DECODER) += cfhd.o cfhddata.o
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OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
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OBJS-$(CONFIG_CINEPAK_ENCODER) += cinepakenc.o
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OBJS-$(CONFIG_CLEARVIDEO_DECODER) += clearvideo.o
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OBJS-$(CONFIG_CLJR_DECODER) += cljrdec.o
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OBJS-$(CONFIG_CLJR_ENCODER) += cljrenc.o
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@ -133,7 +133,7 @@ void avcodec_register_all(void)
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REGISTER_DECODER(CDGRAPHICS, cdgraphics);
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REGISTER_DECODER(CDXL, cdxl);
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REGISTER_DECODER(CFHD, cfhd);
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REGISTER_DECODER(CINEPAK, cinepak);
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REGISTER_ENCDEC (CINEPAK, cinepak);
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REGISTER_DECODER(CLEARVIDEO, clearvideo);
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REGISTER_ENCDEC (CLJR, cljr);
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REGISTER_DECODER(CLLC, cllc);
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822
libavcodec/cinepakenc.c
Normal file
822
libavcodec/cinepakenc.c
Normal file
@ -0,0 +1,822 @@
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/*
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* Cinepak encoder (c) 2011 Tomas Härdin
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* http://titan.codemill.se/~tomhar/cinepakenc.patch
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "libavutil/lfg.h"
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#include "elbg.h"
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#define CVID_HEADER_SIZE 10
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#define STRIP_HEADER_SIZE 12
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#define CHUNK_HEADER_SIZE 4
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#define MB_SIZE 4 //4x4 MBs
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#define MB_AREA (MB_SIZE*MB_SIZE)
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#define VECTOR_MAX 6 //six or four entries per vector depending on format
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#define CODEBOOK_MAX 256
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#define CODEBOOK_NUM 5 //five potential codebooks (1, 4, 16, 64, 256) for V1 and V4
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#define MAX_STRIPS 1 //Note: having fewer choices regarding the number of strip speeds up encoding (obviously)
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#define MIN_STRIPS 1 //Note: having more strips speeds up encoding the frame (this is less obvious)
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typedef enum {
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MODE_V1_ONLY = 0,
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MODE_V1_V4,
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MODE_MC,
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MODE_COUNT,
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} CinepakMode;
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typedef enum {
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ENC_V1,
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ENC_V4,
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ENC_SKIP
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} mb_encoding;
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typedef struct {
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int v1_vector; //index into v1 codebook
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int v1_error; //error when using V1 encoding
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int v4_vector[CODEBOOK_NUM][4]; //indices into v4 codebooks
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int v4_error[CODEBOOK_NUM]; //error when using V4 encodings
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int skip_error; //error when block is skipped (aka copied from last frame)
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mb_encoding best_encoding; //last result from calculate_mode_score()
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} mb_info;
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typedef struct {
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int v1_codebook[CODEBOOK_MAX*VECTOR_MAX];
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int *v4_codebook;
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} strip_info;
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typedef struct {
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AVCodecContext *avctx;
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unsigned char *pict_bufs[3], *strip_buf, *frame_buf;
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AVFrame last_frame;
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AVFrame best_frame;
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AVFrame scratch_frame;
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enum AVPixelFormat pix_fmt;
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int w, h;
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int curframe, keyint;
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AVLFG randctx;
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uint64_t lambda;
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int *codebook_input;
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int *codebook_closest;
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mb_info *mb; //MB RD state
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#ifdef CINEPAKENC_DEBUG
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mb_info *best_mb; //TODO: remove. only used for printing stats
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#endif
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int num_v1_mode, num_v4_mode, num_mc_mode;
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int num_v1_encs, num_v4_encs, num_skips;
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} CinepakEncContext;
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static av_cold int cinepak_encode_init(AVCodecContext *avctx)
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{
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CinepakEncContext *s = avctx->priv_data;
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int x, mb_count, strip_buf_size, frame_buf_size;
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if (avctx->width & 3 || avctx->height & 3) {
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av_log(avctx, AV_LOG_ERROR, "width and height must be multiples of four (got %ix%i)\n",
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avctx->width, avctx->height);
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return AVERROR(EINVAL);
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}
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if (!(s->codebook_input = av_malloc(sizeof(int) * (avctx->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4) * (avctx->width * avctx->height) >> 2)))
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return AVERROR(ENOMEM);
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if (!(s->codebook_closest = av_malloc(sizeof(int) * (avctx->width * avctx->height) >> 2)))
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goto enomem;
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for(x = 0; x < 3; x++)
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if(!(s->pict_bufs[x] = av_malloc((avctx->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4) * (avctx->width * avctx->height) >> 2)))
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goto enomem;
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mb_count = avctx->width * avctx->height / MB_AREA;
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//the largest possible chunk is 0x31 with all MBs encoded in V4 mode, which is 34 bits per MB
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strip_buf_size = STRIP_HEADER_SIZE + 3 * CHUNK_HEADER_SIZE + 2 * VECTOR_MAX * CODEBOOK_MAX + 4 * (mb_count + (mb_count + 15) / 16);
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frame_buf_size = CVID_HEADER_SIZE + MAX_STRIPS * strip_buf_size;
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if (!(s->strip_buf = av_malloc(strip_buf_size)))
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goto enomem;
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if (!(s->frame_buf = av_malloc(frame_buf_size)))
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goto enomem;
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if (!(s->mb = av_malloc(mb_count*sizeof(mb_info))))
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goto enomem;
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#ifdef CINEPAKENC_DEBUG
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if (!(s->best_mb = av_malloc(mb_count*sizeof(mb_info))))
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goto enomem;
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#endif
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av_lfg_init(&s->randctx, 1);
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s->avctx = avctx;
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s->w = avctx->width;
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s->h = avctx->height;
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s->curframe = 0;
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s->keyint = avctx->keyint_min;
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s->pix_fmt = avctx->pix_fmt;
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//set up AVFrames
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s->last_frame.data[0] = s->pict_bufs[0];
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s->last_frame.linesize[0] = s->w;
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s->best_frame.data[0] = s->pict_bufs[1];
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s->best_frame.linesize[0] = s->w;
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s->scratch_frame.data[0] = s->pict_bufs[2];
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s->scratch_frame.linesize[0] = s->w;
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if(s->pix_fmt == AV_PIX_FMT_YUV420P) {
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s->last_frame.data[1] = s->last_frame.data[0] + s->w * s->h;
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s->last_frame.data[2] = s->last_frame.data[1] + ((s->w * s->h) >> 2);
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s->last_frame.linesize[1] = s->last_frame.linesize[2] = s->w >> 1;
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s->best_frame.data[1] = s->best_frame.data[0] + s->w * s->h;
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s->best_frame.data[2] = s->best_frame.data[1] + ((s->w * s->h) >> 2);
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s->best_frame.linesize[1] = s->best_frame.linesize[2] = s->w >> 1;
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s->scratch_frame.data[1] = s->scratch_frame.data[0] + s->w * s->h;
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s->scratch_frame.data[2] = s->scratch_frame.data[1] + ((s->w * s->h) >> 2);
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s->scratch_frame.linesize[1] = s->scratch_frame.linesize[2] = s->w >> 1;
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}
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s->num_v1_mode = s->num_v4_mode = s->num_mc_mode = s->num_v1_encs = s->num_v4_encs = s->num_skips = 0;
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return 0;
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enomem:
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av_free(s->codebook_input);
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av_free(s->codebook_closest);
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av_free(s->strip_buf);
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av_free(s->frame_buf);
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av_free(s->mb);
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#ifdef CINEPAKENC_DEBUG
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av_free(s->best_mb);
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#endif
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for(x = 0; x < 3; x++)
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av_free(s->pict_bufs[x]);
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return AVERROR(ENOMEM);
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}
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static int64_t calculate_mode_score(CinepakEncContext *s, CinepakMode mode, int h, int v1_size, int v4_size, int v4, strip_info *info)
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{
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//score = FF_LAMBDA_SCALE * error + lambda * bits
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int x;
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int entry_size = s->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4;
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int mb_count = s->w * h / MB_AREA;
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mb_info *mb;
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int64_t score1, score2, score3;
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int64_t ret = s->lambda * ((v1_size ? CHUNK_HEADER_SIZE + v1_size * entry_size : 0) +
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(v4_size ? CHUNK_HEADER_SIZE + v4_size * entry_size : 0) +
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CHUNK_HEADER_SIZE) << 3;
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//av_log(s->avctx, AV_LOG_INFO, "sizes %3i %3i -> %9li score mb_count %i", v1_size, v4_size, ret, mb_count);
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switch(mode) {
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case MODE_V1_ONLY:
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//one byte per MB
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ret += s->lambda * 8 * mb_count;
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for(x = 0; x < mb_count; x++) {
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mb = &s->mb[x];
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ret += FF_LAMBDA_SCALE * mb->v1_error;
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mb->best_encoding = ENC_V1;
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}
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break;
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case MODE_V1_V4:
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//9 or 33 bits per MB
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for(x = 0; x < mb_count; x++) {
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mb = &s->mb[x];
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score1 = s->lambda * 9 + FF_LAMBDA_SCALE * mb->v1_error;
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score2 = s->lambda * 33 + FF_LAMBDA_SCALE * mb->v4_error[v4];
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if(score1 <= score2) {
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ret += score1;
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mb->best_encoding = ENC_V1;
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} else {
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ret += score2;
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mb->best_encoding = ENC_V4;
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}
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}
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break;
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case MODE_MC:
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//1, 10 or 34 bits per MB
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for(x = 0; x < mb_count; x++) {
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mb = &s->mb[x];
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score1 = s->lambda * 1 + FF_LAMBDA_SCALE * mb->skip_error;
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score2 = s->lambda * 10 + FF_LAMBDA_SCALE * mb->v1_error;
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score3 = s->lambda * 34 + FF_LAMBDA_SCALE * mb->v4_error[v4];
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if(score1 <= score2 && score1 <= score3) {
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ret += score1;
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mb->best_encoding = ENC_SKIP;
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} else if(score2 <= score1 && score2 <= score3) {
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ret += score2;
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mb->best_encoding = ENC_V1;
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} else {
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ret += score3;
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mb->best_encoding = ENC_V4;
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}
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}
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break;
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}
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return ret;
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}
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static int write_chunk_header(unsigned char *buf, int chunk_type, int chunk_size)
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{
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buf[0] = chunk_type;
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AV_WB24(&buf[1], chunk_size + CHUNK_HEADER_SIZE);
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return CHUNK_HEADER_SIZE;
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}
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static int encode_codebook(CinepakEncContext *s, int *codebook, int size, int chunk_type_yuv, int chunk_type_gray, unsigned char *buf)
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{
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int x, y, ret, entry_size = s->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4;
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ret = write_chunk_header(buf, s->pix_fmt == AV_PIX_FMT_YUV420P ? chunk_type_yuv : chunk_type_gray, entry_size * size);
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for(x = 0; x < size; x++)
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for(y = 0; y < entry_size; y++)
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buf[ret++] = codebook[y + x*entry_size] ^ (y >= 4 ? 0x80 : 0);
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return ret;
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}
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//sets out to the sub picture starting at (x,y) in in
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static void get_sub_picture(CinepakEncContext *s, int x, int y, AVPicture *in, AVPicture *out)
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{
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out->data[0] = in->data[0] + x + y * in->linesize[0];
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out->linesize[0] = in->linesize[0];
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if(s->pix_fmt == AV_PIX_FMT_YUV420P) {
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out->data[1] = in->data[1] + (x >> 1) + (y >> 1) * in->linesize[1];
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out->linesize[1] = in->linesize[1];
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out->data[2] = in->data[2] + (x >> 1) + (y >> 1) * in->linesize[2];
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out->linesize[2] = in->linesize[2];
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}
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}
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//decodes the V1 vector in mb into the 4x4 MB pointed to by sub_pict
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static void decode_v1_vector(CinepakEncContext *s, AVPicture *sub_pict, mb_info *mb, strip_info *info)
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{
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int entry_size = s->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4;
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sub_pict->data[0][0] =
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sub_pict->data[0][1] =
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sub_pict->data[0][ sub_pict->linesize[0]] =
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sub_pict->data[0][1+ sub_pict->linesize[0]] = info->v1_codebook[mb->v1_vector*entry_size];
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sub_pict->data[0][2] =
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sub_pict->data[0][3] =
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sub_pict->data[0][2+ sub_pict->linesize[0]] =
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sub_pict->data[0][3+ sub_pict->linesize[0]] = info->v1_codebook[mb->v1_vector*entry_size+1];
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sub_pict->data[0][2*sub_pict->linesize[0]] =
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sub_pict->data[0][1+2*sub_pict->linesize[0]] =
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sub_pict->data[0][ 3*sub_pict->linesize[0]] =
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sub_pict->data[0][1+3*sub_pict->linesize[0]] = info->v1_codebook[mb->v1_vector*entry_size+2];
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sub_pict->data[0][2+2*sub_pict->linesize[0]] =
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sub_pict->data[0][3+2*sub_pict->linesize[0]] =
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sub_pict->data[0][2+3*sub_pict->linesize[0]] =
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sub_pict->data[0][3+3*sub_pict->linesize[0]] = info->v1_codebook[mb->v1_vector*entry_size+3];
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if(s->pix_fmt == AV_PIX_FMT_YUV420P) {
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sub_pict->data[1][0] =
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sub_pict->data[1][1] =
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sub_pict->data[1][ sub_pict->linesize[1]] =
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sub_pict->data[1][1+ sub_pict->linesize[1]] = info->v1_codebook[mb->v1_vector*entry_size+4];
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sub_pict->data[2][0] =
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sub_pict->data[2][1] =
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sub_pict->data[2][ sub_pict->linesize[2]] =
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sub_pict->data[2][1+ sub_pict->linesize[2]] = info->v1_codebook[mb->v1_vector*entry_size+5];
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}
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}
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//decodes the V4 vectors in mb into the 4x4 MB pointed to by sub_pict
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static void decode_v4_vector(CinepakEncContext *s, AVPicture *sub_pict, int *v4_vector, strip_info *info)
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{
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int i, x, y, entry_size = s->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4;
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for(i = y = 0; y < 4; y += 2) {
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for(x = 0; x < 4; x += 2, i++) {
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sub_pict->data[0][x + y*sub_pict->linesize[0]] = info->v4_codebook[v4_vector[i]*entry_size];
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sub_pict->data[0][x+1 + y*sub_pict->linesize[0]] = info->v4_codebook[v4_vector[i]*entry_size+1];
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sub_pict->data[0][x + (y+1)*sub_pict->linesize[0]] = info->v4_codebook[v4_vector[i]*entry_size+2];
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sub_pict->data[0][x+1 + (y+1)*sub_pict->linesize[0]] = info->v4_codebook[v4_vector[i]*entry_size+3];
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if(s->pix_fmt == AV_PIX_FMT_YUV420P) {
|
||||
sub_pict->data[1][(x>>1) + (y>>1)*sub_pict->linesize[1]] = info->v4_codebook[v4_vector[i]*entry_size+4];
|
||||
sub_pict->data[2][(x>>1) + (y>>1)*sub_pict->linesize[2]] = info->v4_codebook[v4_vector[i]*entry_size+5];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int encode_mode(CinepakEncContext *s, CinepakMode mode, int h, int v1_size, int v4_size, int v4, AVPicture *scratch_pict, strip_info *info, unsigned char *buf)
|
||||
{
|
||||
int x, y, z, flags, bits, temp_size, header_ofs, ret = 0, mb_count = s->w * h / MB_AREA;
|
||||
int needs_extra_bit, should_write_temp;
|
||||
unsigned char temp[64]; //32/2 = 16 V4 blocks at 4 B each -> 64 B
|
||||
mb_info *mb;
|
||||
AVPicture sub_scratch;
|
||||
|
||||
//encode codebooks
|
||||
if(v1_size)
|
||||
ret += encode_codebook(s, info->v1_codebook, v1_size, 0x22, 0x26, buf + ret);
|
||||
|
||||
if(v4_size)
|
||||
ret += encode_codebook(s, info->v4_codebook, v4_size, 0x20, 0x24, buf + ret);
|
||||
|
||||
//update scratch picture
|
||||
for(z = y = 0; y < h; y += MB_SIZE) {
|
||||
for(x = 0; x < s->w; x += MB_SIZE, z++) {
|
||||
mb = &s->mb[z];
|
||||
|
||||
if(mode == MODE_MC && mb->best_encoding == ENC_SKIP)
|
||||
continue;
|
||||
|
||||
get_sub_picture(s, x, y, scratch_pict, &sub_scratch);
|
||||
|
||||
if(mode == MODE_V1_ONLY || mb->best_encoding == ENC_V1)
|
||||
decode_v1_vector(s, &sub_scratch, mb, info);
|
||||
else if(mode != MODE_V1_ONLY && mb->best_encoding == ENC_V4)
|
||||
decode_v4_vector(s, &sub_scratch, mb->v4_vector[v4], info);
|
||||
}
|
||||
}
|
||||
|
||||
switch(mode) {
|
||||
case MODE_V1_ONLY:
|
||||
//av_log(s->avctx, AV_LOG_INFO, "mb_count = %i\n", mb_count);
|
||||
ret += write_chunk_header(buf + ret, 0x32, mb_count);
|
||||
|
||||
for(x = 0; x < mb_count; x++)
|
||||
buf[ret++] = s->mb[x].v1_vector;
|
||||
|
||||
break;
|
||||
case MODE_V1_V4:
|
||||
//remember header position
|
||||
header_ofs = ret;
|
||||
ret += CHUNK_HEADER_SIZE;
|
||||
|
||||
for(x = 0; x < mb_count; x += 32) {
|
||||
flags = 0;
|
||||
for(y = x; y < FFMIN(x+32, mb_count); y++)
|
||||
if(s->mb[y].best_encoding == ENC_V4)
|
||||
flags |= 1 << (31 - y + x);
|
||||
|
||||
AV_WB32(&buf[ret], flags);
|
||||
ret += 4;
|
||||
|
||||
for(y = x; y < FFMIN(x+32, mb_count); y++) {
|
||||
mb = &s->mb[y];
|
||||
|
||||
if(mb->best_encoding == ENC_V1)
|
||||
buf[ret++] = mb->v1_vector;
|
||||
else
|
||||
for(z = 0; z < 4; z++)
|
||||
buf[ret++] = mb->v4_vector[v4][z];
|
||||
}
|
||||
}
|
||||
|
||||
write_chunk_header(buf + header_ofs, 0x30, ret - header_ofs - CHUNK_HEADER_SIZE);
|
||||
|
||||
break;
|
||||
case MODE_MC:
|
||||
//remember header position
|
||||
header_ofs = ret;
|
||||
ret += CHUNK_HEADER_SIZE;
|
||||
flags = bits = temp_size = 0;
|
||||
|
||||
for(x = 0; x < mb_count; x++) {
|
||||
mb = &s->mb[x];
|
||||
flags |= (mb->best_encoding != ENC_SKIP) << (31 - bits++);
|
||||
needs_extra_bit = 0;
|
||||
should_write_temp = 0;
|
||||
|
||||
if(mb->best_encoding != ENC_SKIP) {
|
||||
if(bits < 32)
|
||||
flags |= (mb->best_encoding == ENC_V4) << (31 - bits++);
|
||||
else
|
||||
needs_extra_bit = 1;
|
||||
}
|
||||
|
||||
if(bits == 32) {
|
||||
AV_WB32(&buf[ret], flags);
|
||||
ret += 4;
|
||||
flags = bits = 0;
|
||||
|
||||
if(mb->best_encoding == ENC_SKIP || needs_extra_bit) {
|
||||
memcpy(&buf[ret], temp, temp_size);
|
||||
ret += temp_size;
|
||||
temp_size = 0;
|
||||
} else
|
||||
should_write_temp = 1;
|
||||
}
|
||||
|
||||
if(needs_extra_bit) {
|
||||
flags = (mb->best_encoding == ENC_V4) << 31;
|
||||
bits = 1;
|
||||
}
|
||||
|
||||
if(mb->best_encoding == ENC_V1)
|
||||
temp[temp_size++] = mb->v1_vector;
|
||||
else if(mb->best_encoding == ENC_V4)
|
||||
for(z = 0; z < 4; z++)
|
||||
temp[temp_size++] = mb->v4_vector[v4][z];
|
||||
|
||||
if(should_write_temp) {
|
||||
memcpy(&buf[ret], temp, temp_size);
|
||||
ret += temp_size;
|
||||
temp_size = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if(bits > 0) {
|
||||
AV_WB32(&buf[ret], flags);
|
||||
ret += 4;
|
||||
memcpy(&buf[ret], temp, temp_size);
|
||||
ret += temp_size;
|
||||
}
|
||||
|
||||
write_chunk_header(buf + header_ofs, 0x31, ret - header_ofs - CHUNK_HEADER_SIZE);
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
//computes distortion of 4x4 MB in b compared to a
|
||||
static int compute_mb_distortion(CinepakEncContext *s, AVPicture *a, AVPicture *b)
|
||||
{
|
||||
int x, y, p, d, ret = 0;
|
||||
|
||||
for(y = 0; y < MB_SIZE; y++) {
|
||||
for(x = 0; x < MB_SIZE; x++) {
|
||||
d = a->data[0][x + y*a->linesize[0]] - b->data[0][x + y*b->linesize[0]];
|
||||
ret += d*d;
|
||||
}
|
||||
}
|
||||
|
||||
if(s->pix_fmt == AV_PIX_FMT_YUV420P) {
|
||||
for(p = 1; p <= 2; p++) {
|
||||
for(y = 0; y < MB_SIZE/2; y++) {
|
||||
for(x = 0; x < MB_SIZE/2; x++) {
|
||||
d = a->data[p][x + y*a->linesize[p]] - b->data[p][x + y*b->linesize[p]];
|
||||
ret += d*d;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int quantize(CinepakEncContext *s, int h, AVPicture *pict, int v1mode, int size, int v4, strip_info *info)
|
||||
{
|
||||
int x, y, i, j, k, x2, y2, x3, y3, plane, shift;
|
||||
int entry_size = s->pix_fmt == AV_PIX_FMT_YUV420P ? 6 : 4;
|
||||
int *codebook = v1mode ? info->v1_codebook : info->v4_codebook;
|
||||
int64_t total_error = 0;
|
||||
uint8_t vq_pict_buf[(MB_AREA*3)/2];
|
||||
AVPicture sub_pict, vq_pict;
|
||||
|
||||
for(i = y = 0; y < h; y += MB_SIZE) {
|
||||
for(x = 0; x < s->w; x += MB_SIZE, i += v1mode ? 1 : 4) {
|
||||
int *base = s->codebook_input + i*entry_size;
|
||||
|
||||
if(v1mode) {
|
||||
//subsample
|
||||
for(j = y2 = 0; y2 < entry_size; y2 += 2) {
|
||||
for(x2 = 0; x2 < 4; x2 += 2, j++) {
|
||||
plane = y2 < 4 ? 0 : 1 + (x2 >> 1);
|
||||
shift = y2 < 4 ? 0 : 1;
|
||||
x3 = shift ? 0 : x2;
|
||||
y3 = shift ? 0 : y2;
|
||||
base[j] = (pict->data[plane][((x+x3) >> shift) + ((y+y3) >> shift) * pict->linesize[plane]] +
|
||||
pict->data[plane][((x+x3) >> shift) + 1 + ((y+y3) >> shift) * pict->linesize[plane]] +
|
||||
pict->data[plane][((x+x3) >> shift) + (((y+y3) >> shift) + 1) * pict->linesize[plane]] +
|
||||
pict->data[plane][((x+x3) >> shift) + 1 + (((y+y3) >> shift) + 1) * pict->linesize[plane]]) >> 2;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
//copy
|
||||
for(j = y2 = 0; y2 < MB_SIZE; y2 += 2) {
|
||||
for(x2 = 0; x2 < MB_SIZE; x2 += 2) {
|
||||
for(k = 0; k < entry_size; k++, j++) {
|
||||
plane = k >= 4 ? k - 3 : 0;
|
||||
|
||||
if(k >= 4) {
|
||||
x3 = (x+x2) >> 1;
|
||||
y3 = (y+y2) >> 1;
|
||||
} else {
|
||||
x3 = x + x2 + (k & 1);
|
||||
y3 = y + y2 + (k >> 1);
|
||||
}
|
||||
|
||||
base[j] = pict->data[plane][x3 + y3*pict->linesize[plane]];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
ff_init_elbg(s->codebook_input, entry_size, i, codebook, size, 1, s->codebook_closest, &s->randctx);
|
||||
ff_do_elbg(s->codebook_input, entry_size, i, codebook, size, 1, s->codebook_closest, &s->randctx);
|
||||
|
||||
//setup vq_pict, which contains a single MB
|
||||
vq_pict.data[0] = vq_pict_buf;
|
||||
vq_pict.linesize[0] = MB_SIZE;
|
||||
vq_pict.data[1] = &vq_pict_buf[MB_AREA];
|
||||
vq_pict.data[2] = vq_pict.data[1] + (MB_AREA >> 2);
|
||||
vq_pict.linesize[1] = vq_pict.linesize[2] = MB_SIZE >> 1;
|
||||
|
||||
//copy indices
|
||||
for(i = j = y = 0; y < h; y += MB_SIZE) {
|
||||
for(x = 0; x < s->w; x += MB_SIZE, j++, i += v1mode ? 1 : 4) {
|
||||
mb_info *mb = &s->mb[j];
|
||||
|
||||
//point sub_pict to current MB
|
||||
get_sub_picture(s, x, y, pict, &sub_pict);
|
||||
|
||||
if(v1mode) {
|
||||
mb->v1_vector = s->codebook_closest[i];
|
||||
|
||||
//fill in vq_pict with V1 data
|
||||
decode_v1_vector(s, &vq_pict, mb, info);
|
||||
|
||||
mb->v1_error = compute_mb_distortion(s, &sub_pict, &vq_pict);
|
||||
total_error += mb->v1_error;
|
||||
} else {
|
||||
for(k = 0; k < 4; k++)
|
||||
mb->v4_vector[v4][k] = s->codebook_closest[i+k];
|
||||
|
||||
//fill in vq_pict with V4 data
|
||||
decode_v4_vector(s, &vq_pict, mb->v4_vector[v4], info);
|
||||
|
||||
mb->v4_error[v4] = compute_mb_distortion(s, &sub_pict, &vq_pict);
|
||||
total_error += mb->v4_error[v4];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//av_log(s->avctx, AV_LOG_INFO, "mode %i size %i i %i error %li\n", v1mode, size, i, total_error);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void calculate_skip_errors(CinepakEncContext *s, int h, AVPicture *last_pict, AVPicture *pict, strip_info *info)
|
||||
{
|
||||
int x, y, i;
|
||||
AVPicture sub_last, sub_pict;
|
||||
|
||||
for(i = y = 0; y < h; y += MB_SIZE) {
|
||||
for(x = 0; x < s->w; x += MB_SIZE, i++) {
|
||||
get_sub_picture(s, x, y, last_pict, &sub_last);
|
||||
get_sub_picture(s, x, y, pict, &sub_pict);
|
||||
|
||||
s->mb[i].skip_error = compute_mb_distortion(s, &sub_last, &sub_pict);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void write_strip_header(CinepakEncContext *s, int y, int h, int keyframe, unsigned char *buf, int strip_size)
|
||||
{
|
||||
buf[0] = keyframe ? 0x11: 0x10;
|
||||
AV_WB24(&buf[1], strip_size + STRIP_HEADER_SIZE);
|
||||
AV_WB16(&buf[4], y);
|
||||
AV_WB16(&buf[6], 0);
|
||||
AV_WB16(&buf[8], h);
|
||||
AV_WB16(&buf[10], s->w);
|
||||
}
|
||||
|
||||
static int rd_strip(CinepakEncContext *s, int y, int h, int keyframe, AVPicture *last_pict, AVPicture *pict, AVPicture *scratch_pict, unsigned char *buf, int64_t *best_score)
|
||||
{
|
||||
int64_t score = 0;
|
||||
int best_size = 0, v1_size, v4_size, v4, mb_count = s->w * h / MB_AREA;
|
||||
strip_info info;
|
||||
CinepakMode best_mode;
|
||||
int v4_codebooks[CODEBOOK_NUM][CODEBOOK_MAX*VECTOR_MAX];
|
||||
|
||||
if(!keyframe)
|
||||
calculate_skip_errors(s, h, last_pict, pict, &info);
|
||||
|
||||
//precompute V4 codebooks
|
||||
for(v4_size = 1, v4 = 0; v4_size <= 256; v4_size <<= 2, v4++) {
|
||||
info.v4_codebook = v4_codebooks[v4];
|
||||
quantize(s, h, pict, 0, v4_size, v4, &info);
|
||||
}
|
||||
|
||||
//try all powers of 4 for the size of the codebooks
|
||||
//constraint the v4 codebook to be no bigger than the v1 codebook
|
||||
for(v1_size = 1; v1_size <= 256; v1_size <<= 2) {
|
||||
//compute V1 codebook
|
||||
quantize(s, h, pict, 1, v1_size, -1, &info);
|
||||
|
||||
for(v4_size = 0, v4 = -1; v4_size <= v1_size; v4_size = v4_size ? v4_size << 2 : v1_size >= 4 ? v1_size >> 2 : 1, v4++) {
|
||||
//try all modes
|
||||
for(CinepakMode mode = 0; mode < MODE_COUNT; mode++) {
|
||||
//don't allow MODE_MC in inter frames
|
||||
if(keyframe && mode == MODE_MC)
|
||||
continue;
|
||||
|
||||
//only allow V1-only mode if v4 codebook is empty
|
||||
if(!v4_size && mode != MODE_V1_ONLY)
|
||||
continue;
|
||||
|
||||
info.v4_codebook = v4 >= 0 ? v4_codebooks[v4] : NULL;
|
||||
score = calculate_mode_score(s, mode, h, v1_size, v4_size, v4, &info);
|
||||
|
||||
//av_log(s->avctx, AV_LOG_INFO, "%3i %3i score = %li\n", v1_size, v4_size, score);
|
||||
|
||||
if(best_size == 0 || score < *best_score) {
|
||||
*best_score = score;
|
||||
best_size = encode_mode(s, mode, h, v1_size, v4_size, v4, scratch_pict, &info, s->strip_buf + STRIP_HEADER_SIZE);
|
||||
best_mode = mode;
|
||||
|
||||
av_log(s->avctx, AV_LOG_INFO, "mode %i, %3i, %3i: %18li %i B\n", mode, v1_size, v4_size, score, best_size);
|
||||
|
||||
#ifdef CINEPAKENC_DEBUG
|
||||
//save MB encoding choices
|
||||
memcpy(s->best_mb, s->mb, mb_count*sizeof(mb_info));
|
||||
#endif
|
||||
|
||||
//memcpy(strip_temp + STRIP_HEADER_SIZE, strip_temp, best_size);
|
||||
write_strip_header(s, y, h, keyframe, s->strip_buf, best_size);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CINEPAKENC_DEBUG
|
||||
//gather stats. this will only work properly of MAX_STRIPS == 1
|
||||
if(best_mode == MODE_V1_ONLY) {
|
||||
s->num_v1_mode++;
|
||||
s->num_v1_encs += s->w*h/MB_AREA;
|
||||
} else {
|
||||
if(best_mode == MODE_V1_V4)
|
||||
s->num_v4_mode++;
|
||||
else
|
||||
s->num_mc_mode++;
|
||||
|
||||
int x;
|
||||
for(x = 0; x < s->w*h/MB_AREA; x++)
|
||||
if(s->best_mb[x].best_encoding == ENC_V1)
|
||||
s->num_v1_encs++;
|
||||
else if(s->best_mb[x].best_encoding == ENC_V4)
|
||||
s->num_v4_encs++;
|
||||
else
|
||||
s->num_skips++;
|
||||
}
|
||||
#endif
|
||||
|
||||
best_size += STRIP_HEADER_SIZE;
|
||||
memcpy(buf, s->strip_buf, best_size);
|
||||
|
||||
|
||||
return best_size;
|
||||
}
|
||||
|
||||
static int write_cvid_header(CinepakEncContext *s, unsigned char *buf, int num_strips, int data_size)
|
||||
{
|
||||
buf[0] = 0;
|
||||
AV_WB24(&buf[1], data_size + CVID_HEADER_SIZE);
|
||||
AV_WB16(&buf[4], s->w);
|
||||
AV_WB16(&buf[6], s->h);
|
||||
AV_WB16(&buf[8], num_strips);
|
||||
|
||||
return CVID_HEADER_SIZE;
|
||||
}
|
||||
|
||||
static int rd_frame(CinepakEncContext *s, AVFrame *frame, unsigned char *buf, int buf_size)
|
||||
{
|
||||
int num_strips, strip, h, i, y, size, temp_size, best_size;
|
||||
AVPicture last_pict, pict, scratch_pict;
|
||||
int64_t best_score = 0, score, score_temp;
|
||||
|
||||
//TODO: support encoding zero strips (meaning skip the whole frame)
|
||||
for(num_strips = MIN_STRIPS; num_strips <= MAX_STRIPS && num_strips <= s->h / MB_SIZE; num_strips++) {
|
||||
score = 0;
|
||||
size = 0;
|
||||
h = s->h / num_strips;
|
||||
//make h into next multiple of 4
|
||||
h += 4 - (h & 3);
|
||||
|
||||
for(strip = 0; strip < num_strips; strip++) {
|
||||
y = strip*h;
|
||||
|
||||
get_sub_picture(s, 0, y, (AVPicture*)frame, &pict);
|
||||
get_sub_picture(s, 0, y, (AVPicture*)&s->last_frame, &last_pict);
|
||||
get_sub_picture(s, 0, y, (AVPicture*)&s->scratch_frame, &scratch_pict);
|
||||
|
||||
if((temp_size = rd_strip(s, y, FFMIN(h, s->h - y), frame->key_frame, &last_pict, &pict, &scratch_pict, s->frame_buf + CVID_HEADER_SIZE, &score_temp)) < 0)
|
||||
return temp_size;
|
||||
|
||||
score += score_temp;
|
||||
size += temp_size;
|
||||
}
|
||||
|
||||
if(best_score == 0 || score < best_score) {
|
||||
best_score = score;
|
||||
best_size = size + write_cvid_header(s, s->frame_buf, num_strips, size);
|
||||
av_log(s->avctx, AV_LOG_INFO, "best number of strips so far: %2i, %12li, %i B\n", num_strips, score, best_size);
|
||||
|
||||
FFSWAP(AVFrame, s->best_frame, s->scratch_frame);
|
||||
}
|
||||
}
|
||||
|
||||
memcpy(buf, s->frame_buf, best_size);
|
||||
|
||||
return best_size;
|
||||
}
|
||||
|
||||
static int cinepak_encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data)
|
||||
{
|
||||
CinepakEncContext *s = avctx->priv_data;
|
||||
AVFrame *frame = data;
|
||||
int ret;
|
||||
|
||||
s->lambda = frame->quality ? frame->quality - 1 : 2 * FF_LAMBDA_SCALE;
|
||||
|
||||
frame->key_frame = s->curframe == 0;
|
||||
frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
||||
|
||||
ret = rd_frame(s, frame, buf, buf_size);
|
||||
|
||||
FFSWAP(AVFrame, s->last_frame, s->best_frame);
|
||||
|
||||
if (++s->curframe >= s->keyint)
|
||||
s->curframe = 0;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static av_cold int cinepak_encode_end(AVCodecContext *avctx)
|
||||
{
|
||||
CinepakEncContext *s = avctx->priv_data;
|
||||
int x;
|
||||
|
||||
av_free(s->codebook_input);
|
||||
av_free(s->codebook_closest);
|
||||
av_free(s->strip_buf);
|
||||
av_free(s->frame_buf);
|
||||
av_free(s->mb);
|
||||
#ifdef CINEPAKENC_DEBUG
|
||||
av_free(s->best_mb);
|
||||
#endif
|
||||
|
||||
for(x = 0; x < 3; x++)
|
||||
av_free(s->pict_bufs[x]);
|
||||
|
||||
av_log(avctx, AV_LOG_INFO, "strip coding stats: %i V1 mode, %i V4 mode, %i MC mode (%i V1 encs, %i V4 encs, %i skips)\n",
|
||||
s->num_v1_mode, s->num_v4_mode, s->num_mc_mode, s->num_v1_encs, s->num_v4_encs, s->num_skips);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVCodec ff_cinepak_encoder = {
|
||||
.name = "cinepak",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.id = AV_CODEC_ID_CINEPAK,
|
||||
.priv_data_size = sizeof(CinepakEncContext),
|
||||
.init = cinepak_encode_init,
|
||||
.encode2 = cinepak_encode_frame,
|
||||
.close = cinepak_encode_end,
|
||||
.pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_RGB24, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE},
|
||||
.long_name = NULL_IF_CONFIG_SMALL("Cinepak"),
|
||||
};
|
||||
Loading…
x
Reference in New Issue
Block a user