lavc: Make AVPacket.duration int64, and deprecate convergence_duration
[libav.git] / libavcodec / avpacket.c
1 /*
2 * AVPacket functions for libavcodec
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/common.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/mem.h"
29 #include "avcodec.h"
30
31 void av_init_packet(AVPacket *pkt)
32 {
33 pkt->pts = AV_NOPTS_VALUE;
34 pkt->dts = AV_NOPTS_VALUE;
35 pkt->pos = -1;
36 pkt->duration = 0;
37 #if FF_API_CONVERGENCE_DURATION
38 FF_DISABLE_DEPRECATION_WARNINGS
39 pkt->convergence_duration = 0;
40 FF_ENABLE_DEPRECATION_WARNINGS
41 #endif
42 pkt->flags = 0;
43 pkt->stream_index = 0;
44 pkt->buf = NULL;
45 pkt->side_data = NULL;
46 pkt->side_data_elems = 0;
47 }
48
49 static int packet_alloc(AVBufferRef **buf, int size)
50 {
51 int ret;
52 if ((unsigned)size >= (unsigned)size + AV_INPUT_BUFFER_PADDING_SIZE)
53 return AVERROR(EINVAL);
54
55 ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
56 if (ret < 0)
57 return ret;
58
59 memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
60
61 return 0;
62 }
63
64 int av_new_packet(AVPacket *pkt, int size)
65 {
66 AVBufferRef *buf = NULL;
67 int ret = packet_alloc(&buf, size);
68 if (ret < 0)
69 return ret;
70
71 av_init_packet(pkt);
72 pkt->buf = buf;
73 pkt->data = buf->data;
74 pkt->size = size;
75
76 return 0;
77 }
78
79 void av_shrink_packet(AVPacket *pkt, int size)
80 {
81 if (pkt->size <= size)
82 return;
83 pkt->size = size;
84 memset(pkt->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
85 }
86
87 int av_grow_packet(AVPacket *pkt, int grow_by)
88 {
89 int new_size;
90 av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
91 if (!pkt->size)
92 return av_new_packet(pkt, grow_by);
93 if ((unsigned)grow_by >
94 INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
95 return -1;
96
97 new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
98 if (pkt->buf) {
99 int ret = av_buffer_realloc(&pkt->buf, new_size);
100 if (ret < 0)
101 return ret;
102 } else {
103 pkt->buf = av_buffer_alloc(new_size);
104 if (!pkt->buf)
105 return AVERROR(ENOMEM);
106 memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
107 }
108 pkt->data = pkt->buf->data;
109 pkt->size += grow_by;
110 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
111
112 return 0;
113 }
114
115 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
116 {
117 if (size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
118 return AVERROR(EINVAL);
119
120 pkt->buf = av_buffer_create(data, size + AV_INPUT_BUFFER_PADDING_SIZE,
121 av_buffer_default_free, NULL, 0);
122 if (!pkt->buf)
123 return AVERROR(ENOMEM);
124
125 pkt->data = data;
126 pkt->size = size;
127
128 return 0;
129 }
130
131 #define ALLOC_MALLOC(data, size) data = av_malloc(size)
132 #define ALLOC_BUF(data, size) \
133 do { \
134 av_buffer_realloc(&pkt->buf, size); \
135 data = pkt->buf ? pkt->buf->data : NULL; \
136 } while (0)
137
138 #define DUP_DATA(dst, src, size, padding, ALLOC) \
139 do { \
140 void *data; \
141 if (padding) { \
142 if ((unsigned)(size) > \
143 (unsigned)(size) + AV_INPUT_BUFFER_PADDING_SIZE) \
144 goto failed_alloc; \
145 ALLOC(data, size + AV_INPUT_BUFFER_PADDING_SIZE); \
146 } else { \
147 ALLOC(data, size); \
148 } \
149 if (!data) \
150 goto failed_alloc; \
151 memcpy(data, src, size); \
152 if (padding) \
153 memset((uint8_t *)data + size, 0, \
154 AV_INPUT_BUFFER_PADDING_SIZE); \
155 dst = data; \
156 } while (0)
157
158 int av_dup_packet(AVPacket *pkt)
159 {
160 AVPacket tmp_pkt;
161
162 if (!pkt->buf && pkt->data) {
163 tmp_pkt = *pkt;
164
165 pkt->data = NULL;
166 pkt->side_data = NULL;
167 DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1, ALLOC_BUF);
168
169 if (pkt->side_data_elems) {
170 int i;
171
172 DUP_DATA(pkt->side_data, tmp_pkt.side_data,
173 pkt->side_data_elems * sizeof(*pkt->side_data), 0, ALLOC_MALLOC);
174 memset(pkt->side_data, 0,
175 pkt->side_data_elems * sizeof(*pkt->side_data));
176 for (i = 0; i < pkt->side_data_elems; i++) {
177 DUP_DATA(pkt->side_data[i].data, tmp_pkt.side_data[i].data,
178 tmp_pkt.side_data[i].size, 1, ALLOC_MALLOC);
179 pkt->side_data[i].size = tmp_pkt.side_data[i].size;
180 pkt->side_data[i].type = tmp_pkt.side_data[i].type;
181 }
182 }
183 }
184 return 0;
185
186 failed_alloc:
187 av_free_packet(pkt);
188 return AVERROR(ENOMEM);
189 }
190
191 void av_packet_free_side_data(AVPacket *pkt)
192 {
193 int i;
194 for (i = 0; i < pkt->side_data_elems; i++)
195 av_free(pkt->side_data[i].data);
196 av_freep(&pkt->side_data);
197 pkt->side_data_elems = 0;
198 }
199
200 void av_free_packet(AVPacket *pkt)
201 {
202 if (pkt) {
203 if (pkt->buf)
204 av_buffer_unref(&pkt->buf);
205 pkt->data = NULL;
206 pkt->size = 0;
207
208 av_packet_free_side_data(pkt);
209 }
210 }
211
212 uint8_t *av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
213 int size)
214 {
215 int elems = pkt->side_data_elems;
216
217 if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data))
218 return NULL;
219 if ((unsigned)size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
220 return NULL;
221
222 pkt->side_data = av_realloc(pkt->side_data,
223 (elems + 1) * sizeof(*pkt->side_data));
224 if (!pkt->side_data)
225 return NULL;
226
227 pkt->side_data[elems].data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
228 if (!pkt->side_data[elems].data)
229 return NULL;
230 pkt->side_data[elems].size = size;
231 pkt->side_data[elems].type = type;
232 pkt->side_data_elems++;
233
234 return pkt->side_data[elems].data;
235 }
236
237 uint8_t *av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
238 int *size)
239 {
240 int i;
241
242 for (i = 0; i < pkt->side_data_elems; i++) {
243 if (pkt->side_data[i].type == type) {
244 if (size)
245 *size = pkt->side_data[i].size;
246 return pkt->side_data[i].data;
247 }
248 }
249 return NULL;
250 }
251
252 int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
253 int size)
254 {
255 int i;
256
257 for (i = 0; i < pkt->side_data_elems; i++) {
258 if (pkt->side_data[i].type == type) {
259 if (size > pkt->side_data[i].size)
260 return AVERROR(ENOMEM);
261 pkt->side_data[i].size = size;
262 return 0;
263 }
264 }
265 return AVERROR(ENOENT);
266 }
267
268 int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
269 {
270 int i;
271
272 dst->pts = src->pts;
273 dst->dts = src->dts;
274 dst->pos = src->pos;
275 dst->duration = src->duration;
276 #if FF_API_CONVERGENCE_DURATION
277 FF_DISABLE_DEPRECATION_WARNINGS
278 dst->convergence_duration = src->convergence_duration;
279 FF_ENABLE_DEPRECATION_WARNINGS
280 #endif
281 dst->flags = src->flags;
282 dst->stream_index = src->stream_index;
283
284 for (i = 0; i < src->side_data_elems; i++) {
285 enum AVPacketSideDataType type = src->side_data[i].type;
286 int size = src->side_data[i].size;
287 uint8_t *src_data = src->side_data[i].data;
288 uint8_t *dst_data = av_packet_new_side_data(dst, type, size);
289
290 if (!dst_data) {
291 av_packet_free_side_data(dst);
292 return AVERROR(ENOMEM);
293 }
294 memcpy(dst_data, src_data, size);
295 }
296
297 return 0;
298 }
299
300 void av_packet_unref(AVPacket *pkt)
301 {
302 av_packet_free_side_data(pkt);
303 av_buffer_unref(&pkt->buf);
304 av_init_packet(pkt);
305 pkt->data = NULL;
306 pkt->size = 0;
307 }
308
309 int av_packet_ref(AVPacket *dst, AVPacket *src)
310 {
311 int ret;
312
313 ret = av_packet_copy_props(dst, src);
314 if (ret < 0)
315 return ret;
316
317 if (!src->buf) {
318 ret = packet_alloc(&dst->buf, src->size);
319 if (ret < 0)
320 goto fail;
321 memcpy(dst->buf->data, src->data, src->size);
322 } else {
323 dst->buf = av_buffer_ref(src->buf);
324 if (!dst->buf) {
325 ret = AVERROR(ENOMEM);
326 goto fail;
327 }
328 }
329
330 dst->size = src->size;
331 dst->data = dst->buf->data;
332 return 0;
333 fail:
334 av_packet_free_side_data(dst);
335 return ret;
336 }
337
338 void av_packet_move_ref(AVPacket *dst, AVPacket *src)
339 {
340 *dst = *src;
341 av_init_packet(src);
342 }
343
344 void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
345 {
346 if (pkt->pts != AV_NOPTS_VALUE)
347 pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb);
348 if (pkt->dts != AV_NOPTS_VALUE)
349 pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb);
350 if (pkt->duration > 0)
351 pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb);
352 #if FF_API_CONVERGENCE_DURATION
353 FF_DISABLE_DEPRECATION_WARNINGS
354 if (pkt->convergence_duration > 0)
355 pkt->convergence_duration = av_rescale_q(pkt->convergence_duration, src_tb, dst_tb);
356 FF_ENABLE_DEPRECATION_WARNINGS
357 #endif
358 }