2007-07-02 07:06:28 +00:00
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/*
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* Quicktime Animation (RLE) Video Encoder
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* Copyright (C) 2007 Clemens Fruhwirth
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* Copyright (C) 2007 Alexis Ballier
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*
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2008-09-06 16:15:45 +00:00
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* This file is based on flashsvenc.c.
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2007-07-02 07:06:28 +00:00
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*
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2008-09-06 16:15:45 +00:00
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* This file is part of FFmpeg.
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2007-07-02 07:06:28 +00:00
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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2008-09-07 21:02:28 +00:00
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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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2007-07-02 07:06:28 +00:00
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*
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* FFmpeg is distributed in the hope that it will be useful,
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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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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2011-02-07 13:37:08 +00:00
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#include "libavutil/imgutils.h"
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2007-07-02 07:06:28 +00:00
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#include "avcodec.h"
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#include "bytestream.h"
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2012-02-12 08:32:40 +00:00
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#include "internal.h"
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2007-07-02 07:06:28 +00:00
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/** Maximum RLE code for bulk copy */
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#define MAX_RLE_BULK 127
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/** Maximum RLE code for repeat */
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#define MAX_RLE_REPEAT 128
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/** Maximum RLE code for skip */
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#define MAX_RLE_SKIP 254
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typedef struct QtrleEncContext {
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AVCodecContext *avctx;
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AVFrame frame;
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int pixel_size;
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AVPicture previous_frame;
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unsigned int max_buf_size;
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2011-05-08 18:52:54 +00:00
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int logical_width;
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2007-07-02 07:06:28 +00:00
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/**
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* This array will contain at ith position the value of the best RLE code
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* if the line started at pixel i
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* There can be 3 values :
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* skip (0) : skip as much as possible pixels because they are equal to the
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* previous frame ones
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* repeat (<-1) : repeat that pixel -rle_code times, still as much as
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* possible
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* copy (>0) : copy the raw next rle_code pixels */
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signed char *rlecode_table;
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/**
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* This array will contain the length of the best rle encoding of the line
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* starting at ith pixel */
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int *length_table;
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/**
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* Will contain at ith position the number of consecutive pixels equal to the previous
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* frame starting from pixel i */
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uint8_t* skip_table;
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} QtrleEncContext;
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2008-03-21 03:11:20 +00:00
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static av_cold int qtrle_encode_init(AVCodecContext *avctx)
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2007-07-02 07:06:28 +00:00
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{
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QtrleEncContext *s = avctx->priv_data;
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2012-06-19 11:03:03 +00:00
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int ret;
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2007-07-02 07:06:28 +00:00
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2010-09-07 19:15:29 +00:00
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if (av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0) {
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2012-06-19 11:03:03 +00:00
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return AVERROR(EINVAL);
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2007-07-02 07:06:28 +00:00
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}
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s->avctx=avctx;
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2011-05-08 18:52:54 +00:00
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s->logical_width=avctx->width;
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2007-07-02 07:06:28 +00:00
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switch (avctx->pix_fmt) {
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2012-10-08 18:54:00 +00:00
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case AV_PIX_FMT_GRAY8:
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2011-05-08 18:52:54 +00:00
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s->logical_width = avctx->width / 4;
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s->pixel_size = 4;
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break;
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2012-10-06 10:10:34 +00:00
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case AV_PIX_FMT_RGB555BE:
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2007-07-02 07:06:28 +00:00
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s->pixel_size = 2;
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2010-03-17 13:04:33 +00:00
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break;
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2012-10-06 10:10:34 +00:00
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case AV_PIX_FMT_RGB24:
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2007-07-02 07:06:28 +00:00
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s->pixel_size = 3;
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break;
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2012-10-06 10:10:34 +00:00
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case AV_PIX_FMT_ARGB:
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2009-07-08 14:58:16 +00:00
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s->pixel_size = 4;
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break;
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2007-07-02 07:06:28 +00:00
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported colorspace.\n");
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break;
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}
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2012-10-08 18:54:00 +00:00
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avctx->bits_per_coded_sample = avctx->pix_fmt == AV_PIX_FMT_GRAY8 ? 40 : s->pixel_size*8;
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2007-07-02 07:06:28 +00:00
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2011-05-08 18:52:54 +00:00
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s->rlecode_table = av_mallocz(s->logical_width);
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s->skip_table = av_mallocz(s->logical_width);
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s->length_table = av_mallocz((s->logical_width + 1)*sizeof(int));
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2007-07-02 07:06:28 +00:00
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if (!s->skip_table || !s->length_table || !s->rlecode_table) {
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av_log(avctx, AV_LOG_ERROR, "Error allocating memory.\n");
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2012-06-19 11:03:03 +00:00
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return AVERROR(ENOMEM);
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2007-07-02 07:06:28 +00:00
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}
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2012-06-19 11:03:03 +00:00
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if ((ret = avpicture_alloc(&s->previous_frame, avctx->pix_fmt, avctx->width, avctx->height)) < 0) {
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2007-07-02 07:06:28 +00:00
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av_log(avctx, AV_LOG_ERROR, "Error allocating picture\n");
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2012-06-19 11:03:03 +00:00
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return ret;
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2007-07-02 07:06:28 +00:00
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}
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2012-02-24 01:57:18 +00:00
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s->max_buf_size = s->logical_width*s->avctx->height*s->pixel_size*2 /* image base material */
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2011-05-08 18:52:54 +00:00
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+ 15 /* header + footer */
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+ s->avctx->height*2 /* skip code+rle end */
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+ s->logical_width/MAX_RLE_BULK + 1 /* rle codes */;
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2007-07-02 07:06:28 +00:00
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avctx->coded_frame = &s->frame;
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return 0;
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}
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/**
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2010-06-30 15:38:06 +00:00
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* Compute the best RLE sequence for a line
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2007-07-02 07:06:28 +00:00
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*/
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2012-02-12 08:32:40 +00:00
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static void qtrle_encode_line(QtrleEncContext *s, const AVFrame *p, int line, uint8_t **buf)
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2007-07-02 07:06:28 +00:00
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{
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2011-05-08 18:52:54 +00:00
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int width=s->logical_width;
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2007-07-02 07:06:28 +00:00
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int i;
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signed char rlecode;
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/* This will be the number of pixels equal to the preivous frame one's
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* starting from the ith pixel */
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unsigned int skipcount;
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/* This will be the number of consecutive equal pixels in the current
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* frame, starting from the ith one also */
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2012-02-16 19:11:33 +00:00
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unsigned int av_uninit(repeatcount);
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2007-07-02 07:06:28 +00:00
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/* The cost of the three different possibilities */
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int total_skip_cost;
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int total_repeat_cost;
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2013-02-20 20:50:34 +00:00
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int base_bulk_cost;
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int lowest_bulk_cost;
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int lowest_bulk_cost_index;
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int sec_lowest_bulk_cost;
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int sec_lowest_bulk_cost_index;
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2007-07-02 07:06:28 +00:00
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2009-05-23 05:55:29 +00:00
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uint8_t *this_line = p-> data[0] + line*p-> linesize[0] +
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(width - 1)*s->pixel_size;
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uint8_t *prev_line = s->previous_frame.data[0] + line*s->previous_frame.linesize[0] +
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(width - 1)*s->pixel_size;
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2007-07-02 07:06:28 +00:00
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s->length_table[width] = 0;
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skipcount = 0;
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2013-02-20 20:50:34 +00:00
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/* Initial values */
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lowest_bulk_cost = INT_MAX / 2;
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lowest_bulk_cost_index = width;
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sec_lowest_bulk_cost = INT_MAX / 2;
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sec_lowest_bulk_cost_index = width;
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base_bulk_cost = 1 + s->pixel_size;
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2007-07-02 07:06:28 +00:00
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for (i = width - 1; i >= 0; i--) {
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2013-02-20 20:50:34 +00:00
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int prev_bulk_cost;
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/* If our lowest bulk cost index is too far away, replace it
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* with the next lowest bulk cost */
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if (FFMIN(width, i + MAX_RLE_BULK) < lowest_bulk_cost_index) {
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lowest_bulk_cost = sec_lowest_bulk_cost;
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lowest_bulk_cost_index = sec_lowest_bulk_cost_index;
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sec_lowest_bulk_cost = INT_MAX / 2;
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sec_lowest_bulk_cost_index = width;
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}
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/* Deal with the first pixel's bulk cost */
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if (!i) {
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base_bulk_cost++;
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lowest_bulk_cost++;
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sec_lowest_bulk_cost++;
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}
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/* Look at the bulk cost of the previous loop and see if it is
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* a new lower bulk cost */
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prev_bulk_cost = s->length_table[i + 1] + base_bulk_cost;
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if (prev_bulk_cost <= sec_lowest_bulk_cost) {
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/* If it's lower than the 2nd lowest, then it may be lower
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* than the lowest */
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if (prev_bulk_cost <= lowest_bulk_cost) {
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/* If we have found a new lowest bulk cost,
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* then the 2nd lowest bulk cost is now farther than the
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* lowest bulk cost, and will never be used */
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sec_lowest_bulk_cost = INT_MAX / 2;
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lowest_bulk_cost = prev_bulk_cost;
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lowest_bulk_cost_index = i + 1;
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} else {
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/* Then it must be the 2nd lowest bulk cost */
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sec_lowest_bulk_cost = prev_bulk_cost;
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sec_lowest_bulk_cost_index = i + 1;
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}
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}
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2007-07-02 07:06:28 +00:00
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if (!s->frame.key_frame && !memcmp(this_line, prev_line, s->pixel_size))
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skipcount = FFMIN(skipcount + 1, MAX_RLE_SKIP);
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else
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skipcount = 0;
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total_skip_cost = s->length_table[i + skipcount] + 2;
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s->skip_table[i] = skipcount;
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if (i < width - 1 && !memcmp(this_line, this_line + s->pixel_size, s->pixel_size))
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repeatcount = FFMIN(repeatcount + 1, MAX_RLE_REPEAT);
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else
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repeatcount = 1;
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total_repeat_cost = s->length_table[i + repeatcount] + 1 + s->pixel_size;
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/* skip code is free for the first pixel, it costs one byte for repeat and bulk copy
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* so let's make it aware */
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if (i == 0) {
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total_skip_cost--;
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total_repeat_cost++;
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}
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if (repeatcount > 1 && (skipcount == 0 || total_repeat_cost < total_skip_cost)) {
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/* repeat is the best */
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s->length_table[i] = total_repeat_cost;
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s->rlecode_table[i] = -repeatcount;
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}
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else if (skipcount > 0) {
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/* skip is the best choice here */
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s->length_table[i] = total_skip_cost;
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s->rlecode_table[i] = 0;
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}
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else {
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/* We cannot do neither skip nor repeat
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2013-02-20 20:50:34 +00:00
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* thus we use the best bulk copy */
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2007-07-02 07:06:28 +00:00
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2013-02-20 20:50:34 +00:00
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s->length_table[i] = lowest_bulk_cost;
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s->rlecode_table[i] = lowest_bulk_cost_index - i;
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2007-07-02 07:06:28 +00:00
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}
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2013-02-20 20:50:34 +00:00
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/* These bulk costs increase every iteration */
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lowest_bulk_cost += s->pixel_size;
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sec_lowest_bulk_cost += s->pixel_size;
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2007-07-02 07:06:28 +00:00
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this_line -= s->pixel_size;
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prev_line -= s->pixel_size;
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}
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2012-01-26 22:03:35 +00:00
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/* Good ! Now we have the best sequence for this line, let's output it */
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2007-07-02 07:06:28 +00:00
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/* We do a special case for the first pixel so that we avoid testing it in
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* the whole loop */
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i=0;
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this_line = p-> data[0] + line*p->linesize[0];
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if (s->rlecode_table[0] == 0) {
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bytestream_put_byte(buf, s->skip_table[0] + 1);
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i += s->skip_table[0];
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}
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else bytestream_put_byte(buf, 1);
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while (i < width) {
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rlecode = s->rlecode_table[i];
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bytestream_put_byte(buf, rlecode);
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if (rlecode == 0) {
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/* Write a skip sequence */
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bytestream_put_byte(buf, s->skip_table[i] + 1);
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i += s->skip_table[i];
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}
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else if (rlecode > 0) {
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/* bulk copy */
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2012-10-08 18:54:00 +00:00
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if (s->avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
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2011-06-08 14:38:37 +00:00
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int j;
|
2011-05-08 18:52:54 +00:00
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// QT grayscale colorspace has 0=white and 255=black, we will
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// ignore the palette that is included in the AVFrame because
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2012-10-08 18:54:00 +00:00
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// AV_PIX_FMT_GRAY8 has defined color mapping
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2011-06-08 14:38:37 +00:00
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for (j = 0; j < rlecode*s->pixel_size; ++j)
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2011-05-08 18:52:54 +00:00
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bytestream_put_byte(buf, *(this_line + i*s->pixel_size + j) ^ 0xff);
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} else {
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bytestream_put_buffer(buf, this_line + i*s->pixel_size, rlecode*s->pixel_size);
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}
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2007-07-02 07:06:28 +00:00
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i += rlecode;
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}
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else {
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/* repeat the bits */
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2012-10-08 18:54:00 +00:00
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if (s->avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
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2011-06-08 14:38:37 +00:00
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int j;
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2011-05-08 18:52:54 +00:00
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// QT grayscale colorspace has 0=white and 255=black, ...
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2011-06-08 14:38:37 +00:00
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for (j = 0; j < s->pixel_size; ++j)
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2011-05-08 18:52:54 +00:00
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bytestream_put_byte(buf, *(this_line + i*s->pixel_size + j) ^ 0xff);
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} else {
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bytestream_put_buffer(buf, this_line + i*s->pixel_size, s->pixel_size);
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|
}
|
2007-07-02 07:06:28 +00:00
|
|
|
i -= rlecode;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
bytestream_put_byte(buf, -1); // end RLE line
|
|
|
|
}
|
|
|
|
|
2010-06-30 15:38:06 +00:00
|
|
|
/** Encode frame including header */
|
2012-02-12 08:32:40 +00:00
|
|
|
static int encode_frame(QtrleEncContext *s, const AVFrame *p, uint8_t *buf)
|
2007-07-02 07:06:28 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int start_line = 0;
|
|
|
|
int end_line = s->avctx->height;
|
|
|
|
uint8_t *orig_buf = buf;
|
|
|
|
|
|
|
|
if (!s->frame.key_frame) {
|
2011-05-08 18:52:54 +00:00
|
|
|
unsigned line_size = s->logical_width * s->pixel_size;
|
2007-07-02 07:06:28 +00:00
|
|
|
for (start_line = 0; start_line < s->avctx->height; start_line++)
|
|
|
|
if (memcmp(p->data[0] + start_line*p->linesize[0],
|
2009-05-23 05:55:29 +00:00
|
|
|
s->previous_frame.data[0] + start_line*s->previous_frame.linesize[0],
|
|
|
|
line_size))
|
2007-07-02 07:06:28 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
for (end_line=s->avctx->height; end_line > start_line; end_line--)
|
|
|
|
if (memcmp(p->data[0] + (end_line - 1)*p->linesize[0],
|
2009-05-23 05:55:29 +00:00
|
|
|
s->previous_frame.data[0] + (end_line - 1)*s->previous_frame.linesize[0],
|
|
|
|
line_size))
|
2007-07-02 07:06:28 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
bytestream_put_be32(&buf, 0); // CHUNK SIZE, patched later
|
|
|
|
|
2008-01-31 00:50:21 +00:00
|
|
|
if ((start_line == 0 && end_line == s->avctx->height) || start_line == s->avctx->height)
|
2007-07-02 07:06:28 +00:00
|
|
|
bytestream_put_be16(&buf, 0); // header
|
|
|
|
else {
|
|
|
|
bytestream_put_be16(&buf, 8); // header
|
|
|
|
bytestream_put_be16(&buf, start_line); // starting line
|
|
|
|
bytestream_put_be16(&buf, 0); // unknown
|
|
|
|
bytestream_put_be16(&buf, end_line - start_line); // lines to update
|
|
|
|
bytestream_put_be16(&buf, 0); // unknown
|
|
|
|
}
|
|
|
|
for (i = start_line; i < end_line; i++)
|
|
|
|
qtrle_encode_line(s, p, i, &buf);
|
|
|
|
|
|
|
|
bytestream_put_byte(&buf, 0); // zero skip code = frame finished
|
|
|
|
AV_WB32(orig_buf, buf - orig_buf); // patch the chunk size
|
|
|
|
return buf - orig_buf;
|
|
|
|
}
|
|
|
|
|
2012-02-12 08:32:40 +00:00
|
|
|
static int qtrle_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
|
|
const AVFrame *pict, int *got_packet)
|
2007-07-02 07:06:28 +00:00
|
|
|
{
|
|
|
|
QtrleEncContext * const s = avctx->priv_data;
|
|
|
|
AVFrame * const p = &s->frame;
|
2012-02-12 08:32:40 +00:00
|
|
|
int ret;
|
2007-07-02 07:06:28 +00:00
|
|
|
|
|
|
|
*p = *pict;
|
|
|
|
|
2012-03-22 20:22:39 +00:00
|
|
|
if ((ret = ff_alloc_packet2(avctx, pkt, s->max_buf_size)) < 0)
|
2012-02-12 08:32:40 +00:00
|
|
|
return ret;
|
2007-07-02 07:06:28 +00:00
|
|
|
|
|
|
|
if (avctx->gop_size == 0 || (s->avctx->frame_number % avctx->gop_size) == 0) {
|
|
|
|
/* I-Frame */
|
2011-04-27 23:40:44 +00:00
|
|
|
p->pict_type = AV_PICTURE_TYPE_I;
|
2007-07-02 07:06:28 +00:00
|
|
|
p->key_frame = 1;
|
|
|
|
} else {
|
|
|
|
/* P-Frame */
|
2011-04-27 23:40:44 +00:00
|
|
|
p->pict_type = AV_PICTURE_TYPE_P;
|
2007-07-02 07:06:28 +00:00
|
|
|
p->key_frame = 0;
|
|
|
|
}
|
|
|
|
|
2012-02-12 08:32:40 +00:00
|
|
|
pkt->size = encode_frame(s, pict, pkt->data);
|
2007-07-02 07:06:28 +00:00
|
|
|
|
|
|
|
/* save the current frame */
|
|
|
|
av_picture_copy(&s->previous_frame, (AVPicture *)p, avctx->pix_fmt, avctx->width, avctx->height);
|
2012-02-12 08:32:40 +00:00
|
|
|
|
|
|
|
if (p->key_frame)
|
|
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
*got_packet = 1;
|
|
|
|
|
|
|
|
return 0;
|
2007-07-02 07:06:28 +00:00
|
|
|
}
|
|
|
|
|
2008-03-21 03:11:20 +00:00
|
|
|
static av_cold int qtrle_encode_end(AVCodecContext *avctx)
|
2007-07-02 07:06:28 +00:00
|
|
|
{
|
|
|
|
QtrleEncContext *s = avctx->priv_data;
|
|
|
|
|
|
|
|
avpicture_free(&s->previous_frame);
|
|
|
|
av_free(s->rlecode_table);
|
|
|
|
av_free(s->length_table);
|
|
|
|
av_free(s->skip_table);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodec ff_qtrle_encoder = {
|
2011-07-17 10:54:31 +00:00
|
|
|
.name = "qtrle",
|
2013-10-03 20:57:53 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
|
2011-07-17 10:54:31 +00:00
|
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
2012-08-05 09:11:04 +00:00
|
|
|
.id = AV_CODEC_ID_QTRLE,
|
2011-07-17 10:54:31 +00:00
|
|
|
.priv_data_size = sizeof(QtrleEncContext),
|
|
|
|
.init = qtrle_encode_init,
|
2012-02-12 08:32:40 +00:00
|
|
|
.encode2 = qtrle_encode_frame,
|
2011-07-17 10:54:31 +00:00
|
|
|
.close = qtrle_encode_end,
|
2012-10-06 10:10:34 +00:00
|
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
2012-10-08 18:54:00 +00:00
|
|
|
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGB555BE, AV_PIX_FMT_ARGB, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
|
2012-04-06 16:19:39 +00:00
|
|
|
},
|
2007-07-02 07:06:28 +00:00
|
|
|
};
|