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, 378 insertions, 0 deletions

diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c
new file mode 100644
index 0000000000..71d8af9870
--- /dev/null
+++ b/libavcodec/msvideo1.c
@@ -0,0 +1,378 @@
+/*
+ * Microsoft Video-1 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 msvideo1.c
+ * Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
+ * For more information about the MS Video-1 format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ *
+ * This decoder outputs either PAL8 or RGB555 data, depending on the
+ * whether a RGB palette was passed through via extradata; if the extradata
+ * is present, then the data is PAL8; RGB555 otherwise.
+ */
+
+#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 LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
+#define CHECK_STREAM_PTR(n) \
+  if ((stream_ptr + n) > s->size ) { \
+    printf (" MS Video-1 warning: stream_ptr out of bounds (%d >= %d)\n", \
+      stream_ptr + n, s->size); \
+    return; \
+  }
+
+#define COPY_PREV_BLOCK() \
+    pixel_ptr = block_ptr; \
+    for (pixel_y = 0; pixel_y < 4; pixel_y++) { \
+        for (pixel_x = 0; pixel_x < 4; pixel_x++, pixel_ptr++) \
+            pixels[pixel_ptr] = prev_pixels[pixel_ptr]; \
+        pixel_ptr -= row_dec; \
+    }
+
+typedef struct Msvideo1Context {
+
+    AVCodecContext *avctx;
+    DSPContext dsp;
+    AVFrame frame;
+    AVFrame prev_frame;
+
+    unsigned char *buf;
+    int size;
+
+    int mode_8bit;  /* if it's not 8-bit, it's 16-bit */
+    unsigned char palette[PALETTE_COUNT * 4];
+
+} Msvideo1Context;
+
+static int msvideo1_decode_init(AVCodecContext *avctx)
+{
+    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+    int i;
+    unsigned char r, g, b;
+    unsigned char *raw_palette;
+    unsigned int *palette32;
+
+    s->avctx = avctx;
+
+    /* figure out the colorspace based on the presence of a palette in
+     * extradata */
+    if (s->avctx->extradata_size) {
+        s->mode_8bit = 1;
+        /* load up the palette */
+        palette32 = (unsigned int *)s->palette;
+        raw_palette = (unsigned char *)s->avctx->extradata;
+        for (i = 0; i < s->avctx->extradata_size / 4; i++) {
+            b = *raw_palette++;
+            g = *raw_palette++;
+            r = *raw_palette++;
+            raw_palette++;
+            palette32[i] = (r << 16) | (g << 8) | (b);
+        }
+        avctx->pix_fmt = PIX_FMT_PAL8;
+    } else {
+        s->mode_8bit = 0;
+        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 void msvideo1_decode_8bit(Msvideo1Context *s)
+{
+    int block_ptr, pixel_ptr;
+    int total_blocks;
+    int pixel_x, pixel_y;  /* pixel width and height iterators */
+    int block_x, block_y;  /* block width and height iterators */
+    int blocks_wide, blocks_high;  /* width and height in 4x4 blocks */
+    int block_inc;
+    int row_dec;
+
+    /* decoding parameters */
+    int stream_ptr;
+    unsigned char byte_a, byte_b;
+    unsigned short flags;
+    int skip_blocks;
+    unsigned char colors[8];
+    unsigned char *pixels = s->frame.data[0];
+    unsigned char *prev_pixels = s->prev_frame.data[0];
+    int stride = s->frame.linesize[0];
+
+    stream_ptr = 0;
+    skip_blocks = 0;
+    blocks_wide = s->avctx->width / 4;
+    blocks_high = s->avctx->height / 4;
+    total_blocks = blocks_wide * blocks_high;
+    block_inc = 4;
+    row_dec = stride + 4;
+
+    for (block_y = blocks_high; block_y > 0; block_y--) {
+        block_ptr = ((block_y * 4) - 1) * stride;
+        for (block_x = blocks_wide; block_x > 0; block_x--) {
+            /* check if this block should be skipped */
+            if (skip_blocks) {
+                COPY_PREV_BLOCK();
+                block_ptr += block_inc;
+                skip_blocks--;
+                total_blocks--;
+                continue;
+            }
+
+            pixel_ptr = block_ptr;
+
+            /* get the next two bytes in the encoded data stream */
+            CHECK_STREAM_PTR(2);
+            byte_a = s->buf[stream_ptr++];
+            byte_b = s->buf[stream_ptr++];
+
+            /* check if the decode is finished */
+            if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0))
+                return;
+            else if ((byte_b & 0xFC) == 0x84) {
+                /* skip code, but don't count the current block */
+                skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
+                COPY_PREV_BLOCK();
+            } else if (byte_b < 0x80) {
+                /* 2-color encoding */
+                flags = (byte_b << 8) | byte_a;
+
+                CHECK_STREAM_PTR(2);
+                colors[0] = s->buf[stream_ptr++];
+                colors[1] = s->buf[stream_ptr++];
+
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
+                        pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
+                    pixel_ptr -= row_dec;
+                }
+            } else if (byte_b >= 0x90) {
+                /* 8-color encoding */
+                flags = (byte_b << 8) | byte_a;
+
+                CHECK_STREAM_PTR(8);
+                memcpy(colors, &s->buf[stream_ptr], 8);
+                stream_ptr += 8;
+
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
+                        pixels[pixel_ptr++] = 
+                            colors[((pixel_y & 0x2) << 1) + 
+                                (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
+                    pixel_ptr -= row_dec;
+                }
+            } else {
+                /* 1-color encoding */
+                colors[0] = byte_a;
+
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++)
+                        pixels[pixel_ptr++] = colors[0];
+                    pixel_ptr -= row_dec;
+                }
+            }
+
+            block_ptr += block_inc;
+            total_blocks--;
+        }
+    }
+
+    /* make the palette available on the way out */
+    if (s->avctx->pix_fmt == PIX_FMT_PAL8)
+        memcpy(s->frame.data[1], s->palette, PALETTE_COUNT * 4);
+}
+
+static void msvideo1_decode_16bit(Msvideo1Context *s)
+{
+    int block_ptr, pixel_ptr;
+    int total_blocks;
+    int pixel_x, pixel_y;  /* pixel width and height iterators */
+    int block_x, block_y;  /* block width and height iterators */
+    int blocks_wide, blocks_high;  /* width and height in 4x4 blocks */
+    int block_inc;
+    int row_dec;
+
+    /* decoding parameters */
+    int stream_ptr;
+    unsigned char byte_a, byte_b;
+    unsigned short flags;
+    int skip_blocks;
+    unsigned short colors[8];
+    unsigned short *pixels = (unsigned short *)s->frame.data[0];
+    unsigned short *prev_pixels = (unsigned short *)s->prev_frame.data[0];
+    int stride = s->frame.linesize[0] / 2;
+
+    stream_ptr = 0;
+    skip_blocks = 0;
+    blocks_wide = s->avctx->width / 4;
+    blocks_high = s->avctx->height / 4;
+    total_blocks = blocks_wide * blocks_high;
+    block_inc = 4;
+    row_dec = stride + 4;
+
+    for (block_y = blocks_high; block_y > 0; block_y--) {
+        block_ptr = ((block_y * 4) - 1) * stride;
+        for (block_x = blocks_wide; block_x > 0; block_x--) {
+            /* check if this block should be skipped */
+            if (skip_blocks) {
+                COPY_PREV_BLOCK();
+                block_ptr += block_inc;
+                skip_blocks--;
+                total_blocks--;
+                continue;
+            }
+
+            pixel_ptr = block_ptr;
+
+            /* get the next two bytes in the encoded data stream */
+            CHECK_STREAM_PTR(2);
+            byte_a = s->buf[stream_ptr++];
+            byte_b = s->buf[stream_ptr++];
+
+            /* check if the decode is finished */
+            if ((byte_a == 0) && (byte_b == 0) && (total_blocks == 0)) {
+                return;
+            } else if ((byte_b & 0xFC) == 0x84) {
+                /* skip code, but don't count the current block */
+                skip_blocks = ((byte_b - 0x84) << 8) + byte_a - 1;
+                COPY_PREV_BLOCK();
+            } else if (byte_b < 0x80) {
+                /* 2- or 8-color encoding modes */
+                flags = (byte_b << 8) | byte_a;
+
+                CHECK_STREAM_PTR(4);
+                colors[0] = LE_16(&s->buf[stream_ptr]);
+                stream_ptr += 2;
+                colors[1] = LE_16(&s->buf[stream_ptr]);
+                stream_ptr += 2;
+
+                if (colors[0] & 0x8000) {
+                    /* 8-color encoding */
+                    CHECK_STREAM_PTR(12);
+                    colors[2] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+                    colors[3] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+                    colors[4] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+                    colors[5] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+                    colors[6] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+                    colors[7] = LE_16(&s->buf[stream_ptr]);
+                    stream_ptr += 2;
+
+                    for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                        for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
+                            pixels[pixel_ptr++] = 
+                                colors[((pixel_y & 0x2) << 1) + 
+                                    (pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
+                        pixel_ptr -= row_dec;
+                    }
+                } else {
+                    /* 2-color encoding */
+                    for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                        for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
+                            pixels[pixel_ptr++] = colors[(flags & 0x1) ^ 1];
+                        pixel_ptr -= row_dec;
+                    }
+                }
+            } else {
+                /* otherwise, it's a 1-color block */
+                colors[0] = (byte_b << 8) | byte_a;
+
+                for (pixel_y = 0; pixel_y < 4; pixel_y++) {
+                    for (pixel_x = 0; pixel_x < 4; pixel_x++)
+                        pixels[pixel_ptr++] = colors[0];
+                    pixel_ptr -= row_dec;
+                }
+            }
+
+            block_ptr += block_inc;
+            total_blocks--;
+        }
+    }
+}
+
+static int msvideo1_decode_frame(AVCodecContext *avctx,
+                                void *data, int *data_size,
+                                uint8_t *buf, int buf_size)
+{
+    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+
+    s->buf = buf;
+    s->size = buf_size;
+
+    if (avctx->get_buffer(avctx, &s->frame)) {
+        printf ("  MS Video-1 Video: get_buffer() failed\n");
+        return -1;
+    }
+
+    if (s->mode_8bit)
+        msvideo1_decode_8bit(s);
+    else
+        msvideo1_decode_16bit(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 msvideo1_decode_end(AVCodecContext *avctx)
+{
+    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+
+    if (s->prev_frame.data[0])
+        avctx->release_buffer(avctx, &s->prev_frame);
+
+    return 0;
+}
+
+AVCodec msvideo1_decoder = {
+    "msvideo1",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_MSVIDEO1,
+    sizeof(Msvideo1Context),
+    msvideo1_decode_init,
+    NULL,
+    msvideo1_decode_end,
+    msvideo1_decode_frame,
+    CODEC_CAP_DR1,
+};