a247ac640d
Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
297 lines
9.8 KiB
C
297 lines
9.8 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 num_components;
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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;
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s->num_components = desc->nb_components;
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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_ABGR:
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s->descriptor = 52;
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break;
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case AV_PIX_FMT_GRAY16BE:
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case AV_PIX_FMT_GRAY16LE:
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case AV_PIX_FMT_GRAY8:
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s->descriptor = 6;
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break;
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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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static av_always_inline void write16_internal(int big_endian, void *p, int value)
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{
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if (big_endian) AV_WB16(p, value);
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else AV_WL16(p, value);
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}
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static av_always_inline void write32_internal(int big_endian, void *p, int value)
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{
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if (big_endian) AV_WB32(p, value);
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else AV_WL32(p, value);
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}
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#define write16(p, value) write16_internal(s->big_endian, p, value)
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#define write32(p, value) write32_internal(s->big_endian, p, value)
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static void encode_rgb48_10bit(AVCodecContext *avctx, const AVFrame *pic,
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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 AVFrame *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 AVFrame *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, pad;
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pad = avctx->width*6;
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pad = (FFALIGN(pad, 4) - pad) >> 1;
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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 < pad; i++)
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*dst++ = 0;
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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, need_align, len;
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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 if (s->bits_per_component == 12) {
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// 3 components, 12 bits put on 16 bits
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len = avctx->width*6;
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size = FFALIGN(len, 4);
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need_align = size - len;
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size *= avctx->height;
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} else {
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// N components, M bits
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len = avctx->width * s->num_components * s->bits_per_component >> 3;
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size = FFALIGN(len, 4);
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need_align = size - len;
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size *= avctx->height;
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}
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if ((ret = ff_alloc_packet2(avctx, pkt, size + HEADER_SIZE, 0)) < 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 & AV_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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if (need_align) {
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int j;
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const uint8_t *src = frame->data[0];
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uint8_t *dst = pkt->data + HEADER_SIZE;
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size = (len + need_align) * avctx->height;
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for (j=0; j<avctx->height; j++) {
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memcpy(dst, src, len);
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memset(dst + len, 0, need_align);
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dst += len + need_align;
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src += frame->linesize[0];
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}
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} else {
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size = av_image_copy_to_buffer(buf + HEADER_SIZE, pkt->size - HEADER_SIZE,
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(const uint8_t**)frame->data, frame->linesize,
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avctx->pix_fmt,
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avctx->width, avctx->height, 1);
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}
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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, frame, buf + HEADER_SIZE);
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else
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encode_rgb48_10bit(avctx, frame, buf + HEADER_SIZE);
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break;
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case 12:
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encode_gbrp12(avctx, 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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const AVCodec ff_dpx_encoder = {
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.name = "dpx",
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.long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"),
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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_GRAY8,
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AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR,
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AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
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AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
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AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
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AV_PIX_FMT_GBRP10LE, AV_PIX_FMT_GBRP10BE,
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AV_PIX_FMT_GBRP12LE, AV_PIX_FMT_GBRP12BE,
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AV_PIX_FMT_NONE},
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};
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