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FFmpeg/libavcodec/dsicinav.c
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-30 23:30:55 +00:00

370 lines
12 KiB
C

/*
* 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 libavcodec/dsicinav.c
* Delphine Software International CIN audio/video decoders
*/
#include "avcodec.h"
#include "bytestream.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 av_cold int cinvideo_decode_init(AVCodecContext *avctx)
{
CinVideoContext *cin = avctx->priv_data;
unsigned int i;
cin->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
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 = AV_RL16(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,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
CinVideoContext *cin = 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 = AV_RL16(buf+1);
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] = bytestream_get_le24(&buf);
bitmap_frame_size -= 3;
}
} else {
for (i = 0; i < palette_colors_count; ++i) {
cin->palette[buf[0]] = AV_RL24(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);
FFSWAP(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 av_cold int cinvideo_decode_end(AVCodecContext *avctx)
{
CinVideoContext *cin = 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 av_cold int cinaudio_decode_init(AVCodecContext *avctx)
{
CinAudioContext *cin = avctx->priv_data;
cin->avctx = avctx;
cin->initial_decode_frame = 1;
cin->delta = 0;
avctx->sample_fmt = SAMPLE_FMT_S16;
return 0;
}
static int cinaudio_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
CinAudioContext *cin = avctx->priv_data;
const uint8_t *src = buf;
int16_t *samples = (int16_t *)data;
buf_size = FFMIN(buf_size, *data_size/2);
if (cin->initial_decode_frame) {
cin->initial_decode_frame = 0;
cin->delta = (int16_t)AV_RL16(src); src += 2;
*samples++ = cin->delta;
buf_size -= 2;
}
while (buf_size > 0) {
cin->delta += cinaudio_delta16_table[*src++];
cin->delta = av_clip_int16(cin->delta);
*samples++ = cin->delta;
--buf_size;
}
*data_size = (uint8_t *)samples - (uint8_t *)data;
return src - buf;
}
AVCodec dsicinvideo_decoder = {
"dsicinvideo",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_DSICINVIDEO,
sizeof(CinVideoContext),
cinvideo_decode_init,
NULL,
cinvideo_decode_end,
cinvideo_decode_frame,
CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
};
AVCodec dsicinaudio_decoder = {
"dsicinaudio",
AVMEDIA_TYPE_AUDIO,
CODEC_ID_DSICINAUDIO,
sizeof(CinAudioContext),
cinaudio_decode_init,
NULL,
NULL,
cinaudio_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
};