History

Electronic Arts Madcow decoder

Originally committed as revision 19178 to svn://svn.ffmpeg.org/ffmpeg/trunk

Peter Ross committed 17 years ago

Commit c63ea921 parent 86b61d46 files · +324 −1Browse files

Unified · Split

6 files
  1. Changelog +1 −0
  2. doc/general.texi +1 −0
  3. libavcodec/Makefile +1 −0
  4. libavcodec/allcodecs.c +1 −0
  5. libavcodec/avcodec.h +2 −1
  6. libavcodec/eamad.c +318 −0
Changelog+1−0
@@ -24,6 +24,7 @@ version <next>: · 23 unmodified lines
24- SoX native format muxer and demuxer24- SoX native format muxer and demuxer
25- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries25- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries
26- DPX image decoder26- DPX image decoder
27- Electronic Arts Madcow decoder
27 28
28 29
29 30
doc/general.texi+1−0
@@ -356,6 +356,7 @@ following image formats are supported: · 355 unmodified lines
356 @tab Codec originally used in Feeble Files game.356 @tab Codec originally used in Feeble Files game.
357@item Electronic Arts CMV video @tab @tab X357@item Electronic Arts CMV video @tab @tab X
358 @tab Used in NHL 95 game.358 @tab Used in NHL 95 game.
359@item Electronic Arts Madcow video @tab @tab X
359@item Electronic Arts TGV video @tab @tab X360@item Electronic Arts TGV video @tab @tab X
360@item Electronic Arts TGQ video @tab @tab X361@item Electronic Arts TGQ video @tab @tab X
361@item Electronic Arts TQI video @tab @tab X362@item Electronic Arts TQI video @tab @tab X
libavcodec/Makefile+1−0
@@ -76,6 +76,7 @@ OBJS-$(CONFIG_DVVIDEO_ENCODER) += dv.o · 75 unmodified lines
76OBJS-$(CONFIG_DXA_DECODER) += dxa.o76OBJS-$(CONFIG_DXA_DECODER) += dxa.o
77OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o ac3dec.o ac3tab.o ac3dec_data.o ac3.o77OBJS-$(CONFIG_EAC3_DECODER) += eac3dec.o ac3dec.o ac3tab.o ac3dec_data.o ac3.o
78OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o78OBJS-$(CONFIG_EACMV_DECODER) += eacmv.o
79OBJS-$(CONFIG_EAMAD_DECODER) += eamad.o eaidct.o
79OBJS-$(CONFIG_EATGQ_DECODER) += eatgq.o eaidct.o80OBJS-$(CONFIG_EATGQ_DECODER) += eatgq.o eaidct.o
80OBJS-$(CONFIG_EATGV_DECODER) += eatgv.o81OBJS-$(CONFIG_EATGV_DECODER) += eatgv.o
81OBJS-$(CONFIG_EATQI_DECODER) += eatqi.o eaidct.o mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o82OBJS-$(CONFIG_EATQI_DECODER) += eatqi.o eaidct.o mpeg12.o mpeg12data.o mpegvideo.o error_resilience.o
libavcodec/allcodecs.c+1−0
@@ -81,6 +81,7 @@ void avcodec_register_all(void) · 80 unmodified lines
81 REGISTER_ENCDEC (DVVIDEO, dvvideo);81 REGISTER_ENCDEC (DVVIDEO, dvvideo);
82 REGISTER_DECODER (DXA, dxa);82 REGISTER_DECODER (DXA, dxa);
83 REGISTER_DECODER (EACMV, eacmv);83 REGISTER_DECODER (EACMV, eacmv);
84 REGISTER_DECODER (EAMAD, eamad);
84 REGISTER_DECODER (EATGQ, eatgq);85 REGISTER_DECODER (EATGQ, eatgq);
85 REGISTER_DECODER (EATGV, eatgv);86 REGISTER_DECODER (EATGV, eatgv);
86 REGISTER_DECODER (EATQI, eatqi);87 REGISTER_DECODER (EATQI, eatqi);
libavcodec/avcodec.h+2−1
@@ -30,7 +30,7 @@ · 29 unmodified lines
30#include "libavutil/avutil.h"30#include "libavutil/avutil.h"
31 31
32#define LIBAVCODEC_VERSION_MAJOR 5232#define LIBAVCODEC_VERSION_MAJOR 52
33#define LIBAVCODEC_VERSION_MINOR 3033#define LIBAVCODEC_VERSION_MINOR 31
34#define LIBAVCODEC_VERSION_MICRO 234#define LIBAVCODEC_VERSION_MICRO 2
35 35
36#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \36#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
@@ -197,6 +197,7 @@ enum CodecID { · 160 unmodified lines
197 CODEC_ID_TMV,197 CODEC_ID_TMV,
198 CODEC_ID_V210,198 CODEC_ID_V210,
199 CODEC_ID_DPX,199 CODEC_ID_DPX,
200 CODEC_ID_MAD,
200 201
201 /* various PCM "codecs" */202 /* various PCM "codecs" */
202 CODEC_ID_PCM_S16LE= 0x10000,203 CODEC_ID_PCM_S16LE= 0x10000,
libavcodec/eamad.c+318−0
@@ -0,0 +1,318 @@
1/*
2 * Electronic Arts Madcow Video Decoder
3 * Copyright (c) 2007-2009 Peter Ross
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 St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file libavcodec/eamad.c
24 * Electronic Arts Madcow Video Decoder
25 * by Peter Ross <pross@xvid.org>
26 *
27 * Technical details here:
28 * http://wiki.multimedia.cx/index.php?title=Electronic_Arts_MAD
29 */
30
31#include "avcodec.h"
32#include "get_bits.h"
33#include "dsputil.h"
34#include "aandcttab.h"
35#include "mpeg12.h"
36#include "mpeg12data.h"
37
38#define EA_PREAMBLE_SIZE 8
39#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
40#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD p-frame */
41#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
42
43typedef struct MadContext {
44 MpegEncContext s;
45 AVFrame frame;
46 AVFrame last_frame;
47 void *bitstream_buf;
48 unsigned int bitstream_buf_size;
49 DECLARE_ALIGNED_16(DCTELEM, block[64]);
50} MadContext;
51
52static void bswap16_buf(uint16_t *dst, const uint16_t *src, int count)
53{
54 int i;
55 for (i=0; i<count; i++)
56 dst[i] = bswap_16(src[i]);
57}
58
59static av_cold int decode_init(AVCodecContext *avctx)
60{
61 MadContext *t = avctx->priv_data;
62 MpegEncContext *s = &t->s;
63 s->avctx = avctx;
64 avctx->pix_fmt = PIX_FMT_YUV420P;
65 if (avctx->idct_algo == FF_IDCT_AUTO)
66 avctx->idct_algo = FF_IDCT_EA;
67 dsputil_init(&s->dsp, avctx);
68 ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
69 ff_mpeg12_init_vlcs();
70 return 0;
71}
72
73static inline void comp(unsigned char *dst, int dst_stride,
74 unsigned char *src, int src_stride, int add)
75{
76 int j, i;
77 for (j=0; j<8; j++)
78 for (i=0; i<8; i++)
79 dst[j*dst_stride + i] = av_clip_uint8(src[j*src_stride + i] + add);
80}
81
82static inline void comp_block(MadContext *t, int mb_x, int mb_y,
83 int j, int mv_x, int mv_y, int add)
84{
85 MpegEncContext *s = &t->s;
86 if (j < 4) {
87 comp(t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
88 t->frame.linesize[0],
89 t->last_frame.data[0] + (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x,
90 t->last_frame.linesize[0], add);
91 } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
92 int index = j - 3;
93 comp(t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x * 8,
94 t->frame.linesize[index],
95 t->last_frame.data[index] + (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2),
96 t->last_frame.linesize[index], add);
97 }
98}
99
100static inline void idct_put(MadContext *t, DCTELEM *block, int mb_x, int mb_y, int j)
101{
102 MpegEncContext *s = &t->s;
103 if (j < 4) {
104 s->dsp.idct_put(
105 t->frame.data[0] + (mb_y*16 + ((j&2)<<2))*t->frame.linesize[0] + mb_x*16 + ((j&1)<<3),
106 t->frame.linesize[0], block);
107 } else if (!(s->avctx->flags & CODEC_FLAG_GRAY)) {
108 int index = j - 3;
109 s->dsp.idct_put(
110 t->frame.data[index] + (mb_y*8)*t->frame.linesize[index] + mb_x*8,
111 t->frame.linesize[index], block);
112 }
113}
114
115static inline void decode_block_intra(MadContext * t, DCTELEM * block)
116{
117 MpegEncContext *s = &t->s;
118 int level, i, j, run;
119 RLTable *rl = &ff_rl_mpeg1;
120 const uint8_t *scantable = s->intra_scantable.permutated;
121 int16_t *quant_matrix = s->intra_matrix;
122
123 block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
124
125 /* The RL decoder is derived from mpeg1_decode_block_intra;
126 Escaped level and run values a decoded differently */
127 {
128 OPEN_READER(re, &s->gb);
129 /* now quantify & encode AC coefficients */
130 for (;;) {
131 UPDATE_CACHE(re, &s->gb);
132 GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
133
134 if (level == 127) {
135 break;
136 } else if (level != 0) {
137 i += run;
138 j = scantable[i];
139 level = (level*quant_matrix[j]) >> 4;
140 level = (level-1)|1;
141 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
142 LAST_SKIP_BITS(re, &s->gb, 1);
143 } else {
144 /* escape */
145 UPDATE_CACHE(re, &s->gb);
146 level = SHOW_SBITS(re, &s->gb, 10); SKIP_BITS(re, &s->gb, 10);
147
148 UPDATE_CACHE(re, &s->gb);
149 run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
150
151 i += run;
152 j = scantable[i];
153 if (level < 0) {
154 level = -level;
155 level = (level*quant_matrix[j]) >> 4;
156 level = (level-1)|1;
157 level = -level;
158 } else {
159 level = (level*quant_matrix[j]) >> 4;
160 level = (level-1)|1;
161 }
162 }
163 if (i > 63) {
164 av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
165 return;
166 }
167
168 block[j] = level;
169 }
170 CLOSE_READER(re, &s->gb);
171 }
172}
173
174static int decode_motion(GetBitContext *gb)
175{
176 int value = 0;
177 if (get_bits1(gb)) {
178 if (get_bits1(gb))
179 value = -17;
180 value += get_bits(gb, 4) + 1;
181 }
182 return value;
183}
184
185static void decode_mb(MadContext *t, int inter)
186{
187 MpegEncContext *s = &t->s;
188 int mv_map = 0;
189 int mv_x, mv_y;
190 int j;
191
192 if (inter) {
193 int v = decode210(&s->gb);
194 if (v < 2) {
195 mv_map = v ? get_bits(&s->gb, 6) : 63;
196 mv_x = decode_motion(&s->gb);
197 mv_y = decode_motion(&s->gb);
198 } else {
199 mv_map = 0;
200 }
201 }
202
203 for (j=0; j<6; j++) {
204 if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
205 int add = 2*decode_motion(&s->gb);
206 comp_block(t, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
207 } else {
208 s->dsp.clear_block(t->block);
209 decode_block_intra(t, t->block);
210 idct_put(t, t->block, s->mb_x, s->mb_y, j);
211 }
212 }
213}
214
215static void calc_intra_matrix(MadContext *t, int qscale)
216{
217 MpegEncContext *s = &t->s;
218 int i;
219
220 if (s->avctx->idct_algo == FF_IDCT_EA) {
221 s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
222 for (i=1; i<64; i++)
223 s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
224 } else {
225 s->intra_matrix[0] = ff_mpeg1_default_intra_matrix[0];
226 for (i=1; i<64; i++)
227 s->intra_matrix[i] = (ff_mpeg1_default_intra_matrix[i]*qscale) << 1;
228 }
229}
230
231static int decode_frame(AVCodecContext *avctx,
232 void *data, int *data_size,
233 AVPacket *avpkt)
234{
235 const uint8_t *buf = avpkt->data;
236 int buf_size = avpkt->size;
237 const uint8_t *buf_end = buf+buf_size;
238 MadContext *t = avctx->priv_data;
239 MpegEncContext *s = &t->s;
240 int chunk_type;
241 int inter;
242
243 if (buf_size < 17) {
244 av_log(avctx, AV_LOG_ERROR, "Input buffer too small\n");
245 *data_size = 0;
246 return -1;
247 }
248
249 chunk_type = AV_RL32(&buf[0]);
250 inter = (chunk_type == MADm_TAG || chunk_type == MADe_TAG);
251 buf += 8;
252
253 av_reduce(&avctx->time_base.num, &avctx->time_base.den,
254 AV_RL16(&buf[6]), 1000, 1<<30);
255
256 s->width = AV_RL16(&buf[8]);
257 s->height = AV_RL16(&buf[10]);
258 calc_intra_matrix(t, buf[13]);
259 buf += 16;
260
261 if (avctx->width != s->width || avctx->height != s->height) {
262 if (avcodec_check_dimensions(avctx, s->width, s->height) < 0)
263 return -1;
264 avcodec_set_dimensions(avctx, s->width, s->height);
265 if (t->frame.data[0])
266 avctx->release_buffer(avctx, &t->frame);
267 }
268
269 t->frame.reference = 1;
270 if (!t->frame.data[0]) {
271 if (avctx->get_buffer(avctx, &t->frame) < 0) {
272 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
273 return -1;
274 }
275 }
276
277 av_fast_malloc(&t->bitstream_buf, &t->bitstream_buf_size, (buf_end-buf) + FF_INPUT_BUFFER_PADDING_SIZE);
278 if (!t->bitstream_buf)
279 return AVERROR(ENOMEM);
280 bswap16_buf(t->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
281 init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
282
283 for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
284 for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)
285 decode_mb(t, inter);
286
287 *data_size = sizeof(AVFrame);
288 *(AVFrame*)data = t->frame;
289
290 if (chunk_type != MADe_TAG)
291 FFSWAP(AVFrame, t->frame, t->last_frame);
292
293 return buf_size;
294}
295
296static av_cold int decode_end(AVCodecContext *avctx)
297{
298 MadContext *t = avctx->priv_data;
299 if (t->frame.data[0])
300 avctx->release_buffer(avctx, &t->frame);
301 if (t->last_frame.data[0])
302 avctx->release_buffer(avctx, &t->last_frame);
303 av_free(t->bitstream_buf);
304 return 0;
305}
306
307AVCodec eamad_decoder = {
308 "eamad",
309 CODEC_TYPE_VIDEO,
310 CODEC_ID_MAD,
311 sizeof(MadContext),
312 decode_init,
313 NULL,
314 decode_end,
315 decode_frame,
316 CODEC_CAP_DR1,
317 .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video")
318};

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