* 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
- *
*/
+/**
+ * TIFF image encoder
+ * @file libavcodec/tiffenc.c
+ * @author Bartlomiej Wolowiec
+ */
#include "avcodec.h"
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
#include <zlib.h>
#endif
#include "bytestream.h"
#include "tiff.h"
#include "rle.h"
+#include "lzw.h"
#define TIFF_MAX_ENTRY 32
unsigned int bpp; ///< bits per pixel
int compr; ///< compression level
int bpp_tab_size; ///< bpp_tab size
- int invert; ///< photometric interpretation
+ int photometric_interpretation; ///< photometric interpretation
int strips; ///< number of strips
int rps; ///< row per strip
uint8_t entries[TIFF_MAX_ENTRY*12]; ///< entires in header
uint8_t **buf; ///< actual position in buffer
uint8_t *buf_start; ///< pointer to first byte in buffer
int buf_size; ///< buffer size
+ uint16_t subsampling[2]; ///< YUV subsampling factors
+ struct LZWEncodeState *lzws; ///< LZW Encode state
} TiffEncoderContext;
s->num_entries++;
}
+static void add_entry1(TiffEncoderContext * s,
+ enum TiffTags tag, enum TiffTypes type, int val){
+ uint16_t w = val;
+ uint32_t dw= val;
+ add_entry(s, tag, type, 1, type == TIFF_SHORT ? (void *)&w : (void *)&dw);
+}
+
/**
* Encode one strip in tiff file
*
{
switch (compr) {
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
case TIFF_DEFLATE:
case TIFF_ADOBE_DEFLATE:
{
return n;
case TIFF_PACKBITS:
return ff_rle_encode(dst, s->buf_size - (*s->buf - s->buf_start), src, 1, n, 2, 0xff, -1, 0);
+ case TIFF_LZW:
+ return ff_lzw_encode(s->lzws, src, n);
default:
return -1;
}
}
+static void pack_yuv(TiffEncoderContext * s, uint8_t * dst, int lnum)
+{
+ AVFrame *p = &s->picture;
+ int i, j, k;
+ int w = (s->width - 1) / s->subsampling[0] + 1;
+ uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
+ uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
+ for (i = 0; i < w; i++){
+ for (j = 0; j < s->subsampling[1]; j++)
+ for (k = 0; k < s->subsampling[0]; k++)
+ *dst++ = p->data[0][(lnum + j) * p->linesize[0] +
+ i * s->subsampling[0] + k];
+ *dst++ = *pu++;
+ *dst++ = *pv++;
+ }
+}
+
static int encode_frame(AVCodecContext * avctx, unsigned char *buf,
int buf_size, void *data)
{
uint32_t res[2] = { 72, 1 }; // image resolution (72/1)
static const uint16_t bpp_tab[] = { 8, 8, 8, 8 };
int ret = -1;
+ int is_yuv = 0;
+ uint8_t *yuv_line = NULL;
+ int shift_h, shift_v;
s->buf_start = buf;
s->buf = &ptr;
*p = *pict;
p->pict_type = FF_I_TYPE;
p->key_frame = 1;
+ avctx->coded_frame= &s->picture;
s->compr = TIFF_PACKBITS;
if (avctx->compression_level == 0) {
s->compr = TIFF_RAW;
-#ifdef CONFIG_ZLIB
- } else if ((avctx->compression_level > 2)) {
+ } else if(avctx->compression_level == 2) {
+ s->compr = TIFF_LZW;
+#if CONFIG_ZLIB
+ } else if ((avctx->compression_level >= 3)) {
s->compr = TIFF_DEFLATE;
#endif
}
s->width = avctx->width;
s->height = avctx->height;
+ s->subsampling[0] = 1;
+ s->subsampling[1] = 1;
switch (avctx->pix_fmt) {
case PIX_FMT_RGB24:
s->bpp = 24;
- s->invert = 2;
+ s->photometric_interpretation = 2;
break;
case PIX_FMT_GRAY8:
s->bpp = 8;
- s->invert = 1;
+ s->photometric_interpretation = 1;
break;
case PIX_FMT_PAL8:
s->bpp = 8;
- s->invert = 3;
+ s->photometric_interpretation = 3;
break;
case PIX_FMT_MONOBLACK:
s->bpp = 1;
- s->invert = 1;
+ s->photometric_interpretation = 1;
break;
case PIX_FMT_MONOWHITE:
s->bpp = 1;
- s->invert = 0;
+ s->photometric_interpretation = 0;
+ break;
+ case PIX_FMT_YUV420P:
+ case PIX_FMT_YUV422P:
+ case PIX_FMT_YUV444P:
+ case PIX_FMT_YUV410P:
+ case PIX_FMT_YUV411P:
+ s->photometric_interpretation = 6;
+ avcodec_get_chroma_sub_sample(avctx->pix_fmt,
+ &shift_h, &shift_v);
+ s->bpp = 8 + (16 >> (shift_h + shift_v));
+ s->subsampling[0] = 1 << shift_h;
+ s->subsampling[1] = 1 << shift_v;
+ s->bpp_tab_size = 3;
+ is_yuv = 1;
break;
default:
av_log(s->avctx, AV_LOG_ERROR,
"This colors format is not supported\n");
return -1;
}
- s->bpp_tab_size = (s->bpp >> 3);
+ if (!is_yuv)
+ s->bpp_tab_size = (s->bpp >> 3);
- if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE)
+ if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE || s->compr == TIFF_LZW)
//best choose for DEFLATE
s->rps = s->height;
else
s->rps = FFMAX(8192 / (((s->width * s->bpp) >> 3) + 1), 1); // suggest size of strip
+ s->rps = ((s->rps - 1) / s->subsampling[1] + 1) * s->subsampling[1]; // round rps up
strips = (s->height - 1) / s->rps + 1;
strip_sizes = av_mallocz(sizeof(*strip_sizes) * strips);
strip_offsets = av_mallocz(sizeof(*strip_offsets) * strips);
- bytes_per_row = (s->width * s->bpp + 7) >> 3;
+ bytes_per_row = (((s->width - 1)/s->subsampling[0] + 1) * s->bpp
+ * s->subsampling[0] * s->subsampling[1] + 7) >> 3;
+ if (is_yuv){
+ yuv_line = av_malloc(bytes_per_row);
+ if (yuv_line == NULL){
+ av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
+ goto fail;
+ }
+ }
-#ifdef CONFIG_ZLIB
+#if CONFIG_ZLIB
if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
uint8_t *zbuf;
int zlen, zn;
strip_offsets[0] = ptr - buf;
zn = 0;
for (j = 0; j < s->rps; j++) {
- memcpy(zbuf + j * bytes_per_row,
- p->data[0] + j * p->linesize[0], bytes_per_row);
+ if (is_yuv){
+ pack_yuv(s, yuv_line, j);
+ memcpy(zbuf + zn, yuv_line, bytes_per_row);
+ j += s->subsampling[1] - 1;
+ }
+ else
+ memcpy(zbuf + j * bytes_per_row,
+ p->data[0] + j * p->linesize[0], bytes_per_row);
zn += bytes_per_row;
}
n = encode_strip(s, zbuf, ptr, zn, s->compr);
} else
#endif
{
+ if(s->compr == TIFF_LZW)
+ s->lzws = av_malloc(ff_lzw_encode_state_size);
for (i = 0; i < s->height; i++) {
if (strip_sizes[i / s->rps] == 0) {
+ if(s->compr == TIFF_LZW){
+ ff_lzw_encode_init(s->lzws, ptr, s->buf_size - (*s->buf - s->buf_start), 12);
+ }
strip_offsets[i / s->rps] = ptr - buf;
}
- if ((n = encode_strip(s, p->data[0] + i * p->linesize[0]
- , ptr, bytes_per_row, s->compr)) < 0) {
+ if (is_yuv){
+ pack_yuv(s, yuv_line, i);
+ n = encode_strip(s, yuv_line, ptr, bytes_per_row, s->compr);
+ i += s->subsampling[1] - 1;
+ }
+ else
+ n = encode_strip(s, p->data[0] + i * p->linesize[0],
+ ptr, bytes_per_row, s->compr);
+ if (n < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Encode strip failed\n");
goto fail;
}
strip_sizes[i / s->rps] += n;
ptr += n;
+ if(s->compr == TIFF_LZW && (i==s->height-1 || i%s->rps == s->rps-1)){
+ int ret;
+ ret = ff_lzw_encode_flush(s->lzws);
+ strip_sizes[(i / s->rps )] += ret ;
+ ptr += ret;
+ }
}
+ if(s->compr == TIFF_LZW)
+ av_free(s->lzws);
}
s->num_entries = 0;
- add_entry(s, TIFF_SUBFILE, TIFF_LONG, 1, (uint32_t[]) {0});
- add_entry(s, TIFF_WIDTH, TIFF_LONG, 1, (uint32_t[]) {s->width});
- add_entry(s, TIFF_HEIGHT, TIFF_LONG, 1, (uint32_t[]) {s->height});
+ add_entry1(s,TIFF_SUBFILE, TIFF_LONG, 0);
+ add_entry1(s,TIFF_WIDTH, TIFF_LONG, s->width);
+ add_entry1(s,TIFF_HEIGHT, TIFF_LONG, s->height);
if (s->bpp_tab_size)
add_entry(s, TIFF_BPP, TIFF_SHORT, s->bpp_tab_size, bpp_tab);
- add_entry(s, TIFF_COMPR, TIFF_SHORT, 1, (uint16_t[]) {s->compr});
- add_entry(s, TIFF_INVERT, TIFF_SHORT, 1, (uint16_t[]) {s->invert});
+ add_entry1(s,TIFF_COMPR, TIFF_SHORT, s->compr);
+ add_entry1(s,TIFF_INVERT, TIFF_SHORT, s->photometric_interpretation);
add_entry(s, TIFF_STRIP_OFFS, TIFF_LONG, strips, strip_offsets);
if (s->bpp_tab_size)
- add_entry(s, TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, 1, (uint16_t[]) {s->bpp_tab_size});
+ add_entry1(s,TIFF_SAMPLES_PER_PIXEL, TIFF_SHORT, s->bpp_tab_size);
- add_entry(s, TIFF_ROWSPERSTRIP, TIFF_LONG, 1, (uint32_t[]) {s->rps});
+ add_entry1(s,TIFF_ROWSPERSTRIP, TIFF_LONG, s->rps);
add_entry(s, TIFF_STRIP_SIZE, TIFF_LONG, strips, strip_sizes);
add_entry(s, TIFF_XRES, TIFF_RATIONAL, 1, res);
add_entry(s, TIFF_YRES, TIFF_RATIONAL, 1, res);
- add_entry(s, TIFF_RES_UNIT, TIFF_SHORT, 1, (uint16_t[]) {2});
+ add_entry1(s,TIFF_RES_UNIT, TIFF_SHORT, 2);
+
+ if(!(avctx->flags & CODEC_FLAG_BITEXACT))
add_entry(s, TIFF_SOFTWARE_NAME, TIFF_STRING,
strlen(LIBAVCODEC_IDENT) + 1, LIBAVCODEC_IDENT);
}
add_entry(s, TIFF_PAL, TIFF_SHORT, 256 * 3, pal);
}
+ if (is_yuv){
+ /** according to CCIR Recommendation 601.1 */
+ uint32_t refbw[12] = {15, 1, 235, 1, 128, 1, 240, 1, 128, 1, 240, 1};
+ add_entry(s, TIFF_YCBCR_SUBSAMPLING, TIFF_SHORT, 2, s->subsampling);
+ add_entry(s, TIFF_REFERENCE_BW, TIFF_RATIONAL, 6, refbw);
+ }
bytestream_put_le32(&offset, ptr - buf); // write offset to dir
if (check_size(s, 6 + s->num_entries * 12))
fail:
av_free(strip_sizes);
av_free(strip_offsets);
+ av_free(yuv_line);
return ret;
}
.pix_fmts =
(enum PixelFormat[]) {PIX_FMT_RGB24, PIX_FMT_PAL8, PIX_FMT_GRAY8,
PIX_FMT_MONOBLACK, PIX_FMT_MONOWHITE,
- -1}
-
+ PIX_FMT_YUV420P, PIX_FMT_YUV422P,
+ PIX_FMT_YUV444P, PIX_FMT_YUV410P,
+ PIX_FMT_YUV411P,
+ PIX_FMT_NONE},
+ .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
};
projects / frescor / ffmpeg.git / blobdiff