mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 12:38:25 -05:00
686 lines
21 KiB
C
Executable File
686 lines
21 KiB
C
Executable File
/*
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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 "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "bswapdsp.h"
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#include "bytestream.h"
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#include "put_bits.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(&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, subsampled_height;
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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_GBRP:
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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_GBRAP:
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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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avctx->bits_per_coded_sample = 32;
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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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if (avctx->colorspace == AVCOL_SPC_BT709)
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avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
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else
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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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if (avctx->colorspace == AVCOL_SPC_BT709)
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avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
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else
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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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case AV_PIX_FMT_YUV444P:
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c->planes = 3;
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if (avctx->colorspace == AVCOL_SPC_BT709)
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avctx->codec_tag = MKTAG('U', 'L', 'H', '4');
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else
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avctx->codec_tag = MKTAG('U', 'L', 'Y', '4');
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original_format = UTVIDEO_444;
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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_bswapdsp_init(&c->bdsp);
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ff_llvidencdsp_init(&c->llvidencdsp);
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#if FF_API_PRIVATE_OPT
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FF_DISABLE_DEPRECATION_WARNINGS
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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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if (avctx->prediction_method)
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c->frame_pred = ff_ut_pred_order[avctx->prediction_method];
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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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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/*
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* Check the asked slice count for obviously invalid
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* values (> 256 or negative).
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*/
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if (avctx->slices > 256 || avctx->slices < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"Slice count %d is not supported in Ut Video (theoretical range is 0-256).\n",
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avctx->slices);
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return AVERROR(EINVAL);
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}
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/* Check that the slice count is not larger than the subsampled height */
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subsampled_height = avctx->height >> av_pix_fmt_desc_get(avctx->pix_fmt)->log2_chroma_h;
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if (avctx->slices > subsampled_height) {
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av_log(avctx, AV_LOG_ERROR,
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"Slice count %d is larger than the subsampling-applied height %d.\n",
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avctx->slices, subsampled_height);
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return AVERROR(EINVAL);
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}
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/* extradata size is 4 * 32 bits */
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avctx->extradata_size = 16;
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avctx->extradata = av_mallocz(avctx->extradata_size +
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AV_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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AV_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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* By default uses multiple slices depending on the subsampled height.
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* This enables multithreading in the official decoder.
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*/
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if (!avctx->slices) {
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c->slices = subsampled_height / 120;
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if (!c->slices)
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c->slices = 1;
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else if (c->slices > 256)
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c->slices = 256;
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} else {
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c->slices = avctx->slices;
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}
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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], ptrdiff_t dst_stride,
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uint8_t *const src[4], int planes, const int stride[4],
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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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const uint8_t *sg = src[0];
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const uint8_t *sb = src[1];
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const uint8_t *sr = src[2];
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const uint8_t *sa = src[3];
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unsigned int g;
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for (j = 0; j < height; j++) {
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if (planes == 3) {
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for (i = 0; i < width; i++) {
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g = sg[i];
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dst[0][k] = g;
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g += 0x80;
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dst[1][k] = sb[i] - g;
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dst[2][k] = sr[i] - g;
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k++;
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}
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} else {
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for (i = 0; i < width; i++) {
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g = sg[i];
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dst[0][k] = g;
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g += 0x80;
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dst[1][k] = sb[i] - g;
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dst[2][k] = sr[i] - g;
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dst[3][k] = sa[i];
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k++;
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}
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sa += stride[3];
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}
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k += dst_stride - width;
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sg += stride[0];
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sb += stride[1];
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sr += stride[2];
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}
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}
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#undef A
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#undef B
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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,
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ptrdiff_t stride, 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->llvidencdsp.sub_median_pred(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 32-bit 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, ptrdiff_t stride, int plane_no,
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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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const int cmask = ~(!plane_no && avctx->pix_fmt == AV_PIX_FMT_YUV420P);
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int i, sstart, send = 0;
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int symbol;
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int ret;
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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 & cmask;
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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 & cmask;
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c->llvidencdsp.sub_left_predict(dst + sstart * width, src + sstart * stride, 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 & cmask;
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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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if ((ret = ff_huff_gen_len_table(lengths, counts, 256, 1)) < 0)
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return ret;
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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 & cmask;
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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 * height + 4, 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->bdsp.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 */
|
|
bytestream2_seek_p(pb, 4 * (c->slices - i - 1) +
|
|
offset - slice_len, SEEK_CUR);
|
|
|
|
/* Write the slices' data into the output packet */
|
|
bytestream2_put_buffer(pb, c->slice_bits, slice_len);
|
|
|
|
/* Seek back to the slice offsets */
|
|
bytestream2_seek_p(pb, -4 * (c->slices - i - 1) - offset,
|
|
SEEK_CUR);
|
|
|
|
slice_len = offset;
|
|
}
|
|
|
|
/* And at the end seek to the end of written slice(s) */
|
|
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, 0);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dst = pkt->data;
|
|
|
|
bytestream2_init_writer(&pb, dst, pkt->size);
|
|
|
|
av_fast_padded_malloc(&c->slice_bits, &c->slice_bits_size, width * height + 4);
|
|
|
|
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_GBRAP || avctx->pix_fmt == AV_PIX_FMT_GBRP)
|
|
mangle_rgb_planes(c->slice_buffer, c->slice_stride, pic->data,
|
|
c->planes, pic->linesize, width, height);
|
|
|
|
/* Deal with the planes */
|
|
switch (avctx->pix_fmt) {
|
|
case AV_PIX_FMT_GBRP:
|
|
case AV_PIX_FMT_GBRAP:
|
|
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, i,
|
|
width, height, &pb);
|
|
|
|
if (ret) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error encoding plane %d.\n", i);
|
|
return ret;
|
|
}
|
|
}
|
|
break;
|
|
case AV_PIX_FMT_YUV444P:
|
|
for (i = 0; i < c->planes; i++) {
|
|
ret = encode_plane(avctx, pic->data[i], c->slice_buffer[0],
|
|
pic->linesize[i], i, 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], 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], 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 32-bit 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.
|
|
*/
|
|
#if FF_API_CODED_FRAME
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
avctx->coded_frame->key_frame = 1;
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
pkt->size = bytestream2_tell_p(&pb);
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
|
|
/* Packet should be done */
|
|
*got_packet = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(UtvideoContext, x)
|
|
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
|
|
static const AVOption options[] = {
|
|
{ "pred", "Prediction method", OFFSET(frame_pred), AV_OPT_TYPE_INT, { .i64 = PRED_LEFT }, PRED_NONE, PRED_MEDIAN, VE, "pred" },
|
|
{ "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_NONE }, INT_MIN, INT_MAX, VE, "pred" },
|
|
{ "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_LEFT }, INT_MIN, INT_MAX, VE, "pred" },
|
|
{ "gradient", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_GRADIENT }, INT_MIN, INT_MAX, VE, "pred" },
|
|
{ "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRED_MEDIAN }, INT_MIN, INT_MAX, VE, "pred" },
|
|
|
|
{ NULL},
|
|
};
|
|
|
|
static const AVClass utvideo_class = {
|
|
.class_name = "utvideo",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
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),
|
|
.priv_class = &utvideo_class,
|
|
.init = utvideo_encode_init,
|
|
.encode2 = utvideo_encode_frame,
|
|
.close = utvideo_encode_close,
|
|
.capabilities = AV_CODEC_CAP_FRAME_THREADS,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE
|
|
},
|
|
};
|