diff options
Diffstat (limited to 'libavcodec/y41penc.c')
-rw-r--r-- | libavcodec/y41penc.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libavcodec/y41penc.c b/libavcodec/y41penc.c new file mode 100644 index 0000000000..e5905cf6e9 --- /dev/null +++ b/libavcodec/y41penc.c @@ -0,0 +1,102 @@ +/* + * y41p encoder + * + * Copyright (c) 2012 Paul B Mahol + * + * 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" + +static av_cold int y41p_encode_init(AVCodecContext *avctx) +{ + if (avctx->width & 7) { + av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n"); + return AVERROR_INVALIDDATA; + } + + avctx->coded_frame = avcodec_alloc_frame(); + avctx->bits_per_coded_sample = 12; + + if (!avctx->coded_frame) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); + return AVERROR(ENOMEM); + } + + return 0; +} + +static int y41p_encode_frame(AVCodecContext *avctx, uint8_t *buf, + int buf_size, void *data) +{ + AVFrame *pic = data; + uint8_t *dst = buf; + uint8_t *y, *u, *v; + int i, j; + + if (buf_size < avctx->width * avctx->height * 1.5) { + av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n"); + return AVERROR(ENOMEM); + } + + avctx->coded_frame->reference = 0; + avctx->coded_frame->key_frame = 1; + avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; + + for (i = avctx->height - 1; i >= 0; i--) { + y = &pic->data[0][i * pic->linesize[0]]; + u = &pic->data[1][i * pic->linesize[1]]; + v = &pic->data[2][i * pic->linesize[2]]; + for (j = 0; j < avctx->width; j += 8) { + *(dst++) = *(u++); + *(dst++) = *(y++); + *(dst++) = *(v++); + *(dst++) = *(y++); + + *(dst++) = *(u++); + *(dst++) = *(y++); + *(dst++) = *(v++); + *(dst++) = *(y++); + + *(dst++) = *(y++); + *(dst++) = *(y++); + *(dst++) = *(y++); + *(dst++) = *(y++); + } + } + + return avctx->width * avctx->height * 1.5; +} + +static av_cold int y41p_encode_close(AVCodecContext *avctx) +{ + av_freep(&avctx->coded_frame); + + return 0; +} + +AVCodec ff_y41p_encoder = { + .name = "y41p", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_Y41P, + .init = y41p_encode_init, + .encode = y41p_encode_frame, + .close = y41p_encode_close, + .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P, + PIX_FMT_NONE }, + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"), +}; |