WebSVN – Kolibri OS – Blame – /contrib/sdk/sources/ffmpeg/libavcodec/dsicinav.c

Rev	Author	Line No.	Line
4349	Serge	1	/*
		2	* Delphine Software International CIN Audio/Video Decoders
		3	* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
		4	*
		5	* This file is part of FFmpeg.
		6	*
		7	* FFmpeg is free software; you can redistribute it and/or
		8	* modify it under the terms of the GNU Lesser General Public
		9	* License as published by the Free Software Foundation; either
		10	* version 2.1 of the License, or (at your option) any later version.
		11	*
		12	* FFmpeg is distributed in the hope that it will be useful,
		13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		15	* Lesser General Public License for more details.
		16	*
		17	* You should have received a copy of the GNU Lesser General Public
		18	* License along with FFmpeg; if not, write to the Free Software
		19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
		20	*/
		21
		22	/**
		23	* @file
		24	* Delphine Software International CIN audio/video decoders
		25	*/
		26
		27	#include "libavutil/channel_layout.h"
		28	#include "avcodec.h"
		29	#include "bytestream.h"
		30	#include "internal.h"
		31	#include "mathops.h"
		32
		33
		34	typedef enum CinVideoBitmapIndex {
		35	CIN_CUR_BMP = 0, /* current */
		36	CIN_PRE_BMP = 1, /* previous */
		37	CIN_INT_BMP = 2 /* intermediate */
		38	} CinVideoBitmapIndex;
		39
		40	typedef struct CinVideoContext {
		41	AVCodecContext *avctx;
		42	AVFrame frame;
		43	unsigned int bitmap_size;
		44	uint32_t palette[256];
		45	uint8_t *bitmap_table[3];
		46	} CinVideoContext;
		47
		48	typedef struct CinAudioContext {
		49	int initial_decode_frame;
		50	int delta;
		51	} CinAudioContext;
		52
		53
		54	/* table defining a geometric sequence with multiplier = 32767 ^ (1 / 128) */
		55	static const int16_t cinaudio_delta16_table[256] = {
		56	0, 0, 0, 0, 0, 0, 0, 0,
		57	0, 0, 0, 0, 0, 0, 0, 0,
		58	0, 0, 0, -30210, -27853, -25680, -23677, -21829,
		59	-20126, -18556, -17108, -15774, -14543, -13408, -12362, -11398,
		60	-10508, -9689, -8933, -8236, -7593, -7001, -6455, -5951,
		61	-5487, -5059, -4664, -4300, -3964, -3655, -3370, -3107,
		62	-2865, -2641, -2435, -2245, -2070, -1908, -1759, -1622,
		63	-1495, -1379, -1271, -1172, -1080, -996, -918, -847,
		64	-781, -720, -663, -612, -564, -520, -479, -442,
		65	-407, -376, -346, -319, -294, -271, -250, -230,
		66	-212, -196, -181, -166, -153, -141, -130, -120,
		67	-111, -102, -94, -87, -80, -74, -68, -62,
		68	-58, -53, -49, -45, -41, -38, -35, -32,
		69	-30, -27, -25, -23, -21, -20, -18, -17,
		70	-15, -14, -13, -12, -11, -10, -9, -8,
		71	-7, -6, -5, -4, -3, -2, -1, 0,
		72	0, 1, 2, 3, 4, 5, 6, 7,
		73	8, 9, 10, 11, 12, 13, 14, 15,
		74	17, 18, 20, 21, 23, 25, 27, 30,
		75	32, 35, 38, 41, 45, 49, 53, 58,
		76	62, 68, 74, 80, 87, 94, 102, 111,
		77	120, 130, 141, 153, 166, 181, 196, 212,
		78	230, 250, 271, 294, 319, 346, 376, 407,
		79	442, 479, 520, 564, 612, 663, 720, 781,
		80	847, 918, 996, 1080, 1172, 1271, 1379, 1495,
		81	1622, 1759, 1908, 2070, 2245, 2435, 2641, 2865,
		82	3107, 3370, 3655, 3964, 4300, 4664, 5059, 5487,
		83	5951, 6455, 7001, 7593, 8236, 8933, 9689, 10508,
		84	11398, 12362, 13408, 14543, 15774, 17108, 18556, 20126,
		85	21829, 23677, 25680, 27853, 30210, 0, 0, 0,
		86	0, 0, 0, 0, 0, 0, 0, 0,
		87	0, 0, 0, 0, 0, 0, 0, 0
		88	};
		89
		90	static av_cold void destroy_buffers(CinVideoContext *cin)
		91	{
		92	int i;
		93
		94	for (i = 0; i < 3; ++i)
		95	av_freep(&cin->bitmap_table[i]);
		96	}
		97
		98	static av_cold int allocate_buffers(CinVideoContext *cin)
		99	{
		100	int i;
		101
		102	for (i = 0; i < 3; ++i) {
		103	cin->bitmap_table[i] = av_mallocz(cin->bitmap_size);
		104	if (!cin->bitmap_table[i]) {
		105	av_log(cin->avctx, AV_LOG_ERROR, "Can't allocate bitmap buffers.\n");
		106	destroy_buffers(cin);
		107	return AVERROR(ENOMEM);
		108	}
		109	}
		110
		111	return 0;
		112	}
		113
		114	static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
		115	{
		116	CinVideoContext *cin = avctx->priv_data;
		117
		118	cin->avctx = avctx;
		119	avctx->pix_fmt = AV_PIX_FMT_PAL8;
		120
		121	avcodec_get_frame_defaults(&cin->frame);
		122
		123	cin->bitmap_size = avctx->width * avctx->height;
		124	if (allocate_buffers(cin))
		125	return AVERROR(ENOMEM);
		126
		127	return 0;
		128	}
		129
		130	static void cin_apply_delta_data(const unsigned char src, unsigned char dst,
		131	int size)
		132	{
		133	while (size--)
		134	dst++ += src++;
		135	}
		136
		137	static int cin_decode_huffman(const unsigned char *src, int src_size,
		138	unsigned char *dst, int dst_size)
		139	{
		140	int b, huff_code = 0;
		141	unsigned char huff_code_table[15];
		142	unsigned char *dst_cur = dst;
		143	unsigned char *dst_end = dst + dst_size;
		144	const unsigned char *src_end = src + src_size;
		145
		146	memcpy(huff_code_table, src, 15);
		147	src += 15;
		148
		149	while (src < src_end) {
		150	huff_code = *src++;
		151	if ((huff_code >> 4) == 15) {
		152	b = huff_code << 4;
		153	huff_code = *src++;
		154	*dst_cur++ = b \| (huff_code >> 4);
		155	} else
		156	*dst_cur++ = huff_code_table[huff_code >> 4];
		157	if (dst_cur >= dst_end)
		158	break;
		159
		160	huff_code &= 15;
		161	if (huff_code == 15) {
		162	dst_cur++ = src++;
		163	} else
		164	*dst_cur++ = huff_code_table[huff_code];
		165	if (dst_cur >= dst_end)
		166	break;
		167	}
		168
		169	return dst_cur - dst;
		170	}
		171
		172	static int cin_decode_lzss(const unsigned char *src, int src_size,
		173	unsigned char *dst, int dst_size)
		174	{
		175	uint16_t cmd;
		176	int i, sz, offset, code;
		177	unsigned char dst_end = dst + dst_size, dst_start = dst;
		178	const unsigned char *src_end = src + src_size;
		179
		180	while (src < src_end && dst < dst_end) {
		181	code = *src++;
		182	for (i = 0; i < 8 && src < src_end && dst < dst_end; ++i) {
		183	if (code & (1 << i)) {
		184	dst++ = src++;
		185	} else {
		186	cmd = AV_RL16(src);
		187	src += 2;
		188	offset = cmd >> 4;
		189	if ((int)(dst - dst_start) < offset + 1)
		190	return AVERROR_INVALIDDATA;
		191	sz = (cmd & 0xF) + 2;
		192	/* don't use memcpy/memmove here as the decoding routine
		193	* (ab)uses buffer overlappings to repeat bytes in the
		194	* destination */
		195	sz = FFMIN(sz, dst_end - dst);
		196	while (sz--) {
		197	dst = (dst - offset - 1);
		198	++dst;
		199	}
		200	}
		201	}
		202	}
		203
		204	return 0;
		205	}
		206
		207	static int cin_decode_rle(const unsigned char *src, int src_size,
		208	unsigned char *dst, int dst_size)
		209	{
		210	int len, code;
		211	unsigned char *dst_end = dst + dst_size;
		212	const unsigned char *src_end = src + src_size;
		213
		214	while (src + 1 < src_end && dst < dst_end) {
		215	code = *src++;
		216	if (code & 0x80) {
		217	len = code - 0x7F;
		218	memset(dst, *src++, FFMIN(len, dst_end - dst));
		219	} else {
		220	len = code + 1;
		221	if (len > src_end-src) {
		222	av_log(NULL, AV_LOG_ERROR, "RLE overread\n");
		223	return AVERROR_INVALIDDATA;
		224	}
		225	memcpy(dst, src, FFMIN3(len, dst_end - dst, src_end - src));
		226	src += len;
		227	}
		228	dst += len;
		229	}
		230	return 0;
		231	}
		232
		233	static int cinvideo_decode_frame(AVCodecContext *avctx,
		234	void data, int got_frame,
		235	AVPacket *avpkt)
		236	{
		237	const uint8_t *buf = avpkt->data;
		238	int buf_size = avpkt->size;
		239	CinVideoContext *cin = avctx->priv_data;
		240	int i, y, palette_type, palette_colors_count,
		241	bitmap_frame_type, bitmap_frame_size, res = 0;
		242
		243	palette_type = buf[0];
		244	palette_colors_count = AV_RL16(buf + 1);
		245	bitmap_frame_type = buf[3];
		246	buf += 4;
		247
		248	bitmap_frame_size = buf_size - 4;
		249
		250	/* handle palette */
		251	if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
		252	return AVERROR_INVALIDDATA;
		253	if (palette_type == 0) {
		254	if (palette_colors_count > 256)
		255	return AVERROR_INVALIDDATA;
		256	for (i = 0; i < palette_colors_count; ++i) {
		257	cin->palette[i] = 0xFFU << 24 \| bytestream_get_le24(&buf);
		258	bitmap_frame_size -= 3;
		259	}
		260	} else {
		261	for (i = 0; i < palette_colors_count; ++i) {
		262	cin->palette[buf[0]] = 0xFFU << 24 \| AV_RL24(buf + 1);
		263	buf += 4;
		264	bitmap_frame_size -= 4;
		265	}
		266	}
		267
		268	/* note: the decoding routines below assumes that
		269	* surface.width = surface.pitch */
		270	switch (bitmap_frame_type) {
		271	case 9:
		272	cin_decode_rle(buf, bitmap_frame_size,
		273	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		274	break;
		275	case 34:
		276	cin_decode_rle(buf, bitmap_frame_size,
		277	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		278	cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
		279	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		280	break;
		281	case 35:
		282	bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
		283	cin->bitmap_table[CIN_INT_BMP], cin->bitmap_size);
		284	cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
		285	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		286	break;
		287	case 36:
		288	bitmap_frame_size = cin_decode_huffman(buf, bitmap_frame_size,
		289	cin->bitmap_table[CIN_INT_BMP],
		290	cin->bitmap_size);
		291	cin_decode_rle(cin->bitmap_table[CIN_INT_BMP], bitmap_frame_size,
		292	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		293	cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
		294	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		295	break;
		296	case 37:
		297	cin_decode_huffman(buf, bitmap_frame_size,
		298	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		299	break;
		300	case 38:
		301	res = cin_decode_lzss(buf, bitmap_frame_size,
		302	cin->bitmap_table[CIN_CUR_BMP],
		303	cin->bitmap_size);
		304	if (res < 0)
		305	return res;
		306	break;
		307	case 39:
		308	res = cin_decode_lzss(buf, bitmap_frame_size,
		309	cin->bitmap_table[CIN_CUR_BMP],
		310	cin->bitmap_size);
		311	if (res < 0)
		312	return res;
		313	cin_apply_delta_data(cin->bitmap_table[CIN_PRE_BMP],
		314	cin->bitmap_table[CIN_CUR_BMP], cin->bitmap_size);
		315	break;
		316	}
		317
		318	if ((res = ff_reget_buffer(avctx, &cin->frame)) < 0)
		319	return res;
		320
		321	memcpy(cin->frame.data[1], cin->palette, sizeof(cin->palette));
		322	cin->frame.palette_has_changed = 1;
		323	for (y = 0; y < cin->avctx->height; ++y)
		324	memcpy(cin->frame.data[0] + (cin->avctx->height - 1 - y) * cin->frame.linesize[0],
		325	cin->bitmap_table[CIN_CUR_BMP] + y * cin->avctx->width,
		326	cin->avctx->width);
		327
		328	FFSWAP(uint8_t *, cin->bitmap_table[CIN_CUR_BMP],
		329	cin->bitmap_table[CIN_PRE_BMP]);
		330
		331	if ((res = av_frame_ref(data, &cin->frame)) < 0)
		332	return res;
		333
		334	*got_frame = 1;
		335
		336	return buf_size;
		337	}
		338
		339	static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
		340	{
		341	CinVideoContext *cin = avctx->priv_data;
		342
		343	av_frame_unref(&cin->frame);
		344
		345	destroy_buffers(cin);
		346
		347	return 0;
		348	}
		349
		350	static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
		351	{
		352	CinAudioContext *cin = avctx->priv_data;
		353
		354	cin->initial_decode_frame = 1;
		355	cin->delta = 0;
		356	avctx->sample_fmt = AV_SAMPLE_FMT_S16;
		357	avctx->channels = 1;
		358	avctx->channel_layout = AV_CH_LAYOUT_MONO;
		359
		360	return 0;
		361	}
		362
		363	static int cinaudio_decode_frame(AVCodecContext avctx, void data,
		364	int got_frame_ptr, AVPacket avpkt)
		365	{
		366	AVFrame *frame = data;
		367	const uint8_t *buf = avpkt->data;
		368	CinAudioContext *cin = avctx->priv_data;
		369	const uint8_t *buf_end = buf + avpkt->size;
		370	int16_t *samples;
		371	int delta, ret;
		372
		373	/* get output buffer */
		374	frame->nb_samples = avpkt->size - cin->initial_decode_frame;
		375	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
		376	return ret;
		377	samples = (int16_t *)frame->data[0];
		378
		379	delta = cin->delta;
		380	if (cin->initial_decode_frame) {
		381	cin->initial_decode_frame = 0;
		382	delta = sign_extend(AV_RL16(buf), 16);
		383	buf += 2;
		384	*samples++ = delta;
		385	}
		386	while (buf < buf_end) {
		387	delta += cinaudio_delta16_table[*buf++];
		388	delta = av_clip_int16(delta);
		389	*samples++ = delta;
		390	}
		391	cin->delta = delta;
		392
		393	*got_frame_ptr = 1;
		394
		395	return avpkt->size;
		396	}
		397
		398	AVCodec ff_dsicinvideo_decoder = {
		399	.name = "dsicinvideo",
		400	.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
		401	.type = AVMEDIA_TYPE_VIDEO,
		402	.id = AV_CODEC_ID_DSICINVIDEO,
		403	.priv_data_size = sizeof(CinVideoContext),
		404	.init = cinvideo_decode_init,
		405	.close = cinvideo_decode_end,
		406	.decode = cinvideo_decode_frame,
		407	.capabilities = CODEC_CAP_DR1,
		408	};
		409
		410	AVCodec ff_dsicinaudio_decoder = {
		411	.name = "dsicinaudio",
		412	.long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
		413	.type = AVMEDIA_TYPE_AUDIO,
		414	.id = AV_CODEC_ID_DSICINAUDIO,
		415	.priv_data_size = sizeof(CinAudioContext),
		416	.init = cinaudio_decode_init,
		417	.decode = cinaudio_decode_frame,
		418	.capabilities = CODEC_CAP_DR1,
		419	};

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