mirror of
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ee77140afa
* commit 'b2bed9325dbd6be0da1d91ffed3f513c40274fd2': cosmetics: Group .name and .long_name together in codec/format declarations Conflicts: libavcodec/8svx.c libavcodec/alac.c libavcodec/cljr.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/dpxenc.c libavcodec/dvdec.c libavcodec/dvdsubdec.c libavcodec/dvdsubenc.c libavcodec/ffv1dec.c libavcodec/flacdec.c libavcodec/flvdec.c libavcodec/fraps.c libavcodec/frwu.c libavcodec/g726.c libavcodec/gif.c libavcodec/gifdec.c libavcodec/h261dec.c libavcodec/h263dec.c libavcodec/iff.c libavcodec/imc.c libavcodec/libopencore-amr.c libavcodec/libopenjpegdec.c libavcodec/libopenjpegenc.c libavcodec/libspeexenc.c libavcodec/libvo-amrwbenc.c libavcodec/libvorbisenc.c libavcodec/libvpxenc.c libavcodec/libx264.c libavcodec/libxavs.c libavcodec/libxvid.c libavcodec/ljpegenc.c libavcodec/mjpegbdec.c libavcodec/mjpegdec.c libavcodec/mpeg12dec.c libavcodec/mpeg4videodec.c libavcodec/msmpeg4dec.c libavcodec/pgssubdec.c libavcodec/pngdec.c libavcodec/pngenc.c libavcodec/proresdec_lgpl.c libavcodec/proresenc_kostya.c libavcodec/ra144enc.c libavcodec/rawdec.c libavcodec/rv10.c libavcodec/sp5xdec.c libavcodec/takdec.c libavcodec/tta.c libavcodec/v210dec.c libavcodec/vp6.c libavcodec/wavpack.c libavcodec/xbmenc.c libavcodec/yop.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
611 lines
18 KiB
C
611 lines
18 KiB
C
/*
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* Ut Video encoder
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* Copyright (c) 2012 Jan Ekström
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*
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* This file is part of FFmpeg.
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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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* 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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* 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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/**
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* @file
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* Ut Video encoder
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "bytestream.h"
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#include "put_bits.h"
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#include "dsputil.h"
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#include "mathops.h"
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#include "utvideo.h"
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#include "huffman.h"
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/* Compare huffentry symbols */
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static int huff_cmp_sym(const void *a, const void *b)
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{
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const HuffEntry *aa = a, *bb = b;
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return aa->sym - bb->sym;
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}
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static av_cold int utvideo_encode_close(AVCodecContext *avctx)
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{
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UtvideoContext *c = avctx->priv_data;
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int i;
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av_freep(&avctx->coded_frame);
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av_freep(&c->slice_bits);
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for (i = 0; i < 4; i++)
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av_freep(&c->slice_buffer[i]);
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return 0;
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}
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static av_cold int utvideo_encode_init(AVCodecContext *avctx)
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{
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UtvideoContext *c = avctx->priv_data;
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int i;
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uint32_t original_format;
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c->avctx = avctx;
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c->frame_info_size = 4;
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c->slice_stride = FFALIGN(avctx->width, 32);
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_RGB24:
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c->planes = 3;
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avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
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original_format = UTVIDEO_RGB;
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break;
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case AV_PIX_FMT_RGBA:
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c->planes = 4;
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avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
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original_format = UTVIDEO_RGBA;
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break;
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case AV_PIX_FMT_YUV420P:
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if (avctx->width & 1 || avctx->height & 1) {
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av_log(avctx, AV_LOG_ERROR,
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"4:2:0 video requires even width and height.\n");
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return AVERROR_INVALIDDATA;
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}
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c->planes = 3;
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avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
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original_format = UTVIDEO_420;
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break;
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case AV_PIX_FMT_YUV422P:
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if (avctx->width & 1) {
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av_log(avctx, AV_LOG_ERROR,
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"4:2:2 video requires even width.\n");
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return AVERROR_INVALIDDATA;
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}
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c->planes = 3;
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avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
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original_format = UTVIDEO_422;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unknown pixel format: %d\n",
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avctx->pix_fmt);
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return AVERROR_INVALIDDATA;
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}
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ff_dsputil_init(&c->dsp, avctx);
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/* Check the prediction method, and error out if unsupported */
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if (avctx->prediction_method < 0 || avctx->prediction_method > 4) {
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av_log(avctx, AV_LOG_WARNING,
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"Prediction method %d is not supported in Ut Video.\n",
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avctx->prediction_method);
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return AVERROR_OPTION_NOT_FOUND;
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}
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if (avctx->prediction_method == FF_PRED_PLANE) {
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av_log(avctx, AV_LOG_ERROR,
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"Plane prediction is not supported in Ut Video.\n");
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return AVERROR_OPTION_NOT_FOUND;
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}
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/* Convert from libavcodec prediction type to Ut Video's */
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c->frame_pred = ff_ut_pred_order[avctx->prediction_method];
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if (c->frame_pred == PRED_GRADIENT) {
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av_log(avctx, AV_LOG_ERROR, "Gradient prediction is not supported.\n");
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return AVERROR_OPTION_NOT_FOUND;
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}
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avctx->coded_frame = avcodec_alloc_frame();
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if (!avctx->coded_frame) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
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utvideo_encode_close(avctx);
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return AVERROR(ENOMEM);
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}
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/* extradata size is 4 * 32bit */
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avctx->extradata_size = 16;
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avctx->extradata = av_mallocz(avctx->extradata_size +
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FF_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata.\n");
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utvideo_encode_close(avctx);
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < c->planes; i++) {
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c->slice_buffer[i] = av_malloc(c->slice_stride * (avctx->height + 2) +
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FF_INPUT_BUFFER_PADDING_SIZE);
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if (!c->slice_buffer[i]) {
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av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 1.\n");
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utvideo_encode_close(avctx);
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return AVERROR(ENOMEM);
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}
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}
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/*
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* Set the version of the encoder.
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* Last byte is "implementation ID", which is
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* obtained from the creator of the format.
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* Libavcodec has been assigned with the ID 0xF0.
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*/
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AV_WB32(avctx->extradata, MKTAG(1, 0, 0, 0xF0));
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/*
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* Set the "original format"
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* Not used for anything during decoding.
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*/
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AV_WL32(avctx->extradata + 4, original_format);
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/* Write 4 as the 'frame info size' */
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AV_WL32(avctx->extradata + 8, c->frame_info_size);
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/*
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* Set how many slices are going to be used.
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* Set one slice for now.
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*/
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c->slices = 1;
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/* Set compression mode */
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c->compression = COMP_HUFF;
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/*
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* Set the encoding flags:
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* - Slice count minus 1
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* - Interlaced encoding mode flag, set to zero for now.
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* - Compression mode (none/huff)
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* And write the flags.
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*/
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c->flags = (c->slices - 1) << 24;
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c->flags |= 0 << 11; // bit field to signal interlaced encoding mode
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c->flags |= c->compression;
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AV_WL32(avctx->extradata + 12, c->flags);
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return 0;
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}
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static void mangle_rgb_planes(uint8_t *dst[4], int dst_stride, uint8_t *src,
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int step, int stride, int width, int height)
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{
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int i, j;
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int k = 2 * dst_stride;
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unsigned int g;
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for (j = 0; j < height; j++) {
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if (step == 3) {
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for (i = 0; i < width * step; i += step) {
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g = src[i + 1];
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dst[0][k] = g;
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g += 0x80;
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dst[1][k] = src[i + 2] - g;
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dst[2][k] = src[i + 0] - g;
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k++;
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}
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} else {
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for (i = 0; i < width * step; i += step) {
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g = src[i + 1];
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dst[0][k] = g;
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g += 0x80;
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dst[1][k] = src[i + 2] - g;
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dst[2][k] = src[i + 0] - g;
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dst[3][k] = src[i + 3];
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k++;
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}
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}
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k += dst_stride - width;
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src += stride;
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}
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}
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/* Write data to a plane with left prediction */
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static void left_predict(uint8_t *src, uint8_t *dst, int stride,
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int width, int height)
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{
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int i, j;
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uint8_t prev;
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prev = 0x80; /* Set the initial value */
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for (j = 0; j < height; j++) {
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for (i = 0; i < width; i++) {
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*dst++ = src[i] - prev;
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prev = src[i];
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}
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src += stride;
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}
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}
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/* Write data to a plane with median prediction */
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static void median_predict(UtvideoContext *c, uint8_t *src, uint8_t *dst, int stride,
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int width, int height)
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{
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int i, j;
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int A, B;
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uint8_t prev;
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/* First line uses left neighbour prediction */
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prev = 0x80; /* Set the initial value */
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for (i = 0; i < width; i++) {
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*dst++ = src[i] - prev;
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prev = src[i];
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}
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if (height == 1)
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return;
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src += stride;
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/*
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* Second line uses top prediction for the first sample,
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* and median for the rest.
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*/
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A = B = 0;
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/* Rest of the coded part uses median prediction */
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for (j = 1; j < height; j++) {
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c->dsp.sub_hfyu_median_prediction(dst, src - stride, src, width, &A, &B);
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dst += width;
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src += stride;
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}
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}
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/* Count the usage of values in a plane */
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static void count_usage(uint8_t *src, int width,
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int height, uint64_t *counts)
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{
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int i, j;
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for (j = 0; j < height; j++) {
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for (i = 0; i < width; i++) {
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counts[src[i]]++;
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}
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src += width;
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}
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}
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/* Calculate the actual huffman codes from the code lengths */
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static void calculate_codes(HuffEntry *he)
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{
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int last, i;
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uint32_t code;
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qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len);
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last = 255;
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while (he[last].len == 255 && last)
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last--;
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code = 1;
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for (i = last; i >= 0; i--) {
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he[i].code = code >> (32 - he[i].len);
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code += 0x80000000u >> (he[i].len - 1);
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}
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qsort(he, 256, sizeof(*he), huff_cmp_sym);
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}
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/* Write huffman bit codes to a memory block */
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static int write_huff_codes(uint8_t *src, uint8_t *dst, int dst_size,
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int width, int height, HuffEntry *he)
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{
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PutBitContext pb;
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int i, j;
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int count;
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init_put_bits(&pb, dst, dst_size);
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/* Write the codes */
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for (j = 0; j < height; j++) {
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for (i = 0; i < width; i++)
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put_bits(&pb, he[src[i]].len, he[src[i]].code);
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src += width;
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}
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/* Pad output to a 32bit boundary */
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count = put_bits_count(&pb) & 0x1F;
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if (count)
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put_bits(&pb, 32 - count, 0);
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/* Get the amount of bits written */
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count = put_bits_count(&pb);
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/* Flush the rest with zeroes */
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flush_put_bits(&pb);
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return count;
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}
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static int encode_plane(AVCodecContext *avctx, uint8_t *src,
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uint8_t *dst, int stride,
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int width, int height, PutByteContext *pb)
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{
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UtvideoContext *c = avctx->priv_data;
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uint8_t lengths[256];
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uint64_t counts[256] = { 0 };
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HuffEntry he[256];
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uint32_t offset = 0, slice_len = 0;
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int i, sstart, send = 0;
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int symbol;
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/* Do prediction / make planes */
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switch (c->frame_pred) {
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case PRED_NONE:
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for (i = 0; i < c->slices; i++) {
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sstart = send;
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send = height * (i + 1) / c->slices;
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av_image_copy_plane(dst + sstart * width, width,
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src + sstart * stride, stride,
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width, send - sstart);
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}
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break;
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case PRED_LEFT:
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for (i = 0; i < c->slices; i++) {
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sstart = send;
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send = height * (i + 1) / c->slices;
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left_predict(src + sstart * stride, dst + sstart * width,
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stride, width, send - sstart);
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}
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break;
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case PRED_MEDIAN:
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for (i = 0; i < c->slices; i++) {
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sstart = send;
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send = height * (i + 1) / c->slices;
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median_predict(c, src + sstart * stride, dst + sstart * width,
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stride, width, send - sstart);
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}
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unknown prediction mode: %d\n",
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c->frame_pred);
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return AVERROR_OPTION_NOT_FOUND;
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}
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/* Count the usage of values */
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count_usage(dst, width, height, counts);
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/* Check for a special case where only one symbol was used */
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for (symbol = 0; symbol < 256; symbol++) {
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/* If non-zero count is found, see if it matches width * height */
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if (counts[symbol]) {
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/* Special case if only one symbol was used */
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if (counts[symbol] == width * (int64_t)height) {
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/*
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* Write a zero for the single symbol
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* used in the plane, else 0xFF.
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*/
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for (i = 0; i < 256; i++) {
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if (i == symbol)
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bytestream2_put_byte(pb, 0);
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else
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bytestream2_put_byte(pb, 0xFF);
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}
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/* Write zeroes for lengths */
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for (i = 0; i < c->slices; i++)
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bytestream2_put_le32(pb, 0);
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/* And that's all for that plane folks */
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return 0;
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}
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break;
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}
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}
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/* Calculate huffman lengths */
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ff_huff_gen_len_table(lengths, counts);
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/*
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* Write the plane's header into the output packet:
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* - huffman code lengths (256 bytes)
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* - slice end offsets (gotten from the slice lengths)
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*/
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for (i = 0; i < 256; i++) {
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bytestream2_put_byte(pb, lengths[i]);
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he[i].len = lengths[i];
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he[i].sym = i;
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}
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/* Calculate the huffman codes themselves */
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calculate_codes(he);
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send = 0;
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for (i = 0; i < c->slices; i++) {
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sstart = send;
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send = height * (i + 1) / c->slices;
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/*
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* Write the huffman codes to a buffer,
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* get the offset in bits and convert to bytes.
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*/
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offset += write_huff_codes(dst + sstart * width, c->slice_bits,
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width * (send - sstart), width,
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send - sstart, he) >> 3;
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slice_len = offset - slice_len;
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/* Byteswap the written huffman codes */
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c->dsp.bswap_buf((uint32_t *) c->slice_bits,
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(uint32_t *) c->slice_bits,
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slice_len >> 2);
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/* Write the offset to the stream */
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bytestream2_put_le32(pb, offset);
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/* Seek to the data part of the packet */
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bytestream2_seek_p(pb, 4 * (c->slices - i - 1) +
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offset - slice_len, SEEK_CUR);
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/* Write the slices' data into the output packet */
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bytestream2_put_buffer(pb, c->slice_bits, slice_len);
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/* Seek back to the slice offsets */
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bytestream2_seek_p(pb, -4 * (c->slices - i - 1) - offset,
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SEEK_CUR);
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slice_len = offset;
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}
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/* And at the end seek to the end of written slice(s) */
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bytestream2_seek_p(pb, offset, SEEK_CUR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *pic, int *got_packet)
|
|
{
|
|
UtvideoContext *c = avctx->priv_data;
|
|
PutByteContext pb;
|
|
|
|
uint32_t frame_info;
|
|
|
|
uint8_t *dst;
|
|
|
|
int width = avctx->width, height = avctx->height;
|
|
int i, ret = 0;
|
|
|
|
/* Allocate a new packet if needed, and set it to the pointer dst */
|
|
ret = ff_alloc_packet2(avctx, pkt, (256 + 4 * c->slices + width * height) *
|
|
c->planes + 4);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dst = pkt->data;
|
|
|
|
bytestream2_init_writer(&pb, dst, pkt->size);
|
|
|
|
av_fast_malloc(&c->slice_bits, &c->slice_bits_size,
|
|
width * height + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
|
|
if (!c->slice_bits) {
|
|
av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer 2.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
/* In case of RGB, mangle the planes to Ut Video's format */
|
|
if (avctx->pix_fmt == AV_PIX_FMT_RGBA || avctx->pix_fmt == AV_PIX_FMT_RGB24)
|
|
mangle_rgb_planes(c->slice_buffer, c->slice_stride, pic->data[0],
|
|
c->planes, pic->linesize[0], width, height);
|
|
|
|
/* Deal with the planes */
|
|
switch (avctx->pix_fmt) {
|
|
case AV_PIX_FMT_RGB24:
|
|
case AV_PIX_FMT_RGBA:
|
|
for (i = 0; i < c->planes; i++) {
|
|
ret = encode_plane(avctx, c->slice_buffer[i] + 2 * c->slice_stride,
|
|
c->slice_buffer[i], c->slice_stride,
|
|
width, height, &pb);
|
|
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
|
|
return ret;
|
|
}
|
|
}
|
|
break;
|
|
case AV_PIX_FMT_YUV422P:
|
|
for (i = 0; i < c->planes; i++) {
|
|
ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
|
|
pic->linesize[i], width >> !!i, height, &pb);
|
|
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
|
|
return ret;
|
|
}
|
|
}
|
|
break;
|
|
case AV_PIX_FMT_YUV420P:
|
|
for (i = 0; i < c->planes; i++) {
|
|
ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
|
|
pic->linesize[i], width >> !!i, height >> !!i,
|
|
&pb);
|
|
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
|
|
return ret;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown pixel format: %d\n",
|
|
avctx->pix_fmt);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/*
|
|
* Write frame information (LE 32bit unsigned)
|
|
* into the output packet.
|
|
* Contains the prediction method.
|
|
*/
|
|
frame_info = c->frame_pred << 8;
|
|
bytestream2_put_le32(&pb, frame_info);
|
|
|
|
/*
|
|
* At least currently Ut Video is IDR only.
|
|
* Set flags accordingly.
|
|
*/
|
|
avctx->coded_frame->key_frame = 1;
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
pkt->size = bytestream2_tell_p(&pb);
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
/* Packet should be done */
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_utvideo_encoder = {
|
|
.name = "utvideo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_UTVIDEO,
|
|
.priv_data_size = sizeof(UtvideoContext),
|
|
.init = utvideo_encode_init,
|
|
.encode2 = utvideo_encode_frame,
|
|
.close = utvideo_encode_close,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE
|
|
},
|
|
};
|