adding ffmpeg specific version

1 files changed, 488 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/cinepak.c b/ffmpeg1/libavcodec/cinepak.c
new file mode 100644
index 0000000..f5bc113
--- /dev/null
+++ b/ffmpeg1/libavcodec/cinepak.c
@@ -0,0 +1,488 @@
+/*
+ * Cinepak Video Decoder
+ * Copyright (C) 2003 the ffmpeg project
+ *
+ * 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
+ * Cinepak video decoder
+ * @author Ewald Snel <ewald@rambo.its.tudelft.nl>
+ *
+ * @see For more information on the Cinepak algorithm, visit:
+ *   http://www.csse.monash.edu.au/~timf/
+ * @see For more information on the quirky data inside Sega FILM/CPK files, visit:
+ *   http://wiki.multimedia.cx/index.php?title=Sega_FILM
+ *
+ * Cinepak colorspace support (c) 2013 Rl, Aetey Global Technologies AB
+ * @author Cinepak colorspace, Rl, Aetey Global Technologies AB
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libavutil/common.h"
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "internal.h"
+
+
+typedef uint8_t cvid_codebook[12];
+
+#define MAX_STRIPS      32
+
+typedef struct {
+    uint16_t          id;
+    uint16_t          x1, y1;
+    uint16_t          x2, y2;
+    cvid_codebook     v4_codebook[256];
+    cvid_codebook     v1_codebook[256];
+} cvid_strip;
+
+typedef struct CinepakContext {
+
+    AVCodecContext *avctx;
+    AVFrame *frame;
+
+    const unsigned char *data;
+    int size;
+
+    int width, height;
+
+    int palette_video;
+    cvid_strip strips[MAX_STRIPS];
+
+    int sega_film_skip_bytes;
+
+    uint32_t pal[256];
+} CinepakContext;
+
+static void cinepak_decode_codebook (cvid_codebook *codebook,
+                                     int chunk_id, int size, const uint8_t *data)
+{
+    const uint8_t *eod = (data + size);
+    uint32_t flag, mask;
+    int      i, n;
+    uint8_t *p;
+
+    /* check if this chunk contains 4- or 6-element vectors */
+    n    = (chunk_id & 0x04) ? 4 : 6;
+    flag = 0;
+    mask = 0;
+
+    p = codebook[0];
+    for (i=0; i < 256; i++) {
+        if ((chunk_id & 0x01) && !(mask >>= 1)) {
+            if ((data + 4) > eod)
+                break;
+
+            flag  = AV_RB32 (data);
+            data += 4;
+            mask  = 0x80000000;
+        }
+
+        if (!(chunk_id & 0x01) || (flag & mask)) {
+            int k, kk;
+
+            if ((data + n) > eod)
+                break;
+
+            for (k = 0; k < 4; ++k) {
+                int r = *data++;
+                for (kk = 0; kk < 3; ++kk)
+                    *p++ = r;
+            }
+            if (n == 6) {
+                int r, g, b, u, v;
+                u = *(int8_t *)data++;
+                v = *(int8_t *)data++;
+                p -= 12;
+                for(k=0; k<4; ++k) {
+                    r = *p++ + v*2;
+                    g = *p++ - (u/2) - v;
+                    b = *p   + u*2;
+                    p -= 2;
+                    *p++ = av_clip_uint8(r);
+                    *p++ = av_clip_uint8(g);
+                    *p++ = av_clip_uint8(b);
+                }
+            }
+        } else {
+            p += 12;
+        }
+    }
+}
+
+static int cinepak_decode_vectors (CinepakContext *s, cvid_strip *strip,
+                                   int chunk_id, int size, const uint8_t *data)
+{
+    const uint8_t   *eod = (data + size);
+    uint32_t         flag, mask;
+    uint8_t         *cb0, *cb1, *cb2, *cb3;
+    unsigned int     x, y;
+    char            *ip0, *ip1, *ip2, *ip3;
+
+    flag = 0;
+    mask = 0;
+
+    for (y=strip->y1; y < strip->y2; y+=4) {
+
+/* take care of y dimension not being multiple of 4, such streams exist */
+        ip0 = ip1 = ip2 = ip3 = s->frame->data[0] +
+          (s->palette_video?strip->x1:strip->x1*3) + (y * s->frame->linesize[0]);
+        if(s->avctx->height - y > 1) {
+            ip1 = ip0 + s->frame->linesize[0];
+            if(s->avctx->height - y > 2) {
+                ip2 = ip1 + s->frame->linesize[0];
+                if(s->avctx->height - y > 3) {
+                    ip3 = ip2 + s->frame->linesize[0];
+                }
+            }
+        }
+/* to get the correct picture for not-multiple-of-4 cases let us fill
+ * each block from the bottom up, thus possibly overwriting the top line
+ * more than once but ending with the correct data in place
+ * (instead of in-loop checking) */
+
+        for (x=strip->x1; x < strip->x2; x+=4) {
+            if ((chunk_id & 0x01) && !(mask >>= 1)) {
+                if ((data + 4) > eod)
+                    return AVERROR_INVALIDDATA;
+
+                flag  = AV_RB32 (data);
+                data += 4;
+                mask  = 0x80000000;
+            }
+
+            if (!(chunk_id & 0x01) || (flag & mask)) {
+                if (!(chunk_id & 0x02) && !(mask >>= 1)) {
+                    if ((data + 4) > eod)
+                        return AVERROR_INVALIDDATA;
+
+                    flag  = AV_RB32 (data);
+                    data += 4;
+                    mask  = 0x80000000;
+                }
+
+                if ((chunk_id & 0x02) || (~flag & mask)) {
+                    uint8_t *p;
+                    if (data >= eod)
+                        return AVERROR_INVALIDDATA;
+
+                    p = strip->v1_codebook[*data++];
+                    if (s->palette_video) {
+                        ip3[0] = ip3[1] = ip2[0] = ip2[1] = p[6];
+                        ip3[2] = ip3[3] = ip2[2] = ip2[3] = p[9];
+                        ip1[0] = ip1[1] = ip0[0] = ip0[1] = p[0];
+                        ip1[2] = ip1[3] = ip0[2] = ip0[3] = p[3];
+                    } else {
+                        p += 6;
+                        memcpy(ip3 + 0, p, 3); memcpy(ip3 + 3, p, 3);
+                        memcpy(ip2 + 0, p, 3); memcpy(ip2 + 3, p, 3);
+                        p += 3; /* ... + 9 */
+                        memcpy(ip3 + 6, p, 3); memcpy(ip3 + 9, p, 3);
+                        memcpy(ip2 + 6, p, 3); memcpy(ip2 + 9, p, 3);
+                        p -= 9; /* ... + 0 */
+                        memcpy(ip1 + 0, p, 3); memcpy(ip1 + 3, p, 3);
+                        memcpy(ip0 + 0, p, 3); memcpy(ip0 + 3, p, 3);
+                        p += 3; /* ... + 3 */
+                        memcpy(ip1 + 6, p, 3); memcpy(ip1 + 9, p, 3);
+                        memcpy(ip0 + 6, p, 3); memcpy(ip0 + 9, p, 3);
+                    }
+
+                } else if (flag & mask) {
+                    if ((data + 4) > eod)
+                        return AVERROR_INVALIDDATA;
+
+                    cb0 = strip->v4_codebook[*data++];
+                    cb1 = strip->v4_codebook[*data++];
+                    cb2 = strip->v4_codebook[*data++];
+                    cb3 = strip->v4_codebook[*data++];
+                    if (s->palette_video) {
+                        uint8_t *p;
+                        p = ip3;
+                        *p++ = cb2[6];
+                        *p++ = cb2[9];
+                        *p++ = cb3[6];
+                        *p   = cb3[9];
+                        p = ip2;
+                        *p++ = cb2[0];
+                        *p++ = cb2[3];
+                        *p++ = cb3[0];
+                        *p   = cb3[3];
+                        p = ip1;
+                        *p++ = cb0[6];
+                        *p++ = cb0[9];
+                        *p++ = cb1[6];
+                        *p   = cb1[9];
+                        p = ip0;
+                        *p++ = cb0[0];
+                        *p++ = cb0[3];
+                        *p++ = cb1[0];
+                        *p   = cb1[3];
+                    } else {
+                        memcpy(ip3 + 0, cb2 + 6, 6);
+                        memcpy(ip3 + 6, cb3 + 6, 6);
+                        memcpy(ip2 + 0, cb2 + 0, 6);
+                        memcpy(ip2 + 6, cb3 + 0, 6);
+                        memcpy(ip1 + 0, cb0 + 6, 6);
+                        memcpy(ip1 + 6, cb1 + 6, 6);
+                        memcpy(ip0 + 0, cb0 + 0, 6);
+                        memcpy(ip0 + 6, cb1 + 0, 6);
+                    }
+
+                }
+            }
+
+            if (s->palette_video) {
+                ip0 += 4;  ip1 += 4;
+                ip2 += 4;  ip3 += 4;
+            } else {
+                ip0 += 12;  ip1 += 12;
+                ip2 += 12;  ip3 += 12;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int cinepak_decode_strip (CinepakContext *s,
+                                 cvid_strip *strip, const uint8_t *data, int size)
+{
+    const uint8_t *eod = (data + size);
+    int      chunk_id, chunk_size;
+
+    /* coordinate sanity checks */
+    if (strip->x2 > s->width   ||
+        strip->y2 > s->height  ||
+        strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
+        return AVERROR_INVALIDDATA;
+
+    while ((data + 4) <= eod) {
+        chunk_id   = data[0];
+        chunk_size = AV_RB24 (&data[1]) - 4;
+        if(chunk_size < 0)
+            return AVERROR_INVALIDDATA;
+
+        data      += 4;
+        chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
+
+        switch (chunk_id) {
+
+        case 0x20:
+        case 0x21:
+        case 0x24:
+        case 0x25:
+            cinepak_decode_codebook (strip->v4_codebook, chunk_id,
+                chunk_size, data);
+            break;
+
+        case 0x22:
+        case 0x23:
+        case 0x26:
+        case 0x27:
+            cinepak_decode_codebook (strip->v1_codebook, chunk_id,
+                chunk_size, data);
+            break;
+
+        case 0x30:
+        case 0x31:
+        case 0x32:
+            return cinepak_decode_vectors (s, strip, chunk_id,
+                chunk_size, data);
+        }
+
+        data += chunk_size;
+    }
+
+    return AVERROR_INVALIDDATA;
+}
+
+static int cinepak_decode (CinepakContext *s)
+{
+    const uint8_t  *eod = (s->data + s->size);
+    int           i, result, strip_size, frame_flags, num_strips;
+    int           y0 = 0;
+    int           encoded_buf_size;
+
+    if (s->size < 10)
+        return AVERROR_INVALIDDATA;
+
+    frame_flags = s->data[0];
+    num_strips  = AV_RB16 (&s->data[8]);
+    encoded_buf_size = AV_RB24(&s->data[1]);
+
+    /* if this is the first frame, check for deviant Sega FILM data */
+    if (s->sega_film_skip_bytes == -1) {
+        if (!encoded_buf_size) {
+            avpriv_request_sample(s->avctx, "encoded_buf_size 0");
+            return AVERROR_PATCHWELCOME;
+        }
+        if (encoded_buf_size != s->size && (s->size % encoded_buf_size) != 0) {
+            /* If the encoded frame size differs from the frame size as indicated
+             * by the container file, this data likely comes from a Sega FILM/CPK file.
+             * If the frame header is followed by the bytes FE 00 00 06 00 00 then
+             * this is probably one of the two known files that have 6 extra bytes
+             * after the frame header. Else, assume 2 extra bytes. The container
+             * size also cannot be a multiple of the encoded size. */
+            if (s->size >= 16 &&
+                (s->data[10] == 0xFE) &&
+                (s->data[11] == 0x00) &&
+                (s->data[12] == 0x00) &&
+                (s->data[13] == 0x06) &&
+                (s->data[14] == 0x00) &&
+                (s->data[15] == 0x00))
+                s->sega_film_skip_bytes = 6;
+            else
+                s->sega_film_skip_bytes = 2;
+        } else
+            s->sega_film_skip_bytes = 0;
+    }
+
+    s->data += 10 + s->sega_film_skip_bytes;
+
+    num_strips = FFMIN(num_strips, MAX_STRIPS);
+
+    s->frame->key_frame = 0;
+
+    for (i=0; i < num_strips; i++) {
+        if ((s->data + 12) > eod)
+            return AVERROR_INVALIDDATA;
+
+        s->strips[i].id = s->data[0];
+/* zero y1 means "relative to the previous stripe" */
+        if (!(s->strips[i].y1 = AV_RB16 (&s->data[4])))
+            s->strips[i].y2 = (s->strips[i].y1 = y0) + AV_RB16 (&s->data[8]);
+        else
+            s->strips[i].y2 = AV_RB16 (&s->data[8]);
+        s->strips[i].x1 = AV_RB16 (&s->data[6]);
+        s->strips[i].x2 = AV_RB16 (&s->data[10]);
+
+        if (s->strips[i].id == 0x10)
+            s->frame->key_frame = 1;
+
+        strip_size = AV_RB24 (&s->data[1]) - 12;
+        if (strip_size < 0)
+            return AVERROR_INVALIDDATA;
+        s->data   += 12;
+        strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;
+
+        if ((i > 0) && !(frame_flags & 0x01)) {
+            memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook,
+                sizeof(s->strips[i].v4_codebook));
+            memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook,
+                sizeof(s->strips[i].v1_codebook));
+        }
+
+        result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size);
+
+        if (result != 0)
+            return result;
+
+        s->data += strip_size;
+        y0    = s->strips[i].y2;
+    }
+    return 0;
+}
+
+static av_cold int cinepak_decode_init(AVCodecContext *avctx)
+{
+    CinepakContext *s = avctx->priv_data;
+
+    s->avctx = avctx;
+    s->width = (avctx->width + 3) & ~3;
+    s->height = (avctx->height + 3) & ~3;
+
+    s->sega_film_skip_bytes = -1;  /* uninitialized state */
+
+    // check for paletted data
+    if (avctx->bits_per_coded_sample != 8) {
+        s->palette_video = 0;
+        avctx->pix_fmt = AV_PIX_FMT_RGB24;
+    } else {
+        s->palette_video = 1;
+        avctx->pix_fmt = AV_PIX_FMT_PAL8;
+    }
+
+    s->frame = av_frame_alloc();
+    if (!s->frame)
+        return AVERROR(ENOMEM);
+
+    return 0;
+}
+
+static int cinepak_decode_frame(AVCodecContext *avctx,
+                                void *data, int *got_frame,
+                                AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int ret = 0, buf_size = avpkt->size;
+    CinepakContext *s = avctx->priv_data;
+
+    s->data = buf;
+    s->size = buf_size;
+
+    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
+        return ret;
+
+    if (s->palette_video) {
+        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+        if (pal) {
+            s->frame->palette_has_changed = 1;
+            memcpy(s->pal, pal, AVPALETTE_SIZE);
+        }
+    }
+
+    if ((ret = cinepak_decode(s)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "cinepak_decode failed\n");
+    }
+
+    if (s->palette_video)
+        memcpy (s->frame->data[1], s->pal, AVPALETTE_SIZE);
+
+    if ((ret = av_frame_ref(data, s->frame)) < 0)
+        return ret;
+
+    *got_frame = 1;
+
+    /* report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static av_cold int cinepak_decode_end(AVCodecContext *avctx)
+{
+    CinepakContext *s = avctx->priv_data;
+
+    av_frame_free(&s->frame);
+
+    return 0;
+}
+
+AVCodec ff_cinepak_decoder = {
+    .name           = "cinepak",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_CINEPAK,
+    .priv_data_size = sizeof(CinepakContext),
+    .init           = cinepak_decode_init,
+    .close          = cinepak_decode_end,
+    .decode         = cinepak_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Cinepak"),
+};