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FFmpeg/libavcodec/dpxenc.c

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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 {
int big_endian;
int bits_per_component;
int num_components;
int descriptor;
int planar;
} DPXContext;
static av_cold int encode_init(AVCodecContext *avctx)
{
DPXContext *s = avctx->priv_data;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
s->big_endian = !!(desc->flags & AV_PIX_FMT_FLAG_BE);
s->bits_per_component = desc->comp[0].depth;
s->num_components = desc->nb_components;
s->descriptor = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50;
s->planar = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
switch (avctx->pix_fmt) {
case AV_PIX_FMT_ABGR:
s->descriptor = 52;
break;
case AV_PIX_FMT_GRAY16BE:
case AV_PIX_FMT_GRAY16LE:
case AV_PIX_FMT_GRAY8:
s->descriptor = 6;
break;
case AV_PIX_FMT_GBRP10BE:
case AV_PIX_FMT_GBRP10LE:
case AV_PIX_FMT_GBRP12BE:
case AV_PIX_FMT_GBRP12LE:
case AV_PIX_FMT_RGB24:
case AV_PIX_FMT_RGBA64BE:
case AV_PIX_FMT_RGBA64LE:
case AV_PIX_FMT_RGBA:
break;
case AV_PIX_FMT_RGB48LE:
case AV_PIX_FMT_RGB48BE:
if (avctx->bits_per_raw_sample)
s->bits_per_component = avctx->bits_per_raw_sample;
break;
default:
av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
return -1;
}
return 0;
}
static av_always_inline void write16_internal(int big_endian, void *p, int value)
{
if (big_endian) AV_WB16(p, value);
else AV_WL16(p, value);
}
static av_always_inline void write32_internal(int big_endian, void *p, int value)
{
if (big_endian) AV_WB32(p, value);
else AV_WL32(p, value);
}
#define write16(p, value) write16_internal(s->big_endian, p, value)
#define write32(p, value) write32_internal(s->big_endian, p, value)
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) & 0xFFC0U) >> 4)
| ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
| ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
} else {
value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
| ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
| ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 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)
| ((unsigned)AV_RB16(src[2] + 2*x) << 22);
} else {
value = (AV_RL16(src[0] + 2*x) << 12)
| (AV_RL16(src[1] + 2*x) << 2)
| ((unsigned)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, pad;
pad = avctx->width*6;
pad = (FFALIGN(pad, 4) - pad) >> 1;
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 < pad; i++)
*dst++ = 0;
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, need_align, len;
uint8_t *buf;
#define HEADER_SIZE 1664 /* DPX Generic header */
if (s->bits_per_component == 10)
size = avctx->height * avctx->width * 4;
else if (s->bits_per_component == 12) {
// 3 components, 12 bits put on 16 bits
len = avctx->width*6;
size = FFALIGN(len, 4);
need_align = size - len;
size *= avctx->height;
} else {
// N components, M bits
len = avctx->width * s->num_components * s->bits_per_component >> 3;
size = FFALIGN(len, 4);
need_align = size - len;
size *= avctx->height;
}
if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE, 0)) < 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 & AV_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 */
write32(buf + 808, HEADER_SIZE); /* data offset */
/* 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:
if (need_align) {
int j;
const uint8_t *src = frame->data[0];
uint8_t *dst = pkt->data + HEADER_SIZE;
size = (len + need_align) * avctx->height;
for (j=0; j<avctx->height; j++) {
memcpy(dst, src, len);
memset(dst + len, 0, need_align);
dst += len + need_align;
src += frame->linesize[0];
}
} else {
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",
.long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
.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_GRAY8,
AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR,
AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
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},
};
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