diff options
Diffstat (limited to 'ffmpeg1/libavcodec/qdrw.c')
| -rw-r--r-- | ffmpeg1/libavcodec/qdrw.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/qdrw.c b/ffmpeg1/libavcodec/qdrw.c new file mode 100644 index 0000000..6970099 --- /dev/null +++ b/ffmpeg1/libavcodec/qdrw.c @@ -0,0 +1,151 @@ +/* + * QuickDraw (qdrw) codec + * Copyright (c) 2004 Konstantin Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * Apple QuickDraw codec. + */ + +#include "libavutil/common.h" +#include "libavutil/intreadwrite.h" +#include "avcodec.h" +#include "internal.h" + +static int decode_frame(AVCodecContext *avctx, + void *data, int *got_frame, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + const uint8_t *buf_end = avpkt->data + avpkt->size; + int buf_size = avpkt->size; + AVFrame * const p = data; + uint8_t* outdata; + int colors; + int i, ret; + uint32_t *pal; + int r, g, b; + + if ((ret = ff_get_buffer(avctx, p, 0)) < 0) + return ret; + p->pict_type = AV_PICTURE_TYPE_I; + p->key_frame = 1; + + outdata = p->data[0]; + + if (buf_end - buf < 0x68 + 4) + return AVERROR_INVALIDDATA; + buf += 0x68; /* jump to palette */ + colors = AV_RB32(buf); + buf += 4; + + if (colors < 0 || colors > 256) { + av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); + return AVERROR_INVALIDDATA; + } + if (buf_end - buf < (colors + 1) * 8) + return AVERROR_INVALIDDATA; + + pal = (uint32_t*)p->data[1]; + for (i = 0; i <= colors; i++) { + unsigned int idx; + idx = AV_RB16(buf); /* color index */ + buf += 2; + + if (idx > 255) { + av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx); + buf += 6; + continue; + } + r = *buf++; + buf++; + g = *buf++; + buf++; + b = *buf++; + buf++; + pal[idx] = 0xFFU << 24 | r << 16 | g << 8 | b; + } + p->palette_has_changed = 1; + + if (buf_end - buf < 18) + return AVERROR_INVALIDDATA; + buf += 18; /* skip unneeded data */ + for (i = 0; i < avctx->height; i++) { + int size, left, code, pix; + const uint8_t *next; + uint8_t *out; + int tsize = 0; + + /* decode line */ + out = outdata; + size = AV_RB16(buf); /* size of packed line */ + buf += 2; + if (buf_end - buf < size) + return AVERROR_INVALIDDATA; + + left = size; + next = buf + size; + while (left > 0) { + code = *buf++; + if (code & 0x80 ) { /* run */ + pix = *buf++; + if ((out + (257 - code)) > (outdata + p->linesize[0])) + break; + memset(out, pix, 257 - code); + out += 257 - code; + tsize += 257 - code; + left -= 2; + } else { /* copy */ + if ((out + code) > (outdata + p->linesize[0])) + break; + if (buf_end - buf < code + 1) + return AVERROR_INVALIDDATA; + memcpy(out, buf, code + 1); + out += code + 1; + buf += code + 1; + left -= 2 + code; + tsize += code + 1; + } + } + buf = next; + outdata += p->linesize[0]; + } + + *got_frame = 1; + + return buf_size; +} + +static av_cold int decode_init(AVCodecContext *avctx) +{ + avctx->pix_fmt= AV_PIX_FMT_PAL8; + + return 0; +} + +AVCodec ff_qdraw_decoder = { + .name = "qdraw", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_QDRAW, + .init = decode_init, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"), +}; |