diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/opus_header.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/opus_header.c | 117 |
1 files changed, 20 insertions, 97 deletions
diff --git a/lib/rbcodec/codecs/libopus/opus_header.c b/lib/rbcodec/codecs/libopus/opus_header.c index d00d4fba23..5fe5a7a4f9 100644 --- a/lib/rbcodec/codecs/libopus/opus_header.c +++ b/lib/rbcodec/codecs/libopus/opus_header.c | |||
@@ -44,7 +44,7 @@ | |||
44 | 2..254: reserved, 255: multistream with no mapping) | 44 | 2..254: reserved, 255: multistream with no mapping) |
45 | 45 | ||
46 | - if (mapping != 0) | 46 | - if (mapping != 0) |
47 | - N = totel number of streams (8 bits) | 47 | - N = total number of streams (8 bits) |
48 | - M = number of paired streams (8 bits) | 48 | - M = number of paired streams (8 bits) |
49 | - C times channel origin | 49 | - C times channel origin |
50 | - if (C<2*M) | 50 | - if (C<2*M) |
@@ -58,49 +58,11 @@ | |||
58 | */ | 58 | */ |
59 | 59 | ||
60 | typedef struct { | 60 | typedef struct { |
61 | unsigned char *data; | ||
62 | int maxlen; | ||
63 | int pos; | ||
64 | } Packet; | ||
65 | |||
66 | typedef struct { | ||
67 | const unsigned char *data; | 61 | const unsigned char *data; |
68 | int maxlen; | 62 | int maxlen; |
69 | int pos; | 63 | int pos; |
70 | } ROPacket; | 64 | } ROPacket; |
71 | 65 | ||
72 | static int write_uint32(Packet *p, ogg_uint32_t val) | ||
73 | { | ||
74 | if (p->pos>p->maxlen-4) | ||
75 | return 0; | ||
76 | p->data[p->pos ] = (val ) & 0xFF; | ||
77 | p->data[p->pos+1] = (val>> 8) & 0xFF; | ||
78 | p->data[p->pos+2] = (val>>16) & 0xFF; | ||
79 | p->data[p->pos+3] = (val>>24) & 0xFF; | ||
80 | p->pos += 4; | ||
81 | return 1; | ||
82 | } | ||
83 | |||
84 | static int write_uint16(Packet *p, ogg_uint16_t val) | ||
85 | { | ||
86 | if (p->pos>p->maxlen-2) | ||
87 | return 0; | ||
88 | p->data[p->pos ] = (val ) & 0xFF; | ||
89 | p->data[p->pos+1] = (val>> 8) & 0xFF; | ||
90 | p->pos += 2; | ||
91 | return 1; | ||
92 | } | ||
93 | |||
94 | static int write_chars(Packet *p, const unsigned char *str, int nb_chars) | ||
95 | { | ||
96 | int i; | ||
97 | if (p->pos>p->maxlen-nb_chars) | ||
98 | return 0; | ||
99 | for (i=0;i<nb_chars;i++) | ||
100 | p->data[p->pos++] = str[i]; | ||
101 | return 1; | ||
102 | } | ||
103 | |||
104 | static int read_uint32(ROPacket *p, ogg_uint32_t *val) | 66 | static int read_uint32(ROPacket *p, ogg_uint32_t *val) |
105 | { | 67 | { |
106 | if (p->pos>p->maxlen-4) | 68 | if (p->pos>p->maxlen-4) |
@@ -194,12 +156,28 @@ int opus_header_parse(const unsigned char *packet, int len, OpusHeader *h) | |||
194 | h->nb_coupled = ch; | 156 | h->nb_coupled = ch; |
195 | 157 | ||
196 | /* Multi-stream support */ | 158 | /* Multi-stream support */ |
197 | for (i=0;i<h->channels;i++) | 159 | if (h->channel_mapping == 3) |
198 | { | 160 | { |
199 | if (!read_chars(&p, &h->stream_map[i], 1)) | 161 | int dmatrix_size = h->channels * (h->nb_streams + h->nb_coupled) * 2; |
162 | if (dmatrix_size > len - p.pos) | ||
200 | return 0; | 163 | return 0; |
201 | if (h->stream_map[i]>(h->nb_streams+h->nb_coupled) && h->stream_map[i]!=255) | 164 | if (dmatrix_size > OPUS_DEMIXING_MATRIX_SIZE_MAX) |
165 | p.pos += dmatrix_size; | ||
166 | else if (!read_chars(&p, h->dmatrix, dmatrix_size)) | ||
202 | return 0; | 167 | return 0; |
168 | for (i=0;i<h->channels;i++) { | ||
169 | h->stream_map[i] = i; | ||
170 | } | ||
171 | } | ||
172 | else | ||
173 | { | ||
174 | for (i=0;i<h->channels;i++) | ||
175 | { | ||
176 | if (!read_chars(&p, &h->stream_map[i], 1)) | ||
177 | return 0; | ||
178 | if (h->stream_map[i]>(h->nb_streams+h->nb_coupled) && h->stream_map[i]!=255) | ||
179 | return 0; | ||
180 | } | ||
203 | } | 181 | } |
204 | } else { | 182 | } else { |
205 | if(h->channels>2) | 183 | if(h->channels>2) |
@@ -216,61 +194,6 @@ int opus_header_parse(const unsigned char *packet, int len, OpusHeader *h) | |||
216 | return 1; | 194 | return 1; |
217 | } | 195 | } |
218 | 196 | ||
219 | int opus_header_to_packet(const OpusHeader *h, unsigned char *packet, int len) | ||
220 | { | ||
221 | int i; | ||
222 | Packet p; | ||
223 | unsigned char ch; | ||
224 | |||
225 | p.data = packet; | ||
226 | p.maxlen = len; | ||
227 | p.pos = 0; | ||
228 | if (len<19)return 0; | ||
229 | if (!write_chars(&p, (const unsigned char*)"OpusHead", 8)) | ||
230 | return 0; | ||
231 | /* Version is 1 */ | ||
232 | ch = 1; | ||
233 | if (!write_chars(&p, &ch, 1)) | ||
234 | return 0; | ||
235 | |||
236 | ch = h->channels; | ||
237 | if (!write_chars(&p, &ch, 1)) | ||
238 | return 0; | ||
239 | |||
240 | if (!write_uint16(&p, h->preskip)) | ||
241 | return 0; | ||
242 | |||
243 | if (!write_uint32(&p, h->input_sample_rate)) | ||
244 | return 0; | ||
245 | |||
246 | if (!write_uint16(&p, h->gain)) | ||
247 | return 0; | ||
248 | |||
249 | ch = h->channel_mapping; | ||
250 | if (!write_chars(&p, &ch, 1)) | ||
251 | return 0; | ||
252 | |||
253 | if (h->channel_mapping != 0) | ||
254 | { | ||
255 | ch = h->nb_streams; | ||
256 | if (!write_chars(&p, &ch, 1)) | ||
257 | return 0; | ||
258 | |||
259 | ch = h->nb_coupled; | ||
260 | if (!write_chars(&p, &ch, 1)) | ||
261 | return 0; | ||
262 | |||
263 | /* Multi-stream support */ | ||
264 | for (i=0;i<h->channels;i++) | ||
265 | { | ||
266 | if (!write_chars(&p, &h->stream_map[i], 1)) | ||
267 | return 0; | ||
268 | } | ||
269 | } | ||
270 | |||
271 | return p.pos; | ||
272 | } | ||
273 | |||
274 | /* This is just here because it's a convenient file linked by both opusenc and | 197 | /* This is just here because it's a convenient file linked by both opusenc and |
275 | opusdec (to guarantee this maps stays in sync). */ | 198 | opusdec (to guarantee this maps stays in sync). */ |
276 | const int wav_permute_matrix[8][8] = | 199 | const int wav_permute_matrix[8][8] = |