media/libvpx/vpx/src/vpx_encoder.c@ac0c01689b40
media/libvpx/vpx/src/vpx_encoder.c
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
12 /*!\file
13 * \brief Provides the high level interface to wrap encoder algorithms.
14 *
15 */
16 #include <limits.h>
17 #include <string.h>
18 #include "vpx/internal/vpx_codec_internal.h"
19 #include "vpx_config.h"
21 #define SAVE_STATUS(ctx,var) (ctx?(ctx->err = var):var)
23 vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t *ctx,
24 vpx_codec_iface_t *iface,
25 vpx_codec_enc_cfg_t *cfg,
26 vpx_codec_flags_t flags,
27 int ver) {
28 vpx_codec_err_t res;
30 if (ver != VPX_ENCODER_ABI_VERSION)
31 res = VPX_CODEC_ABI_MISMATCH;
32 else if (!ctx || !iface || !cfg)
33 res = VPX_CODEC_INVALID_PARAM;
34 else if (iface->abi_version != VPX_CODEC_INTERNAL_ABI_VERSION)
35 res = VPX_CODEC_ABI_MISMATCH;
36 else if (!(iface->caps & VPX_CODEC_CAP_ENCODER))
37 res = VPX_CODEC_INCAPABLE;
38 else if ((flags & VPX_CODEC_USE_XMA) && !(iface->caps & VPX_CODEC_CAP_XMA))
39 res = VPX_CODEC_INCAPABLE;
40 else if ((flags & VPX_CODEC_USE_PSNR)
41 && !(iface->caps & VPX_CODEC_CAP_PSNR))
42 res = VPX_CODEC_INCAPABLE;
43 else if ((flags & VPX_CODEC_USE_OUTPUT_PARTITION)
44 && !(iface->caps & VPX_CODEC_CAP_OUTPUT_PARTITION))
45 res = VPX_CODEC_INCAPABLE;
46 else {
47 ctx->iface = iface;
48 ctx->name = iface->name;
49 ctx->priv = NULL;
50 ctx->init_flags = flags;
51 ctx->config.enc = cfg;
52 res = ctx->iface->init(ctx, NULL);
54 if (res) {
55 ctx->err_detail = ctx->priv ? ctx->priv->err_detail : NULL;
56 vpx_codec_destroy(ctx);
57 }
59 if (ctx->priv)
60 ctx->priv->iface = ctx->iface;
61 }
63 return SAVE_STATUS(ctx, res);
64 }
66 vpx_codec_err_t vpx_codec_enc_init_multi_ver(vpx_codec_ctx_t *ctx,
67 vpx_codec_iface_t *iface,
68 vpx_codec_enc_cfg_t *cfg,
69 int num_enc,
70 vpx_codec_flags_t flags,
71 vpx_rational_t *dsf,
72 int ver) {
73 vpx_codec_err_t res = 0;
75 if (ver != VPX_ENCODER_ABI_VERSION)
76 res = VPX_CODEC_ABI_MISMATCH;
77 else if (!ctx || !iface || !cfg || (num_enc > 16 || num_enc < 1))
78 res = VPX_CODEC_INVALID_PARAM;
79 else if (iface->abi_version != VPX_CODEC_INTERNAL_ABI_VERSION)
80 res = VPX_CODEC_ABI_MISMATCH;
81 else if (!(iface->caps & VPX_CODEC_CAP_ENCODER))
82 res = VPX_CODEC_INCAPABLE;
83 else if ((flags & VPX_CODEC_USE_XMA) && !(iface->caps & VPX_CODEC_CAP_XMA))
84 res = VPX_CODEC_INCAPABLE;
85 else if ((flags & VPX_CODEC_USE_PSNR)
86 && !(iface->caps & VPX_CODEC_CAP_PSNR))
87 res = VPX_CODEC_INCAPABLE;
88 else if ((flags & VPX_CODEC_USE_OUTPUT_PARTITION)
89 && !(iface->caps & VPX_CODEC_CAP_OUTPUT_PARTITION))
90 res = VPX_CODEC_INCAPABLE;
91 else {
92 int i;
93 void *mem_loc = NULL;
95 if (!(res = iface->enc.mr_get_mem_loc(cfg, &mem_loc))) {
96 for (i = 0; i < num_enc; i++) {
97 vpx_codec_priv_enc_mr_cfg_t mr_cfg;
99 /* Validate down-sampling factor. */
100 if (dsf->num < 1 || dsf->num > 4096 || dsf->den < 1 ||
101 dsf->den > dsf->num) {
102 res = VPX_CODEC_INVALID_PARAM;
103 break;
104 }
106 mr_cfg.mr_low_res_mode_info = mem_loc;
107 mr_cfg.mr_total_resolutions = num_enc;
108 mr_cfg.mr_encoder_id = num_enc - 1 - i;
109 mr_cfg.mr_down_sampling_factor.num = dsf->num;
110 mr_cfg.mr_down_sampling_factor.den = dsf->den;
112 /* Force Key-frame synchronization. Namely, encoder at higher
113 * resolution always use the same frame_type chosen by the
114 * lowest-resolution encoder.
115 */
116 if (mr_cfg.mr_encoder_id)
117 cfg->kf_mode = VPX_KF_DISABLED;
119 ctx->iface = iface;
120 ctx->name = iface->name;
121 ctx->priv = NULL;
122 ctx->init_flags = flags;
123 ctx->config.enc = cfg;
124 res = ctx->iface->init(ctx, &mr_cfg);
126 if (res) {
127 const char *error_detail =
128 ctx->priv ? ctx->priv->err_detail : NULL;
129 /* Destroy current ctx */
130 ctx->err_detail = error_detail;
131 vpx_codec_destroy(ctx);
133 /* Destroy already allocated high-level ctx */
134 while (i) {
135 ctx--;
136 ctx->err_detail = error_detail;
137 vpx_codec_destroy(ctx);
138 i--;
139 }
140 }
142 if (ctx->priv)
143 ctx->priv->iface = ctx->iface;
145 if (res)
146 break;
148 ctx++;
149 cfg++;
150 dsf++;
151 }
152 }
153 }
155 return SAVE_STATUS(ctx, res);
156 }
159 vpx_codec_err_t vpx_codec_enc_config_default(vpx_codec_iface_t *iface,
160 vpx_codec_enc_cfg_t *cfg,
161 unsigned int usage) {
162 vpx_codec_err_t res;
163 vpx_codec_enc_cfg_map_t *map;
165 if (!iface || !cfg || usage > INT_MAX)
166 res = VPX_CODEC_INVALID_PARAM;
167 else if (!(iface->caps & VPX_CODEC_CAP_ENCODER))
168 res = VPX_CODEC_INCAPABLE;
169 else {
170 res = VPX_CODEC_INVALID_PARAM;
172 for (map = iface->enc.cfg_maps; map->usage >= 0; map++) {
173 if (map->usage == (int)usage) {
174 *cfg = map->cfg;
175 cfg->g_usage = usage;
176 res = VPX_CODEC_OK;
177 break;
178 }
179 }
180 }
182 return res;
183 }
186 #if ARCH_X86 || ARCH_X86_64
187 /* On X86, disable the x87 unit's internal 80 bit precision for better
188 * consistency with the SSE unit's 64 bit precision.
189 */
190 #include "vpx_ports/x86.h"
191 #define FLOATING_POINT_INIT() do {\
192 unsigned short x87_orig_mode = x87_set_double_precision();
193 #define FLOATING_POINT_RESTORE() \
194 x87_set_control_word(x87_orig_mode); }while(0)
197 #else
198 static void FLOATING_POINT_INIT() {}
199 static void FLOATING_POINT_RESTORE() {}
200 #endif
203 vpx_codec_err_t vpx_codec_encode(vpx_codec_ctx_t *ctx,
204 const vpx_image_t *img,
205 vpx_codec_pts_t pts,
206 unsigned long duration,
207 vpx_enc_frame_flags_t flags,
208 unsigned long deadline) {
209 vpx_codec_err_t res = 0;
211 if (!ctx || (img && !duration))
212 res = VPX_CODEC_INVALID_PARAM;
213 else if (!ctx->iface || !ctx->priv)
214 res = VPX_CODEC_ERROR;
215 else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
216 res = VPX_CODEC_INCAPABLE;
217 else {
218 unsigned int num_enc = ctx->priv->enc.total_encoders;
220 /* Execute in a normalized floating point environment, if the platform
221 * requires it.
222 */
223 FLOATING_POINT_INIT();
225 if (num_enc == 1)
226 res = ctx->iface->enc.encode(ctx->priv->alg_priv, img, pts,
227 duration, flags, deadline);
228 else {
229 /* Multi-resolution encoding:
230 * Encode multi-levels in reverse order. For example,
231 * if mr_total_resolutions = 3, first encode level 2,
232 * then encode level 1, and finally encode level 0.
233 */
234 int i;
236 ctx += num_enc - 1;
237 if (img) img += num_enc - 1;
239 for (i = num_enc - 1; i >= 0; i--) {
240 if ((res = ctx->iface->enc.encode(ctx->priv->alg_priv, img, pts,
241 duration, flags, deadline)))
242 break;
244 ctx--;
245 if (img) img--;
246 }
247 ctx++;
248 }
250 FLOATING_POINT_RESTORE();
251 }
253 return SAVE_STATUS(ctx, res);
254 }
257 const vpx_codec_cx_pkt_t *vpx_codec_get_cx_data(vpx_codec_ctx_t *ctx,
258 vpx_codec_iter_t *iter) {
259 const vpx_codec_cx_pkt_t *pkt = NULL;
261 if (ctx) {
262 if (!iter)
263 ctx->err = VPX_CODEC_INVALID_PARAM;
264 else if (!ctx->iface || !ctx->priv)
265 ctx->err = VPX_CODEC_ERROR;
266 else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
267 ctx->err = VPX_CODEC_INCAPABLE;
268 else
269 pkt = ctx->iface->enc.get_cx_data(ctx->priv->alg_priv, iter);
270 }
272 if (pkt && pkt->kind == VPX_CODEC_CX_FRAME_PKT) {
273 /* If the application has specified a destination area for the
274 * compressed data, and the codec has not placed the data there,
275 * and it fits, copy it.
276 */
277 char *dst_buf = ctx->priv->enc.cx_data_dst_buf.buf;
279 if (dst_buf
280 && pkt->data.raw.buf != dst_buf
281 && pkt->data.raw.sz
282 + ctx->priv->enc.cx_data_pad_before
283 + ctx->priv->enc.cx_data_pad_after
284 <= ctx->priv->enc.cx_data_dst_buf.sz) {
285 vpx_codec_cx_pkt_t *modified_pkt = &ctx->priv->enc.cx_data_pkt;
287 memcpy(dst_buf + ctx->priv->enc.cx_data_pad_before,
288 pkt->data.raw.buf, pkt->data.raw.sz);
289 *modified_pkt = *pkt;
290 modified_pkt->data.raw.buf = dst_buf;
291 modified_pkt->data.raw.sz += ctx->priv->enc.cx_data_pad_before
292 + ctx->priv->enc.cx_data_pad_after;
293 pkt = modified_pkt;
294 }
296 if (dst_buf == pkt->data.raw.buf) {
297 ctx->priv->enc.cx_data_dst_buf.buf = dst_buf + pkt->data.raw.sz;
298 ctx->priv->enc.cx_data_dst_buf.sz -= pkt->data.raw.sz;
299 }
300 }
302 return pkt;
303 }
306 vpx_codec_err_t vpx_codec_set_cx_data_buf(vpx_codec_ctx_t *ctx,
307 const vpx_fixed_buf_t *buf,
308 unsigned int pad_before,
309 unsigned int pad_after) {
310 if (!ctx || !ctx->priv)
311 return VPX_CODEC_INVALID_PARAM;
313 if (buf) {
314 ctx->priv->enc.cx_data_dst_buf = *buf;
315 ctx->priv->enc.cx_data_pad_before = pad_before;
316 ctx->priv->enc.cx_data_pad_after = pad_after;
317 } else {
318 ctx->priv->enc.cx_data_dst_buf.buf = NULL;
319 ctx->priv->enc.cx_data_dst_buf.sz = 0;
320 ctx->priv->enc.cx_data_pad_before = 0;
321 ctx->priv->enc.cx_data_pad_after = 0;
322 }
324 return VPX_CODEC_OK;
325 }
328 const vpx_image_t *vpx_codec_get_preview_frame(vpx_codec_ctx_t *ctx) {
329 vpx_image_t *img = NULL;
331 if (ctx) {
332 if (!ctx->iface || !ctx->priv)
333 ctx->err = VPX_CODEC_ERROR;
334 else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
335 ctx->err = VPX_CODEC_INCAPABLE;
336 else if (!ctx->iface->enc.get_preview)
337 ctx->err = VPX_CODEC_INCAPABLE;
338 else
339 img = ctx->iface->enc.get_preview(ctx->priv->alg_priv);
340 }
342 return img;
343 }
346 vpx_fixed_buf_t *vpx_codec_get_global_headers(vpx_codec_ctx_t *ctx) {
347 vpx_fixed_buf_t *buf = NULL;
349 if (ctx) {
350 if (!ctx->iface || !ctx->priv)
351 ctx->err = VPX_CODEC_ERROR;
352 else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
353 ctx->err = VPX_CODEC_INCAPABLE;
354 else if (!ctx->iface->enc.get_glob_hdrs)
355 ctx->err = VPX_CODEC_INCAPABLE;
356 else
357 buf = ctx->iface->enc.get_glob_hdrs(ctx->priv->alg_priv);
358 }
360 return buf;
361 }
364 vpx_codec_err_t vpx_codec_enc_config_set(vpx_codec_ctx_t *ctx,
365 const vpx_codec_enc_cfg_t *cfg) {
366 vpx_codec_err_t res;
368 if (!ctx || !ctx->iface || !ctx->priv || !cfg)
369 res = VPX_CODEC_INVALID_PARAM;
370 else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
371 res = VPX_CODEC_INCAPABLE;
372 else
373 res = ctx->iface->enc.cfg_set(ctx->priv->alg_priv, cfg);
375 return SAVE_STATUS(ctx, res);
376 }
379 int vpx_codec_pkt_list_add(struct vpx_codec_pkt_list *list,
380 const struct vpx_codec_cx_pkt *pkt) {
381 if (list->cnt < list->max) {
382 list->pkts[list->cnt++] = *pkt;
383 return 0;
384 }
386 return 1;
387 }
390 const vpx_codec_cx_pkt_t *vpx_codec_pkt_list_get(struct vpx_codec_pkt_list *list,
391 vpx_codec_iter_t *iter) {
392 const vpx_codec_cx_pkt_t *pkt;
394 if (!(*iter)) {
395 *iter = list->pkts;
396 }
398 pkt = (const void *) * iter;
400 if ((size_t)(pkt - list->pkts) < list->cnt)
401 *iter = pkt + 1;
402 else
403 pkt = NULL;
405 return pkt;
406 }
