From 72450e50a58fdcc088708cf01c38de5dd5d2eb20 Mon Sep 17 00:00:00 2001 From: Baptiste Coudurier Date: Wed, 11 Oct 2006 16:57:00 +0000 Subject: 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 --- libavcodec/dsicinav.c | 362 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 362 insertions(+) create mode 100644 libavcodec/dsicinav.c (limited to 'libavcodec/dsicinav.c') 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, +}; -- cgit v1.2.3