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media/libvpx/vpx/src/vpx_decoder.c@ac0c01689b40 (annotated)

media/libvpx/vpx/src/vpx_decoder.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.

michael@0	1	/*
michael@0	2	* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license
michael@0	5	* that can be found in the LICENSE file in the root of the source
michael@0	6	* tree. An additional intellectual property rights grant can be found
michael@0	7	* in the file PATENTS. All contributing project authors may
michael@0	8	* be found in the AUTHORS file in the root of the source tree.
michael@0	9	*/
michael@0	10
michael@0	11
michael@0	12	/*!\file
michael@0	13	* \brief Provides the high level interface to wrap decoder algorithms.
michael@0	14	*
michael@0	15	*/
michael@0	16	#include <string.h>
michael@0	17	#include "vpx/internal/vpx_codec_internal.h"
michael@0	18
michael@0	19	#define SAVE_STATUS(ctx,var) (ctx?(ctx->err = var):var)
michael@0	20
michael@0	21	vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx,
michael@0	22	vpx_codec_iface_t *iface,
michael@0	23	vpx_codec_dec_cfg_t *cfg,
michael@0	24	vpx_codec_flags_t flags,
michael@0	25	int ver) {
michael@0	26	vpx_codec_err_t res;
michael@0	27
michael@0	28	if (ver != VPX_DECODER_ABI_VERSION)
michael@0	29	res = VPX_CODEC_ABI_MISMATCH;
michael@0	30	else if (!ctx || !iface)
michael@0	31	res = VPX_CODEC_INVALID_PARAM;
michael@0	32	else if (iface->abi_version != VPX_CODEC_INTERNAL_ABI_VERSION)
michael@0	33	res = VPX_CODEC_ABI_MISMATCH;
michael@0	34	else if ((flags & VPX_CODEC_USE_XMA) && !(iface->caps & VPX_CODEC_CAP_XMA))
michael@0	35	res = VPX_CODEC_INCAPABLE;
michael@0	36	else if ((flags & VPX_CODEC_USE_POSTPROC) && !(iface->caps & VPX_CODEC_CAP_POSTPROC))
michael@0	37	res = VPX_CODEC_INCAPABLE;
michael@0	38	else if ((flags & VPX_CODEC_USE_ERROR_CONCEALMENT) &&
michael@0	39	!(iface->caps & VPX_CODEC_CAP_ERROR_CONCEALMENT))
michael@0	40	res = VPX_CODEC_INCAPABLE;
michael@0	41	else if ((flags & VPX_CODEC_USE_INPUT_FRAGMENTS) &&
michael@0	42	!(iface->caps & VPX_CODEC_CAP_INPUT_FRAGMENTS))
michael@0	43	res = VPX_CODEC_INCAPABLE;
michael@0	44	else if (!(iface->caps & VPX_CODEC_CAP_DECODER))
michael@0	45	res = VPX_CODEC_INCAPABLE;
michael@0	46	else {
michael@0	47	memset(ctx, 0, sizeof(*ctx));
michael@0	48	ctx->iface = iface;
michael@0	49	ctx->name = iface->name;
michael@0	50	ctx->priv = NULL;
michael@0	51	ctx->init_flags = flags;
michael@0	52	ctx->config.dec = cfg;
michael@0	53	res = VPX_CODEC_OK;
michael@0	54
michael@0	55	if (!(flags & VPX_CODEC_USE_XMA)) {
michael@0	56	res = ctx->iface->init(ctx, NULL);
michael@0	57
michael@0	58	if (res) {
michael@0	59	ctx->err_detail = ctx->priv ? ctx->priv->err_detail : NULL;
michael@0	60	vpx_codec_destroy(ctx);
michael@0	61	}
michael@0	62
michael@0	63	if (ctx->priv)
michael@0	64	ctx->priv->iface = ctx->iface;
michael@0	65	}
michael@0	66	}
michael@0	67
michael@0	68	return SAVE_STATUS(ctx, res);
michael@0	69	}
michael@0	70
michael@0	71
michael@0	72	vpx_codec_err_t vpx_codec_peek_stream_info(vpx_codec_iface_t *iface,
michael@0	73	const uint8_t *data,
michael@0	74	unsigned int data_sz,
michael@0	75	vpx_codec_stream_info_t *si) {
michael@0	76	vpx_codec_err_t res;
michael@0	77
michael@0	78	if (!iface || !data || !data_sz || !si
michael@0	79	|| si->sz < sizeof(vpx_codec_stream_info_t))
michael@0	80	res = VPX_CODEC_INVALID_PARAM;
michael@0	81	else {
michael@0	82	/* Set default/unknown values */
michael@0	83	si->w = 0;
michael@0	84	si->h = 0;
michael@0	85
michael@0	86	res = iface->dec.peek_si(data, data_sz, si);
michael@0	87	}
michael@0	88
michael@0	89	return res;
michael@0	90	}
michael@0	91
michael@0	92
michael@0	93	vpx_codec_err_t vpx_codec_get_stream_info(vpx_codec_ctx_t *ctx,
michael@0	94	vpx_codec_stream_info_t *si) {
michael@0	95	vpx_codec_err_t res;
michael@0	96
michael@0	97	if (!ctx || !si || si->sz < sizeof(vpx_codec_stream_info_t))
michael@0	98	res = VPX_CODEC_INVALID_PARAM;
michael@0	99	else if (!ctx->iface || !ctx->priv)
michael@0	100	res = VPX_CODEC_ERROR;
michael@0	101	else {
michael@0	102	/* Set default/unknown values */
michael@0	103	si->w = 0;
michael@0	104	si->h = 0;
michael@0	105
michael@0	106	res = ctx->iface->dec.get_si(ctx->priv->alg_priv, si);
michael@0	107	}
michael@0	108
michael@0	109	return SAVE_STATUS(ctx, res);
michael@0	110	}
michael@0	111
michael@0	112
michael@0	113	vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx,
michael@0	114	const uint8_t *data,
michael@0	115	unsigned int data_sz,
michael@0	116	void *user_priv,
michael@0	117	long deadline) {
michael@0	118	vpx_codec_err_t res;
michael@0	119
michael@0	120	/* Sanity checks */
michael@0	121	/* NULL data ptr allowed if data_sz is 0 too */
michael@0	122	if (!ctx || (!data && data_sz))
michael@0	123	res = VPX_CODEC_INVALID_PARAM;
michael@0	124	else if (!ctx->iface || !ctx->priv)
michael@0	125	res = VPX_CODEC_ERROR;
michael@0	126	else {
michael@0	127	res = ctx->iface->dec.decode(ctx->priv->alg_priv, data, data_sz,
michael@0	128	user_priv, deadline);
michael@0	129	}
michael@0	130
michael@0	131	return SAVE_STATUS(ctx, res);
michael@0	132	}
michael@0	133
michael@0	134	vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t *ctx,
michael@0	135	vpx_codec_iter_t *iter) {
michael@0	136	vpx_image_t *img;
michael@0	137
michael@0	138	if (!ctx || !iter || !ctx->iface || !ctx->priv)
michael@0	139	img = NULL;
michael@0	140	else
michael@0	141	img = ctx->iface->dec.get_frame(ctx->priv->alg_priv, iter);
michael@0	142
michael@0	143	return img;
michael@0	144	}
michael@0	145
michael@0	146
michael@0	147	vpx_codec_err_t vpx_codec_register_put_frame_cb(vpx_codec_ctx_t *ctx,
michael@0	148	vpx_codec_put_frame_cb_fn_t cb,
michael@0	149	void *user_priv) {
michael@0	150	vpx_codec_err_t res;
michael@0	151
michael@0	152	if (!ctx || !cb)
michael@0	153	res = VPX_CODEC_INVALID_PARAM;
michael@0	154	else if (!ctx->iface || !ctx->priv
michael@0	155	|| !(ctx->iface->caps & VPX_CODEC_CAP_PUT_FRAME))
michael@0	156	res = VPX_CODEC_ERROR;
michael@0	157	else {
michael@0	158	ctx->priv->dec.put_frame_cb.u.put_frame = cb;
michael@0	159	ctx->priv->dec.put_frame_cb.user_priv = user_priv;
michael@0	160	res = VPX_CODEC_OK;
michael@0	161	}
michael@0	162
michael@0	163	return SAVE_STATUS(ctx, res);
michael@0	164	}
michael@0	165
michael@0	166
michael@0	167	vpx_codec_err_t vpx_codec_register_put_slice_cb(vpx_codec_ctx_t *ctx,
michael@0	168	vpx_codec_put_slice_cb_fn_t cb,
michael@0	169	void *user_priv) {
michael@0	170	vpx_codec_err_t res;
michael@0	171
michael@0	172	if (!ctx || !cb)
michael@0	173	res = VPX_CODEC_INVALID_PARAM;
michael@0	174	else if (!ctx->iface || !ctx->priv
michael@0	175	|| !(ctx->iface->caps & VPX_CODEC_CAP_PUT_FRAME))
michael@0	176	res = VPX_CODEC_ERROR;
michael@0	177	else {
michael@0	178	ctx->priv->dec.put_slice_cb.u.put_slice = cb;
michael@0	179	ctx->priv->dec.put_slice_cb.user_priv = user_priv;
michael@0	180	res = VPX_CODEC_OK;
michael@0	181	}
michael@0	182
michael@0	183	return SAVE_STATUS(ctx, res);
michael@0	184	}
michael@0	185
michael@0	186
michael@0	187	vpx_codec_err_t vpx_codec_get_mem_map(vpx_codec_ctx_t *ctx,
michael@0	188	vpx_codec_mmap_t *mmap,
michael@0	189	vpx_codec_iter_t *iter) {
michael@0	190	vpx_codec_err_t res = VPX_CODEC_OK;
michael@0	191
michael@0	192	if (!ctx || !mmap || !iter || !ctx->iface)
michael@0	193	res = VPX_CODEC_INVALID_PARAM;
michael@0	194	else if (!(ctx->iface->caps & VPX_CODEC_CAP_XMA))
michael@0	195	res = VPX_CODEC_ERROR;
michael@0	196	else
michael@0	197	res = ctx->iface->get_mmap(ctx, mmap, iter);
michael@0	198
michael@0	199	return SAVE_STATUS(ctx, res);
michael@0	200	}
michael@0	201
michael@0	202
michael@0	203	vpx_codec_err_t vpx_codec_set_mem_map(vpx_codec_ctx_t *ctx,
michael@0	204	vpx_codec_mmap_t *mmap,
michael@0	205	unsigned int num_maps) {
michael@0	206	vpx_codec_err_t res = VPX_CODEC_MEM_ERROR;
michael@0	207
michael@0	208	if (!ctx || !mmap || !ctx->iface)
michael@0	209	res = VPX_CODEC_INVALID_PARAM;
michael@0	210	else if (!(ctx->iface->caps & VPX_CODEC_CAP_XMA))
michael@0	211	res = VPX_CODEC_ERROR;
michael@0	212	else {
michael@0	213	unsigned int i;
michael@0	214
michael@0	215	for (i = 0; i < num_maps; i++, mmap++) {
michael@0	216	if (!mmap->base)
michael@0	217	break;
michael@0	218
michael@0	219	/* Everything look ok, set the mmap in the decoder */
michael@0	220	res = ctx->iface->set_mmap(ctx, mmap);
michael@0	221
michael@0	222	if (res)
michael@0	223	break;
michael@0	224	}
michael@0	225	}
michael@0	226
michael@0	227	return SAVE_STATUS(ctx, res);
michael@0	228	}