X-Git-Url: http://47.100.26.94:8080/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjni%2Finclude%2Flibavutil%2Fbuffer.h;fp=app%2Fsrc%2Fmain%2Fjni%2Finclude%2Flibavutil%2Fbuffer.h;h=0000000000000000000000000000000000000000;hb=577426ccc66649228285c4a0b6ba8752836059c6;hp=b4399fd39ff5a86313534ef5e0c60ff8832189ce;hpb=b7202442677d0cf41e6e59870cd6c34e5619b8b9;p=rtmpclient.git diff --git a/app/src/main/jni/include/libavutil/buffer.h b/app/src/main/jni/include/libavutil/buffer.h deleted file mode 100644 index b4399fd..0000000 --- a/app/src/main/jni/include/libavutil/buffer.h +++ /dev/null @@ -1,274 +0,0 @@ -/* - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * @ingroup lavu_buffer - * refcounted data buffer API - */ - -#ifndef AVUTIL_BUFFER_H -#define AVUTIL_BUFFER_H - -#include - -/** - * @defgroup lavu_buffer AVBuffer - * @ingroup lavu_data - * - * @{ - * AVBuffer is an API for reference-counted data buffers. - * - * There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer - * represents the data buffer itself; it is opaque and not meant to be accessed - * by the caller directly, but only through AVBufferRef. However, the caller may - * e.g. compare two AVBuffer pointers to check whether two different references - * are describing the same data buffer. AVBufferRef represents a single - * reference to an AVBuffer and it is the object that may be manipulated by the - * caller directly. - * - * There are two functions provided for creating a new AVBuffer with a single - * reference -- av_buffer_alloc() to just allocate a new buffer, and - * av_buffer_create() to wrap an existing array in an AVBuffer. From an existing - * reference, additional references may be created with av_buffer_ref(). - * Use av_buffer_unref() to free a reference (this will automatically free the - * data once all the references are freed). - * - * The convention throughout this API and the rest of FFmpeg is such that the - * buffer is considered writable if there exists only one reference to it (and - * it has not been marked as read-only). The av_buffer_is_writable() function is - * provided to check whether this is true and av_buffer_make_writable() will - * automatically create a new writable buffer when necessary. - * Of course nothing prevents the calling code from violating this convention, - * however that is safe only when all the existing references are under its - * control. - * - * @note Referencing and unreferencing the buffers is thread-safe and thus - * may be done from multiple threads simultaneously without any need for - * additional locking. - * - * @note Two different references to the same buffer can point to different - * parts of the buffer (i.e. their AVBufferRef.data will not be equal). - */ - -/** - * A reference counted buffer type. It is opaque and is meant to be used through - * references (AVBufferRef). - */ -typedef struct AVBuffer AVBuffer; - -/** - * A reference to a data buffer. - * - * The size of this struct is not a part of the public ABI and it is not meant - * to be allocated directly. - */ -typedef struct AVBufferRef { - AVBuffer *buffer; - - /** - * The data buffer. It is considered writable if and only if - * this is the only reference to the buffer, in which case - * av_buffer_is_writable() returns 1. - */ - uint8_t *data; - /** - * Size of data in bytes. - */ - int size; -} AVBufferRef; - -/** - * Allocate an AVBuffer of the given size using av_malloc(). - * - * @return an AVBufferRef of given size or NULL when out of memory - */ -AVBufferRef *av_buffer_alloc(int size); - -/** - * Same as av_buffer_alloc(), except the returned buffer will be initialized - * to zero. - */ -AVBufferRef *av_buffer_allocz(int size); - -/** - * Always treat the buffer as read-only, even when it has only one - * reference. - */ -#define AV_BUFFER_FLAG_READONLY (1 << 0) - -/** - * Create an AVBuffer from an existing array. - * - * If this function is successful, data is owned by the AVBuffer. The caller may - * only access data through the returned AVBufferRef and references derived from - * it. - * If this function fails, data is left untouched. - * @param data data array - * @param size size of data in bytes - * @param free a callback for freeing this buffer's data - * @param opaque parameter to be got for processing or passed to free - * @param flags a combination of AV_BUFFER_FLAG_* - * - * @return an AVBufferRef referring to data on success, NULL on failure. - */ -AVBufferRef *av_buffer_create(uint8_t *data, int size, - void (*free)(void *opaque, uint8_t *data), - void *opaque, int flags); - -/** - * Default free callback, which calls av_free() on the buffer data. - * This function is meant to be passed to av_buffer_create(), not called - * directly. - */ -void av_buffer_default_free(void *opaque, uint8_t *data); - -/** - * Create a new reference to an AVBuffer. - * - * @return a new AVBufferRef referring to the same AVBuffer as buf or NULL on - * failure. - */ -AVBufferRef *av_buffer_ref(AVBufferRef *buf); - -/** - * Free a given reference and automatically free the buffer if there are no more - * references to it. - * - * @param buf the reference to be freed. The pointer is set to NULL on return. - */ -void av_buffer_unref(AVBufferRef **buf); - -/** - * @return 1 if the caller may write to the data referred to by buf (which is - * true if and only if buf is the only reference to the underlying AVBuffer). - * Return 0 otherwise. - * A positive answer is valid until av_buffer_ref() is called on buf. - */ -int av_buffer_is_writable(const AVBufferRef *buf); - -/** - * @return the opaque parameter set by av_buffer_create. - */ -void *av_buffer_get_opaque(const AVBufferRef *buf); - -int av_buffer_get_ref_count(const AVBufferRef *buf); - -/** - * Create a writable reference from a given buffer reference, avoiding data copy - * if possible. - * - * @param buf buffer reference to make writable. On success, buf is either left - * untouched, or it is unreferenced and a new writable AVBufferRef is - * written in its place. On failure, buf is left untouched. - * @return 0 on success, a negative AVERROR on failure. - */ -int av_buffer_make_writable(AVBufferRef **buf); - -/** - * Reallocate a given buffer. - * - * @param buf a buffer reference to reallocate. On success, buf will be - * unreferenced and a new reference with the required size will be - * written in its place. On failure buf will be left untouched. *buf - * may be NULL, then a new buffer is allocated. - * @param size required new buffer size. - * @return 0 on success, a negative AVERROR on failure. - * - * @note the buffer is actually reallocated with av_realloc() only if it was - * initially allocated through av_buffer_realloc(NULL) and there is only one - * reference to it (i.e. the one passed to this function). In all other cases - * a new buffer is allocated and the data is copied. - */ -int av_buffer_realloc(AVBufferRef **buf, int size); - -/** - * @} - */ - -/** - * @defgroup lavu_bufferpool AVBufferPool - * @ingroup lavu_data - * - * @{ - * AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers. - * - * Frequently allocating and freeing large buffers may be slow. AVBufferPool is - * meant to solve this in cases when the caller needs a set of buffers of the - * same size (the most obvious use case being buffers for raw video or audio - * frames). - * - * At the beginning, the user must call av_buffer_pool_init() to create the - * buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to - * get a reference to a new buffer, similar to av_buffer_alloc(). This new - * reference works in all aspects the same way as the one created by - * av_buffer_alloc(). However, when the last reference to this buffer is - * unreferenced, it is returned to the pool instead of being freed and will be - * reused for subsequent av_buffer_pool_get() calls. - * - * When the caller is done with the pool and no longer needs to allocate any new - * buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable. - * Once all the buffers are released, it will automatically be freed. - * - * Allocating and releasing buffers with this API is thread-safe as long as - * either the default alloc callback is used, or the user-supplied one is - * thread-safe. - */ - -/** - * The buffer pool. This structure is opaque and not meant to be accessed - * directly. It is allocated with av_buffer_pool_init() and freed with - * av_buffer_pool_uninit(). - */ -typedef struct AVBufferPool AVBufferPool; - -/** - * Allocate and initialize a buffer pool. - * - * @param size size of each buffer in this pool - * @param alloc a function that will be used to allocate new buffers when the - * pool is empty. May be NULL, then the default allocator will be used - * (av_buffer_alloc()). - * @return newly created buffer pool on success, NULL on error. - */ -AVBufferPool *av_buffer_pool_init(int size, AVBufferRef* (*alloc)(int size)); - -/** - * Mark the pool as being available for freeing. It will actually be freed only - * once all the allocated buffers associated with the pool are released. Thus it - * is safe to call this function while some of the allocated buffers are still - * in use. - * - * @param pool pointer to the pool to be freed. It will be set to NULL. - * @see av_buffer_pool_can_uninit() - */ -void av_buffer_pool_uninit(AVBufferPool **pool); - -/** - * Allocate a new AVBuffer, reusing an old buffer from the pool when available. - * This function may be called simultaneously from multiple threads. - * - * @return a reference to the new buffer on success, NULL on error. - */ -AVBufferRef *av_buffer_pool_get(AVBufferPool *pool); - -/** - * @} - */ - -#endif /* AVUTIL_BUFFER_H */