/* * DPX (.dpx) image encoder * Copyright (c) 2011 Peter Ross * * 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 AVFrame *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 AVFrame *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 AVFrame *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; jheight; j++) { memcpy(dst, src, len); memset(dst + len, 0, need_align); dst += len + need_align; src += frame->linesize[0]; } } else { size = av_image_copy_to_buffer(buf + HEADER_SIZE, pkt->size - HEADER_SIZE, (const uint8_t**)frame->data, frame->linesize, avctx->pix_fmt, avctx->width, avctx->height, 1); } if (size < 0) return size; break; case 10: if (s->planar) encode_gbrp10(avctx, frame, buf + HEADER_SIZE); else encode_rgb48_10bit(avctx, frame, buf + HEADER_SIZE); break; case 12: encode_gbrp12(avctx, 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}, };