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Allow setting resolution in DPI for Tiff.

This commit is contained in:
Carl Eugen Hoyos 2011-08-18 23:17:51 +02:00
parent edae3dbf1d
commit fc5299e9b7
1 changed files with 10 additions and 1 deletions
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11
libavcodec/tiffenc.c
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@ -29,6 +29,7 @@
#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "libavutil/opt.h"
#include "bytestream.h"
#include "tiff.h"
#include "rle.h"
@ -61,6 +62,7 @@ typedef struct TiffEncoderContext {
int buf_size; ///< buffer size
uint16_t subsampling[2]; ///< YUV subsampling factors
struct LZWEncodeState *lzws; ///< LZW Encode state
uint32_t dpi; ///< image resolution in DPI
} TiffEncoderContext;
@ -210,7 +212,7 @@ static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
uint32_t *strip_sizes = NULL;
uint32_t *strip_offsets = NULL;
int bytes_per_row;
uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
uint32_t res[2] = { s->dpi, 1 }; // image resolution (72/1)
uint16_t bpp_tab[] = { 8, 8, 8, 8 };
int ret = -1;
int is_yuv = 0;
@ -441,6 +443,12 @@ fail:
return ret;
}
static const AVOption options[]={
{"dpi", "set the image resolution (in dpi)", offsetof(TiffEncoderContext, dpi), FF_OPT_TYPE_INT, {.dbl = 72}, 1, 0x10000, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_ENCODING_PARAM},
{NULL}
};
static const AVClass class = { "tiff", av_default_item_name, options, LIBAVUTIL_VERSION_INT };
AVCodec ff_tiff_encoder = {
.name = "tiff",
.type = AVMEDIA_TYPE_VIDEO,
@ -455,4 +463,5 @@ AVCodec ff_tiff_encoder = {
PIX_FMT_YUV411P,
PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
.priv_class= &class,
};