Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / smacker.c
... / ...
CommitLineData
1/*
2 * Smacker demuxer
3 * Copyright (c) 2006 Konstantin Shishkov
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 * Based on http://wiki.multimedia.cx/index.php?title=Smacker
24 */
25
26#include <inttypes.h>
27
28#include "libavutil/bswap.h"
29#include "libavutil/channel_layout.h"
30#include "libavutil/intreadwrite.h"
31#include "avformat.h"
32#include "internal.h"
33
34#define SMACKER_PAL 0x01
35#define SMACKER_FLAG_RING_FRAME 0x01
36
37enum SAudFlags {
38 SMK_AUD_PACKED = 0x80,
39 SMK_AUD_16BITS = 0x20,
40 SMK_AUD_STEREO = 0x10,
41 SMK_AUD_BINKAUD = 0x08,
42 SMK_AUD_USEDCT = 0x04
43};
44
45typedef struct SmackerContext {
46 /* Smacker file header */
47 uint32_t magic;
48 uint32_t width, height;
49 uint32_t frames;
50 int pts_inc;
51 uint32_t flags;
52 uint32_t audio[7];
53 uint32_t treesize;
54 uint32_t mmap_size, mclr_size, full_size, type_size;
55 uint8_t aflags[7];
56 uint32_t rates[7];
57 uint32_t pad;
58 /* frame info */
59 uint32_t *frm_size;
60 uint8_t *frm_flags;
61 /* internal variables */
62 int cur_frame;
63 int is_ver4;
64 int64_t cur_pts;
65 /* current frame for demuxing */
66 uint8_t pal[768];
67 int indexes[7];
68 int videoindex;
69 uint8_t *bufs[7];
70 int buf_sizes[7];
71 int stream_id[7];
72 int curstream;
73 int64_t nextpos;
74 int64_t aud_pts[7];
75} SmackerContext;
76
77typedef struct SmackerFrame {
78 int64_t pts;
79 int stream;
80} SmackerFrame;
81
82/* palette used in Smacker */
83static const uint8_t smk_pal[64] = {
84 0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
85 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
86 0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D,
87 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
88 0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E,
89 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
90 0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF,
91 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF
92};
93
94
95static int smacker_probe(AVProbeData *p)
96{
97 if ( AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '2')
98 && AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '4'))
99 return 0;
100
101 if (AV_RL32(p->buf+4) > 32768U || AV_RL32(p->buf+8) > 32768U)
102 return AVPROBE_SCORE_MAX/4;
103
104 return AVPROBE_SCORE_MAX;
105}
106
107static int smacker_read_header(AVFormatContext *s)
108{
109 AVIOContext *pb = s->pb;
110 SmackerContext *smk = s->priv_data;
111 AVStream *st, *ast[7];
112 int i, ret;
113 int tbase;
114
115 /* read and check header */
116 smk->magic = avio_rl32(pb);
117 if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4'))
118 return AVERROR_INVALIDDATA;
119 smk->width = avio_rl32(pb);
120 smk->height = avio_rl32(pb);
121 smk->frames = avio_rl32(pb);
122 smk->pts_inc = (int32_t)avio_rl32(pb);
123 smk->flags = avio_rl32(pb);
124 if(smk->flags & SMACKER_FLAG_RING_FRAME)
125 smk->frames++;
126 for(i = 0; i < 7; i++)
127 smk->audio[i] = avio_rl32(pb);
128 smk->treesize = avio_rl32(pb);
129
130 if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant)
131 av_log(s, AV_LOG_ERROR, "treesize too large\n");
132 return AVERROR_INVALIDDATA;
133 }
134
135//FIXME remove extradata "rebuilding"
136 smk->mmap_size = avio_rl32(pb);
137 smk->mclr_size = avio_rl32(pb);
138 smk->full_size = avio_rl32(pb);
139 smk->type_size = avio_rl32(pb);
140 for(i = 0; i < 7; i++) {
141 smk->rates[i] = avio_rl24(pb);
142 smk->aflags[i] = avio_r8(pb);
143 }
144 smk->pad = avio_rl32(pb);
145 /* setup data */
146 if(smk->frames > 0xFFFFFF) {
147 av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n", smk->frames);
148 return AVERROR_INVALIDDATA;
149 }
150 smk->frm_size = av_malloc_array(smk->frames, sizeof(*smk->frm_size));
151 smk->frm_flags = av_malloc(smk->frames);
152 if (!smk->frm_size || !smk->frm_flags) {
153 av_freep(&smk->frm_size);
154 av_freep(&smk->frm_flags);
155 return AVERROR(ENOMEM);
156 }
157
158 smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2'));
159
160 /* read frame info */
161 for(i = 0; i < smk->frames; i++) {
162 smk->frm_size[i] = avio_rl32(pb);
163 }
164 for(i = 0; i < smk->frames; i++) {
165 smk->frm_flags[i] = avio_r8(pb);
166 }
167
168 /* init video codec */
169 st = avformat_new_stream(s, NULL);
170 if (!st)
171 return AVERROR(ENOMEM);
172 smk->videoindex = st->index;
173 st->codec->width = smk->width;
174 st->codec->height = smk->height;
175 st->codec->pix_fmt = AV_PIX_FMT_PAL8;
176 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
177 st->codec->codec_id = AV_CODEC_ID_SMACKVIDEO;
178 st->codec->codec_tag = smk->magic;
179 /* Smacker uses 100000 as internal timebase */
180 if(smk->pts_inc < 0)
181 smk->pts_inc = -smk->pts_inc;
182 else
183 smk->pts_inc *= 100;
184 tbase = 100000;
185 av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1);
186 avpriv_set_pts_info(st, 33, smk->pts_inc, tbase);
187 st->duration = smk->frames;
188 /* handle possible audio streams */
189 for(i = 0; i < 7; i++) {
190 smk->indexes[i] = -1;
191 if (smk->rates[i]) {
192 ast[i] = avformat_new_stream(s, NULL);
193 if (!ast[i])
194 return AVERROR(ENOMEM);
195 smk->indexes[i] = ast[i]->index;
196 ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO;
197 if (smk->aflags[i] & SMK_AUD_BINKAUD) {
198 ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_RDFT;
199 } else if (smk->aflags[i] & SMK_AUD_USEDCT) {
200 ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_DCT;
201 } else if (smk->aflags[i] & SMK_AUD_PACKED){
202 ast[i]->codec->codec_id = AV_CODEC_ID_SMACKAUDIO;
203 ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A');
204 } else {
205 ast[i]->codec->codec_id = AV_CODEC_ID_PCM_U8;
206 }
207 if (smk->aflags[i] & SMK_AUD_STEREO) {
208 ast[i]->codec->channels = 2;
209 ast[i]->codec->channel_layout = AV_CH_LAYOUT_STEREO;
210 } else {
211 ast[i]->codec->channels = 1;
212 ast[i]->codec->channel_layout = AV_CH_LAYOUT_MONO;
213 }
214 ast[i]->codec->sample_rate = smk->rates[i];
215 ast[i]->codec->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8;
216 if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == AV_CODEC_ID_PCM_U8)
217 ast[i]->codec->codec_id = AV_CODEC_ID_PCM_S16LE;
218 avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate
219 * ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8);
220 }
221 }
222
223
224 /* load trees to extradata, they will be unpacked by decoder */
225 if(ff_alloc_extradata(st->codec, smk->treesize + 16)){
226 av_log(s, AV_LOG_ERROR,
227 "Cannot allocate %"PRIu32" bytes of extradata\n",
228 smk->treesize + 16);
229 av_freep(&smk->frm_size);
230 av_freep(&smk->frm_flags);
231 return AVERROR(ENOMEM);
232 }
233 ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16);
234 if(ret != st->codec->extradata_size - 16){
235 av_freep(&smk->frm_size);
236 av_freep(&smk->frm_flags);
237 return AVERROR(EIO);
238 }
239 ((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size);
240 ((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size);
241 ((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size);
242 ((int32_t*)st->codec->extradata)[3] = av_le2ne32(smk->type_size);
243
244 smk->curstream = -1;
245 smk->nextpos = avio_tell(pb);
246
247 return 0;
248}
249
250
251static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
252{
253 SmackerContext *smk = s->priv_data;
254 int flags;
255 int ret;
256 int i;
257 int frame_size = 0;
258 int palchange = 0;
259
260 if (avio_feof(s->pb) || smk->cur_frame >= smk->frames)
261 return AVERROR_EOF;
262
263 /* if we demuxed all streams, pass another frame */
264 if(smk->curstream < 0) {
265 avio_seek(s->pb, smk->nextpos, 0);
266 frame_size = smk->frm_size[smk->cur_frame] & (~3);
267 flags = smk->frm_flags[smk->cur_frame];
268 /* handle palette change event */
269 if(flags & SMACKER_PAL){
270 int size, sz, t, off, j, pos;
271 uint8_t *pal = smk->pal;
272 uint8_t oldpal[768];
273
274 memcpy(oldpal, pal, 768);
275 size = avio_r8(s->pb);
276 size = size * 4 - 1;
277 if(size + 1 > frame_size)
278 return AVERROR_INVALIDDATA;
279 frame_size -= size;
280 frame_size--;
281 sz = 0;
282 pos = avio_tell(s->pb) + size;
283 while(sz < 256){
284 t = avio_r8(s->pb);
285 if(t & 0x80){ /* skip palette entries */
286 sz += (t & 0x7F) + 1;
287 pal += ((t & 0x7F) + 1) * 3;
288 } else if(t & 0x40){ /* copy with offset */
289 off = avio_r8(s->pb);
290 j = (t & 0x3F) + 1;
291 if (off + j > 0x100) {
292 av_log(s, AV_LOG_ERROR,
293 "Invalid palette update, offset=%d length=%d extends beyond palette size\n",
294 off, j);
295 return AVERROR_INVALIDDATA;
296 }
297 off *= 3;
298 while(j-- && sz < 256) {
299 *pal++ = oldpal[off + 0];
300 *pal++ = oldpal[off + 1];
301 *pal++ = oldpal[off + 2];
302 sz++;
303 off += 3;
304 }
305 } else { /* new entries */
306 *pal++ = smk_pal[t];
307 *pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
308 *pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
309 sz++;
310 }
311 }
312 avio_seek(s->pb, pos, 0);
313 palchange |= 1;
314 }
315 flags >>= 1;
316 smk->curstream = -1;
317 /* if audio chunks are present, put them to stack and retrieve later */
318 for(i = 0; i < 7; i++) {
319 if(flags & 1) {
320 uint32_t size;
321 int err;
322
323 size = avio_rl32(s->pb) - 4;
324 if (!size || size + 4L > frame_size) {
325 av_log(s, AV_LOG_ERROR, "Invalid audio part size\n");
326 return AVERROR_INVALIDDATA;
327 }
328 frame_size -= size;
329 frame_size -= 4;
330 smk->curstream++;
331 if ((err = av_reallocp(&smk->bufs[smk->curstream], size)) < 0) {
332 smk->buf_sizes[smk->curstream] = 0;
333 return err;
334 }
335 smk->buf_sizes[smk->curstream] = size;
336 ret = avio_read(s->pb, smk->bufs[smk->curstream], size);
337 if(ret != size)
338 return AVERROR(EIO);
339 smk->stream_id[smk->curstream] = smk->indexes[i];
340 }
341 flags >>= 1;
342 }
343 if (frame_size < 0 || frame_size >= INT_MAX/2)
344 return AVERROR_INVALIDDATA;
345 if (av_new_packet(pkt, frame_size + 769))
346 return AVERROR(ENOMEM);
347 if(smk->frm_size[smk->cur_frame] & 1)
348 palchange |= 2;
349 pkt->data[0] = palchange;
350 memcpy(pkt->data + 1, smk->pal, 768);
351 ret = avio_read(s->pb, pkt->data + 769, frame_size);
352 if(ret != frame_size)
353 return AVERROR(EIO);
354 pkt->stream_index = smk->videoindex;
355 pkt->pts = smk->cur_frame;
356 pkt->size = ret + 769;
357 smk->cur_frame++;
358 smk->nextpos = avio_tell(s->pb);
359 } else {
360 if (smk->stream_id[smk->curstream] < 0 || !smk->bufs[smk->curstream])
361 return AVERROR_INVALIDDATA;
362 if (av_new_packet(pkt, smk->buf_sizes[smk->curstream]))
363 return AVERROR(ENOMEM);
364 memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]);
365 pkt->size = smk->buf_sizes[smk->curstream];
366 pkt->stream_index = smk->stream_id[smk->curstream];
367 pkt->pts = smk->aud_pts[smk->curstream];
368 smk->aud_pts[smk->curstream] += AV_RL32(pkt->data);
369 smk->curstream--;
370 }
371
372 return 0;
373}
374
375static int smacker_read_close(AVFormatContext *s)
376{
377 SmackerContext *smk = s->priv_data;
378 int i;
379
380 for(i = 0; i < 7; i++)
381 av_freep(&smk->bufs[i]);
382 av_freep(&smk->frm_size);
383 av_freep(&smk->frm_flags);
384
385 return 0;
386}
387
388AVInputFormat ff_smacker_demuxer = {
389 .name = "smk",
390 .long_name = NULL_IF_CONFIG_SMALL("Smacker"),
391 .priv_data_size = sizeof(SmackerContext),
392 .read_probe = smacker_probe,
393 .read_header = smacker_read_header,
394 .read_packet = smacker_read_packet,
395 .read_close = smacker_read_close,
396};