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https://github.com/FFmpeg/FFmpeg.git
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205b8fd078
Allows to get a more realistic total bitrate (and estimated file size) in avi_write_header. Previously a static default value of 200k was assumed. Adds an internal helper function for bitrate guessing. Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* y41p encoder
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*
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* Copyright (c) 2012 Paul B Mahol
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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#include "avcodec.h"
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#include "internal.h"
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static av_cold int y41p_encode_init(AVCodecContext *avctx)
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{
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if (avctx->width & 7) {
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av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
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return AVERROR_INVALIDDATA;
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}
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avctx->bits_per_coded_sample = 12;
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avctx->bit_rate = ff_guess_coded_bitrate(avctx);
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return 0;
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}
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static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pic, int *got_packet)
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{
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uint8_t *dst;
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uint8_t *y, *u, *v;
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int i, j, ret;
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if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5, 0)) < 0)
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return ret;
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dst = pkt->data;
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for (i = avctx->height - 1; i >= 0; i--) {
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y = &pic->data[0][i * pic->linesize[0]];
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u = &pic->data[1][i * pic->linesize[1]];
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v = &pic->data[2][i * pic->linesize[2]];
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for (j = 0; j < avctx->width; j += 8) {
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*(dst++) = *(u++);
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*(dst++) = *(y++);
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*(dst++) = *(v++);
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*(dst++) = *(y++);
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*(dst++) = *(u++);
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*(dst++) = *(y++);
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*(dst++) = *(v++);
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*(dst++) = *(y++);
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*(dst++) = *(y++);
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*(dst++) = *(y++);
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*(dst++) = *(y++);
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*(dst++) = *(y++);
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}
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}
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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 y41p_encode_close(AVCodecContext *avctx)
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{
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return 0;
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}
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AVCodec ff_y41p_encoder = {
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.name = "y41p",
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.long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_Y41P,
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.init = y41p_encode_init,
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.encode2 = y41p_encode_frame,
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.close = y41p_encode_close,
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.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_NONE },
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.capabilities = AV_CODEC_CAP_INTRA_ONLY,
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};
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