yading@10: /*
yading@10:  * Copyright (c) 2012 Derek Buitenhuis
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU General Public
yading@10:  * License as published by the Free Software Foundation;
yading@10:  * version 2 of the License.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Known FOURCCs:
yading@10:  *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA)
yading@10:  */
yading@10: 
yading@10: extern "C" {
yading@10: #include "libavutil/avassert.h"
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: }
yading@10: 
yading@10: #include "libutvideo.h"
yading@10: #include "put_bits.h"
yading@10: 
yading@10: static av_cold int utvideo_encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
yading@10:     UtVideoExtra *info;
yading@10:     uint32_t flags, in_format;
yading@10: 
yading@10:     switch (avctx->pix_fmt) {
yading@10:     case AV_PIX_FMT_YUV420P:
yading@10:         in_format = UTVF_YV12;
yading@10:         avctx->bits_per_coded_sample = 12;
yading@10:         avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
yading@10:         break;
yading@10:     case AV_PIX_FMT_YUYV422:
yading@10:         in_format = UTVF_YUYV;
yading@10:         avctx->bits_per_coded_sample = 16;
yading@10:         avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
yading@10:         break;
yading@10:     case AV_PIX_FMT_BGR24:
yading@10:         in_format = UTVF_NFCC_BGR_BU;
yading@10:         avctx->bits_per_coded_sample = 24;
yading@10:         avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
yading@10:         break;
yading@10:     case AV_PIX_FMT_RGB32:
yading@10:         in_format = UTVF_NFCC_BGRA_BU;
yading@10:         avctx->bits_per_coded_sample = 32;
yading@10:         avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
yading@10:         break;
yading@10:     default:
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     /* Check before we alloc anything */
yading@10:     if (avctx->prediction_method != 0 && avctx->prediction_method != 2) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     flags = ((avctx->prediction_method + 1) << 8) | (avctx->thread_count - 1);
yading@10: 
yading@10:     avctx->priv_data = utv;
yading@10:     avctx->coded_frame = avcodec_alloc_frame();
yading@10: 
yading@10:     /* Alloc extradata buffer */
yading@10:     info = (UtVideoExtra *)av_malloc(sizeof(*info));
yading@10: 
yading@10:     if (info == NULL) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
yading@10:         return AVERROR(ENOMEM);
yading@10:     }
yading@10: 
yading@10:     /*
yading@10:      * We use this buffer to hold the data that Ut Video returns,
yading@10:      * since we cannot decode planes separately with it.
yading@10:      */
yading@10:     utv->buf_size = avpicture_get_size(avctx->pix_fmt,
yading@10:                                        avctx->width, avctx->height);
yading@10:     utv->buffer = (uint8_t *)av_malloc(utv->buf_size);
yading@10: 
yading@10:     if (utv->buffer == NULL) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
yading@10:         return AVERROR(ENOMEM);
yading@10:     }
yading@10: 
yading@10:     /*
yading@10:      * Create a Ut Video instance. Since the function wants
yading@10:      * an "interface name" string, pass it the name of the lib.
yading@10:      */
yading@10:     utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
yading@10: 
yading@10:     /* Initialize encoder */
yading@10:     utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
yading@10:                             CBGROSSWIDTH_WINDOWS);
yading@10: 
yading@10:     /* Get extradata from encoder */
yading@10:     avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
yading@10:     utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
yading@10:                                    avctx->width, avctx->height,
yading@10:                                    CBGROSSWIDTH_WINDOWS);
yading@10:     avctx->extradata = (uint8_t *)info;
yading@10: 
yading@10:     /* Set flags */
yading@10:     utv->codec->SetState(&flags, sizeof(flags));
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                                 const AVFrame *pic, int *got_packet)
yading@10: {
yading@10:     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
yading@10:     int w = avctx->width, h = avctx->height;
yading@10:     int ret, rgb_size, i;
yading@10:     bool keyframe;
yading@10:     uint8_t *y, *u, *v;
yading@10:     uint8_t *dst;
yading@10: 
yading@10:     /* Alloc buffer */
yading@10:     if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     dst = pkt->data;
yading@10: 
yading@10:     /* Move input if needed data into Ut Video friendly buffer */
yading@10:     switch (avctx->pix_fmt) {
yading@10:     case AV_PIX_FMT_YUV420P:
yading@10:         y = utv->buffer;
yading@10:         u = y + w * h;
yading@10:         v = u + w * h / 4;
yading@10:         for (i = 0; i < h; i++) {
yading@10:             memcpy(y, pic->data[0] + i * pic->linesize[0], w);
yading@10:             y += w;
yading@10:         }
yading@10:         for (i = 0; i < h / 2; i++) {
yading@10:             memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
yading@10:             memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
yading@10:             u += w >> 1;
yading@10:             v += w >> 1;
yading@10:         }
yading@10:         break;
yading@10:     case AV_PIX_FMT_YUYV422:
yading@10:         for (i = 0; i < h; i++)
yading@10:             memcpy(utv->buffer + i * (w << 1),
yading@10:                    pic->data[0] + i * pic->linesize[0], w << 1);
yading@10:         break;
yading@10:     case AV_PIX_FMT_BGR24:
yading@10:     case AV_PIX_FMT_RGB32:
yading@10:         /* Ut Video takes bottom-up BGR */
yading@10:         rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
yading@10:         for (i = 0; i < h; i++)
yading@10:             memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
yading@10:                    pic->data[0] + i * pic->linesize[0],
yading@10:                    w * rgb_size);
yading@10:         break;
yading@10:     default:
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     /* Encode frame */
yading@10:     pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);
yading@10: 
yading@10:     if (!pkt->size) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10: 
yading@10:     /*
yading@10:      * Ut Video is intra-only and every frame is a keyframe,
yading@10:      * and the API always returns true. In case something
yading@10:      * durastic changes in the future, such as inter support,
yading@10:      * assert that this is true.
yading@10:      */
yading@10:     av_assert2(keyframe == true);
yading@10:     avctx->coded_frame->key_frame = 1;
yading@10:     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
yading@10: 
yading@10:     pkt->flags |= AV_PKT_FLAG_KEY;
yading@10:     *got_packet = 1;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static av_cold int utvideo_encode_close(AVCodecContext *avctx)
yading@10: {
yading@10:     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
yading@10: 
yading@10:     av_freep(&avctx->coded_frame);
yading@10:     av_freep(&avctx->extradata);
yading@10:     av_freep(&utv->buffer);
yading@10: 
yading@10:     utv->codec->EncodeEnd();
yading@10:     CCodec::DeleteInstance(utv->codec);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_libutvideo_encoder = {
yading@10:     "libutvideo",
yading@10:     NULL_IF_CONFIG_SMALL("Ut Video"),
yading@10:     AVMEDIA_TYPE_VIDEO,
yading@10:     AV_CODEC_ID_UTVIDEO,
yading@10:     CODEC_CAP_AUTO_THREADS | CODEC_CAP_LOSSLESS,
yading@10:     NULL, /* supported_framerates */
yading@10:     (const enum AVPixelFormat[]) {
yading@10:         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
yading@10:         AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
yading@10:     },
yading@10:     NULL, /* supported_samplerates */
yading@10:     NULL, /* sample_fmts */
yading@10:     NULL, /* channel_layouts */
yading@10:     0,    /* max_lowres */
yading@10:     NULL, /* priv_class */
yading@10:     NULL, /* profiles */
yading@10:     sizeof(UtVideoContext),
yading@10:     NULL, /* next */
yading@10:     NULL, /* init_thread_copy */
yading@10:     NULL, /* update_thread_context */
yading@10:     NULL, /* defaults */
yading@10:     NULL, /* init_static_data */
yading@10:     utvideo_encode_init,
yading@10:     NULL, /* encode */
yading@10:     utvideo_encode_frame,
yading@10:     NULL, /* decode */
yading@10:     utvideo_encode_close,
yading@10:     NULL, /* flush */
yading@10: };