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Diffstat (limited to 'ffmpeg/libavcodec/msvideo1enc.c')
-rw-r--r--ffmpeg/libavcodec/msvideo1enc.c305
1 files changed, 0 insertions, 305 deletions
diff --git a/ffmpeg/libavcodec/msvideo1enc.c b/ffmpeg/libavcodec/msvideo1enc.c
deleted file mode 100644
index 9928250..0000000
--- a/ffmpeg/libavcodec/msvideo1enc.c
+++ /dev/null
@@ -1,305 +0,0 @@
-/*
- * Microsoft Video-1 Encoder
- * Copyright (c) 2009 Konstantin Shishkov
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Microsoft Video-1 encoder
- */
-
-#include "avcodec.h"
-#include "internal.h"
-#include "bytestream.h"
-#include "libavutil/lfg.h"
-#include "elbg.h"
-#include "libavutil/imgutils.h"
-/**
- * Encoder context
- */
-typedef struct Msvideo1EncContext {
- AVCodecContext *avctx;
- AVLFG rnd;
- uint8_t *prev;
-
- int block[16*3];
- int block2[16*3];
- int codebook[8*3];
- int codebook2[8*3];
- int output[16*3];
- int output2[16*3];
- int avg[3];
- int bestpos;
- int keyint;
-} Msvideo1EncContext;
-
-enum MSV1Mode{
- MODE_SKIP = 0,
- MODE_FILL,
- MODE_2COL,
- MODE_8COL,
-};
-
-#define SKIP_PREFIX 0x8400
-#define SKIPS_MAX 0x0FFF
-#define MKRGB555(in, off) ((in[off] << 10) | (in[off + 1] << 5) | (in[off + 2]))
-
-static const int remap[16] = { 0, 1, 4, 5, 2, 3, 6, 7, 8, 9, 12, 13, 10, 11, 14, 15 };
-
-static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
- const AVFrame *pict, int *got_packet)
-{
- Msvideo1EncContext * const c = avctx->priv_data;
- const AVFrame *p = pict;
- uint16_t *src;
- uint8_t *prevptr;
- uint8_t *dst, *buf;
- int keyframe = 0;
- int no_skips = 1;
- int i, j, k, x, y, ret;
- int skips = 0;
- int quality = 24;
-
- if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width*avctx->height*9 + FF_MIN_BUFFER_SIZE)) < 0)
- return ret;
- dst= buf= pkt->data;
-
- if(!c->prev)
- c->prev = av_malloc(avctx->width * 3 * (avctx->height + 3));
- prevptr = c->prev + avctx->width * 3 * (FFALIGN(avctx->height, 4) - 1);
- src = (uint16_t*)(p->data[0] + p->linesize[0]*(FFALIGN(avctx->height, 4) - 1));
- if(c->keyint >= avctx->keyint_min)
- keyframe = 1;
-
-
- for(y = 0; y < avctx->height; y += 4){
- for(x = 0; x < avctx->width; x += 4){
- int bestmode = MODE_SKIP;
- int bestscore = INT_MAX;
- int flags = 0;
- int score;
-
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- uint16_t val = src[x + i - j*p->linesize[0]/2];
- for(k = 0; k < 3; k++){
- c->block[(i + j*4)*3 + k] =
- c->block2[remap[i + j*4]*3 + k] = (val >> (10-k*5)) & 0x1F;
- }
- }
- }
- if(!keyframe){
- bestscore = 0;
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4*3; i++){
- int t = prevptr[x*3 + i - j*3*avctx->width] - c->block[i + j*4*3];
- bestscore += t*t;
- }
- }
- bestscore /= quality;
- }
- // try to find optimal value to fill whole 4x4 block
- score = 0;
- avpriv_init_elbg(c->block, 3, 16, c->avg, 1, 1, c->output, &c->rnd);
- avpriv_do_elbg (c->block, 3, 16, c->avg, 1, 1, c->output, &c->rnd);
- if(c->avg[0] == 1) // red component = 1 will be written as skip code
- c->avg[0] = 0;
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- for(k = 0; k < 3; k++){
- int t = c->avg[k] - c->block[(i+j*4)*3+k];
- score += t*t;
- }
- }
- }
- score /= quality;
- score += 2;
- if(score < bestscore){
- bestscore = score;
- bestmode = MODE_FILL;
- }
- // search for optimal filling of 2-color block
- score = 0;
- avpriv_init_elbg(c->block, 3, 16, c->codebook, 2, 1, c->output, &c->rnd);
- avpriv_do_elbg (c->block, 3, 16, c->codebook, 2, 1, c->output, &c->rnd);
- // last output value should be always 1, swap codebooks if needed
- if(!c->output[15]){
- for(i = 0; i < 3; i++)
- FFSWAP(uint8_t, c->codebook[i], c->codebook[i+3]);
- for(i = 0; i < 16; i++)
- c->output[i] ^= 1;
- }
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- for(k = 0; k < 3; k++){
- int t = c->codebook[c->output[i+j*4]*3 + k] - c->block[i*3+k+j*4*3];
- score += t*t;
- }
- }
- }
- score /= quality;
- score += 6;
- if(score < bestscore){
- bestscore = score;
- bestmode = MODE_2COL;
- }
- // search for optimal filling of 2-color 2x2 subblocks
- score = 0;
- for(i = 0; i < 4; i++){
- avpriv_init_elbg(c->block2 + i*4*3, 3, 4, c->codebook2 + i*2*3, 2, 1, c->output2 + i*4, &c->rnd);
- avpriv_do_elbg (c->block2 + i*4*3, 3, 4, c->codebook2 + i*2*3, 2, 1, c->output2 + i*4, &c->rnd);
- }
- // last value should be always 1, swap codebooks if needed
- if(!c->output2[15]){
- for(i = 0; i < 3; i++)
- FFSWAP(uint8_t, c->codebook2[i+18], c->codebook2[i+21]);
- for(i = 12; i < 16; i++)
- c->output2[i] ^= 1;
- }
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- for(k = 0; k < 3; k++){
- int t = c->codebook2[(c->output2[remap[i+j*4]] + (i&2) + (j&2)*2)*3+k] - c->block[i*3+k + j*4*3];
- score += t*t;
- }
- }
- }
- score /= quality;
- score += 18;
- if(score < bestscore){
- bestscore = score;
- bestmode = MODE_8COL;
- }
-
- if(bestmode == MODE_SKIP){
- skips++;
- no_skips = 0;
- }
- if((bestmode != MODE_SKIP && skips) || skips == SKIPS_MAX){
- bytestream_put_le16(&dst, skips | SKIP_PREFIX);
- skips = 0;
- }
-
- switch(bestmode){
- case MODE_FILL:
- bytestream_put_le16(&dst, MKRGB555(c->avg,0) | 0x8000);
- for(j = 0; j < 4; j++)
- for(i = 0; i < 4; i++)
- for(k = 0; k < 3; k++)
- prevptr[x*3 + i*3 + k - j*3*avctx->width] = c->avg[k];
- break;
- case MODE_2COL:
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- flags |= (c->output[i + j*4]^1) << (i + j*4);
- for(k = 0; k < 3; k++)
- prevptr[x*3 + i*3 + k - j*3*avctx->width] = c->codebook[c->output[i + j*4]*3 + k];
- }
- }
- bytestream_put_le16(&dst, flags);
- bytestream_put_le16(&dst, MKRGB555(c->codebook, 0));
- bytestream_put_le16(&dst, MKRGB555(c->codebook, 3));
- break;
- case MODE_8COL:
- for(j = 0; j < 4; j++){
- for(i = 0; i < 4; i++){
- flags |= (c->output2[remap[i + j*4]]^1) << (i + j*4);
- for(k = 0; k < 3; k++)
- prevptr[x*3 + i*3 + k - j*3*avctx->width] = c->codebook2[(c->output2[remap[i+j*4]] + (i&2) + (j&2)*2)*3 + k];
- }
- }
- bytestream_put_le16(&dst, flags);
- bytestream_put_le16(&dst, MKRGB555(c->codebook2, 0) | 0x8000);
- for(i = 3; i < 24; i += 3)
- bytestream_put_le16(&dst, MKRGB555(c->codebook2, i));
- break;
- }
- }
- src -= p->linesize[0] << 1;
- prevptr -= avctx->width * 3 * 4;
- }
- if(skips)
- bytestream_put_le16(&dst, skips | SKIP_PREFIX);
- //EOF
- bytestream_put_byte(&dst, 0);
- bytestream_put_byte(&dst, 0);
-
- if(no_skips)
- keyframe = 1;
- if(keyframe)
- c->keyint = 0;
- else
- c->keyint++;
- if (keyframe) pkt->flags |= AV_PKT_FLAG_KEY;
- pkt->size = dst - buf;
- *got_packet = 1;
-
- return 0;
-}
-
-
-/**
- * init encoder
- */
-static av_cold int encode_init(AVCodecContext *avctx)
-{
- Msvideo1EncContext * const c = avctx->priv_data;
-
- c->avctx = avctx;
- if (av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0) {
- return -1;
- }
- if((avctx->width&3) || (avctx->height&3)){
- av_log(avctx, AV_LOG_ERROR, "width and height must be multiplies of 4\n");
- return -1;
- }
-
- avctx->bits_per_coded_sample = 16;
-
- c->keyint = avctx->keyint_min;
- av_lfg_init(&c->rnd, 1);
-
- return 0;
-}
-
-
-
-/**
- * Uninit encoder
- */
-static av_cold int encode_end(AVCodecContext *avctx)
-{
- Msvideo1EncContext * const c = avctx->priv_data;
-
- av_freep(&c->prev);
-
- return 0;
-}
-
-AVCodec ff_msvideo1_encoder = {
- .name = "msvideo1",
- .long_name = NULL_IF_CONFIG_SMALL("Microsoft Video-1"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MSVIDEO1,
- .priv_data_size = sizeof(Msvideo1EncContext),
- .init = encode_init,
- .encode2 = encode_frame,
- .close = encode_end,
- .pix_fmts = (const enum AVPixelFormat[]){AV_PIX_FMT_RGB555, AV_PIX_FMT_NONE},
-};
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