mirror of
https://git.ffmpeg.org/ffmpeg.git
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257 lines
8.2 KiB
C
257 lines
8.2 KiB
C
/*
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* DPX (.dpx) image encoder
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* Copyright (c) 2011 Peter Ross <pross@xvid.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/imgutils.h"
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#include "avcodec.h"
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#include "internal.h"
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typedef struct DPXContext {
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int big_endian;
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int bits_per_component;
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int descriptor;
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int planar;
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} DPXContext;
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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DPXContext *s = avctx->priv_data;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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s->big_endian = !!(desc->flags & AV_PIX_FMT_FLAG_BE);
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s->bits_per_component = desc->comp[0].depth_minus1 + 1;
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s->descriptor = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? 51 : 50;
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s->planar = !!(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
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switch (avctx->pix_fmt) {
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case AV_PIX_FMT_GBRP10BE:
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case AV_PIX_FMT_GBRP10LE:
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case AV_PIX_FMT_GBRP12BE:
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case AV_PIX_FMT_GBRP12LE:
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case AV_PIX_FMT_RGB24:
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case AV_PIX_FMT_RGBA64BE:
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case AV_PIX_FMT_RGBA64LE:
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case AV_PIX_FMT_RGBA:
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break;
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case AV_PIX_FMT_RGB48LE:
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case AV_PIX_FMT_RGB48BE:
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if (avctx->bits_per_raw_sample)
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s->bits_per_component = avctx->bits_per_raw_sample;
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break;
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default:
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av_log(avctx, AV_LOG_INFO, "unsupported pixel format\n");
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return -1;
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}
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return 0;
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}
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#define write16(p, value) \
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do { \
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if (s->big_endian) AV_WB16(p, value); \
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else AV_WL16(p, value); \
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} while(0)
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#define write32(p, value) \
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do { \
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if (s->big_endian) AV_WB32(p, value); \
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else AV_WL32(p, value); \
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} while(0)
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static void encode_rgb48_10bit(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
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{
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DPXContext *s = avctx->priv_data;
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const uint8_t *src = pic->data[0];
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int x, y;
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for (y = 0; y < avctx->height; y++) {
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for (x = 0; x < avctx->width; x++) {
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int value;
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if (s->big_endian) {
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value = ((AV_RB16(src + 6*x + 4) & 0xFFC0U) >> 4)
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| ((AV_RB16(src + 6*x + 2) & 0xFFC0U) << 6)
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| ((AV_RB16(src + 6*x + 0) & 0xFFC0U) << 16);
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} else {
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value = ((AV_RL16(src + 6*x + 4) & 0xFFC0U) >> 4)
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| ((AV_RL16(src + 6*x + 2) & 0xFFC0U) << 6)
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| ((AV_RL16(src + 6*x + 0) & 0xFFC0U) << 16);
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}
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write32(dst, value);
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dst += 4;
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}
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src += pic->linesize[0];
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}
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}
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static void encode_gbrp10(AVCodecContext *avctx, const AVPicture *pic, uint8_t *dst)
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{
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DPXContext *s = avctx->priv_data;
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const uint8_t *src[3] = {pic->data[0], pic->data[1], pic->data[2]};
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int x, y, i;
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for (y = 0; y < avctx->height; y++) {
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for (x = 0; x < avctx->width; x++) {
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int value;
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if (s->big_endian) {
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value = (AV_RB16(src[0] + 2*x) << 12)
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| (AV_RB16(src[1] + 2*x) << 2)
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| ((unsigned)AV_RB16(src[2] + 2*x) << 22);
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} else {
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value = (AV_RL16(src[0] + 2*x) << 12)
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| (AV_RL16(src[1] + 2*x) << 2)
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| ((unsigned)AV_RL16(src[2] + 2*x) << 22);
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}
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write32(dst, value);
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dst += 4;
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}
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for (i = 0; i < 3; i++)
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src[i] += pic->linesize[i];
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}
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}
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static void encode_gbrp12(AVCodecContext *avctx, const AVPicture *pic, uint16_t *dst)
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{
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DPXContext *s = avctx->priv_data;
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const uint16_t *src[3] = {(uint16_t*)pic->data[0],
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(uint16_t*)pic->data[1],
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(uint16_t*)pic->data[2]};
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int x, y, i;
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for (y = 0; y < avctx->height; y++) {
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for (x = 0; x < avctx->width; x++) {
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uint16_t value[3];
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if (s->big_endian) {
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value[1] = AV_RB16(src[0] + x) << 4;
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value[2] = AV_RB16(src[1] + x) << 4;
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value[0] = AV_RB16(src[2] + x) << 4;
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} else {
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value[1] = AV_RL16(src[0] + x) << 4;
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value[2] = AV_RL16(src[1] + x) << 4;
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value[0] = AV_RL16(src[2] + x) << 4;
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}
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for (i = 0; i < 3; i++)
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write16(dst++, value[i]);
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}
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for (i = 0; i < 3; i++)
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src[i] += pic->linesize[i]/2;
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}
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}
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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{
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DPXContext *s = avctx->priv_data;
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int size, ret;
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uint8_t *buf;
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#define HEADER_SIZE 1664 /* DPX Generic header */
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if (s->bits_per_component == 10)
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size = avctx->height * avctx->width * 4;
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else
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size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
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if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE)) < 0)
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return ret;
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buf = pkt->data;
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memset(buf, 0, HEADER_SIZE);
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/* File information header */
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write32(buf, MKBETAG('S','D','P','X'));
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write32(buf + 4, HEADER_SIZE);
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memcpy (buf + 8, "V1.0", 4);
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write32(buf + 20, 1); /* new image */
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write32(buf + 24, HEADER_SIZE);
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if (!(avctx->flags & CODEC_FLAG_BITEXACT))
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memcpy (buf + 160, LIBAVCODEC_IDENT, FFMIN(sizeof(LIBAVCODEC_IDENT), 100));
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write32(buf + 660, 0xFFFFFFFF); /* unencrypted */
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/* Image information header */
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write16(buf + 768, 0); /* orientation; left to right, top to bottom */
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write16(buf + 770, 1); /* number of elements */
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write32(buf + 772, avctx->width);
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write32(buf + 776, avctx->height);
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buf[800] = s->descriptor;
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buf[801] = 2; /* linear transfer */
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buf[802] = 2; /* linear colorimetric */
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buf[803] = s->bits_per_component;
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write16(buf + 804, (s->bits_per_component == 10 || s->bits_per_component == 12) ?
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1 : 0); /* packing method */
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write32(buf + 808, HEADER_SIZE); /* data offset */
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/* Image source information header */
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write32(buf + 1628, avctx->sample_aspect_ratio.num);
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write32(buf + 1632, avctx->sample_aspect_ratio.den);
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switch(s->bits_per_component) {
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case 8:
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case 16:
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size = avpicture_layout((const AVPicture*)frame, avctx->pix_fmt,
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avctx->width, avctx->height,
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buf + HEADER_SIZE, pkt->size - HEADER_SIZE);
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if (size < 0)
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return size;
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break;
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case 10:
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if (s->planar)
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encode_gbrp10(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
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else
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encode_rgb48_10bit(avctx, (const AVPicture*)frame, buf + HEADER_SIZE);
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break;
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case 12:
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encode_gbrp12(avctx, (const AVPicture*)frame, (uint16_t*)(buf + HEADER_SIZE));
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth: %d\n", s->bits_per_component);
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return -1;
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}
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size += HEADER_SIZE;
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write32(buf + 16, size); /* file size */
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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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AVCodec ff_dpx_encoder = {
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.name = "dpx",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_DPX,
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.priv_data_size = sizeof(DPXContext),
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.init = encode_init,
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.encode2 = encode_frame,
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.pix_fmts = (const enum AVPixelFormat[]){
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AV_PIX_FMT_RGB24,
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AV_PIX_FMT_RGBA,
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AV_PIX_FMT_RGB48LE,
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AV_PIX_FMT_RGB48BE,
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AV_PIX_FMT_RGBA64LE,
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AV_PIX_FMT_RGBA64BE,
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AV_PIX_FMT_GBRP10LE,
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AV_PIX_FMT_GBRP10BE,
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AV_PIX_FMT_GBRP12LE,
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AV_PIX_FMT_GBRP12BE,
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AV_PIX_FMT_NONE},
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.long_name = NULL_IF_CONFIG_SMALL("DPX image"),
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};
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