yading@10: /*
yading@10:  * V210 encoder
yading@10:  *
yading@10:  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
yading@10:  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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 Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
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:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser 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: #include "avcodec.h"
yading@10: #include "bytestream.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: static av_cold int encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     if (avctx->width & 1) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     if (avctx->bits_per_raw_sample != 10)
yading@10:         av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
yading@10:                avctx->bits_per_raw_sample);
yading@10: 
yading@10:     avctx->coded_frame = avcodec_alloc_frame();
yading@10:     if (!avctx->coded_frame)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                         const AVFrame *pic, int *got_packet)
yading@10: {
yading@10:     int aligned_width = ((avctx->width + 47) / 48) * 48;
yading@10:     int stride = aligned_width * 8 / 3;
yading@10:     int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
yading@10:     int h, w, ret;
yading@10:     const uint16_t *y = (const uint16_t*)pic->data[0];
yading@10:     const uint16_t *u = (const uint16_t*)pic->data[1];
yading@10:     const uint16_t *v = (const uint16_t*)pic->data[2];
yading@10:     PutByteContext p;
yading@10: 
yading@10:     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->height * stride)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     bytestream2_init_writer(&p, pkt->data, pkt->size);
yading@10: 
yading@10: #define CLIP(v) av_clip(v, 4, 1019)
yading@10: 
yading@10: #define WRITE_PIXELS(a, b, c)           \
yading@10:     do {                                \
yading@10:         val =   CLIP(*a++);             \
yading@10:         val |= (CLIP(*b++) << 10) |     \
yading@10:                (CLIP(*c++) << 20);      \
yading@10:         bytestream2_put_le32u(&p, val); \
yading@10:     } while (0)
yading@10: 
yading@10:     for (h = 0; h < avctx->height; h++) {
yading@10:         uint32_t val;
yading@10:         for (w = 0; w < avctx->width - 5; w += 6) {
yading@10:             WRITE_PIXELS(u, y, v);
yading@10:             WRITE_PIXELS(y, u, y);
yading@10:             WRITE_PIXELS(v, y, u);
yading@10:             WRITE_PIXELS(y, v, y);
yading@10:         }
yading@10:         if (w < avctx->width - 1) {
yading@10:             WRITE_PIXELS(u, y, v);
yading@10: 
yading@10:             val = CLIP(*y++);
yading@10:             if (w == avctx->width - 2)
yading@10:                 bytestream2_put_le32u(&p, val);
yading@10:             if (w < avctx->width - 3) {
yading@10:                 val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
yading@10:                 bytestream2_put_le32u(&p, val);
yading@10: 
yading@10:                 val = CLIP(*v++) | (CLIP(*y++) << 10);
yading@10:                 bytestream2_put_le32u(&p, val);
yading@10:             }
yading@10:         }
yading@10: 
yading@10:         bytestream2_set_buffer(&p, 0, line_padding);
yading@10: 
yading@10:         y += pic->linesize[0] / 2 - avctx->width;
yading@10:         u += pic->linesize[1] / 2 - avctx->width / 2;
yading@10:         v += pic->linesize[2] / 2 - avctx->width / 2;
yading@10:     }
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 encode_close(AVCodecContext *avctx)
yading@10: {
yading@10:     av_freep(&avctx->coded_frame);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: AVCodec ff_v210_encoder = {
yading@10:     .name           = "v210",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_V210,
yading@10:     .init           = encode_init,
yading@10:     .encode2        = encode_frame,
yading@10:     .close          = encode_close,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
yading@10: };