* BMP image format decoder
* Copyright (c) 2005 Mans Rullgard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static int bmp_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
BMPContext *s = avctx->priv_data;
AVFrame *picture = data;
AVFrame *p = &s->picture;
fsize = bytestream_get_le32(&buf);
if(buf_size < fsize){
- av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n",
+ av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d), trying to decode anyway\n",
buf_size, fsize);
- return -1;
+ fsize = buf_size;
}
buf += 2; /* reserved1 */
case 16:
if(comp == BMP_RGB)
avctx->pix_fmt = PIX_FMT_RGB555;
- if(comp == BMP_BITFIELDS)
- avctx->pix_fmt = rgb[1] == 0x07E0 ? PIX_FMT_RGB565 : PIX_FMT_RGB555;
+ else if (comp == BMP_BITFIELDS) {
+ if (rgb[0] == 0xF800 && rgb[1] == 0x07E0 && rgb[2] == 0x001F)
+ avctx->pix_fmt = PIX_FMT_RGB565;
+ else if (rgb[0] == 0x7C00 && rgb[1] == 0x03E0 && rgb[2] == 0x001F)
+ avctx->pix_fmt = PIX_FMT_RGB555;
+ else if (rgb[0] == 0x0F00 && rgb[1] == 0x00F0 && rgb[2] == 0x000F)
+ avctx->pix_fmt = PIX_FMT_RGB444;
+ else {
+ av_log(avctx, AV_LOG_ERROR, "Unknown bitfields %0X %0X %0X\n", rgb[0], rgb[1], rgb[2]);
+ return AVERROR(EINVAL);
+ }
+ }
break;
case 8:
if(hsize - ihsize - 14 > 0)
else
avctx->pix_fmt = PIX_FMT_GRAY8;
break;
+ case 1:
case 4:
if(hsize - ihsize - 14 > 0){
avctx->pix_fmt = PIX_FMT_PAL8;
}else{
- av_log(avctx, AV_LOG_ERROR, "Unknown palette for 16-colour BMP\n");
+ av_log(avctx, AV_LOG_ERROR, "Unknown palette for %d-colour BMP\n", 1<<depth);
return -1;
}
break;
- case 1:
- avctx->pix_fmt = PIX_FMT_MONOBLACK;
- break;
default:
av_log(avctx, AV_LOG_ERROR, "depth %d not supported\n", depth);
return -1;
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- p->pict_type = FF_I_TYPE;
+ p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
buf = buf0 + hsize;
}
if(avctx->pix_fmt == PIX_FMT_PAL8){
+ int colors = 1 << depth;
+ if(ihsize >= 36){
+ int t;
+ buf = buf0 + 46;
+ t = bytestream_get_le32(&buf);
+ if(t < 0 || t > (1 << depth)){
+ av_log(avctx, AV_LOG_ERROR, "Incorrect number of colors - %X for bitdepth %d\n", t, depth);
+ }else if(t){
+ colors = t;
+ }
+ }
buf = buf0 + 14 + ihsize; //palette location
- if((hsize-ihsize-14)>>depth < 4){ // OS/2 bitmap, 3 bytes per palette entry
- for(i = 0; i < (1 << depth); i++)
+ if((hsize-ihsize-14) < (colors << 2)){ // OS/2 bitmap, 3 bytes per palette entry
+ for(i = 0; i < colors; i++)
((uint32_t*)p->data[1])[i] = bytestream_get_le24(&buf);
}else{
- for(i = 0; i < (1 << depth); i++)
+ for(i = 0; i < colors; i++)
((uint32_t*)p->data[1])[i] = bytestream_get_le32(&buf);
}
buf = buf0 + hsize;
}
if(comp == BMP_RLE4 || comp == BMP_RLE8){
+ if(height < 0){
+ p->data[0] += p->linesize[0] * (avctx->height - 1);
+ p->linesize[0] = -p->linesize[0];
+ }
ff_msrle_decode(avctx, (AVPicture*)p, depth, buf, dsize);
+ if(height < 0){
+ p->data[0] += p->linesize[0] * (avctx->height - 1);
+ p->linesize[0] = -p->linesize[0];
+ }
}else{
switch(depth){
case 1:
- for(i = 0; i < avctx->height; i++){
- memcpy(ptr, buf, n);
- buf += n;
- ptr += linesize;
- }
- break;
- case 4:
- for(i = 0; i < avctx->height; i++){
+ for (i = 0; i < avctx->height; i++) {
int j;
- for(j = 0; j < n; j++){
- ptr[j*2+0] = (buf[j] >> 4) & 0xF;
- ptr[j*2+1] = buf[j] & 0xF;
+ for (j = 0; j < n; j++) {
+ ptr[j*8+0] = buf[j] >> 7;
+ ptr[j*8+1] = (buf[j] >> 6) & 1;
+ ptr[j*8+2] = (buf[j] >> 5) & 1;
+ ptr[j*8+3] = (buf[j] >> 4) & 1;
+ ptr[j*8+4] = (buf[j] >> 3) & 1;
+ ptr[j*8+5] = (buf[j] >> 2) & 1;
+ ptr[j*8+6] = (buf[j] >> 1) & 1;
+ ptr[j*8+7] = buf[j] & 1;
}
buf += n;
ptr += linesize;
}
break;
case 8:
+ case 24:
for(i = 0; i < avctx->height; i++){
- memcpy(ptr, buf, avctx->width);
+ memcpy(ptr, buf, n);
buf += n;
ptr += linesize;
}
break;
- case 24:
+ case 4:
for(i = 0; i < avctx->height; i++){
- memcpy(ptr, buf, avctx->width*(depth>>3));
+ int j;
+ for(j = 0; j < n; j++){
+ ptr[j*2+0] = (buf[j] >> 4) & 0xF;
+ ptr[j*2+1] = buf[j] & 0xF;
+ }
buf += n;
ptr += linesize;
}
uint16_t *dst = (uint16_t *) ptr;
for(j = 0; j < avctx->width; j++)
- *dst++ = le2me_16(*src++);
+ *dst++ = av_le2ne16(*src++);
buf += n;
ptr += linesize;
return 0;
}
-AVCodec bmp_decoder = {
- "bmp",
- CODEC_TYPE_VIDEO,
- CODEC_ID_BMP,
- sizeof(BMPContext),
- bmp_decode_init,
- NULL,
- bmp_decode_end,
- bmp_decode_frame,
+AVCodec ff_bmp_decoder = {
+ .name = "bmp",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_BMP,
+ .priv_data_size = sizeof(BMPContext),
+ .init = bmp_decode_init,
+ .close = bmp_decode_end,
+ .decode = bmp_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("BMP image"),
};
projects / ffmpeg / blobdiff