X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fxl.c;h=7286c14fdc0633d29d49dc847e705f03f2e67ef8;hb=11623217e3c9b859daee544e31acdd0821b61039;hp=0f496017d9bcb227fed0f2d829b96b860ac48ece;hpb=ab711b3c8d59671e2f506a9febd030f74fda006b;p=ffmpeg diff --git a/libavcodec/xl.c b/libavcodec/xl.c index 0f496017d9b..7286c14fdc0 100644 --- a/libavcodec/xl.c +++ b/libavcodec/xl.c @@ -2,143 +2,140 @@ * Miro VideoXL codec * Copyright (c) 2004 Konstantin Shishkov * - * This library is free software; you can redistribute it and/or + * 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ - + /** - * @file xl.c + * @file * Miro VideoXL codec. */ - -#include "avcodec.h" -#include "mpegvideo.h" -typedef struct VideoXLContext{ - AVCodecContext *avctx; - AVFrame pic; -} VideoXLContext; +#include "libavutil/common.h" +#include "libavutil/intreadwrite.h" +#include "avcodec.h" +#include "internal.h" -const int xl_table[32] = { +static const int xl_table[32] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15, 20, 25, 34, 46, 64, 82, 94, 103, 108, 113, 116, 119, - 120, 121, 122, 123, 124, 125, 126, 127}; + 120, 121, 122, 123, 124, 125, 126, 127 +}; -static int decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) +static int decode_frame(AVCodecContext *avctx, + void *data, int *got_frame, + AVPacket *avpkt) { - VideoXLContext * const a = avctx->priv_data; - AVFrame * const p= (AVFrame*)&a->pic; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + AVFrame *const p = data; uint8_t *Y, *U, *V; - int i, j; + int i, j, ret; int stride; uint32_t val; - int y0, y1, y2, y3, c0, c1; - - - /* special case for last picture */ - if (buf_size == 0) { - return 0; + int y0, y1, y2, y3 = 0, c0 = 0, c1 = 0; + + if (avctx->width % 4) { + av_log(avctx, AV_LOG_ERROR, "Width not a multiple of 4.\n"); + return AVERROR_INVALIDDATA; } - if(p->data[0]) - avctx->release_buffer(avctx, p); + if (buf_size < avctx->width * avctx->height) { + av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); + return AVERROR_INVALIDDATA; + } - p->reference = 0; - if(avctx->get_buffer(avctx, p) < 0){ + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; + return ret; } - p->pict_type= I_TYPE; - p->key_frame= 1; + p->pict_type = AV_PICTURE_TYPE_I; + p->key_frame = 1; + + Y = p->data[0]; + U = p->data[1]; + V = p->data[2]; - Y = a->pic.data[0]; - U = a->pic.data[1]; - V = a->pic.data[2]; - stride = avctx->width - 4; + for (i = 0; i < avctx->height; i++) { /* lines are stored in reversed order */ buf += stride; - + for (j = 0; j < avctx->width; j += 4) { /* value is stored in LE dword with word swapped */ - val = LE_32(buf); + val = AV_RL32(buf); buf -= 4; - val = ((val >> 16) & 0xFFFF) | ((val & 0xFFFF) << 16); - - if(!j) + val = ((val >> 16) & 0xFFFF) | ((val & 0xFFFF) << 16); + + if (!j) y0 = (val & 0x1F) << 2; else y0 = y3 + xl_table[val & 0x1F]; val >>= 5; - y1 = y0 + xl_table[val & 0x1F]; + y1 = y0 + xl_table[val & 0x1F]; val >>= 5; - y2 = y1 + xl_table[val & 0x1F]; + y2 = y1 + xl_table[val & 0x1F]; val >>= 6; /* align to word */ - y3 = y2 + xl_table[val & 0x1F]; + y3 = y2 + xl_table[val & 0x1F]; val >>= 5; - if(!j) + if (!j) c0 = (val & 0x1F) << 2; else c0 += xl_table[val & 0x1F]; val >>= 5; - if(!j) + if (!j) c1 = (val & 0x1F) << 2; else c1 += xl_table[val & 0x1F]; - + Y[j + 0] = y0 << 1; Y[j + 1] = y1 << 1; Y[j + 2] = y2 << 1; Y[j + 3] = y3 << 1; - + U[j >> 2] = c0 << 1; V[j >> 2] = c1 << 1; } - + buf += avctx->width + 4; - Y += a->pic.linesize[0]; - U += a->pic.linesize[1]; - V += a->pic.linesize[2]; + Y += p->linesize[0]; + U += p->linesize[1]; + V += p->linesize[2]; } - *data_size = sizeof(AVFrame); - *(AVFrame*)data = a->pic; - + *got_frame = 1; + return buf_size; } -static int decode_init(AVCodecContext *avctx){ -// VideoXLContext * const a = avctx->priv_data; - - avctx->pix_fmt= PIX_FMT_YUV411P; +static av_cold int decode_init(AVCodecContext *avctx) +{ + avctx->pix_fmt = AV_PIX_FMT_YUV411P; return 0; } -AVCodec xl_decoder = { - "xl", - CODEC_TYPE_VIDEO, - CODEC_ID_VIXL, - sizeof(VideoXLContext), - decode_init, - NULL, - NULL, - decode_frame, - CODEC_CAP_DR1, +AVCodec ff_xl_decoder = { + .name = "xl", + .long_name = NULL_IF_CONFIG_SMALL("Miro VideoXL"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_VIXL, + .init = decode_init, + .decode = decode_frame, + .capabilities = AV_CODEC_CAP_DR1, };