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pnm: add high-bitdepth PGMYUV support for both encoder and decoder

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This commit is contained in:
Kostya Shishkov 2013-02-22 11:57:59 +01:00
parent 2f325a6fd4
commit b5f536d24b
3 changed files with 65 additions and 4 deletions
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9
libavcodec/pnm.c
View File

@ -157,6 +157,13 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
} else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
if (s->maxval > 255)
avctx->pix_fmt = AV_PIX_FMT_RGB48BE;
} else if (avctx->pix_fmt == AV_PIX_FMT_YUV420P && s->maxval < 65536) {
if (s->maxval < 512)
avctx->pix_fmt = AV_PIX_FMT_YUV420P9BE;
else if (s->maxval < 1024)
avctx->pix_fmt = AV_PIX_FMT_YUV420P10BE;
else
avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
} else {
av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format\n");
avctx->pix_fmt = AV_PIX_FMT_NONE;
@ -166,7 +173,7 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s)
}else
s->maxval=1;
/* more check if YUV420 */
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
if (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PLANAR) {
if ((avctx->width & 1) != 0)
return AVERROR_INVALIDDATA;
h = (avctx->height * 2);

45
libavcodec/pnmdec.c
View File

@ -135,12 +135,16 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
}
break;
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUV420P9BE:
case AV_PIX_FMT_YUV420P10BE:
{
unsigned char *ptr1, *ptr2;
n = avctx->width;
ptr = p->data[0];
linesize = p->linesize[0];
if (s->maxval >= 256)
n *= 2;
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
@ -162,6 +166,47 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data,
}
}
break;
case AV_PIX_FMT_YUV420P16:
{
uint16_t *ptr1, *ptr2;
const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
unsigned int j, v;
n = avctx->width * 2;
ptr = p->data[0];
linesize = p->linesize[0];
if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
return AVERROR_INVALIDDATA;
for (i = 0; i < avctx->height; i++) {
for (j = 0; j < n / 2; j++) {
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
}
s->bytestream += n;
ptr += linesize;
}
ptr1 = (uint16_t*)p->data[1];
ptr2 = (uint16_t*)p->data[2];
n >>= 1;
h = avctx->height >> 1;
for (i = 0; i < h; i++) {
for (j = 0; j < n / 2; j++) {
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
ptr1[j] = (v * f + 16384) >> 15;
}
s->bytestream += n;
for (j = 0; j < n / 2; j++) {
v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
ptr2[j] = (v * f + 16384) >> 15;
}
s->bytestream += n;
ptr1 += p->linesize[1] / 2;
ptr2 += p->linesize[2] / 2;
}
}
break;
case AV_PIX_FMT_RGB32:
ptr = p->data[0];
linesize = p->linesize[0];

15
libavcodec/pnmenc.c
View File

@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
@ -76,6 +77,11 @@ static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
n = avctx->width;
h1 = (h * 3) / 2;
break;
case AV_PIX_FMT_YUV420P16BE:
c = '5';
n = avctx->width * 2;
h1 = (h * 3) / 2;
break;
default:
return -1;
}
@ -83,8 +89,9 @@ static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
"P%c\n%d %d\n", c, avctx->width, h1);
s->bytestream += strlen(s->bytestream);
if (avctx->pix_fmt != AV_PIX_FMT_MONOWHITE) {
int maxdepth = (1 << (av_pix_fmt_descriptors[avctx->pix_fmt].comp[0].depth_minus1 + 1)) - 1;
snprintf(s->bytestream, s->bytestream_end - s->bytestream,
"%d\n", (avctx->pix_fmt != AV_PIX_FMT_GRAY16BE && avctx->pix_fmt != AV_PIX_FMT_RGB48BE) ? 255 : 65535);
"%d\n", maxdepth);
s->bytestream += strlen(s->bytestream);
}
@ -96,7 +103,7 @@ static int pnm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
ptr += linesize;
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV420P16BE) {
h >>= 1;
n >>= 1;
ptr1 = p->data[1];
@ -141,7 +148,9 @@ AVCodec ff_pgmyuv_encoder = {
.priv_data_size = sizeof(PNMContext),
.init = ff_pnm_init,
.encode2 = pnm_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_NONE
},
.long_name = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
};
#endif