3 * Copyright (C) 2005 the ffmpeg project
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * Autodesk RLE Video Decoder by Konstantin Shishkov
34 typedef struct AascContext {
35 AVCodecContext *avctx;
40 static av_cold int aasc_decode_init(AVCodecContext *avctx)
42 AascContext *s = avctx->priv_data;
46 avctx->pix_fmt = AV_PIX_FMT_BGR24;
51 static int aasc_decode_frame(AVCodecContext *avctx,
52 void *data, int *got_frame,
55 const uint8_t *buf = avpkt->data;
56 int buf_size = avpkt->size;
57 AascContext *s = avctx->priv_data;
58 int compr, i, stride, ret;
60 s->frame.reference = 1;
61 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
62 if ((ret = avctx->reget_buffer(avctx, &s->frame)) < 0) {
63 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
72 stride = (avctx->width * 3 + 3) & ~3;
73 for (i = avctx->height - 1; i >= 0; i--) {
74 memcpy(s->frame.data[0] + i * s->frame.linesize[0], buf, avctx->width * 3);
79 bytestream2_init(&s->gb, buf, buf_size);
80 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb);
83 av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
84 return AVERROR_INVALIDDATA;
88 *(AVFrame*)data = s->frame;
90 /* report that the buffer was completely consumed */
94 static av_cold int aasc_decode_end(AVCodecContext *avctx)
96 AascContext *s = avctx->priv_data;
98 /* release the last frame */
100 avctx->release_buffer(avctx, &s->frame);
105 AVCodec ff_aasc_decoder = {
107 .type = AVMEDIA_TYPE_VIDEO,
108 .id = AV_CODEC_ID_AASC,
109 .priv_data_size = sizeof(AascContext),
110 .init = aasc_decode_init,
111 .close = aasc_decode_end,
112 .decode = aasc_decode_frame,
113 .capabilities = CODEC_CAP_DR1,
114 .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),