/* * V210 decoder * * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at> * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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" #include "libavutil/bswap.h" #include "libavutil/internal.h" #include "libavutil/mem.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 AVERROR_INVALIDDATA; } avctx->pix_fmt = AV_PIX_FMT_YUV422P10; avctx->bits_per_raw_sample = 10; return 0; } static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { int h, w, ret; AVFrame *pic = data; 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 (avpkt->size < stride * avctx->height) { av_log(avctx, AV_LOG_ERROR, "packet too small\n"); return AVERROR_INVALIDDATA; } if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) return ret; y = (uint16_t*)pic->data[0]; u = (uint16_t*)pic->data[1]; v = (uint16_t*)pic->data[2]; pic->pict_type = AV_PICTURE_TYPE_I; pic->key_frame = 1; #define READ_PIXELS(a, b, c) \ do { \ val = av_le2ne32(*src++); \ *a++ = val & 0x3FF; \ *b++ = (val >> 10) & 0x3FF; \ *c++ = (val >> 20) & 0x3FF; \ } while (0) for (h = 0; h < avctx->height; h++) { const uint32_t *src = (const uint32_t*)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 = av_le2ne32(*src++); *y++ = val & 0x3FF; } if (w < avctx->width - 3) { *u++ = (val >> 10) & 0x3FF; *y++ = (val >> 20) & 0x3FF; val = av_le2ne32(*src++); *v++ = val & 0x3FF; *y++ = (val >> 10) & 0x3FF; } 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; } *got_frame = 1; return avpkt->size; } AVCodec ff_v210_decoder = { .name = "v210", .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_V210, .init = decode_init, .decode = decode_frame, .capabilities = CODEC_CAP_DR1, };