diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/bmp.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/bmp.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/contrib/ffmpeg/libavcodec/bmp.c b/contrib/ffmpeg/libavcodec/bmp.c deleted file mode 100644 index d1cfdce6d..000000000 --- a/contrib/ffmpeg/libavcodec/bmp.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * BMP image format decoder - * Copyright (c) 2005 Mans Rullgard - * - * 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 - */ - -#include "avcodec.h" -#include "bytestream.h" -#include "bmp.h" - -static int bmp_decode_init(AVCodecContext *avctx){ - BMPContext *s = avctx->priv_data; - - avcodec_get_frame_defaults((AVFrame*)&s->picture); - avctx->coded_frame = (AVFrame*)&s->picture; - - return 0; -} - -static int bmp_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - BMPContext *s = avctx->priv_data; - AVFrame *picture = data; - AVFrame *p = &s->picture; - unsigned int fsize, hsize; - int width, height; - unsigned int depth; - BiCompression comp; - unsigned int ihsize; - int i, j, n, linesize; - uint32_t rgb[3]; - uint8_t *ptr; - int dsize; - uint8_t *buf0 = buf; - - if(buf_size < 14){ - av_log(avctx, AV_LOG_ERROR, "buf size too small (%d)\n", buf_size); - return -1; - } - - if(bytestream_get_byte(&buf) != 'B' || - bytestream_get_byte(&buf) != 'M') { - av_log(avctx, AV_LOG_ERROR, "bad magic number\n"); - return -1; - } - - fsize = bytestream_get_le32(&buf); - if(buf_size < fsize){ - av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n", - buf_size, fsize); - return -1; - } - - buf += 2; /* reserved1 */ - buf += 2; /* reserved2 */ - - hsize = bytestream_get_le32(&buf); /* header size */ - if(fsize <= hsize){ - av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n", - fsize, hsize); - return -1; - } - - ihsize = bytestream_get_le32(&buf); /* more header size */ - if(ihsize + 14 > hsize){ - av_log(avctx, AV_LOG_ERROR, "invalid header size %d\n", hsize); - return -1; - } - - width = bytestream_get_le32(&buf); - height = bytestream_get_le32(&buf); - - if(bytestream_get_le16(&buf) != 1){ /* planes */ - av_log(avctx, AV_LOG_ERROR, "invalid BMP header\n"); - return -1; - } - - depth = bytestream_get_le16(&buf); - - if(ihsize > 16) - comp = bytestream_get_le32(&buf); - else - comp = BMP_RGB; - - if(comp != BMP_RGB && comp != BMP_BITFIELDS){ - av_log(avctx, AV_LOG_ERROR, "BMP coding %d not supported\n", comp); - return -1; - } - - if(comp == BMP_BITFIELDS){ - buf += 20; - rgb[0] = bytestream_get_le32(&buf); - rgb[1] = bytestream_get_le32(&buf); - rgb[2] = bytestream_get_le32(&buf); - } - - avctx->codec_id = CODEC_ID_BMP; - avctx->width = width; - avctx->height = height > 0? height: -height; - - avctx->pix_fmt = PIX_FMT_NONE; - - switch(depth){ - case 32: - if(comp == BMP_BITFIELDS){ - rgb[0] = (rgb[0] >> 15) & 3; - rgb[1] = (rgb[1] >> 15) & 3; - rgb[2] = (rgb[2] >> 15) & 3; - - if(rgb[0] + rgb[1] + rgb[2] != 3 || - rgb[0] == rgb[1] || rgb[0] == rgb[2] || rgb[1] == rgb[2]){ - break; - } - } else { - rgb[0] = 2; - rgb[1] = 1; - rgb[2] = 0; - } - - avctx->pix_fmt = PIX_FMT_BGR24; - break; - case 24: - avctx->pix_fmt = PIX_FMT_BGR24; - break; - case 16: - if(comp == BMP_RGB) - avctx->pix_fmt = PIX_FMT_RGB555; - break; - default: - av_log(avctx, AV_LOG_ERROR, "depth %d not supported\n", depth); - return -1; - } - - if(avctx->pix_fmt == PIX_FMT_NONE){ - av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n"); - return -1; - } - - 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 = FF_I_TYPE; - p->key_frame = 1; - - buf = buf0 + hsize; - dsize = buf_size - hsize; - - /* Line size in file multiple of 4 */ - n = (avctx->width * (depth / 8) + 3) & ~3; - - if(n * avctx->height > dsize){ - av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n", - dsize, n * avctx->height); - return -1; - } - - if(height > 0){ - ptr = p->data[0] + (avctx->height - 1) * p->linesize[0]; - linesize = -p->linesize[0]; - } else { - ptr = p->data[0]; - linesize = p->linesize[0]; - } - - switch(depth){ - case 24: - for(i = 0; i < avctx->height; i++){ - memcpy(ptr, buf, avctx->width*(depth>>3)); - buf += n; - ptr += linesize; - } - break; - case 16: - for(i = 0; i < avctx->height; i++){ - uint16_t *src = (uint16_t *) buf; - uint16_t *dst = (uint16_t *) ptr; - - for(j = 0; j < avctx->width; j++) - *dst++ = le2me_16(*src++); - - buf += n; - ptr += linesize; - } - break; - case 32: - for(i = 0; i < avctx->height; i++){ - uint8_t *src = buf; - uint8_t *dst = ptr; - - for(j = 0; j < avctx->width; j++){ - dst[0] = src[rgb[2]]; - dst[1] = src[rgb[1]]; - dst[2] = src[rgb[0]]; - dst += 3; - src += 4; - } - - buf += n; - ptr += linesize; - } - break; - default: - av_log(avctx, AV_LOG_ERROR, "BMP decoder is broken\n"); - return -1; - } - - *picture = s->picture; - *data_size = sizeof(AVPicture); - - return buf_size; -} - -static int bmp_decode_end(AVCodecContext *avctx) -{ - BMPContext* c = avctx->priv_data; - - if (c->picture.data[0]) - avctx->release_buffer(avctx, &c->picture); - - return 0; -} - -AVCodec bmp_decoder = { - "bmp", - CODEC_TYPE_VIDEO, - CODEC_ID_BMP, - sizeof(BMPContext), - bmp_decode_init, - NULL, - bmp_decode_end, - bmp_decode_frame -}; |