2007-05-18 22:42:49 +00:00
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/*
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* lossless JPEG encoder
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2009-01-19 15:46:40 +00:00
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* Copyright (c) 2000, 2001 Fabrice Bellard
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2007-05-18 22:42:49 +00:00
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* Copyright (c) 2003 Alex Beregszaszi
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* Copyright (c) 2003-2004 Michael Niedermayer
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*
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2007-07-05 10:37:29 +00:00
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* Support for external huffman table, various fixes (AVID workaround),
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* aspecting, new decode_frame mechanism and apple mjpeg-b support
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* by Alex Beregszaszi
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*
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2011-03-18 17:35:10 +00:00
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* This file is part of Libav.
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2007-05-18 22:42:49 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is free software; you can redistribute it and/or
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2007-05-18 22:42:49 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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2011-03-18 17:35:10 +00:00
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* Libav is distributed in the hope that it will be useful,
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2007-05-18 22:42:49 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2011-03-18 17:35:10 +00:00
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* License along with Libav; if not, write to the Free Software
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2007-05-18 22:42:49 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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2010-04-20 14:45:34 +00:00
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* @file
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2007-05-18 22:42:49 +00:00
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* lossless JPEG encoder.
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*/
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2013-12-02 18:22:54 +00:00
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#include "libavutil/frame.h"
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#include "libavutil/mem.h"
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#include "libavutil/pixdesc.h"
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2007-05-18 22:42:49 +00:00
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#include "avcodec.h"
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2013-12-02 18:22:54 +00:00
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#include "dsputil.h"
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2012-02-20 12:21:58 +00:00
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#include "internal.h"
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2007-05-18 22:42:49 +00:00
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#include "mpegvideo.h"
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#include "mjpeg.h"
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#include "mjpegenc.h"
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2013-12-02 18:22:54 +00:00
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typedef struct LJpegEncContext {
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DSPContext dsp;
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ScanTable scantable;
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uint16_t matrix[64];
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int vsample[3];
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int hsample[3];
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uint16_t huff_code_dc_luminance[12];
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uint16_t huff_code_dc_chrominance[12];
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uint8_t huff_size_dc_luminance[12];
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uint8_t huff_size_dc_chrominance[12];
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uint16_t (*scratch)[4];
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} LJpegEncContext;
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2007-05-18 22:42:49 +00:00
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2013-12-02 22:56:51 +00:00
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static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
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const AVFrame *frame)
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{
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LJpegEncContext *s = avctx->priv_data;
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const int width = frame->width;
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const int height = frame->height;
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const int linesize = frame->linesize[0];
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uint16_t (*buffer)[4] = s->scratch;
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const int predictor = avctx->prediction_method+1;
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int left[3], top[3], topleft[3];
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int x, y, i;
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for (i = 0; i < 3; i++)
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buffer[0][i] = 1 << (9 - 1);
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for (y = 0; y < height; y++) {
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const int modified_predictor = y ? predictor : 1;
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uint8_t *ptr = frame->data[0] + (linesize * y);
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if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 3 * 3) {
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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for (i = 0; i < 3; i++)
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top[i]= left[i]= topleft[i]= buffer[0][i];
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for (x = 0; x < width; x++) {
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buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
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buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
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buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
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for (i = 0; i < 3; i++) {
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int pred, diff;
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PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
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topleft[i] = top[i];
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top[i] = buffer[x+1][i];
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left[i] = buffer[x][i];
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diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
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if (i == 0)
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ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
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else
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ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
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}
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}
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}
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return 0;
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}
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2013-12-02 22:56:51 +00:00
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static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
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const AVFrame *frame, int predictor,
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int mb_x, int mb_y)
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{
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int i;
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if (mb_x == 0 || mb_y == 0) {
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for (i = 0; i < 3; i++) {
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uint8_t *ptr;
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int x, y, h, v, linesize;
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h = s->hsample[i];
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v = s->vsample[i];
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linesize = frame->linesize[i];
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for (y = 0; y < v; y++) {
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for (x = 0; x < h; x++) {
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int pred;
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ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
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if (y == 0 && mb_y == 0) {
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if (x == 0 && mb_x == 0)
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pred = 128;
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else
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pred = ptr[-1];
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} else {
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if (x == 0 && mb_x == 0) {
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pred = ptr[-linesize];
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} else {
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PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
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ptr[-1], predictor);
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}
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}
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if (i == 0)
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
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else
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
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}
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}
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}
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} else {
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for (i = 0; i < 3; i++) {
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uint8_t *ptr;
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int x, y, h, v, linesize;
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h = s->hsample[i];
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v = s->vsample[i];
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linesize = frame->linesize[i];
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for (y = 0; y < v; y++) {
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for (x = 0; x < h; x++) {
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int pred;
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ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
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PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
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if (i == 0)
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
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else
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ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
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}
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}
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}
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}
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}
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static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
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const AVFrame *frame)
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{
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const int predictor = avctx->prediction_method + 1;
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LJpegEncContext *s = avctx->priv_data;
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const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
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const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
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int mb_x, mb_y;
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for (mb_y = 0; mb_y < mb_height; mb_y++) {
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if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
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mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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for (mb_x = 0; mb_x < mb_width; mb_x++)
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ljpeg_encode_yuv_mb(s, pb, frame, predictor, mb_x, mb_y);
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}
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return 0;
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}
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2013-12-02 22:34:37 +00:00
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static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pict, int *got_packet)
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2012-02-20 12:21:58 +00:00
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{
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2013-12-02 18:22:54 +00:00
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LJpegEncContext *s = avctx->priv_data;
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PutBitContext pb;
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const int width = avctx->width;
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const int height = avctx->height;
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const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
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const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
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int max_pkt_size = FF_MIN_BUFFER_SIZE;
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int ret, header_bits;
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2012-02-20 12:21:58 +00:00
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2013-12-02 22:49:11 +00:00
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if (avctx->pix_fmt == AV_PIX_FMT_BGR24)
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max_pkt_size += width * height * 3 * 3;
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2012-02-20 12:21:58 +00:00
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else {
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max_pkt_size += mb_width * mb_height * 3 * 4
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2013-12-02 18:22:54 +00:00
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* s->hsample[0] * s->vsample[0];
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2012-02-20 12:21:58 +00:00
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}
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if ((ret = ff_alloc_packet(pkt, max_pkt_size)) < 0) {
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av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", max_pkt_size);
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return ret;
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}
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2007-05-18 22:42:49 +00:00
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2013-12-02 18:22:54 +00:00
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init_put_bits(&pb, pkt->data, pkt->size);
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2007-05-18 22:42:49 +00:00
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2013-12-02 18:22:54 +00:00
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ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
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s->matrix);
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2007-05-18 22:42:49 +00:00
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2013-12-02 18:22:54 +00:00
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header_bits = put_bits_count(&pb);
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2007-05-18 22:42:49 +00:00
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2013-12-02 22:56:51 +00:00
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if (avctx->pix_fmt == AV_PIX_FMT_BGR24)
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2013-12-02 22:56:51 +00:00
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ret = ljpeg_encode_bgr(avctx, &pb, pict);
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2013-12-02 22:56:51 +00:00
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else
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ret = ljpeg_encode_yuv(avctx, &pb, pict);
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if (ret < 0)
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return ret;
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2007-05-18 22:42:49 +00:00
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emms_c();
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2013-12-02 18:22:54 +00:00
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ff_mjpeg_encode_picture_trailer(&pb, header_bits);
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2007-05-18 22:42:49 +00:00
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2013-12-02 18:22:54 +00:00
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flush_put_bits(&pb);
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pkt->size = put_bits_ptr(&pb) - pb.buf;
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2012-02-20 12:21:58 +00:00
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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2007-05-18 22:42:49 +00:00
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}
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2013-12-02 18:22:54 +00:00
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static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
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{
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LJpegEncContext *s = avctx->priv_data;
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av_frame_free(&avctx->coded_frame);
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av_freep(&s->scratch);
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return 0;
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}
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static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
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{
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LJpegEncContext *s = avctx->priv_data;
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int chroma_v_shift, chroma_h_shift;
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if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
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avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
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avctx->pix_fmt == AV_PIX_FMT_YUV444P) &&
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avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
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av_log(avctx, AV_LOG_ERROR,
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"Limited range YUV is non-standard, set strict_std_compliance to "
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"at least unofficial to use it.\n");
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return AVERROR(EINVAL);
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}
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avctx->coded_frame = av_frame_alloc();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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avctx->coded_frame->key_frame = 1;
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s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
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ff_dsputil_init(&s->dsp, avctx);
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ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
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av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
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&chroma_v_shift);
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2013-12-02 22:49:11 +00:00
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if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
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2013-12-02 18:22:54 +00:00
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s->vsample[0] = s->hsample[0] =
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s->vsample[1] = s->hsample[1] =
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s->vsample[2] = s->hsample[2] = 1;
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} else {
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s->vsample[0] = 2;
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s->vsample[1] = 2 >> chroma_v_shift;
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s->vsample[2] = 2 >> chroma_v_shift;
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s->hsample[0] = 2;
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s->hsample[1] = 2 >> chroma_h_shift;
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s->hsample[2] = 2 >> chroma_h_shift;
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}
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ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
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s->huff_code_dc_luminance,
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avpriv_mjpeg_bits_dc_luminance,
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avpriv_mjpeg_val_dc);
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ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
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s->huff_code_dc_chrominance,
|
|
|
|
avpriv_mjpeg_bits_dc_chrominance,
|
|
|
|
avpriv_mjpeg_val_dc);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2007-05-18 22:42:49 +00:00
|
|
|
|
2013-12-02 18:22:54 +00:00
|
|
|
AVCodec ff_ljpeg_encoder = {
|
2011-09-23 19:11:15 +00:00
|
|
|
.name = "ljpeg",
|
2013-10-03 20:57:53 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
|
2011-09-23 19:11:15 +00:00
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 09:11:04 +00:00
|
|
|
.id = AV_CODEC_ID_LJPEG,
|
2013-12-02 18:22:54 +00:00
|
|
|
.priv_data_size = sizeof(LJpegEncContext),
|
|
|
|
.init = ljpeg_encode_init,
|
2013-12-02 22:34:37 +00:00
|
|
|
.encode2 = ljpeg_encode_frame,
|
2013-12-02 18:22:54 +00:00
|
|
|
.close = ljpeg_encode_close,
|
|
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ420P,
|
|
|
|
AV_PIX_FMT_YUVJ422P,
|
|
|
|
AV_PIX_FMT_YUVJ444P,
|
2013-12-02 22:49:11 +00:00
|
|
|
AV_PIX_FMT_BGR24,
|
2013-12-02 18:22:54 +00:00
|
|
|
AV_PIX_FMT_YUV420P,
|
|
|
|
AV_PIX_FMT_YUV422P,
|
2014-03-12 14:19:12 +00:00
|
|
|
AV_PIX_FMT_YUV444P,
|
2013-12-02 18:22:54 +00:00
|
|
|
AV_PIX_FMT_NONE },
|
2007-05-18 22:42:49 +00:00
|
|
|
};
|