diff options
author | Mike Melanson <mike@multimedia.cx> | 2004-09-28 07:09:49 +0400 |
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committer | Mike Melanson <mike@multimedia.cx> | 2004-09-28 07:09:49 +0400 |
commit | d08d7142fd279cf30f35bdef9b982ea47d65c535 (patch) | |
tree | c59940142be72b92262e88ba4c2e5e3b8716e5da /libavcodec/qdrw.c | |
parent | 98772cbf7be46ac50ee12da805c1ed923e02813d (diff) |
support for Sierra Online audio files and Apple QuickDraw codec,
courtesy of Konstantin Shishkov
Originally committed as revision 3529 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/qdrw.c')
-rw-r--r-- | libavcodec/qdrw.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/libavcodec/qdrw.c b/libavcodec/qdrw.c new file mode 100644 index 0000000000..0adb5f49a1 --- /dev/null +++ b/libavcodec/qdrw.c @@ -0,0 +1,153 @@ +/* + * QuickDraw (qdrw) codec + * Copyright (c) 2004 Konstantin Shishkov + * + * This library 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. + * + * This library 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 + * + */ + +/** + * @file qdrw.c + * Apple QuickDraw codec. + */ + +#include "avcodec.h" +#include "mpegvideo.h" + +typedef struct QdrawContext{ + AVCodecContext *avctx; + AVFrame pic; + uint8_t palette[256*3]; +} QdrawContext; + +static int decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + uint8_t *buf, int buf_size) +{ + QdrawContext * const a = avctx->priv_data; + AVFrame * const p= (AVFrame*)&a->pic; + uint8_t* outdata; + int colors; + int i; + + /* special case for last picture */ + if (buf_size == 0) { + return 0; + } + + if(p->data[0]) + avctx->release_buffer(avctx, p); + + p->reference= 0; + if(avctx->get_buffer(avctx, p) < 0){ + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + p->pict_type= I_TYPE; + p->key_frame= 1; + + outdata = a->pic.data[0]; + + buf += 0x68; /* jump to palette */ + colors = BE_32(buf); + buf += 4; + + if(colors < 0 || colors > 256) { + av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); + return -1; + } + + for (i = 0; i <= colors; i++) { + int idx; + idx = BE_16(buf); /* color index */ + buf += 2; + + a->palette[idx * 3 + 0] = *buf++; + buf++; + a->palette[idx * 3 + 1] = *buf++; + buf++; + a->palette[idx * 3 + 2] = *buf++; + buf++; + } + + if (colors) + a->pic.palette_has_changed = 1; + + buf += 18; /* skip unneeded data */ + for (i = 0; i < avctx->height; i++) { + int size, left, code, pix; + uint8_t *next; + uint8_t *out; + int tsize = 0; + + /* decode line */ + out = outdata; + size = BE_16(buf); /* size of packed line */ + buf += 2; + left = size; + next = buf + size; + while (left > 0) { + code = *buf++; + if (code & 0x80 ) { /* run */ + int i; + pix = *buf++; + for (i = 0; i < 257 - code; i++) { + *out++ = a->palette[pix * 3 + 0]; + *out++ = a->palette[pix * 3 + 1]; + *out++ = a->palette[pix * 3 + 2]; + } + tsize += 257 - code; + left -= 2; + } else { /* copy */ + int i, pix; + for (i = 0; i <= code; i++) { + pix = *buf++; + *out++ = a->palette[pix * 3 + 0]; + *out++ = a->palette[pix * 3 + 1]; + *out++ = a->palette[pix * 3 + 2]; + } + left -= 2 + code; + tsize += code + 1; + } + } + buf = next; + outdata += a->pic.linesize[0]; + } + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = a->pic; + + return buf_size; +} + +static int decode_init(AVCodecContext *avctx){ +// QdrawContext * const a = avctx->priv_data; + + avctx->pix_fmt= PIX_FMT_RGB24; + + return 0; +} + +AVCodec qdraw_decoder = { + "qdraw", + CODEC_TYPE_VIDEO, + CODEC_ID_QDRAW, + sizeof(QdrawContext), + decode_init, + NULL, + NULL, + decode_frame, + CODEC_CAP_DR1, +}; |