New demuxers: Sega FILM/CPK, Westwood VQA & AUD; new decoders: MS RLE &

Video-1, Apple RPZA, Cinepak, Westwood IMA ADPCM

Originally committed as revision 2324 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 456 insertions, 0 deletions

diff --git a/libavcodec/cinepak.c b/libavcodec/cinepak.c
new file mode 100644
index 0000000000..c34a2d5ff3
--- /dev/null
+++ b/libavcodec/cinepak.c
@@ -0,0 +1,456 @@
+/*
+ * Cinepak Video Decoder
+ * Copyright (C) 2003 the ffmpeg project
+ *
+ * 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 cinepak.c
+ * Cinepak video decoder
+ * by Ewald Snel <ewald@rambo.its.tudelft.nl>
+ * For more information on the Cinepak algorithm, visit:
+ *   http://www.csse.monash.edu.au/~timf/
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "avcodec.h"
+#include "dsputil.h"
+
+#define PALETTE_COUNT 256
+
+#define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
+#define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
+                   (((uint8_t*)(x))[1] << 16) | \
+                   (((uint8_t*)(x))[2] << 8) | \
+                    ((uint8_t*)(x))[3])
+
+typedef struct {
+    uint8_t  y0, y1, y2, y3;
+    uint8_t  u, v;
+} cvid_codebook_t;
+
+#define MAX_STRIPS      32
+
+typedef struct {
+    uint16_t          id;
+    uint16_t          x1, y1;
+    uint16_t          x2, y2;
+    cvid_codebook_t   v4_codebook[256];
+    cvid_codebook_t   v1_codebook[256];
+} cvid_strip_t;
+
+typedef struct CinepakContext {
+
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame frame;
+    AVFrame prev_frame;
+
+    unsigned char *data;
+    int size;
+
+    unsigned char palette[PALETTE_COUNT * 4];
+    int palette_video;
+    cvid_strip_t strips[MAX_STRIPS];
+
+} CinepakContext;
+
+static void cinepak_decode_codebook (cvid_codebook_t *codebook,
+                                     int chunk_id, int size, uint8_t *data)
+{
+    uint8_t *eod = (data + size);
+    uint32_t flag, mask;
+    int      i, n;
+
+    /* check if this chunk contains 4- or 6-element vectors */
+    n    = (chunk_id & 0x0400) ? 4 : 6;
+    flag = 0;
+    mask = 0;
+
+    for (i=0; i < 256; i++) {
+        if ((chunk_id & 0x0100) && !(mask >>= 1)) {
+            if ((data + 4) > eod)
+                break;
+
+            flag  = BE_32 (data);
+            data += 4;
+            mask  = 0x80000000;
+        }
+
+        if (!(chunk_id & 0x0100) || (flag & mask)) {
+            if ((data + n) > eod)
+                break;
+
+            if (n == 6) {
+                codebook[i].y0 = *data++;
+                codebook[i].y1 = *data++;
+                codebook[i].y2 = *data++;
+                codebook[i].y3 = *data++;
+                codebook[i].u  = 128 + *data++;
+                codebook[i].v  = 128 + *data++;
+            } else {
+                /* this codebook type indicates either greyscale or 
+                 * palettized video; if palettized, U & V components will
+                 * not be used so it is safe to set them to 128 for the
+                 * benefit of greyscale rendering in YUV420P */
+                codebook[i].y0 = *data++;
+                codebook[i].y1 = *data++;
+                codebook[i].y2 = *data++;
+                codebook[i].y3 = *data++;
+                codebook[i].u  = 128;
+                codebook[i].v  = 128;
+            }
+        }
+    }
+}
+
+static int cinepak_decode_vectors (CinepakContext *s, cvid_strip_t *strip,
+                                   int chunk_id, int size, uint8_t *data)
+{
+    uint8_t         *eod = (data + size);
+    uint32_t         flag, mask;
+    cvid_codebook_t *codebook;
+    unsigned int     i, j, x, y;
+    uint32_t         iy[4];
+    uint32_t         iu[2];
+    uint32_t         iv[2];
+
+    flag = 0;
+    mask = 0;
+
+    for (y=strip->y1; y < strip->y2; y+=4) {
+
+        iy[0] = strip->x1 + (y * s->frame.linesize[0]);
+        iy[1] = iy[0] + s->frame.linesize[0];
+        iy[2] = iy[1] + s->frame.linesize[0];
+        iy[3] = iy[2] + s->frame.linesize[0];
+        iu[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[1]);
+        iu[1] = iu[0] + s->frame.linesize[1];
+        iv[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[2]);
+        iv[1] = iv[0] + s->frame.linesize[2];
+
+        for (x=strip->x1; x < strip->x2; x+=4) {
+            if ((chunk_id & 0x0100) && !(mask >>= 1)) {
+                if ((data + 4) > eod)
+                    return -1;
+
+                flag  = BE_32 (data);
+                data += 4;
+                mask  = 0x80000000;
+            }
+
+            if (!(chunk_id & 0x0100) || (flag & mask)) {
+                if (!(chunk_id & 0x0200) && !(mask >>= 1)) {
+                    if ((data + 4) > eod)
+                        return -1;
+
+                    flag  = BE_32 (data);
+                    data += 4;
+                    mask  = 0x80000000;
+                }
+
+                if ((chunk_id & 0x0200) || (~flag & mask)) {
+                    if (data >= eod)
+                        return -1;
+
+                    codebook = &strip->v1_codebook[*data++];
+                    s->frame.data[0][iy[0] + 0] = codebook->y0;
+                    s->frame.data[0][iy[0] + 1] = codebook->y0;
+                    s->frame.data[0][iy[1] + 0] = codebook->y0;
+                    s->frame.data[0][iy[1] + 1] = codebook->y0;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[0]] = codebook->u;
+                        s->frame.data[2][iv[0]] = codebook->v;
+                    }
+
+                    s->frame.data[0][iy[0] + 2] = codebook->y0;
+                    s->frame.data[0][iy[0] + 3] = codebook->y0;
+                    s->frame.data[0][iy[1] + 2] = codebook->y0;
+                    s->frame.data[0][iy[1] + 3] = codebook->y0;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[0] + 1] = codebook->u;
+                        s->frame.data[2][iv[0] + 1] = codebook->v;
+                    }
+
+                    s->frame.data[0][iy[2] + 0] = codebook->y0;
+                    s->frame.data[0][iy[2] + 1] = codebook->y0;
+                    s->frame.data[0][iy[3] + 0] = codebook->y0;
+                    s->frame.data[0][iy[3] + 1] = codebook->y0;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[1]] = codebook->u;
+                        s->frame.data[2][iv[1]] = codebook->v;
+                    }
+
+                    s->frame.data[0][iy[2] + 2] = codebook->y0;
+                    s->frame.data[0][iy[2] + 3] = codebook->y0;
+                    s->frame.data[0][iy[3] + 2] = codebook->y0;
+                    s->frame.data[0][iy[3] + 3] = codebook->y0;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[1] + 1] = codebook->u;
+                        s->frame.data[2][iv[1] + 1] = codebook->v;
+                    }
+
+                } else if (flag & mask) {
+                    if ((data + 4) > eod)
+                        return -1;
+
+                    codebook = &strip->v4_codebook[*data++];
+                    s->frame.data[0][iy[0] + 0] = codebook->y0;
+                    s->frame.data[0][iy[0] + 1] = codebook->y1;
+                    s->frame.data[0][iy[1] + 0] = codebook->y2;
+                    s->frame.data[0][iy[1] + 1] = codebook->y3;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[0]] = codebook->u;
+                        s->frame.data[2][iv[0]] = codebook->v;
+                    }
+
+                    codebook = &strip->v4_codebook[*data++];
+                    s->frame.data[0][iy[0] + 2] = codebook->y0;
+                    s->frame.data[0][iy[0] + 3] = codebook->y1;
+                    s->frame.data[0][iy[1] + 2] = codebook->y2;
+                    s->frame.data[0][iy[1] + 3] = codebook->y3;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[0] + 1] = codebook->u;
+                        s->frame.data[2][iv[0] + 1] = codebook->v;
+                    }
+
+                    codebook = &strip->v4_codebook[*data++];
+                    s->frame.data[0][iy[2] + 0] = codebook->y0;
+                    s->frame.data[0][iy[2] + 1] = codebook->y1;
+                    s->frame.data[0][iy[3] + 0] = codebook->y2;
+                    s->frame.data[0][iy[3] + 1] = codebook->y3;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[1]] = codebook->u;
+                        s->frame.data[2][iv[1]] = codebook->v;
+                    }
+
+                    codebook = &strip->v4_codebook[*data++];
+                    s->frame.data[0][iy[2] + 2] = codebook->y0;
+                    s->frame.data[0][iy[2] + 3] = codebook->y1;
+                    s->frame.data[0][iy[3] + 2] = codebook->y2;
+                    s->frame.data[0][iy[3] + 3] = codebook->y3;
+                    if (!s->palette_video) {
+                        s->frame.data[1][iu[1] + 1] = codebook->u;
+                        s->frame.data[2][iv[1] + 1] = codebook->v;
+                    }
+
+                }
+            } else {
+                /* copy from the previous frame */
+                for (i = 0; i < 4; i++) {
+                    for (j = 0; j < 4; j++) {
+                        s->frame.data[0][iy[i] + j] =
+                            s->prev_frame.data[0][iy[i] + j];
+                    }
+                }
+                for (i = 0; i < 2; i++) {
+                    for (j = 0; j < 2; j++) {
+                        s->frame.data[1][iu[i] + j] =
+                            s->prev_frame.data[1][iu[i] + j];
+                        s->frame.data[2][iv[i] + j] =
+                            s->prev_frame.data[2][iv[i] + j];
+                    }
+                }
+            }
+
+            iy[0] += 4;  iy[1] += 4;
+            iy[2] += 4;  iy[3] += 4;
+            iu[0] += 2;  iu[1] += 2;
+            iv[0] += 2;  iv[1] += 2;
+        }
+    }
+
+    return 0;
+}
+
+static int cinepak_decode_strip (CinepakContext *s,
+                                 cvid_strip_t *strip, uint8_t *data, int size)
+{
+    uint8_t *eod = (data + size);
+    int      chunk_id, chunk_size;
+
+    /* coordinate sanity checks */
+    if (strip->x1 >= s->avctx->width  || strip->x2 > s->avctx->width  ||
+        strip->y1 >= s->avctx->height || strip->y2 > s->avctx->height ||
+        strip->x1 >= strip->x2        || strip->y1 >= strip->y2)
+        return -1;
+
+    while ((data + 4) <= eod) {
+        chunk_id   = BE_16 (&data[0]);
+        chunk_size = BE_16 (&data[2]) - 4;
+        data      += 4;
+        chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
+
+        switch (chunk_id) {
+
+        case 0x2000:
+        case 0x2100:
+        case 0x2400:
+        case 0x2500:
+            cinepak_decode_codebook (strip->v4_codebook, chunk_id, 
+                chunk_size, data);
+            break;
+
+        case 0x2200:
+        case 0x2300:
+        case 0x2600:
+        case 0x2700:
+            cinepak_decode_codebook (strip->v1_codebook, chunk_id, 
+                chunk_size, data);
+            break;
+
+        case 0x3000:
+        case 0x3100:
+        case 0x3200:
+            return cinepak_decode_vectors (s, strip, chunk_id, 
+                chunk_size, data);
+        }
+
+        data += chunk_size;
+    }
+
+    return -1;
+}
+
+static int cinepak_decode (CinepakContext *s)
+{
+    uint8_t      *eod = (s->data + s->size);
+    int           i, result, strip_size, frame_flags, num_strips;
+    int           y0 = 0;
+
+    if (s->size < 10)
+        return -1;
+
+    frame_flags = s->data[0];
+    num_strips  = BE_16 (&s->data[8]);
+    s->data    += 10;
+
+    if (num_strips > MAX_STRIPS)
+        num_strips = MAX_STRIPS;
+
+    for (i=0; i < num_strips; i++) {
+        if ((s->data + 12) > eod)
+            return -1;
+
+        s->strips[i].id = BE_16 (s->data);
+        s->strips[i].y1 = y0;
+        s->strips[i].x1 = 0;
+        s->strips[i].y2 = y0 + BE_16 (&s->data[8]);
+        s->strips[i].x2 = s->avctx->width;
+
+        strip_size = BE_16 (&s->data[2]) - 12;
+        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 int cinepak_decode_init(AVCodecContext *avctx)
+{
+    CinepakContext *s = (CinepakContext *)avctx->priv_data;
+/*
+    int i;
+    unsigned char r, g, b;
+    unsigned char *raw_palette;
+    unsigned int *palette32;
+*/
+
+    s->avctx = avctx;
+
+// check for paletted data
+s->palette_video = 0;
+
+
+    avctx->pix_fmt = PIX_FMT_YUV420P;
+    avctx->has_b_frames = 0;
+    dsputil_init(&s->dsp, avctx);
+
+    s->frame.data[0] = s->prev_frame.data[0] = NULL;
+
+    return 0;
+}
+
+static int cinepak_decode_frame(AVCodecContext *avctx,
+                                void *data, int *data_size,
+                                uint8_t *buf, int buf_size)
+{
+    CinepakContext *s = (CinepakContext *)avctx->priv_data;
+
+    s->data = buf;
+    s->size = buf_size;
+
+    if (avctx->get_buffer(avctx, &s->frame)) {
+        printf ("  Cinepak: get_buffer() failed\n");
+        return -1;
+    }
+
+    cinepak_decode(s);
+
+    if (s->prev_frame.data[0])
+        avctx->release_buffer(avctx, &s->prev_frame);
+
+    /* shuffle frames */
+    s->prev_frame = s->frame;
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame*)data = s->frame;
+
+    /* report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static int cinepak_decode_end(AVCodecContext *avctx)
+{
+    CinepakContext *s = (CinepakContext *)avctx->priv_data;
+
+    if (s->prev_frame.data[0])
+        avctx->release_buffer(avctx, &s->prev_frame);
+
+    return 0;
+}
+
+AVCodec cinepak_decoder = {
+    "cinepak",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_CINEPAK,
+    sizeof(CinepakContext),
+    cinepak_decode_init,
+    NULL,
+    cinepak_decode_end,
+    cinepak_decode_frame,
+    CODEC_CAP_DR1,
+};