3 * Copyright (C) 2005 the ffmpeg project
5 * This file is part of FFmpeg.
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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
35 typedef struct AascContext {
36 AVCodecContext *avctx;
40 uint32_t palette[AVPALETTE_COUNT];
44 static av_cold int aasc_decode_init(AVCodecContext *avctx)
46 AascContext *s = avctx->priv_data;
51 switch (avctx->bits_per_coded_sample) {
53 avctx->pix_fmt = AV_PIX_FMT_PAL8;
55 ptr = avctx->extradata;
56 s->palette_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
57 for (i = 0; i < s->palette_size / 4; i++) {
58 s->palette[i] = 0xFFU << 24 | AV_RL32(ptr);
63 avctx->pix_fmt = AV_PIX_FMT_RGB555;
66 avctx->pix_fmt = AV_PIX_FMT_BGR24;
69 av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", avctx->bits_per_coded_sample);
72 avcodec_get_frame_defaults(&s->frame);
77 static int aasc_decode_frame(AVCodecContext *avctx,
78 void *data, int *data_size,
81 const uint8_t *buf = avpkt->data;
82 int buf_size = avpkt->size;
83 AascContext *s = avctx->priv_data;
84 int compr, i, stride, psize;
86 s->frame.reference = 3;
87 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
88 if (avctx->reget_buffer(avctx, &s->frame)) {
89 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
96 psize = avctx->bits_per_coded_sample / 8;
97 switch (avctx->codec_tag) {
98 case MKTAG('A', 'A', 'S', '4'):
99 bytestream2_init(&s->gb, buf - 4, buf_size + 4);
100 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb);
102 case MKTAG('A', 'A', 'S', 'C'):
105 stride = (avctx->width * psize + psize) & ~psize;
106 for(i = avctx->height - 1; i >= 0; i--){
107 if(avctx->width * psize > buf_size){
108 av_log(avctx, AV_LOG_ERROR, "Next line is beyond buffer bounds\n");
111 memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width * psize);
117 bytestream2_init(&s->gb, buf, buf_size);
118 ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, &s->gb);
121 av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
126 av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
130 if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
131 memcpy(s->frame.data[1], s->palette, s->palette_size);
133 *data_size = sizeof(AVFrame);
134 *(AVFrame*)data = s->frame;
136 /* report that the buffer was completely consumed */
140 static av_cold int aasc_decode_end(AVCodecContext *avctx)
142 AascContext *s = avctx->priv_data;
144 /* release the last frame */
145 if (s->frame.data[0])
146 avctx->release_buffer(avctx, &s->frame);
151 AVCodec ff_aasc_decoder = {
153 .type = AVMEDIA_TYPE_VIDEO,
154 .id = AV_CODEC_ID_AASC,
155 .priv_data_size = sizeof(AascContext),
156 .init = aasc_decode_init,
157 .close = aasc_decode_end,
158 .decode = aasc_decode_frame,
159 .capabilities = CODEC_CAP_DR1,
160 .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),