--- /dev/null
+/*
+ * 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 *end = pixels + avctx->height * linesize;
+
+ ptr = pixels;
+
+#define GET_VALUE ptr >= end ? 0 : x >= len ? ptr[len-1] : ptr[x]
+
+ x = 0;
+ value2 = GET_VALUE;
+ while (ptr < end) {
+ run = 1;
+ value = value2;
+ x++;
+ if (x >= alen) {
+ x = 0;
+ ptr += linesize;
+ }
+
+ value2 = GET_VALUE;
+ while (value2 == value && run < 256 && ptr < end) {
+ 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 PIX_FMT_MONOWHITE:
+ s->depth = 1;
+ break;
+ case PIX_FMT_PAL8 :
+ s->maptype = RMT_EQUAL_RGB;
+ s->maplength = 3 * 256;
+ case PIX_FMT_GRAY8:
+ s->depth = 8;
+ break;
+ case 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->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 = CODEC_ID_SUNRAST,
+ .priv_data_size = sizeof(SUNRASTContext),
+ .init = sunrast_encode_init,
+ .encode2 = sunrast_encode_frame,
+ .defaults = sunrast_defaults,
+ .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_BGR24,
+ PIX_FMT_PAL8,
+ PIX_FMT_GRAY8,
+ PIX_FMT_MONOWHITE,
+ PIX_FMT_NONE },
+ .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"),
+};
projects / platform / upstream / libav.git / commitdiff