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24778c32d8
ffmpeg/libavcodec/dpxenc.c
Georg Lippitsch 24778c32d8 Fix writing 12 bit DPX 
The DPX encoder now writes 12 DPX that open correctly (tested with
ImageMagick), and also correspond to the 12 bit sample files at
http://samples.ffmpeg.org/image-samples/dpx_samples.zip

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2012-10-13 00:31:21 +02:00

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/*
* DPX (.dpx) image encoder
* Copyright (c) 2011 Peter Ross <pross@xvid.org>
*
* This file is part of FFmpeg.
*
* FFmpeg 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "internal.h"
typedef struct DPXContext {
AVFrame picture;
int big_endian;
int bits_per_component;
int descriptor;
int planar;
} DPXContext;
static av_cold int encode_init(AVCodecContext *avctx)
{
DPXContext *s = avctx->priv_data;
avctx->coded_frame = &s->picture;
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1;
s->big_endian = 1;
s->bits_per_component = 8;
s->descriptor = 50; /* RGB */
s->planar = 0;
switch (avctx->pix_fmt) {
case AV_PIX_FMT_RGB24:
break;
case AV_PIX_FMT_RGBA:
s->descriptor = 51; /* RGBA */
break;
case AV_PIX_FMT_RGB48LE:
s->big_endian = 0;
case AV_PIX_FMT_RGB48BE:
s->bits_per_component = avctx->bits_per_raw_sample ? avctx->bits_per_raw_sample : 16;
break;
case AV_PIX_FMT_RGBA64LE:
s->big_endian = 0;
case AV_PIX_FMT_RGBA64BE:
s->descriptor = 51;
s->bits_per_component = 16;
break;
case AV_PIX_FMT_GBRP10LE:
s->big_endian = 0;
case AV_PIX_FMT_GBRP10BE:
s->bits_per_component = 10;
s->planar = 1;
break;
case AV_PIX_FMT_GBRP12LE:
s->big_endian = 0;
case AV_PIX_FMT_GBRP12BE:
s->bits_per_component = 12;
s->planar = 1;
break;
default:
av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
return -1;
}
return 0;
}
#define write16(p, value) \
do { \
if (s->big_endian) AV_WB16(p, value); \
else AV_WL16(p, value); \
} while(0)
#define write32(p, value) \
do { \
if (s->big_endian) AV_WB32(p, value); \
else AV_WL32(p, value); \
} while(0)
static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
{
DPXContext *s = avctx->priv_data;
const uint8_t *src = pic->data[0];
int x, y;
for (y = 0; y < avctx->height; y++) {
for (x = 0; x < avctx->width; x++) {
int value;
if (s->big_endian) {
value = ((AV_RB16(src + 6*x + 4) & 0xFFC0) >> 4)
| ((AV_RB16(src + 6*x + 2) & 0xFFC0) << 6)
| ((AV_RB16(src + 6*x + 0) & 0xFFC0) << 16);
} else {
value = ((AV_RL16(src + 6*x + 4) & 0xFFC0) >> 4)
| ((AV_RL16(src + 6*x + 2) & 0xFFC0) << 6)
| ((AV_RL16(src + 6*x + 0) & 0xFFC0) << 16);
}
write32(dst, value);
dst += 4;
}
src += pic->linesize[0];
}
}
static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
{
DPXContext *s = avctx->priv_data;
const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
int x, y, i;
for (y = 0; y < avctx->height; y++) {
for (x = 0; x < avctx->width; x++) {
int value;
if (s->big_endian) {
value = (AV_RB16(src[0] + 2*x) << 12)
| (AV_RB16(src[1] + 2*x) << 2)
| (AV_RB16(src[2] + 2*x) << 22);
} else {
value = (AV_RL16(src[0] + 2*x) << 12)
| (AV_RL16(src[1] + 2*x) << 2)
| (AV_RL16(src[2] + 2*x) << 22);
}
write32(dst, value);
dst += 4;
}
for (i = 0; i < 3; i++)
src[i] += pic->linesize[i];
}
}
static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
{
DPXContext *s = avctx->priv_data;
const uint16_t *src[3] = {(uint16_t*)pic->data[0],
(uint16_t*)pic->data[1],
(uint16_t*)pic->data[2]};
int x, y, i;
for (y = 0; y < avctx->height; y++) {
for (x = 0; x < avctx->width; x++) {
uint16_t value[3];
if (s->big_endian) {
value[1] = AV_RB16(src[0] + x) << 4;
value[2] = AV_RB16(src[1] + x) << 4;
value[0] = AV_RB16(src[2] + x) << 4;
} else {
value[1] = AV_RL16(src[0] + x) << 4;
value[2] = AV_RL16(src[1] + x) << 4;
value[0] = AV_RL16(src[2] + x) << 4;
}
for (i = 0; i < 3; i++)
write16(dst++, value[i]);
}
for (i = 0; i < 3; i++)
src[i] += pic->linesize[i]/2;
}
}
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
DPXContext *s = avctx->priv_data;
int size, ret;
uint8_t *buf;
#define HEADER_SIZE 1664 /* DPX Generic header */
if (s->bits_per_component == 10)
size = avctx->height * avctx->width * 4;
else
size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE)) < 0)
return ret;
buf = pkt->data;
memset(buf, 0, HEADER_SIZE);
/* File information header */
write32(buf, MKBETAG('S','D','P','X'));
write32(buf + 4, HEADER_SIZE);
memcpy (buf + 8, "V1.0", 4);
write32(buf + 20, 1); /* new image */
write32(buf + 24, HEADER_SIZE);
if (!(avctx->flags & CODEC_FLAG_BITEXACT))
memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
/* Image information header */
write16(buf + 768, 0); /* orientation; left to right, top to bottom */
write16(buf + 770, 1); /* number of elements */
write32(buf + 772, avctx->width);
write32(buf + 776, avctx->height);
buf[800] = s->descriptor;
buf[801] = 2; /* linear transfer */
buf[802] = 2; /* linear colorimetric */
buf[803] = s->bits_per_component;
write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
1 : 0); /* packing method */
/* Image source information header */
write32(buf + 1628, avctx->sample_aspect_ratio.num);
write32(buf + 1632, avctx->sample_aspect_ratio.den);
switch(s->bits_per_component) {
case 8:
case 16:
size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
avctx->width, avctx->height,
buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
if (size < 0)
return size;
break;
case 10:
if (s->planar)
encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
else
encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
break;
case 12:
encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE));
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
return -1;
}
size += HEADER_SIZE;
write32(buf + 16, size); /* file size */
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
AVCodec ff_dpx_encoder = {
.name = "dpx",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_DPX,
.priv_data_size = sizeof(DPXContext),
.init = encode_init,
.encode2 = encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_RGB24,
AV_PIX_FMT_RGBA,
AV_PIX_FMT_RGB48LE,
AV_PIX_FMT_RGB48BE,
AV_PIX_FMT_RGBA64LE,
AV_PIX_FMT_RGBA64BE,
AV_PIX_FMT_GBRP10LE,
AV_PIX_FMT_GBRP10BE,
AV_PIX_FMT_GBRP12LE,
AV_PIX_FMT_GBRP12BE,
AV_PIX_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("DPX image"),
};
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