FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/ape.c
Date: 2026-08-28 05:02:41
Exec Total Coverage
Lines: 168 211 79.6%
Functions: 5 6 83.3%
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 "libavutil/mem.h"
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30 #include "apetag.h"
31
32 /* The earliest and latest file formats supported by this library */
33 #define APE_MIN_VERSION 3800
34 #define APE_MAX_VERSION 3990
35
36 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
37 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
38 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
39 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
40 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
41 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
42
43 #define APE_EXTRADATA_SIZE 6
44
45 typedef struct APEFrame {
46 int64_t pos;
47 int64_t size;
48 int nblocks;
49 int skip;
50 int64_t pts;
51 } APEFrame;
52
53 typedef struct APEContext {
54 /* Derived fields */
55 uint32_t junklength;
56 uint32_t firstframe;
57 uint32_t totalsamples;
58 int currentframe;
59 APEFrame *frames;
60
61 /* Info from Descriptor Block */
62 int16_t fileversion;
63 int16_t padding1;
64 uint32_t descriptorlength;
65 uint32_t headerlength;
66 uint32_t seektablelength;
67 uint32_t wavheaderlength;
68 uint32_t audiodatalength;
69 uint32_t audiodatalength_high;
70 uint32_t wavtaillength;
71 uint8_t md5[16];
72
73 /* Info from Header Block */
74 uint16_t compressiontype;
75 uint16_t formatflags;
76 uint32_t blocksperframe;
77 uint32_t finalframeblocks;
78 uint32_t totalframes;
79 uint16_t bps;
80 uint16_t channels;
81 uint32_t samplerate;
82 } APEContext;
83
84 7955 static int ape_probe(const AVProbeData * p)
85 {
86 7955 int version = AV_RL16(p->buf+4);
87
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 7955 if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
88 7940 return 0;
89
90
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 15 if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
91 ✗ return AVPROBE_SCORE_MAX/4;
92
93 15 return AVPROBE_SCORE_MAX;
94 }
95
96 15 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
97 {
98 #ifdef DEBUG
99 int i;
100
101 av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
102 av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
103 av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
104 av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
105 av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
106 av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
107 av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
108 av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
109 av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
110 char md5_hex[sizeof(ape_ctx->md5) * 2 + 1];
111 ff_data_to_hex(md5_hex, ape_ctx->md5, sizeof(ape_ctx->md5), 1);
112 av_log(s, AV_LOG_DEBUG, "md5 = %s\n", md5_hex);
113
114 av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
115
116 av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
117 av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
118 av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
119 av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
120 av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
121 av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
122 av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
123 av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
124
125 av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
126 if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
127 av_log(s, AV_LOG_DEBUG, "No seektable\n");
128 }
129
130 av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
131 for (i = 0; i < ape_ctx->totalframes; i++)
132 av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
133 ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
134 ape_ctx->frames[i].nblocks);
135
136 av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
137 av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
138 av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
139 av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
140 #endif
141 15 }
142
143 15 static int ape_read_header(AVFormatContext * s)
144 {
145 15 AVIOContext *pb = s->pb;
146 15 APEContext *ape = s->priv_data;
147 AVStream *st;
148 uint32_t tag;
149 int i, ret;
150 int64_t total_blocks;
151 15 int64_t final_size = 0;
152 int64_t pts, file_size;
153
154 /* Skip any leading junk such as id3v2 tags */
155 15 ape->junklength = avio_tell(pb);
156
157 15 tag = avio_rl32(pb);
158
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 15 if (tag != MKTAG('M', 'A', 'C', ' '))
159 ✗ return AVERROR_INVALIDDATA;
160
161 15 ape->fileversion = avio_rl16(pb);
162
163
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 15 if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
164 ✗ av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
165 ✗ ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
166 ✗ return AVERROR_PATCHWELCOME;
167 }
168
169
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 15 if (ape->fileversion >= 3980) {
170 3 ape->padding1 = avio_rl16(pb);
171 3 ape->descriptorlength = avio_rl32(pb);
172 3 ape->headerlength = avio_rl32(pb);
173 3 ape->seektablelength = avio_rl32(pb);
174 3 ape->wavheaderlength = avio_rl32(pb);
175 3 ape->audiodatalength = avio_rl32(pb);
176 3 ape->audiodatalength_high = avio_rl32(pb);
177 3 ape->wavtaillength = avio_rl32(pb);
178 3 avio_read(pb, ape->md5, 16);
179
180 /* Skip any unknown bytes at the end of the descriptor.
181 This is for future compatibility */
182
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 3 if (ape->descriptorlength > 52)
183 ✗ avio_skip(pb, ape->descriptorlength - 52);
184
185 /* Read header data */
186 3 ape->compressiontype = avio_rl16(pb);
187 3 ape->formatflags = avio_rl16(pb);
188 3 ape->blocksperframe = avio_rl32(pb);
189 3 ape->finalframeblocks = avio_rl32(pb);
190 3 ape->totalframes = avio_rl32(pb);
191 3 ape->bps = avio_rl16(pb);
192 3 ape->channels = avio_rl16(pb);
193 3 ape->samplerate = avio_rl32(pb);
194 } else {
195 12 ape->descriptorlength = 0;
196 12 ape->headerlength = 32;
197
198 12 ape->compressiontype = avio_rl16(pb);
199 12 ape->formatflags = avio_rl16(pb);
200 12 ape->channels = avio_rl16(pb);
201 12 ape->samplerate = avio_rl32(pb);
202 12 ape->wavheaderlength = avio_rl32(pb);
203 12 ape->wavtaillength = avio_rl32(pb);
204 12 ape->totalframes = avio_rl32(pb);
205 12 ape->finalframeblocks = avio_rl32(pb);
206
207
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 12 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
208 12 avio_skip(pb, 4); /* Skip the peak level */
209 12 ape->headerlength += 4;
210 }
211
212
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 12 if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
213 6 ape->seektablelength = avio_rl32(pb);
214 6 ape->headerlength += 4;
215 6 ape->seektablelength *= sizeof(int32_t);
216 } else
217 6 ape->seektablelength = ape->totalframes * sizeof(int32_t);
218
219
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 12 if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
220 ✗ ape->bps = 8;
221
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 12 else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
222 ✗ ape->bps = 24;
223 else
224 12 ape->bps = 16;
225
226
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 12 if (ape->fileversion >= 3950)
227 ✗ ape->blocksperframe = 73728 * 4;
228
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 12 else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
229 9 ape->blocksperframe = 73728;
230 else
231 3 ape->blocksperframe = 9216;
232
233 /* Skip any stored wav header */
234
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 12 if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
235 12 avio_skip(pb, ape->wavheaderlength);
236 }
237
238
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 15 if(!ape->totalframes || pb->eof_reached){
239 ✗ av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
240 ✗ return AVERROR(EINVAL);
241 }
242
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 15 if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
243 ✗ av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
244 ape->totalframes);
245 ✗ return AVERROR_INVALIDDATA;
246 }
247
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 15 if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
248 ✗ av_log(s, AV_LOG_ERROR,
249 "Number of seek entries is less than number of frames: %zu vs. %"PRIu32"\n",
250 ✗ ape->seektablelength / sizeof(uint32_t), ape->totalframes);
251 ✗ return AVERROR_INVALIDDATA;
252 }
253 15 ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
254
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 15 if(!ape->frames)
255 ✗ return AVERROR(ENOMEM);
256 15 ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
257
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 15 if (ape->fileversion < 3810)
258 2 ape->firstframe += ape->totalframes;
259 15 ape->currentframe = 0;
260
261
262 15 ape->totalsamples = ape->finalframeblocks;
263
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 15 if (ape->totalframes > 1)
264 15 ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
265
266 15 ape->frames[0].pos = ape->firstframe;
267 15 ape->frames[0].nblocks = ape->blocksperframe;
268 15 ape->frames[0].skip = 0;
269 15 avio_rl32(pb); // seektable[0]
270
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 1353 for (i = 1; i < ape->totalframes; i++) {
271 1338 uint32_t seektable_entry = avio_rl32(pb);
272 1338 ape->frames[i].pos = seektable_entry + ape->junklength;
273 1338 ape->frames[i].nblocks = ape->blocksperframe;
274 1338 ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
275 1338 ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
276
277
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 1338 if (pb->eof_reached) {
278 ✗ av_log(s, AV_LOG_ERROR, "seektable truncated\n");
279 ✗ return AVERROR_INVALIDDATA;
280 }
281 ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
282 }
283 15 avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
284
285 15 ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
286 /* calculate final packet size from total file size, if available */
287 15 file_size = avio_size(pb);
288
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 15 if (file_size > 0) {
289 15 final_size = file_size - ape->frames[ape->totalframes - 1].pos -
290 15 ape->wavtaillength;
291 15 final_size -= final_size & 3;
292 }
293
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 15 if (file_size <= 0 || final_size <= 0)
294 15 final_size = ape->finalframeblocks * 8LL;
295 15 ape->frames[ape->totalframes - 1].size = final_size;
296
297
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 1368 for (i = 0; i < ape->totalframes; i++) {
298
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 1353 if(ape->frames[i].skip){
299 748 ape->frames[i].pos -= ape->frames[i].skip;
300 748 ape->frames[i].size += ape->frames[i].skip;
301 }
302
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 1353 if (ape->frames[i].size > INT_MAX - 3)
303 ✗ return AVERROR_INVALIDDATA;
304 1353 ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
305 }
306
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 15 if (ape->fileversion < 3810) {
307
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 329 for (i = 0; i < ape->totalframes; i++) {
308 327 int bits = avio_r8(pb);
309
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 327 if (i && bits)
310 317 ape->frames[i - 1].size += 4;
311
312 327 ape->frames[i].skip <<= 3;
313 327 ape->frames[i].skip += bits;
314 ff_dlog(s, "bittable: %2d\n", bits);
315
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 327 if (pb->eof_reached) {
316 ✗ av_log(s, AV_LOG_ERROR, "bittable truncated\n");
317 ✗ return AVERROR_INVALIDDATA;
318 }
319 }
320 }
321
322 15 ape_dumpinfo(s, ape);
323
324 15 av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
325 15 ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
326 15 ape->compressiontype);
327
328 /* now we are ready: build format streams */
329 15 st = avformat_new_stream(s, NULL);
330
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 15 if (!st)
331 ✗ return AVERROR(ENOMEM);
332
333
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 15 total_blocks = (ape->totalframes == 0) ? 0 : ((int64_t)(ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
334
335 15 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
336 15 st->codecpar->codec_id = AV_CODEC_ID_APE;
337 15 st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
338 15 st->codecpar->ch_layout.nb_channels = ape->channels;
339 15 st->codecpar->sample_rate = ape->samplerate;
340 15 st->codecpar->bits_per_coded_sample = ape->bps;
341
342 15 st->nb_frames = ape->totalframes;
343 15 st->start_time = 0;
344 15 st->duration = total_blocks;
345 15 avpriv_set_pts_info(st, 64, 1, ape->samplerate);
346
347
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 15 if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
348 ✗ return ret;
349 15 AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
350 15 AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
351 15 AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
352
353 15 pts = 0;
354
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 1368 for (i = 0; i < ape->totalframes; i++) {
355 1353 ape->frames[i].pts = pts;
356 1353 av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
357 1353 pts += ape->blocksperframe;
358 }
359
360 /* try to read APE tags */
361
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 15 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
362 15 ff_ape_parse_tag(s);
363 15 avio_seek(pb, 0, SEEK_SET);
364 }
365
366 15 return 0;
367 }
368
369 98 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
370 {
371 int ret;
372 int nblocks;
373 98 APEContext *ape = s->priv_data;
374 98 uint32_t extra_size = 8;
375 int64_t ret64;
376
377
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 98 if (avio_feof(s->pb))
378 15 return AVERROR_EOF;
379
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 83 if (ape->currentframe >= ape->totalframes)
380 ✗ return AVERROR_EOF;
381
382 83 ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
383
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 83 if (ret64 < 0)
384 ✗ return ret64;
385
386 /* Calculate how many blocks there are in this frame */
387
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 83 if (ape->currentframe == (ape->totalframes - 1))
388 ✗ nblocks = ape->finalframeblocks;
389 else
390 83 nblocks = ape->blocksperframe;
391
392
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 83 if (ape->frames[ape->currentframe].size <= 0 ||
393
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 83 ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
394 ✗ av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
395 ✗ ape->frames[ape->currentframe].size);
396 ✗ ape->currentframe++;
397 ✗ return AVERROR_INVALIDDATA;
398 }
399
400 83 ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
401
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 83 if (ret < 0)
402 ✗ return ret;
403
404 83 AV_WL32(pkt->data , nblocks);
405 83 AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
406 83 ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
407
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 83 if (ret < 0) {
408 ✗ return ret;
409 }
410
411 83 pkt->pts = ape->frames[ape->currentframe].pts;
412 83 pkt->stream_index = 0;
413
414 /* note: we need to modify the packet size here to handle the last
415 packet */
416 83 pkt->size = ret + extra_size;
417 83 pkt->duration = nblocks;
418
419 83 ape->currentframe++;
420
421 83 return 0;
422 }
423
424 15 static int ape_read_close(AVFormatContext * s)
425 {
426 15 APEContext *ape = s->priv_data;
427
428 15 av_freep(&ape->frames);
429 15 return 0;
430 }
431
432 ✗ static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
433 {
434 ✗ AVStream *st = s->streams[stream_index];
435 ✗ APEContext *ape = s->priv_data;
436 ✗ int index = av_index_search_timestamp(st, timestamp, flags);
437 int64_t ret;
438
439 ✗ if (index < 0)
440 ✗ return -1;
441
442 ✗ if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
443 ✗ return ret;
444 ✗ ape->currentframe = index;
445 ✗ return 0;
446 }
447
448 const FFInputFormat ff_ape_demuxer = {
449 .p.name = "ape",
450 .p.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
451 .p.extensions = "ape,apl,mac",
452 .priv_data_size = sizeof(APEContext),
453 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
454 .read_probe = ape_probe,
455 .read_header = ape_read_header,
456 .read_packet = ape_read_packet,
457 .read_close = ape_read_close,
458 .read_seek = ape_read_seek,
459 };
460