support for Delphine Software .cin files demuxing / audio and video decoding, by Gregory Montoir %cyx A users P sourceforge P net%

Originally committed as revision 6659 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 362 insertions, 0 deletions

diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
new file mode 100644
index 0000000000..59a4345abd
--- /dev/null
+++ b/libavcodec/dsicinav.c
@@ -0,0 +1,362 @@
+/*
+ * Delphine Software International CIN Audio/Video Decoders
+ * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
+ *
+ * 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 dsicinav.c
+ * Delphine Software International CIN audio/video decoders
+ */
+
+#include "avcodec.h"
+#include "common.h"
+
+
+typedef enum CinVideoBitmapIndex {
+    CIN_CUR_BMP = 0, /* current */
+    CIN_PRE_BMP = 1, /* previous */
+    CIN_INT_BMP = 2  /* intermediate */
+} CinVideoBitmapIndex;
+
+typedef struct CinVideoContext {
+    AVCodecContext *avctx;
+    AVFrame frame;
+    unsigned int bitmap_size;
+    uint32_t palette[256];
+    uint8_t *bitmap_table[3];
+} CinVideoContext;
+
+typedef struct CinAudioContext {
+    AVCodecContext *avctx;
+    int initial_decode_frame;
+    int delta;
+} CinAudioContext;
+
+
+/* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
+static const int16_t cinaudio_delta16_table[256] = {
+         0,      0,      0,      0,      0,      0,      0,      0,
+         0,      0,      0,      0,      0,      0,      0,      0,
+         0,      0,      0, -30210, -27853, -25680, -23677, -21829,
+    -20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
+    -10508,  -9689,  -8933,  -8236,  -7593,  -7001,  -6455,  -5951,
+     -5487,  -5059,  -4664,  -4300,  -3964,  -3655,  -3370,  -3107,
+     -2865,  -2641,  -2435,  -2245,  -2070,  -1908,  -1759,  -1622,
+     -1495,  -1379,  -1271,  -1172,  -1080,   -996,   -918,   -847,
+      -781,   -720,   -663,   -612,   -564,   -520,   -479,   -442,
+      -407,   -376,   -346,   -319,   -294,   -271,   -250,   -230,
+      -212,   -196,   -181,   -166,   -153,   -141,   -130,   -120,
+      -111,   -102,    -94,    -87,    -80,    -74,    -68,    -62,
+       -58,    -53,    -49,    -45,    -41,    -38,    -35,    -32,
+       -30,    -27,    -25,    -23,    -21,    -20,    -18,    -17,
+       -15,    -14,    -13,    -12,    -11,    -10,     -9,     -8,
+        -7,     -6,     -5,     -4,     -3,     -2,     -1,      0,
+         0,      1,      2,      3,      4,      5,      6,      7,
+         8,      9,     10,     11,     12,     13,     14,     15,
+        17,     18,     20,     21,     23,     25,     27,     30,
+        32,     35,     38,     41,     45,     49,     53,     58,
+        62,     68,     74,     80,     87,     94,    102,    111,
+       120,    130,    141,    153,    166,    181,    196,    212,
+       230,    250,    271,    294,    319,    346,    376,    407,
+       442,    479,    520,    564,    612,    663,    720,    781,
+       847,    918,    996,   1080,   1172,   1271,   1379,   1495,
+      1622,   1759,   1908,   2070,   2245,   2435,   2641,   2865,
+      3107,   3370,   3655,   3964,   4300,   4664,   5059,   5487,
+      5951,   6455,   7001,   7593,   8236,   8933,   9689,  10508,
+     11398,  12362,  13408,  14543,  15774,  17108,  18556,  20126,
+     21829,  23677,  25680,  27853,  30210,      0,      0,      0,
+         0,      0,      0,      0,      0,      0,      0,      0,
+         0,      0,      0,      0,      0,      0,      0,      0
+};
+
+
+static int cinvideo_decode_init(AVCodecContext *avctx)
+{
+    CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+    unsigned int i;
+
+    cin->avctx = avctx;
+    avctx->pix_fmt = PIX_FMT_PAL8;
+    avctx->has_b_frames = 0;
+
+    cin->frame.data[0] = NULL;
+
+    cin->bitmap_size = avctx->width * avctx->height;
+    for (i = 0; i < 3; ++i) {
+        cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
+        if (!cin->bitmap_table[i])
+            av_log(avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
+    }
+
+    return 0;
+}
+
+static void cin_apply_delta_data(const unsigned char *src, unsigned char *dst, int size)
+{
+    while (size--)
+        *dst++ += *src++;
+}
+
+static int cin_decode_huffman(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
+{
+    int b, huff_code = 0;
+    unsigned char huff_code_table[15];
+    unsigned char *dst_cur = dst;
+    unsigned char *dst_end = dst + dst_size;
+    const unsigned char *src_end = src + src_size;
+
+    memcpy(huff_code_table, src, 15); src += 15; src_size -= 15;
+
+    while (src < src_end) {
+        huff_code = *src++;
+        if ((huff_code >> 4) == 15) {
+            b = huff_code << 4;
+            huff_code = *src++;
+            *dst_cur++ = b | (huff_code >> 4);
+        } else
+            *dst_cur++ = huff_code_table[huff_code >> 4];
+        if (dst_cur >= dst_end)
+            break;
+
+        huff_code &= 15;
+        if (huff_code == 15) {
+            *dst_cur++ = *src++;
+        } else
+            *dst_cur++ = huff_code_table[huff_code];
+        if (dst_cur >= dst_end)
+            break;
+    }
+
+    return dst_cur - dst;
+}
+
+static void cin_decode_lzss(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
+{
+    uint16_t cmd;
+    int i, sz, offset, code;
+    unsigned char *dst_end = dst + dst_size;
+    const unsigned char *src_end = src + src_size;
+
+    while (src < src_end && dst < dst_end) {
+        code = *src++;
+        for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
+            if (code & (1 << i)) {
+                *dst++ = *src++;
+            } else {
+                cmd = LE_16(src); src += 2;
+                offset = cmd >> 4;
+                sz = (cmd & 0xF) + 2;
+                /* don't use memcpy/memmove here as the decoding routine (ab)uses */
+                /* buffer overlappings to repeat bytes in the destination */
+                sz = FFMIN(sz, dst_end - dst);
+                while (sz--) {
+                    *dst = *(dst - offset - 1);
+                    ++dst;
+                }
+            }
+        }
+    }
+}
+
+static void cin_decode_rle(const unsigned char *src, int src_size, unsigned char *dst, int dst_size)
+{
+    int len, code;
+    unsigned char *dst_end = dst + dst_size;
+    const unsigned char *src_end = src + src_size;
+
+    while (src < src_end && dst < dst_end) {
+        code = *src++;
+        if (code & 0x80) {
+            len = code - 0x7F;
+            memset(dst, *src++, FFMIN(len, dst_end - dst));
+        } else {
+            len = code + 1;
+            memcpy(dst, src, FFMIN(len, dst_end - dst));
+            src += len;
+        }
+        dst += len;
+    }
+}
+
+static int cinvideo_decode_frame(AVCodecContext *avctx,
+                                 void *data, int *data_size,
+                                 uint8_t *buf, int buf_size)
+{
+    CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+    int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size;
+
+    cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
+    if (avctx->reget_buffer(avctx, &cin->frame)) {
+        av_log(cin->avctx, AV_LOG_ERROR, "delphinecinvideo: reget_buffer() failed to allocate a frame\n");
+        return -1;
+    }
+
+    palette_type = buf[0];
+    palette_colors_count = buf[1] | (buf[2] << 8);
+    bitmap_frame_type = buf[3];
+    buf += 4;
+
+    bitmap_frame_size = buf_size - 4;
+
+    /* handle palette */
+    if (palette_type == 0) {
+        for (i = 0; i < palette_colors_count; ++i) {
+            cin->palette[i] = (buf[2] << 16) | (buf[1] << 8) | buf[0];
+            buf += 3;
+            bitmap_frame_size -= 3;
+        }
+    } else {
+        for (i = 0; i < palette_colors_count; ++i) {
+            cin->palette[buf[0]] = (buf[3] << 16) | (buf[2] << 8) | buf[1];
+            buf += 4;
+            bitmap_frame_size -= 4;
+        }
+    }
+    memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
+    cin->frame.palette_has_changed = 1;
+
+    /* note: the decoding routines below assumes that surface.width = surface.pitch */
+    switch (bitmap_frame_type) {
+    case 9:
+        cin_decode_rle(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 34:
+        cin_decode_rle(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 35:
+        cin_decode_huffman(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
+        cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 36:
+        bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
+        cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 37:
+        cin_decode_huffman(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 38:
+        cin_decode_lzss(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    case 39:
+        cin_decode_lzss(buf, bitmap_frame_size,
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
+          cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
+        break;
+    }
+
+    for (y = 0; y < cin->avctx->height; ++y)
+        memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
+          cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
+          cin->avctx->width);
+
+    SWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_table[CIN_PRE_BMP]);
+
+    *data_size = sizeof(AVFrame);
+    *(AVFrame *)data = cin->frame;
+
+    return buf_size;
+}
+
+static int cinvideo_decode_end(AVCodecContext *avctx)
+{
+    CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+    int i;
+
+    if (cin->frame.data[0])
+        avctx->release_buffer(avctx, &cin->frame);
+
+    for (i = 0; i < 3; ++i)
+        av_free(cin->bitmap_table[i]);
+
+    return 0;
+}
+
+static int cinaudio_decode_init(AVCodecContext *avctx)
+{
+    CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
+
+    cin->avctx = avctx;
+    cin->initial_decode_frame = 1;
+    cin->delta = 0;
+
+    return 0;
+}
+
+static int cinaudio_decode_frame(AVCodecContext *avctx,
+                                 void *data, int *data_size,
+                                 uint8_t *buf, int buf_size)
+{
+    CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
+    uint8_t *src = buf;
+    int16_t *samples = (int16_t *)data;
+
+    if (cin->initial_decode_frame) {
+        cin->initial_decode_frame = 0;
+        cin->delta = (int16_t)LE_16(src); src += 2;
+        *samples++ = cin->delta;
+        buf_size -= 2;
+    }
+    while (buf_size > 0) {
+        cin->delta += cinaudio_delta16_table[*src++];
+        cin->delta = clip(cin->delta, -32768, 32767);
+        *samples++ = cin->delta;
+        --buf_size;
+    }
+
+    *data_size = (uint8_t *)samples - (uint8_t *)data;
+
+    return src - buf;
+}
+
+
+AVCodec dsicinvideo_decoder = {
+    "dsicinvideo",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_DSICINVIDEO,
+    sizeof(CinVideoContext),
+    cinvideo_decode_init,
+    NULL,
+    cinvideo_decode_end,
+    cinvideo_decode_frame,
+    CODEC_CAP_DR1,
+};
+
+AVCodec dsicinaudio_decoder = {
+    "dsicinaudio",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_DSICINAUDIO,
+    sizeof(CinAudioContext),
+    cinaudio_decode_init,
+    NULL,
+    NULL,
+    cinaudio_decode_frame,
+};