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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-01-20 06:39:43 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-01-28 01:36:43 +0100 |
| commit | 49f2056289ab61be8803e86ca4cb0a6fd3116ead (patch) | |
| tree | f876745b2671f95d597b830b0bf237ad17f28569 /libavcodec/pngdec.c | |
| parent | eb3f81e4ef73bb8d7e2c75ff0e8cb43de1c7dac5 (diff) | |
| download | ffmpeg-49f2056289ab61be8803e86ca4cb0a6fd3116ead.tar.gz | |
pngdec: Convert 2/4 bit formats to 8bit.
This way 2 and 4 bit gray, rgb & rgba are supported.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/pngdec.c')
| -rw-r--r-- | libavcodec/pngdec.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c index e91bca4f97..c016a62d50 100644 --- a/libavcodec/pngdec.c +++ b/libavcodec/pngdec.c @@ -471,13 +471,13 @@ static int decode_frame(AVCodecContext *avctx, s->bpp = (s->bits_per_pixel + 7) >> 3; s->row_size = (avctx->width * s->bits_per_pixel + 7) >> 3; - if (s->bit_depth == 8 && + if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && s->color_type == PNG_COLOR_TYPE_RGB) { avctx->pix_fmt = PIX_FMT_RGB24; - } else if (s->bit_depth == 8 && + } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { avctx->pix_fmt = PIX_FMT_RGBA; - } else if (s->bit_depth == 8 && + } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && s->color_type == PNG_COLOR_TYPE_GRAY) { avctx->pix_fmt = PIX_FMT_GRAY8; } else if (s->bit_depth == 16 && @@ -625,12 +625,21 @@ static int decode_frame(AVCodecContext *avctx, int i, j; uint8_t *pd = s->current_picture->data[0]; for(j=0; j < s->height; j++) { + if (s->color_type == PNG_COLOR_TYPE_PALETTE){ for(i=s->width/4-1; i>=0; i--) { pd[4*i+3]= pd[i] &3; pd[4*i+2]= (pd[i]>>2)&3; pd[4*i+1]= (pd[i]>>4)&3; pd[4*i+0]= pd[i]>>6; } + } else { + for(i=s->width/4-1; i>=0; i--) { + pd[4*i+3]= ( pd[i] &3)*0x55; + pd[4*i+2]= ((pd[i]>>2)&3)*0x55; + pd[4*i+1]= ((pd[i]>>4)&3)*0x55; + pd[4*i+0]= ( pd[i]>>6 )*0x55; + } + } pd += s->image_linesize; } } @@ -638,10 +647,17 @@ static int decode_frame(AVCodecContext *avctx, int i, j; uint8_t *pd = s->current_picture->data[0]; for(j=0; j < s->height; j++) { + if (s->color_type == PNG_COLOR_TYPE_PALETTE){ for(i=s->width/2-1; i>=0; i--) { pd[2*i+1]= pd[i]&15; pd[2*i+0]= pd[i]>>4; } + } else { + for(i=s->width/2-1; i>=0; i--) { + pd[2*i+1]= (pd[i]&15)*0x11; + pd[2*i+0]= (pd[i]>>4)*0x11; + } + } pd += s->image_linesize; } } |