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