251 lines
7.4 KiB
C++
251 lines
7.4 KiB
C++
/*
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* Copyright (c) 2012 Derek Buitenhuis
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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 General Public
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* License as published by the Free Software Foundation;
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* version 2 of the License.
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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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* General Public License for more details.
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*
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* You should have received a copy of the GNU 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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* Known FOURCCs:
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* 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
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* 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
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*/
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extern "C" {
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "internal.h"
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}
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#include "libutvideo.h"
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#include "put_bits.h"
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static av_cold int utvideo_encode_init(AVCodecContext *avctx)
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{
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
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UtVideoExtra *info;
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uint32_t flags, in_format;
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int ret;
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_YUV420P:
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in_format = UTVF_YV12;
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avctx->bits_per_coded_sample = 12;
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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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break;
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case AV_PIX_FMT_YUYV422:
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in_format = UTVF_YUYV;
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avctx->bits_per_coded_sample = 16;
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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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break;
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case AV_PIX_FMT_BGR24:
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in_format = UTVF_NFCC_BGR_BU;
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avctx->bits_per_coded_sample = 24;
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avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
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break;
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case AV_PIX_FMT_RGB32:
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in_format = UTVF_NFCC_BGRA_BU;
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avctx->bits_per_coded_sample = 32;
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avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
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break;
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default:
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return AVERROR(EINVAL);
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}
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/* Check before we alloc anything */
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if (avctx->prediction_method != 0 && avctx->prediction_method != 2) {
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av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
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return AVERROR(EINVAL);
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}
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flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
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avctx->priv_data = utv;
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/* Alloc extradata buffer */
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info = (UtVideoExtra *)av_malloc(sizeof(*info));
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if (!info) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
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return AVERROR(ENOMEM);
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}
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/*
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* We use this buffer to hold the data that Ut Video returns,
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* since we cannot decode planes separately with it.
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*/
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ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
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if (ret < 0) {
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av_free(info);
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return ret;
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}
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utv->buf_size = ret;
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utv->buffer = (uint8_t *)av_malloc(utv->buf_size);
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if (utv->buffer == NULL) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
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av_free(info);
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return AVERROR(ENOMEM);
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}
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/*
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* Create a Ut Video instance. Since the function wants
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* an "interface name" string, pass it the name of the lib.
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*/
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utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
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/* Initialize encoder */
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utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
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CBGROSSWIDTH_WINDOWS);
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/* Get extradata from encoder */
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avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
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utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
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avctx->width, avctx->height,
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CBGROSSWIDTH_WINDOWS);
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avctx->extradata = (uint8_t *)info;
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/* Set flags */
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utv->codec->SetState(&flags, sizeof(flags));
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return 0;
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}
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static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pic, int *got_packet)
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{
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
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int w = avctx->width, h = avctx->height;
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int ret, rgb_size, i;
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bool keyframe;
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uint8_t *y, *u, *v;
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uint8_t *dst;
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/* Alloc buffer */
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if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
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return ret;
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dst = pkt->data;
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/* Move input if needed data into Ut Video friendly buffer */
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_YUV420P:
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y = utv->buffer;
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u = y + w * h;
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v = u + w * h / 4;
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for (i = 0; i < h; i++) {
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memcpy(y, pic->data[0] + i * pic->linesize[0], w);
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y += w;
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}
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for (i = 0; i < h / 2; i++) {
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memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
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memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
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u += w >> 1;
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v += w >> 1;
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}
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break;
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case AV_PIX_FMT_YUYV422:
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for (i = 0; i < h; i++)
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memcpy(utv->buffer + i * (w << 1),
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pic->data[0] + i * pic->linesize[0], w << 1);
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break;
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case AV_PIX_FMT_BGR24:
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case AV_PIX_FMT_RGB32:
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/* Ut Video takes bottom-up BGR */
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rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
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for (i = 0; i < h; i++)
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memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
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pic->data[0] + i * pic->linesize[0],
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w * rgb_size);
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break;
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default:
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return AVERROR(EINVAL);
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}
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/* Encode frame */
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pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
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if (!pkt->size) {
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av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
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return AVERROR_INVALIDDATA;
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}
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/*
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* Ut Video is intra-only and every frame is a keyframe,
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* and the API always returns true. In case something
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* durastic changes in the future, such as inter support,
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* assert that this is true.
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*/
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av_assert2(keyframe == true);
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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static av_cold int utvideo_encode_close(AVCodecContext *avctx)
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{
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
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av_freep(&avctx->extradata);
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av_freep(&utv->buffer);
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utv->codec->EncodeEnd();
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CCodec::DeleteInstance(utv->codec);
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return 0;
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}
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AVCodec ff_libutvideo_encoder = {
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"libutvideo",
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NULL_IF_CONFIG_SMALL("Ut Video"),
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AVMEDIA_TYPE_VIDEO,
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AV_CODEC_ID_UTVIDEO,
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AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_LOSSLESS | AV_CODEC_CAP_INTRA_ONLY,
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NULL, /* supported_framerates */
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(const enum AVPixelFormat[]) {
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
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},
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NULL, /* supported_samplerates */
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NULL, /* sample_fmts */
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NULL, /* channel_layouts */
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0, /* max_lowres */
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NULL, /* priv_class */
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NULL, /* profiles */
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sizeof(UtVideoContext),
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NULL, /* next */
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NULL, /* init_thread_copy */
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NULL, /* update_thread_context */
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NULL, /* defaults */
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NULL, /* init_static_data */
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utvideo_encode_init,
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NULL, /* encode */
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utvideo_encode_frame,
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NULL, /* decode */
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utvideo_encode_close,
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NULL, /* flush */
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};
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