diff options
Diffstat (limited to 'libavcodec/yuv4enc.c')
-rw-r--r-- | libavcodec/yuv4enc.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/libavcodec/yuv4enc.c b/libavcodec/yuv4enc.c new file mode 100644 index 0000000..5ce4846 --- /dev/null +++ b/libavcodec/yuv4enc.c @@ -0,0 +1,91 @@ +/* + * libquicktime yuv4 encoder + * + * Copyright (c) 2011 Carl Eugen Hoyos + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "avcodec.h" +#include "internal.h" + +static av_cold int yuv4_encode_init(AVCodecContext *avctx) +{ + avctx->coded_frame = av_frame_alloc(); + + if (!avctx->coded_frame) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); + return AVERROR(ENOMEM); + } + + return 0; +} + +static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, + const AVFrame *pic, int *got_packet) +{ + uint8_t *dst; + uint8_t *y, *u, *v; + int i, j, ret; + + if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0) + return ret; + dst = pkt->data; + + avctx->coded_frame->key_frame = 1; + avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; + + y = pic->data[0]; + u = pic->data[1]; + v = pic->data[2]; + + for (i = 0; i < avctx->height + 1 >> 1; i++) { + for (j = 0; j < avctx->width + 1 >> 1; j++) { + *dst++ = u[j] ^ 0x80; + *dst++ = v[j] ^ 0x80; + *dst++ = y[ 2 * j ]; + *dst++ = y[ 2 * j + 1]; + *dst++ = y[pic->linesize[0] + 2 * j ]; + *dst++ = y[pic->linesize[0] + 2 * j + 1]; + } + y += 2 * pic->linesize[0]; + u += pic->linesize[1]; + v += pic->linesize[2]; + } + + pkt->flags |= AV_PKT_FLAG_KEY; + *got_packet = 1; + return 0; +} + +static av_cold int yuv4_encode_close(AVCodecContext *avctx) +{ + av_frame_free(&avctx->coded_frame); + + return 0; +} + +AVCodec ff_yuv4_encoder = { + .name = "yuv4", + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_YUV4, + .init = yuv4_encode_init, + .encode2 = yuv4_encode_frame, + .close = yuv4_encode_close, + .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, +}; |