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_RGB555LE;
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);
73 s->frame = av_frame_alloc();
75 return AVERROR(ENOMEM);
80 static int aasc_decode_frame(AVCodecContext *avctx,
81 void *data, int *got_frame,
84 const uint8_t *buf = avpkt->data;
85 int buf_size = avpkt->size;
86 AascContext *s = avctx->priv_data;
87 int compr, i, stride, psize, ret;
90 av_log(avctx, AV_LOG_ERROR, "frame too short\n");
91 return AVERROR_INVALIDDATA;
94 if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
100 psize = avctx->bits_per_coded_sample / 8;
101 switch (avctx->codec_tag) {
102 case MKTAG('A', 'A', 'S', '4'):
103 bytestream2_init(&s->gb, buf - 4, buf_size + 4);
104 ff_msrle_decode(avctx, s->frame, 8, &s->gb);
106 case MKTAG('A', 'A', 'S', 'C'):
109 stride = (avctx->width * psize + psize) & ~psize;
110 if (buf_size < stride * avctx->height)
111 return AVERROR_INVALIDDATA;
112 for (i = avctx->height - 1; i >= 0; i--) {
113 memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * psize);
119 bytestream2_init(&s->gb, buf, buf_size);
120 ff_msrle_decode(avctx, s->frame, 8, &s->gb);
123 av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
124 return AVERROR_INVALIDDATA;
128 av_log(avctx, AV_LOG_ERROR, "Unknown FourCC: %X\n", avctx->codec_tag);
132 if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
133 memcpy(s->frame->data[1], s->palette, s->palette_size);
136 if ((ret = av_frame_ref(data, s->frame)) < 0)
139 /* report that the buffer was completely consumed */
143 static av_cold int aasc_decode_end(AVCodecContext *avctx)
145 AascContext *s = avctx->priv_data;
147 av_frame_free(&s->frame);
152 AVCodec ff_aasc_decoder = {
154 .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
155 .type = AVMEDIA_TYPE_VIDEO,
156 .id = AV_CODEC_ID_AASC,
157 .priv_data_size = sizeof(AascContext),
158 .init = aasc_decode_init,
159 .close = aasc_decode_end,
160 .decode = aasc_decode_frame,
161 .capabilities = AV_CODEC_CAP_DR1,
162 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,