FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/rpl.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 167 213 78.4%
Functions: 7 7 100.0%
Branches: 75 133 56.4%
Line Branch Exec Source
1 /*
2 * ARMovie/RPL demuxer
3 * Copyright (c) 2007 Christian Ohm, 2008 Eli Friedman
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 #include <inttypes.h>
23 #include <stdlib.h>
24
25 #include "libavutil/avstring.h"
26 #include "libavutil/dict.h"
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30
31 #define RPL_SIGNATURE "ARMovie\x0A"
32 #define RPL_SIGNATURE_SIZE 8
33
34 /** 256 is arbitrary, but should be big enough for any reasonable file. */
35 #define RPL_LINE_LENGTH 256
36
37 7186 static int rpl_probe(const AVProbeData *p)
38 {
39
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 7186 if (memcmp(p->buf, RPL_SIGNATURE, RPL_SIGNATURE_SIZE))
40 7184 return 0;
41
42 2 return AVPROBE_SCORE_MAX;
43 }
44
45 typedef struct RPLContext {
46 // RPL header data
47 int32_t frames_per_chunk;
48
49 // Stream position data
50 uint32_t chunk_number;
51 uint32_t chunk_part;
52 uint32_t frame_in_part;
53 } RPLContext;
54
55 405 static int read_line(AVIOContext * pb, char* line, int bufsize)
56 {
57 int i;
58
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59 7645 int b = avio_r8(pb);
60
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 7645 if (b == 0)
61 ✗ break;
62
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 7645 if (b == '\n') {
63 405 line[i] = '\0';
64
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 405 return avio_feof(pb) ? -1 : 0;
65 }
66 7240 line[i] = b;
67 }
68 ✗ line[i] = '\0';
69 ✗ return -1;
70 }
71
72 24 static int32_t read_int(const char* line, const char** endptr, int* error)
73 {
74 24 unsigned long result = 0;
75
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 90 for (; *line>='0' && *line<='9'; line++) {
76
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 66 if (result > (0x7FFFFFFF - 9) / 10)
77 ✗ *error = -1;
78 66 result = 10 * result + *line - '0';
79 }
80 24 *endptr = line;
81 24 return result;
82 }
83
84 18 static int32_t read_line_and_int(AVIOContext * pb, int* error)
85 {
86 char line[RPL_LINE_LENGTH];
87 const char *endptr;
88 18 *error |= read_line(pb, line, sizeof(line));
89 18 return read_int(line, &endptr, error);
90 }
91
92 /** Parsing for fps, which can be a fraction. Unfortunately,
93 * the spec for the header leaves out a lot of details,
94 * so this is mostly guessing.
95 */
96 2 static AVRational read_fps(const char* line, int* error)
97 {
98 2 int64_t num, den = 1;
99 AVRational result;
100 2 num = read_int(line, &line, error);
101
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 2 if (*line == '.')
102 2 line++;
103
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 14 for (; *line>='0' && *line<='9'; line++) {
104 // Truncate any numerator too large to fit into an int64_t
105
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 12 if (num > (INT64_MAX - 9) / 10 || den > INT64_MAX / 10)
106 break;
107 12 num = 10 * num + (*line - '0');
108 12 den *= 10;
109 }
110
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 2 if (!num)
111 ✗ *error = -1;
112 2 av_reduce(&result.num, &result.den, num, den, 0x7FFFFFFF);
113 2 return result;
114 }
115
116 2 static int rpl_read_header(AVFormatContext *s)
117 {
118 2 AVIOContext *pb = s->pb;
119 2 RPLContext *rpl = s->priv_data;
120 2 AVStream *vst = NULL, *ast = NULL;
121 int64_t total_audio_size;
122 2 int error = 0;
123 const char *endptr;
124 char audio_type[RPL_LINE_LENGTH];
125 char audio_codec[RPL_LINE_LENGTH];
126
127 uint32_t i;
128
129 int32_t video_format, audio_format, chunk_catalog_offset, number_of_chunks;
130 AVRational fps;
131
132 char line[RPL_LINE_LENGTH];
133
134 // The header for RPL/ARMovie files is 21 lines of text
135 // containing the various header fields. The fields are always
136 // in the same order, and other text besides the first
137 // number usually isn't important.
138 // (The spec says that there exists some significance
139 // for the text in a few cases; samples needed.)
140 2 error |= read_line(pb, line, sizeof(line)); // ARMovie
141 2 error |= read_line(pb, line, sizeof(line)); // movie name
142 2 av_dict_set(&s->metadata, "title" , line, 0);
143 2 error |= read_line(pb, line, sizeof(line)); // date/copyright
144 2 av_dict_set(&s->metadata, "copyright", line, 0);
145 2 error |= read_line(pb, line, sizeof(line)); // author and other
146 2 av_dict_set(&s->metadata, "author" , line, 0);
147
148 // video headers
149 2 video_format = read_line_and_int(pb, &error);
150
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 2 if (video_format) {
151 2 vst = avformat_new_stream(s, NULL);
152
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 2 if (!vst)
153 ✗ return AVERROR(ENOMEM);
154 2 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
155 2 vst->codecpar->codec_tag = video_format;
156 2 vst->codecpar->width = read_line_and_int(pb, &error); // video width
157 2 vst->codecpar->height = read_line_and_int(pb, &error); // video height
158 2 vst->codecpar->bits_per_coded_sample = read_line_and_int(pb, &error); // video bits per sample
159
160 // Figure out the video codec
161
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 2 switch (vst->codecpar->codec_tag) {
162 #if 0
163 case 122:
164 vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE122;
165 break;
166 #endif
167 1 case 124:
168 1 vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE124;
169 // The header is wrong here, at least sometimes
170 1 vst->codecpar->bits_per_coded_sample = 16;
171 2 break;
172 1 case 130:
173 1 vst->codecpar->codec_id = AV_CODEC_ID_ESCAPE130;
174 1 break;
175 ✗ default:
176 ✗ avpriv_report_missing_feature(s, "Video format %s",
177 ✗ av_fourcc2str(vst->codecpar->codec_tag));
178 ✗ vst->codecpar->codec_id = AV_CODEC_ID_NONE;
179 }
180 } else {
181 ✗ for (i = 0; i < 3; i++)
182 ✗ error |= read_line(pb, line, sizeof(line));
183 }
184
185 2 error |= read_line(pb, line, sizeof(line)); // video frames per second
186 2 fps = read_fps(line, &error);
187
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 2 if (vst)
188 2 avpriv_set_pts_info(vst, 32, fps.den, fps.num);
189
190 // Audio headers
191
192 // ARMovie supports multiple audio tracks; I don't have any
193 // samples, though. This code will ignore additional tracks.
194 2 error |= read_line(pb, line, sizeof(line));
195 2 audio_format = read_int(line, &endptr, &error); // audio format ID
196 2 av_strlcpy(audio_codec, endptr, RPL_LINE_LENGTH);
197
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 2 if (audio_format) {
198 int channels;
199 2 ast = avformat_new_stream(s, NULL);
200
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 2 if (!ast)
201 ✗ return AVERROR(ENOMEM);
202 2 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
203 2 ast->codecpar->codec_tag = audio_format;
204 2 ast->codecpar->sample_rate = read_line_and_int(pb, &error); // audio bitrate
205
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 2 if (ast->codecpar->sample_rate < 0)
206 ✗ return AVERROR_INVALIDDATA;
207 2 channels = read_line_and_int(pb, &error); // number of audio channels
208
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 2 if (channels <= 0)
209 ✗ return AVERROR_INVALIDDATA;
210 2 error |= read_line(pb, line, sizeof(line));
211 2 ast->codecpar->bits_per_coded_sample = read_int(line, &endptr, &error); // audio bits per sample
212 2 av_strlcpy(audio_type, endptr, RPL_LINE_LENGTH);
213 2 ast->codecpar->ch_layout.nb_channels = channels;
214 // At least one sample uses 0 for ADPCM, which is really 4 bits
215 // per sample.
216
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 2 if (ast->codecpar->bits_per_coded_sample == 0)
217 ✗ ast->codecpar->bits_per_coded_sample = 4;
218
219 2 ast->codecpar->bit_rate = ast->codecpar->sample_rate *
220 2 (int64_t)ast->codecpar->ch_layout.nb_channels;
221
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 2 if (ast->codecpar->bit_rate > INT64_MAX / ast->codecpar->bits_per_coded_sample)
222 ✗ return AVERROR_INVALIDDATA;
223 2 ast->codecpar->bit_rate *= ast->codecpar->bits_per_coded_sample;
224
225 2 ast->codecpar->codec_id = AV_CODEC_ID_NONE;
226
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 2 switch (audio_format) {
227 1 case 1:
228
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 1 if (ast->codecpar->bits_per_coded_sample == 16) {
229 // 16-bit audio is always signed
230 1 ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
231 ✗ } else if (ast->codecpar->bits_per_coded_sample == 8) {
232 ✗ if (av_stristr(audio_type, "unsigned") != NULL)
233 ✗ ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
234 ✗ else if (av_stristr(audio_type, "linear") != NULL)
235 ✗ ast->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
236 else
237 ✗ ast->codecpar->codec_id = AV_CODEC_ID_PCM_VIDC;
238 }
239 // There are some other formats listed as legal per the spec;
240 // samples needed.
241 1 break;
242 ✗ case 2:
243 ✗ if (av_stristr(audio_codec, "adpcm") != NULL) {
244 ✗ ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_ACORN;
245 }
246 ✗ break;
247 1 case 101:
248
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 1 if (ast->codecpar->bits_per_coded_sample == 8) {
249 // The samples with this kind of audio that I have
250 // are all unsigned.
251 1 ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
252 ✗ } else if (ast->codecpar->bits_per_coded_sample == 4) {
253 ✗ ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_EA_SEAD;
254 }
255 1 break;
256 }
257
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 2 if (ast->codecpar->codec_id == AV_CODEC_ID_NONE)
258 ✗ avpriv_request_sample(s, "Audio format %"PRId32" (%s)",
259 audio_format, audio_codec);
260 2 avpriv_set_pts_info(ast, 32, 1, ast->codecpar->bit_rate);
261 } else {
262 ✗ for (i = 0; i < 3; i++)
263 ✗ error |= read_line(pb, line, sizeof(line));
264 }
265
266
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 2 if (s->nb_streams == 0)
267 ✗ return AVERROR_INVALIDDATA;
268
269 2 rpl->frames_per_chunk = read_line_and_int(pb, &error); // video frames per chunk
270
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 2 if (vst && rpl->frames_per_chunk > 1 && vst->codecpar->codec_tag != 124)
271 ✗ av_log(s, AV_LOG_WARNING,
272 "Don't know how to split frames for video format %s. "
273 ✗ "Video stream will be broken!\n", av_fourcc2str(vst->codecpar->codec_tag));
274
275 2 number_of_chunks = read_line_and_int(pb, &error); // number of chunks in the file
276
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 2 if (number_of_chunks == INT_MAX)
277 ✗ return AVERROR_INVALIDDATA;
278
279 // The number in the header is actually the index of the last chunk.
280 2 number_of_chunks++;
281
282 2 error |= read_line(pb, line, sizeof(line)); // "even" chunk size in bytes
283 2 error |= read_line(pb, line, sizeof(line)); // "odd" chunk size in bytes
284 chunk_catalog_offset = // offset of the "chunk catalog"
285 2 read_line_and_int(pb, &error); // (file index)
286 2 error |= read_line(pb, line, sizeof(line)); // offset to "helpful" sprite
287 2 error |= read_line(pb, line, sizeof(line)); // size of "helpful" sprite
288
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 2 if (vst) {
289 2 error |= read_line(pb, line, sizeof(line)); // offset to key frame list
290 2 vst->duration = number_of_chunks * (int64_t)rpl->frames_per_chunk;
291 }
292
293 // Read the index
294 2 avio_seek(pb, chunk_catalog_offset, SEEK_SET);
295 2 total_audio_size = 0;
296
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 365 for (i = 0; !error && i < number_of_chunks; i++) {
297 int64_t offset, video_size, audio_size;
298 363 error |= read_line(pb, line, sizeof(line));
299
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 363 if (3 != sscanf(line, "%"SCNd64" , %"SCNd64" ; %"SCNd64,
300 &offset, &video_size, &audio_size)) {
301 ✗ error = -1;
302 ✗ continue;
303 }
304
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 363 if (vst)
305 363 av_add_index_entry(vst, offset, i * rpl->frames_per_chunk,
306 video_size, rpl->frames_per_chunk, 0);
307
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 363 if (ast)
308 363 av_add_index_entry(ast, offset + video_size, total_audio_size,
309 audio_size, audio_size * 8, 0);
310
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 363 if (total_audio_size/8 + (uint64_t)audio_size >= INT64_MAX/8)
311 ✗ return AVERROR_INVALIDDATA;
312 363 total_audio_size += audio_size * 8;
313 }
314
315
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 2 if (error)
316 ✗ return AVERROR(EIO);
317
318 2 return 0;
319 }
320
321 824 static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt)
322 {
323 824 RPLContext *rpl = s->priv_data;
324 824 AVIOContext *pb = s->pb;
325 AVStream* stream;
326 FFStream *sti;
327 AVIndexEntry* index_entry;
328 int ret;
329
330
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 824 if (rpl->chunk_part == s->nb_streams) {
331 363 rpl->chunk_number++;
332 363 rpl->chunk_part = 0;
333 }
334
335 824 stream = s->streams[rpl->chunk_part];
336 824 sti = ffstream(stream);
337
338
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 824 if (rpl->chunk_number >= sti->nb_index_entries)
339 2 return AVERROR_EOF;
340
341 822 index_entry = &sti->index_entries[rpl->chunk_number];
342
343
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 822 if (rpl->frame_in_part == 0) {
344
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 726 if (avio_seek(pb, index_entry->pos, SEEK_SET) < 0)
345 ✗ return AVERROR(EIO);
346 }
347
348
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 822 if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
349
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 559 stream->codecpar->codec_tag == 124) {
350 // We have to split Escape 124 frames because there are
351 // multiple frames per chunk in Escape 124 samples.
352 uint32_t frame_size;
353
354 100 avio_skip(pb, 4); /* flags */
355 100 frame_size = avio_rl32(pb);
356
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 100 if (avio_feof(pb) || avio_seek(pb, -8, SEEK_CUR) < 0 || !frame_size)
357 ✗ return AVERROR(EIO);
358
359 100 ret = av_get_packet(pb, pkt, frame_size);
360
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 100 if (ret < 0)
361 ✗ return ret;
362
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 100 if (ret != frame_size)
363 ✗ return AVERROR(EIO);
364
365 100 pkt->duration = 1;
366 100 pkt->pts = index_entry->timestamp + rpl->frame_in_part;
367 100 pkt->stream_index = rpl->chunk_part;
368
369 100 rpl->frame_in_part++;
370
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 100 if (rpl->frame_in_part == rpl->frames_per_chunk) {
371 4 rpl->frame_in_part = 0;
372 4 rpl->chunk_part++;
373 }
374 } else {
375 722 ret = av_get_packet(pb, pkt, index_entry->size);
376
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 722 if (ret < 0)
377 ✗ return ret;
378
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 722 if (ret != index_entry->size)
379 ✗ return AVERROR(EIO);
380
381
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 722 if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
382 // frames_per_chunk should always be one here; the header
383 // parsing will warn if it isn't.
384 359 pkt->duration = rpl->frames_per_chunk;
385 } else {
386 // All the audio codecs supported in this container
387 // (at least so far) are constant-bitrate.
388 363 pkt->duration = ret * 8;
389 }
390 722 pkt->pts = index_entry->timestamp;
391 722 pkt->stream_index = rpl->chunk_part;
392 722 rpl->chunk_part++;
393 }
394
395 // None of the Escape formats have keyframes, and the ADPCM
396 // format used doesn't have keyframes.
397
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 822 if (rpl->chunk_number == 0 && rpl->frame_in_part == 0)
398 4 pkt->flags |= AV_PKT_FLAG_KEY;
399
400 822 return ret;
401 }
402
403 const FFInputFormat ff_rpl_demuxer = {
404 .p.name = "rpl",
405 .p.long_name = NULL_IF_CONFIG_SMALL("RPL / ARMovie"),
406 .priv_data_size = sizeof(RPLContext),
407 .read_probe = rpl_probe,
408 .read_header = rpl_read_header,
409 .read_packet = rpl_read_packet,
410 };
411