--- /dev/null
+/*
+ * Quicktime Planar RGB (8BPS) Video Decoder
+ * Copyright (C) 2003 Roberto Togni
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/**
+ * @file 8bps.c
+ * QT 8BPS Video Decoder by Roberto Togni <rtogni at bresciaonline dot it>
+ * For more information about the 8BPS format, visit:
+ * http://www.pcisys.net/~melanson/codecs/
+ *
+ * Supports: PAL8 (RGB 8bpp, paletted)
+ * : BGR24 (RGB 24bpp) (can also output it as RGBA32)
+ * : RGBA32 (RGB 32bpp, 4th plane is probably alpha and it's ignored)
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "common.h"
+#include "avcodec.h"
+
+
+const enum PixelFormat pixfmt_rgb24[] = {PIX_FMT_BGR24, PIX_FMT_RGBA32, -1};
+
+/*
+ * Decoder context
+ */
+typedef struct EightBpsContext {
+
+ AVCodecContext *avctx;
+ AVFrame pic;
+
+ unsigned char planes;
+ unsigned char planemap[4];
+} EightBpsContext;
+
+
+/*
+ *
+ * Decode a frame
+ *
+ */
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
+{
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+ unsigned char *encoded = (unsigned char *)buf;
+ unsigned char *pixptr;
+ unsigned int height = avctx->height; // Real image height
+ unsigned int dlen, p, row;
+ unsigned char *lp, *dp;
+ unsigned char count;
+ unsigned int px_inc;
+ unsigned int planes = c->planes;
+ unsigned char *planemap = c->planemap;
+
+
+ /* no supplementary picture */
+ if (buf_size == 0)
+ return 0;
+
+ if(c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ c->pic.reference = 0;
+ c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
+ if(avctx->get_buffer(avctx, &c->pic) < 0){
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+
+ /* Set data pointer after line lengths */
+ dp = encoded + planes * (height << 1);
+
+ /* Ignore alpha plane, don't know what to do with it */
+ if (planes == 4)
+ planes--;
+
+ px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGBA32);
+
+ for (p = 0; p < planes; p++) {
+ /* Lines length pointer for this plane */
+ lp = encoded + p * (height << 1);
+
+ /* Decode a plane */
+ for(row = 0; row < height; row++) {
+ pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
+ dlen = be2me_16(*(unsigned short *)(lp+row*2));
+ /* Decode a row of this plane */
+ while(dlen > 0) {
+ if ((count = *dp++) <= 127) {
+ count++;
+ dlen -= count + 1;
+ while(count--) {
+ *pixptr = *dp++;
+ pixptr += px_inc;
+ }
+ } else {
+ count = 257 - count;
+ while(count--) {
+ *pixptr = *dp;
+ pixptr += px_inc;
+ }
+ dp++;
+ dlen -= 2;
+ }
+ }
+ }
+ }
+
+ if (avctx->palctrl) {
+ memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+ if (avctx->palctrl->palette_changed) {
+ c->pic.palette_has_changed = 1;
+ avctx->palctrl->palette_changed = 0;
+ } else
+ c->pic.palette_has_changed = 0;
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = c->pic;
+
+ /* always report that the buffer was completely consumed */
+ return buf_size;
+}
+
+
+/*
+ *
+ * Init 8BPS decoder
+ *
+ */
+static int decode_init(AVCodecContext *avctx)
+{
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+
+ c->avctx = avctx;
+ avctx->has_b_frames = 0;
+
+ c->pic.data[0] = NULL;
+
+ switch (avctx->bits_per_sample) {
+ case 8:
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ c->planes = 1;
+ c->planemap[0] = 0; // 1st plane is palette indexes
+ if (avctx->palctrl == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n");
+ return -1;
+ }
+ break;
+ case 24:
+ avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
+ c->planes = 3;
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ break;
+ case 32:
+ avctx->pix_fmt = PIX_FMT_RGBA32;
+ c->planes = 4;
+#ifdef WORDS_BIGENDIAN
+ c->planemap[0] = 1; // 1st plane is red
+ c->planemap[1] = 2; // 2nd plane is green
+ c->planemap[2] = 3; // 3rd plane is blue
+ c->planemap[3] = 0; // 4th plane is alpha???
+#else
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ c->planemap[3] = 3; // 4th plane is alpha???
+#endif
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_sample);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+
+
+/*
+ *
+ * Uninit 8BPS decoder
+ *
+ */
+static int decode_end(AVCodecContext *avctx)
+{
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ return 0;
+}
+
+
+
+AVCodec eightbps_decoder = {
+ "8bps",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_8BPS,
+ sizeof(EightBpsContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
+};
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