From ca0bb1c49cfa55dbe5acd8dda5e71252d31147dd Mon Sep 17 00:00:00 2001 From: Baptiste Coudurier Date: Tue, 12 May 2009 19:56:48 +0000 Subject: V210 Uncompressed 4:2:2 10-bit encoder and decoder Originally committed as revision 18801 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/v210dec.c | 132 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 132 insertions(+) create mode 100644 libavcodec/v210dec.c (limited to 'libavcodec/v210dec.c') diff --git a/libavcodec/v210dec.c b/libavcodec/v210dec.c new file mode 100644 index 0000000000..da23ec43b9 --- /dev/null +++ b/libavcodec/v210dec.c @@ -0,0 +1,132 @@ +/* + * V210 decoder + * + * Copyright (C) 2009 Michael Niedermayer + * Copyright (c) 2009 Baptiste Coudurier + * + * 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 "libavutil/bswap.h" + +static av_cold int decode_init(AVCodecContext *avctx) +{ + if (avctx->width & 1) { + av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n"); + return -1; + } + if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) + return -1; + avctx->pix_fmt = PIX_FMT_YUV422P16; + avctx->bits_per_raw_sample = 10; + + avctx->coded_frame = avcodec_alloc_frame(); + + return 0; +} + +static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) +{ + int h, w; + AVFrame *pic = avctx->coded_frame; + const uint8_t *psrc = avpkt->data; + uint16_t *y, *u, *v; + int aligned_width = ((avctx->width + 47) / 48) * 48; + int stride = aligned_width * 8 / 3; + + if (pic->data[0]) + avctx->release_buffer(avctx, pic); + + if (avpkt->size < stride * avctx->height) { + av_log(avctx, AV_LOG_ERROR, "packet too small\n"); + return -1; + } + + pic->reference = 0; + if (avctx->get_buffer(avctx, pic) < 0) + return -1; + + y = pic->data[0]; + u = pic->data[1]; + v = pic->data[2]; + pic->pict_type = FF_I_TYPE; + pic->key_frame = 1; + +#define READ_PIXELS(a, b, c) \ + do { \ + val = le2me_32(*src++); \ + *a++ = val << 6; \ + *b++ = (val >> 4) & 0xFFC0; \ + *c++ = (val >> 14) & 0xFFC0; \ + } while (0); + + for (h = 0; h < avctx->height; h++) { + const uint32_t *src = psrc; + uint32_t val; + for (w = 0; w < avctx->width - 5; w += 6) { + READ_PIXELS(u, y, v); + READ_PIXELS(y, u, y); + READ_PIXELS(v, y, u); + READ_PIXELS(y, v, y); + } + if (w < avctx->width - 1) { + READ_PIXELS(u, y, v); + + val = le2me_32(*src++); + *y++ = val << 6; + } + if (w < avctx->width - 3) { + *u++ = (val >> 4) & 0xFFC0; + *y++ = (val >> 14) & 0xFFC0; + + val = le2me_32(*src++); + *v++ = val << 6; + *y++ = (val >> 4) & 0xFFC0; + } + + psrc += stride; + y += pic->linesize[0]/2 - avctx->width; + u += pic->linesize[1]/2 - avctx->width/2; + v += pic->linesize[2]/2 - avctx->width/2; + } + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = *avctx->coded_frame; + + return avpkt->size; +} + +static av_cold int decode_close(AVCodecContext *avctx) +{ + av_freep(&avctx->coded_frame); + + return 0; +} + +AVCodec v210_decoder = { + "v210", + CODEC_TYPE_VIDEO, + CODEC_ID_V210, + 0, + decode_init, + NULL, + decode_close, + decode_frame, + CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), +}; -- cgit v1.2.3