adding ffmpeg specific version

1 files changed, 190 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/8bps.c b/ffmpeg1/libavcodec/8bps.c
new file mode 100644
index 0000000..a910551
--- /dev/null
+++ b/ffmpeg1/libavcodec/8bps.c
@@ -0,0 +1,190 @@
+/*
+ * Quicktime Planar RGB (8BPS) Video Decoder
+ * Copyright (C) 2003 Roberto Togni
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * QT 8BPS Video Decoder by Roberto Togni
+ * 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 RGB32)
+ *         : RGB32 (RGB 32bpp, 4th plane is alpha)
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "internal.h"
+
+
+static const enum AVPixelFormat pixfmt_rgb24[] = {
+    AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE };
+
+typedef struct EightBpsContext {
+    AVCodecContext *avctx;
+
+    unsigned char planes;
+    unsigned char planemap[4];
+
+    uint32_t pal[256];
+} EightBpsContext;
+
+static int decode_frame(AVCodecContext *avctx, void *data,
+                        int *got_frame, AVPacket *avpkt)
+{
+    AVFrame *frame = data;
+    const uint8_t *buf = avpkt->data;
+    int buf_size       = avpkt->size;
+    EightBpsContext * const c = avctx->priv_data;
+    const unsigned char *encoded = buf;
+    unsigned char *pixptr, *pixptr_end;
+    unsigned int height = avctx->height; // Real image height
+    unsigned int dlen, p, row;
+    const unsigned char *lp, *dp;
+    unsigned char count;
+    unsigned int planes     = c->planes;
+    unsigned char *planemap = c->planemap;
+    int ret;
+
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+        return ret;
+
+    /* Set data pointer after line lengths */
+    dp = encoded + planes * (height << 1);
+
+    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 = frame->data[0] + row * frame->linesize[0] + planemap[p];
+            pixptr_end = pixptr + frame->linesize[0];
+            if(lp - encoded + row*2 + 1 >= buf_size)
+                return -1;
+            dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2));
+            /* Decode a row of this plane */
+            while (dlen > 0) {
+                if (dp + 1 >= buf + buf_size)
+                    return AVERROR_INVALIDDATA;
+                if ((count = *dp++) <= 127) {
+                    count++;
+                    dlen -= count + 1;
+                    if (pixptr + count * planes > pixptr_end)
+                        break;
+                    if (dp + count > buf + buf_size)
+                        return AVERROR_INVALIDDATA;
+                    while (count--) {
+                        *pixptr = *dp++;
+                        pixptr += planes;
+                    }
+                } else {
+                    count = 257 - count;
+                    if (pixptr + count * planes > pixptr_end)
+                        break;
+                    while (count--) {
+                        *pixptr = *dp;
+                        pixptr += planes;
+                    }
+                    dp++;
+                    dlen -= 2;
+                }
+            }
+        }
+    }
+
+    if (avctx->bits_per_coded_sample <= 8) {
+        const uint8_t *pal = av_packet_get_side_data(avpkt,
+                                                     AV_PKT_DATA_PALETTE,
+                                                     NULL);
+        if (pal) {
+            frame->palette_has_changed = 1;
+            memcpy(c->pal, pal, AVPALETTE_SIZE);
+        }
+
+        memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
+    }
+
+    *got_frame = 1;
+
+    /* always report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    EightBpsContext * const c = avctx->priv_data;
+
+    c->avctx       = avctx;
+
+    switch (avctx->bits_per_coded_sample) {
+    case 8:
+        avctx->pix_fmt = AV_PIX_FMT_PAL8;
+        c->planes      = 1;
+        c->planemap[0] = 0; // 1st plane is palette indexes
+        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 = AV_PIX_FMT_RGB32;
+        c->planes      = 4;
+#if HAVE_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_coded_sample);
+        return AVERROR_INVALIDDATA;
+    }
+
+    return 0;
+}
+
+AVCodec ff_eightbps_decoder = {
+    .name           = "8bps",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_8BPS,
+    .priv_data_size = sizeof(EightBpsContext),
+    .init           = decode_init,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
+};