FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/ape.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 168 211 79.6%
Branches: 65 104 62.5%

Line Branch Exec Source
1 /*
2 * Monkey's Audio APE demuxer
3 * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
4 * based upon libdemac from Dave Chapman.
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <stdio.h>
24
25 #include "libavutil/intreadwrite.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "apetag.h"
29
30 /* The earliest and latest file formats supported by this library */
31 #define APE_MIN_VERSION 3800
32 #define APE_MAX_VERSION 3990
33
34 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
35 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
36 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
37 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
38 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
39 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
40
41 #define APE_EXTRADATA_SIZE 6
42
43 typedef struct APEFrame {
44 int64_t pos;
45 int64_t size;
46 int nblocks;
47 int skip;
48 int64_t pts;
49 } APEFrame;
50
51 typedef struct APEContext {
52 /* Derived fields */
53 uint32_t junklength;
54 uint32_t firstframe;
55 uint32_t totalsamples;
56 int currentframe;
57 APEFrame *frames;
58
59 /* Info from Descriptor Block */
60 int16_t fileversion;
61 int16_t padding1;
62 uint32_t descriptorlength;
63 uint32_t headerlength;
64 uint32_t seektablelength;
65 uint32_t wavheaderlength;
66 uint32_t audiodatalength;
67 uint32_t audiodatalength_high;
68 uint32_t wavtaillength;
69 uint8_t md5[16];
70
71 /* Info from Header Block */
72 uint16_t compressiontype;
73 uint16_t formatflags;
74 uint32_t blocksperframe;
75 uint32_t finalframeblocks;
76 uint32_t totalframes;
77 uint16_t bps;
78 uint16_t channels;
79 uint32_t samplerate;
80 } APEContext;
81
82 6780 static int ape_probe(const AVProbeData * p)
83 {
84 6780 int version = AV_RL16(p->buf+4);
85
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6780 if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
86 6766 return 0;
87
88
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14 if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
89 return AVPROBE_SCORE_MAX/4;
90
91 14 return AVPROBE_SCORE_MAX;
92 }
93
94 14 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
95 {
96 #ifdef DEBUG
97 int i;
98
99 av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
100 av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
101 av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
102 av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
103 av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
104 av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
105 av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
106 av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
107 av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
108 av_log(s, AV_LOG_DEBUG, "md5 = ");
109 for (i = 0; i < 16; i++)
110 av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
111 av_log(s, AV_LOG_DEBUG, "\n");
112
113 av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
114
115 av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
116 av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
117 av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
118 av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
119 av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
120 av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
121 av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
122 av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
123
124 av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
125 if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
126 av_log(s, AV_LOG_DEBUG, "No seektable\n");
127 }
128
129 av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
130 for (i = 0; i < ape_ctx->totalframes; i++)
131 av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
132 ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
133 ape_ctx->frames[i].nblocks);
134
135 av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
136 av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
137 av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
138 av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
139 #endif
140 14 }
141
142 14 static int ape_read_header(AVFormatContext * s)
143 {
144 14 AVIOContext *pb = s->pb;
145 14 APEContext *ape = s->priv_data;
146 AVStream *st;
147 uint32_t tag;
148 int i, ret;
149 int64_t total_blocks;
150 14 int64_t final_size = 0;
151 int64_t pts, file_size;
152
153 /* Skip any leading junk such as id3v2 tags */
154 14 ape->junklength = avio_tell(pb);
155
156 14 tag = avio_rl32(pb);
157
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14 if (tag != MKTAG('M', 'A', 'C', ' '))
158 return AVERROR_INVALIDDATA;
159
160 14 ape->fileversion = avio_rl16(pb);
161
162
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14 if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
163 av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
164 ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
165 return AVERROR_PATCHWELCOME;
166 }
167
168
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14 if (ape->fileversion >= 3980) {
169 2 ape->padding1 = avio_rl16(pb);
170 2 ape->descriptorlength = avio_rl32(pb);
171 2 ape->headerlength = avio_rl32(pb);
172 2 ape->seektablelength = avio_rl32(pb);
173 2 ape->wavheaderlength = avio_rl32(pb);
174 2 ape->audiodatalength = avio_rl32(pb);
175 2 ape->audiodatalength_high = avio_rl32(pb);
176 2 ape->wavtaillength = avio_rl32(pb);
177 2 avio_read(pb, ape->md5, 16);
178
179 /* Skip any unknown bytes at the end of the descriptor.
180 This is for future compatibility */
181
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2 if (ape->descriptorlength > 52)
182 avio_skip(pb, ape->descriptorlength - 52);
183
184 /* Read header data */
185 2 ape->compressiontype = avio_rl16(pb);
186 2 ape->formatflags = avio_rl16(pb);
187 2 ape->blocksperframe = avio_rl32(pb);
188 2 ape->finalframeblocks = avio_rl32(pb);
189 2 ape->totalframes = avio_rl32(pb);
190 2 ape->bps = avio_rl16(pb);
191 2 ape->channels = avio_rl16(pb);
192 2 ape->samplerate = avio_rl32(pb);
193 } else {
194 12 ape->descriptorlength = 0;
195 12 ape->headerlength = 32;
196
197 12 ape->compressiontype = avio_rl16(pb);
198 12 ape->formatflags = avio_rl16(pb);
199 12 ape->channels = avio_rl16(pb);
200 12 ape->samplerate = avio_rl32(pb);
201 12 ape->wavheaderlength = avio_rl32(pb);
202 12 ape->wavtaillength = avio_rl32(pb);
203 12 ape->totalframes = avio_rl32(pb);
204 12 ape->finalframeblocks = avio_rl32(pb);
205
206
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12 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
207 12 avio_skip(pb, 4); /* Skip the peak level */
208 12 ape->headerlength += 4;
209 }
210
211
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12 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
212 6 ape->seektablelength = avio_rl32(pb);
213 6 ape->headerlength += 4;
214 6 ape->seektablelength *= sizeof(int32_t);
215 } else
216 6 ape->seektablelength = ape->totalframes * sizeof(int32_t);
217
218
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12 if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
219 ape->bps = 8;
220
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12 else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
221 ape->bps = 24;
222 else
223 12 ape->bps = 16;
224
225
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12 if (ape->fileversion >= 3950)
226 ape->blocksperframe = 73728 * 4;
227
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12 else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
228 9 ape->blocksperframe = 73728;
229 else
230 3 ape->blocksperframe = 9216;
231
232 /* Skip any stored wav header */
233
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12 if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
234 12 avio_skip(pb, ape->wavheaderlength);
235 }
236
237
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14 if(!ape->totalframes || pb->eof_reached){
238 av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
239 return AVERROR(EINVAL);
240 }
241
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14 if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
242 av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
243 ape->totalframes);
244 return AVERROR_INVALIDDATA;
245 }
246
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14 if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
247 av_log(s, AV_LOG_ERROR,
248 "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
249 ape->seektablelength / sizeof(uint32_t), ape->totalframes);
250 return AVERROR_INVALIDDATA;
251 }
252 14 ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
253
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14 if(!ape->frames)
254 return AVERROR(ENOMEM);
255 14 ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
256
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14 if (ape->fileversion < 3810)
257 2 ape->firstframe += ape->totalframes;
258 14 ape->currentframe = 0;
259
260
261 14 ape->totalsamples = ape->finalframeblocks;
262
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14 if (ape->totalframes > 1)
263 14 ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
264
265 14 ape->frames[0].pos = ape->firstframe;
266 14 ape->frames[0].nblocks = ape->blocksperframe;
267 14 ape->frames[0].skip = 0;
268 14 avio_rl32(pb); // seektable[0]
269
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1277 for (i = 1; i < ape->totalframes; i++) {
270 1263 uint32_t seektable_entry = avio_rl32(pb);
271 1263 ape->frames[i].pos = seektable_entry + ape->junklength;
272 1263 ape->frames[i].nblocks = ape->blocksperframe;
273 1263 ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
274 1263 ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
275
276
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1263 if (pb->eof_reached) {
277 av_log(s, AV_LOG_ERROR, "seektable truncated\n");
278 return AVERROR_INVALIDDATA;
279 }
280 ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
281 }
282 14 avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
283
284 14 ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
285 /* calculate final packet size from total file size, if available */
286 14 file_size = avio_size(pb);
287
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14 if (file_size > 0) {
288 14 final_size = file_size - ape->frames[ape->totalframes - 1].pos -
289 14 ape->wavtaillength;
290 14 final_size -= final_size & 3;
291 }
292
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14 if (file_size <= 0 || final_size <= 0)
293 14 final_size = ape->finalframeblocks * 8;
294 14 ape->frames[ape->totalframes - 1].size = final_size;
295
296
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1291 for (i = 0; i < ape->totalframes; i++) {
297
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1277 if(ape->frames[i].skip){
298 689 ape->frames[i].pos -= ape->frames[i].skip;
299 689 ape->frames[i].size += ape->frames[i].skip;
300 }
301
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1277 if (ape->frames[i].size > INT_MAX - 3)
302 return AVERROR_INVALIDDATA;
303 1277 ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
304 }
305
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14 if (ape->fileversion < 3810) {
306
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329 for (i = 0; i < ape->totalframes; i++) {
307 327 int bits = avio_r8(pb);
308
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327 if (i && bits)
309 317 ape->frames[i - 1].size += 4;
310
311 327 ape->frames[i].skip <<= 3;
312 327 ape->frames[i].skip += bits;
313 ff_dlog(s, "bittable: %2d\n", bits);
314
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327 if (pb->eof_reached) {
315 av_log(s, AV_LOG_ERROR, "bittable truncated\n");
316 return AVERROR_INVALIDDATA;
317 }
318 }
319 }
320
321 14 ape_dumpinfo(s, ape);
322
323 14 av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
324 14 ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
325 14 ape->compressiontype);
326
327 /* now we are ready: build format streams */
328 14 st = avformat_new_stream(s, NULL);
329
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14 if (!st)
330 return AVERROR(ENOMEM);
331
332
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14 total_blocks = (ape->totalframes == 0) ? 0 : ((int64_t)(ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
333
334 14 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
335 14 st->codecpar->codec_id = AV_CODEC_ID_APE;
336 14 st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
337 14 st->codecpar->ch_layout.nb_channels = ape->channels;
338 14 st->codecpar->sample_rate = ape->samplerate;
339 14 st->codecpar->bits_per_coded_sample = ape->bps;
340
341 14 st->nb_frames = ape->totalframes;
342 14 st->start_time = 0;
343 14 st->duration = total_blocks;
344 14 avpriv_set_pts_info(st, 64, 1, ape->samplerate);
345
346
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14 if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
347 return ret;
348 14 AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
349 14 AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
350 14 AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
351
352 14 pts = 0;
353
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1291 for (i = 0; i < ape->totalframes; i++) {
354 1277 ape->frames[i].pts = pts;
355 1277 av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
356 1277 pts += ape->blocksperframe;
357 }
358
359 /* try to read APE tags */
360
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14 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
361 14 ff_ape_parse_tag(s);
362 14 avio_seek(pb, 0, SEEK_SET);
363 }
364
365 14 return 0;
366 }
367
368 78 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
369 {
370 int ret;
371 int nblocks;
372 78 APEContext *ape = s->priv_data;
373 78 uint32_t extra_size = 8;
374 int64_t ret64;
375
376
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78 if (avio_feof(s->pb))
377 11 return AVERROR_EOF;
378
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67 if (ape->currentframe >= ape->totalframes)
379 return AVERROR_EOF;
380
381 67 ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
382
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67 if (ret64 < 0)
383 return ret64;
384
385 /* Calculate how many blocks there are in this frame */
386
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67 if (ape->currentframe == (ape->totalframes - 1))
387 nblocks = ape->finalframeblocks;
388 else
389 67 nblocks = ape->blocksperframe;
390
391
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67 if (ape->frames[ape->currentframe].size <= 0 ||
392
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67 ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
393 av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
394 ape->frames[ape->currentframe].size);
395 ape->currentframe++;
396 return AVERROR(EIO);
397 }
398
399 67 ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
400
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67 if (ret < 0)
401 return ret;
402
403 67 AV_WL32(pkt->data , nblocks);
404 67 AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
405 67 ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
406
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67 if (ret < 0) {
407 return ret;
408 }
409
410 67 pkt->pts = ape->frames[ape->currentframe].pts;
411 67 pkt->stream_index = 0;
412
413 /* note: we need to modify the packet size here to handle the last
414 packet */
415 67 pkt->size = ret + extra_size;
416 67 pkt->duration = nblocks;
417
418 67 ape->currentframe++;
419
420 67 return 0;
421 }
422
423 14 static int ape_read_close(AVFormatContext * s)
424 {
425 14 APEContext *ape = s->priv_data;
426
427 14 av_freep(&ape->frames);
428 14 return 0;
429 }
430
431 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
432 {
433 AVStream *st = s->streams[stream_index];
434 APEContext *ape = s->priv_data;
435 int index = av_index_search_timestamp(st, timestamp, flags);
436 int64_t ret;
437
438 if (index < 0)
439 return -1;
440
441 if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
442 return ret;
443 ape->currentframe = index;
444 return 0;
445 }
446
447 const AVInputFormat ff_ape_demuxer = {
448 .name = "ape",
449 .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
450 .priv_data_size = sizeof(APEContext),
451 .flags_internal = FF_FMT_INIT_CLEANUP,
452 .read_probe = ape_probe,
453 .read_header = ape_read_header,
454 .read_packet = ape_read_packet,
455 .read_close = ape_read_close,
456 .read_seek = ape_read_seek,
457 .extensions = "ape,apl,mac",
458 };
459