/* * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image encoder * Copyright (c) 2012 Aneesh Dogra (lionaneesh) <lionaneesh@gmail.com> * * 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 "avcodec.h" #include "bytestream.h" #include "internal.h" #include "sunrast.h" typedef struct SUNRASTContext { AVFrame picture; PutByteContext p; int depth; ///< depth of pixel int length; ///< length (bytes) of image int type; ///< type of file int maptype; ///< type of colormap int maplength; ///< length (bytes) of colormap int size; } SUNRASTContext; static void sunrast_image_write_header(AVCodecContext *avctx) { SUNRASTContext *s = avctx->priv_data; bytestream2_put_be32u(&s->p, RAS_MAGIC); bytestream2_put_be32u(&s->p, avctx->width); bytestream2_put_be32u(&s->p, avctx->height); bytestream2_put_be32u(&s->p, s->depth); bytestream2_put_be32u(&s->p, s->length); bytestream2_put_be32u(&s->p, s->type); bytestream2_put_be32u(&s->p, s->maptype); bytestream2_put_be32u(&s->p, s->maplength); } static void sunrast_image_write_image(AVCodecContext *avctx, const uint8_t *pixels, const uint32_t *palette_data, int linesize) { SUNRASTContext *s = avctx->priv_data; const uint8_t *ptr; int len, alen, x; if (s->maplength) { // palettized PutByteContext pb_r, pb_g; int len = s->maplength / 3; pb_r = s->p; bytestream2_skip_p(&s->p, len); pb_g = s->p; bytestream2_skip_p(&s->p, len); for (x = 0; x < len; x++) { uint32_t pixel = palette_data[x]; bytestream2_put_byteu(&pb_r, (pixel >> 16) & 0xFF); bytestream2_put_byteu(&pb_g, (pixel >> 8) & 0xFF); bytestream2_put_byteu(&s->p, pixel & 0xFF); } } len = (s->depth * avctx->width + 7) >> 3; alen = len + (len & 1); ptr = pixels; if (s->type == RT_BYTE_ENCODED) { uint8_t value, value2; int run; const uint8_t *start = linesize < 0 ? pixels + (avctx->height - 1) * linesize : pixels; const uint8_t *end = linesize < 0 ? pixels - linesize : pixels + avctx->height * linesize; ptr = pixels; #define GET_VALUE ptr >= end || ptr < start ? 0 : x >= len ? ptr[len-1] : ptr[x] x = 0; value2 = GET_VALUE; while (ptr < end && ptr >= start) { run = 1; value = value2; x++; if (x >= alen) { x = 0; ptr += linesize; } value2 = GET_VALUE; while (value2 == value && run < 256 && ptr < end && ptr >= start) { x++; run++; if (x >= alen) { x = 0; ptr += linesize; } value2 = GET_VALUE; } if (run > 2 || value == RLE_TRIGGER) { bytestream2_put_byteu(&s->p, RLE_TRIGGER); bytestream2_put_byteu(&s->p, run - 1); if (run > 1) bytestream2_put_byteu(&s->p, value); } else if (run == 1) { bytestream2_put_byteu(&s->p, value); } else bytestream2_put_be16u(&s->p, (value << 8) | value); } // update data length for header s->length = bytestream2_tell_p(&s->p) - 32 - s->maplength; } else { int y; for (y = 0; y < avctx->height; y++) { bytestream2_put_buffer(&s->p, ptr, len); if (len < alen) bytestream2_put_byteu(&s->p, 0); ptr += linesize; } } } static av_cold int sunrast_encode_init(AVCodecContext *avctx) { SUNRASTContext *s = avctx->priv_data; switch (avctx->coder_type) { case FF_CODER_TYPE_RLE: s->type = RT_BYTE_ENCODED; break; case FF_CODER_TYPE_RAW: s->type = RT_STANDARD; break; default: av_log(avctx, AV_LOG_ERROR, "invalid coder_type\n"); return AVERROR(EINVAL); } avctx->coded_frame = &s->picture; avctx->coded_frame->key_frame = 1; avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; s->maptype = RMT_NONE; s->maplength = 0; switch (avctx->pix_fmt) { case AV_PIX_FMT_MONOWHITE: s->depth = 1; break; case AV_PIX_FMT_PAL8 : s->maptype = RMT_EQUAL_RGB; s->maplength = 3 * 256; case AV_PIX_FMT_GRAY8: s->depth = 8; break; case AV_PIX_FMT_BGR24: s->depth = 24; break; default: return AVERROR_BUG; } s->length = avctx->height * (FFALIGN(avctx->width * s->depth, 16) >> 3); s->size = 32 + s->maplength + s->length * (s->type == RT_BYTE_ENCODED ? 2 : 1); return 0; } static int sunrast_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { SUNRASTContext *s = avctx->priv_data; int ret; if ((ret = ff_alloc_packet(avpkt, s->size)) < 0) return ret; bytestream2_init_writer(&s->p, avpkt->data, avpkt->size); sunrast_image_write_header(avctx); sunrast_image_write_image(avctx, frame->data[0], (const uint32_t *)frame->data[1], frame->linesize[0]); // update data length in header after RLE if (s->type == RT_BYTE_ENCODED) AV_WB32(&avpkt->data[16], s->length); *got_packet_ptr = 1; avpkt->flags |= AV_PKT_FLAG_KEY; avpkt->size = bytestream2_tell_p(&s->p); return 0; } static const AVCodecDefault sunrast_defaults[] = { { "coder", "rle" }, { NULL }, }; AVCodec ff_sunrast_encoder = { .name = "sunrast", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_SUNRAST, .priv_data_size = sizeof(SUNRASTContext), .init = sunrast_encode_init, .encode2 = sunrast_encode_frame, .defaults = sunrast_defaults, .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_BGR24, AV_PIX_FMT_PAL8, AV_PIX_FMT_GRAY8, AV_PIX_FMT_MONOWHITE, AV_PIX_FMT_NONE }, .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"), };