/* * DPX (.dpx) image encoder * Copyright (c) 2011 Peter Ross <pross@xvid.org> * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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; } 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 */ 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; 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 ((avctx->pix_fmt & 1)) { 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 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_packet(pkt, size + HEADER_SIZE)) < 0) { av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n"); 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 ? 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: encode_rgb48_10bit(avctx, (const AVPicture*)frame, 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_NONE}, .long_name = NULL_IF_CONFIG_SMALL("DPX image"), };