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, 310 insertions, 0 deletions

diff --git a/libavcodec/rpza.c b/libavcodec/rpza.c
new file mode 100644
index 0000000000..8027cfd9ab
--- /dev/null
+++ b/libavcodec/rpza.c
@@ -0,0 +1,310 @@
+/*
+ * Quicktime Video (RPZA) 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 rpza.c
+ * QT RPZA Video Decoder by Roberto Togni <rtogni@bresciaonline.it>
+ * For more information about the RPZA format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ *
+ * The RPZA decoder outputs RGB555 colorspace data.
+ *
+ * Note that this decoder reads big endian RGB555 pixel values from the
+ * bytestream, arranges them in the host's endian order, and outputs
+ * them to the final rendered map in the same host endian order. This is
+ * intended behavior as the ffmpeg documentation states that RGB555 pixels
+ * shall be stored in native CPU endianness.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "avcodec.h"
+#include "dsputil.h"
+
+typedef struct RpzaContext {
+
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame frame;
+    AVFrame prev_frame;
+
+    unsigned char *buf;
+    int size;
+
+} RpzaContext;
+
+#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])
+
+#define ADVANCE_BLOCK() \
+{ \
+    pixel_ptr += 4; \
+    if (pixel_ptr >= width) \
+    { \
+        pixel_ptr = 0; \
+        row_ptr += stride * 4; \
+    } \
+    total_blocks--; \
+    if (total_blocks < 0) \
+    { \
+        printf("warning: block counter just went negative (this should not happen)\n"); \
+        return; \
+    } \
+}
+
+static void rpza_decode_stream(RpzaContext *s)
+{
+    int width = s->avctx->width;
+    int stride = s->frame.linesize[0] / 2;
+    int row_inc = stride - 4;
+    int stream_ptr = 0;
+    int chunk_size;
+    unsigned char opcode;
+    int n_blocks;
+    unsigned short colorA = 0, colorB;
+    unsigned short color4[4];
+    unsigned char index, idx;
+    unsigned short ta, tb;
+    unsigned short *pixels = (unsigned short *)s->frame.data[0];
+    unsigned short *prev_pixels = (unsigned short *)s->prev_frame.data[0];
+
+    int row_ptr = 0;
+    int pixel_ptr = 0;
+    int block_ptr;
+    int pixel_x, pixel_y;
+    int total_blocks;
+
+    /* First byte is always 0xe1. Warn if it's different */
+    if (s->buf[stream_ptr] != 0xe1)
+        printf("First chunk byte is 0x%02x instead of 0x1e\n",
+            s->buf[stream_ptr]);
+
+    /* Get chunk size, ingnoring first byte */
+    chunk_size = BE_32(&s->buf[stream_ptr]) & 0x00FFFFFF;
+    stream_ptr += 4;
+
+    /* If length mismatch use size from MOV file and try to decode anyway */
+    if (chunk_size != s->size)
+        printf("MOV chunk size != encoded chunk size; using MOV chunk size\n");
+
+    chunk_size = s->size;
+
+    /* Number of 4x4 blocks in frame. */
+    total_blocks = (s->avctx->width * s->avctx->height) / (4 * 4);
+
+    /* Process chunk data */
+    while (stream_ptr < chunk_size) {
+        opcode = s->buf[stream_ptr++]; /* Get opcode */
+
+        n_blocks = (opcode & 0x1f) + 1; /* Extract block counter from opcode */
+
+        /* If opcode MSbit is 0, we need more data to decide what to do */
+        if ((opcode & 0x80) == 0) {
+            colorA = (opcode << 8) | (s->buf[stream_ptr++]);
+            opcode = 0;
+            if ((s->buf[stream_ptr] & 0x80) != 0) {
+                /* Must behave as opcode 110xxxxx, using colorA computed 
+                 * above. Use fake opcode 0x20 to enter switch block at 
+                 * the right place */
+                opcode = 0x20;
+                n_blocks = 1;
+            }
+        }
+
+        switch (opcode & 0xe0) {
+
+        /* Skip blocks */
+        case 0x80:
+            while (n_blocks--) {
+                block_ptr = row_ptr + pixel_ptr;
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++){
+                        pixels[block_ptr] = prev_pixels[block_ptr];
+                        block_ptr++;
+                    }
+                    block_ptr += row_inc;
+                }
+                ADVANCE_BLOCK();
+            }
+            break;
+
+        /* Fill blocks with one color */
+        case 0xa0:
+            colorA = BE_16 (&s->buf[stream_ptr]);
+            stream_ptr += 2;
+            while (n_blocks--) {
+                block_ptr = row_ptr + pixel_ptr;
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++){
+                        pixels[block_ptr] = colorA;
+                        block_ptr++;
+                    }
+                    block_ptr += row_inc;
+                }
+                ADVANCE_BLOCK();
+            }
+            break;
+
+        /* Fill blocks with 4 colors */
+        case 0xc0:
+            colorA = BE_16 (&s->buf[stream_ptr]);
+            stream_ptr += 2;
+        case 0x20:
+            colorB = BE_16 (&s->buf[stream_ptr]);
+            stream_ptr += 2;
+
+            /* sort out the colors */
+            color4[0] = colorB;
+            color4[1] = 0;
+            color4[2] = 0;
+            color4[3] = colorA;
+
+            /* red components */
+            ta = (colorA >> 10) & 0x1F;
+            tb = (colorB >> 10) & 0x1F;
+            color4[1] |= ((11 * ta + 21 * tb) >> 5) << 10;
+            color4[2] |= ((21 * ta + 11 * tb) >> 5) << 10;
+
+            /* green components */
+            ta = (colorA >> 5) & 0x1F;
+            tb = (colorB >> 5) & 0x1F;
+            color4[1] |= ((11 * ta + 21 * tb) >> 5) << 5;
+            color4[2] |= ((21 * ta + 11 * tb) >> 5) << 5;
+
+            /* blue components */
+            ta = colorA & 0x1F;
+            tb = colorB & 0x1F;
+            color4[1] |= ((11 * ta + 21 * tb) >> 5);
+            color4[2] |= ((21 * ta + 11 * tb) >> 5);
+
+            while (n_blocks--) {
+                block_ptr = row_ptr + pixel_ptr;
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    index = s->buf[stream_ptr++];
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++){
+                        idx = (index >> (2 * (3 - pixel_x))) & 0x03;
+                        pixels[block_ptr] = color4[idx];
+                        block_ptr++;
+                    }
+                    block_ptr += row_inc;
+                }
+                ADVANCE_BLOCK();
+            }
+            break;
+
+        /* Fill block with 16 colors */
+        case 0x00:
+            block_ptr = row_ptr + pixel_ptr;
+            for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                for (pixel_x = 0; pixel_x < 4; pixel_x++){
+                    /* We already have color of upper left pixel */
+                    if ((pixel_y != 0) || (pixel_x !=0)) {
+                        colorA = BE_16 (&s->buf[stream_ptr]);
+                        stream_ptr += 2;
+                    }
+                    pixels[block_ptr] = colorA;
+                    block_ptr++;
+                }
+                block_ptr += row_inc;
+            }
+            ADVANCE_BLOCK();
+            break;
+
+        /* Unknown opcode */
+        default:
+            printf("Unknown opcode %d in rpza chunk."
+                 " Skip remaining %d bytes of chunk data.\n", opcode,
+                 chunk_size - stream_ptr);
+            return;
+        } /* Opcode switch */
+    }
+}
+
+static int rpza_decode_init(AVCodecContext *avctx)
+{
+    RpzaContext *s = (RpzaContext *)avctx->priv_data;
+
+    s->avctx = avctx;
+    avctx->pix_fmt = PIX_FMT_RGB555;
+    avctx->has_b_frames = 0;
+    dsputil_init(&s->dsp, avctx);
+
+    s->frame.data[0] = s->prev_frame.data[0] = NULL;
+
+    return 0;
+}
+
+static int rpza_decode_frame(AVCodecContext *avctx,
+                             void *data, int *data_size,
+                             uint8_t *buf, int buf_size)
+{
+    RpzaContext *s = (RpzaContext *)avctx->priv_data;
+
+    s->buf = buf;
+    s->size = buf_size;
+
+    if (avctx->get_buffer(avctx, &s->frame)) {
+        printf ("  RPZA Video: get_buffer() failed\n");
+        return -1;
+    }
+
+    rpza_decode_stream(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;
+
+    /* always report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static int rpza_decode_end(AVCodecContext *avctx)
+{
+    RpzaContext *s = (RpzaContext *)avctx->priv_data;
+
+    if (s->prev_frame.data[0])
+        avctx->release_buffer(avctx, &s->prev_frame);
+
+    return 0;
+}
+
+AVCodec rpza_decoder = {
+    "rpza",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_RPZA,
+    sizeof(RpzaContext),
+    rpza_decode_init,
+    NULL,
+    rpza_decode_end,
+    rpza_decode_frame,
+    CODEC_CAP_DR1,
+};