Data Structures | |
struct | vpx_codec_mmap |
Memory Map Entry. More... | |
Typedefs | |
typedef struct vpx_codec_mmap | vpx_codec_mmap_t |
Memory Map Entry. | |
Functions | |
vpx_codec_err_t | vpx_codec_get_mem_map (vpx_codec_ctx_t *ctx, vpx_codec_mmap_t *mmap, vpx_codec_iter_t *iter) |
Iterate over the list of segments to allocate. | |
vpx_codec_err_t | vpx_codec_set_mem_map (vpx_codec_ctx_t *ctx, vpx_codec_mmap_t *mmaps, unsigned int num_maps) |
Identify allocated segments to codec instance. |
typedef struct vpx_codec_mmap vpx_codec_mmap_t |
Memory Map Entry.
This structure is used to contain the properties of a memory segment. It is populated by the codec in the request phase, and by the calling application once the requested allocation has been performed. alias for struct vpx_codec_mmap
vpx_codec_err_t vpx_codec_get_mem_map | ( | vpx_codec_ctx_t * | ctx, | |
vpx_codec_mmap_t * | mmap, | |||
vpx_codec_iter_t * | iter | |||
) |
Iterate over the list of segments to allocate.
Iterates over a list of the segments to allocate. The iterator storage should be initialized to NULL to start the iteration. Iteration is complete when this function returns VPX_CODEC_LIST_END. The amount of memory needed to allocate is dependant upon the size of the encoded stream. In cases where the stream is not available at allocation time, a fixed size must be requested. The codec will not be able to operate on streams larger than the size used at allocation time.
[in] | ctx | Pointer to this instance's context. |
[out] | mmap | Pointer to the memory map entry to populate. |
[in,out] | iter | Iterator storage, initialized to NULL |
VPX_CODEC_OK | The memory map entry was populated. | |
VPX_CODEC_ERROR | Codec does not support XMA mode. | |
VPX_CODEC_MEM_ERROR | Unable to determine segment size from stream info. |
vpx_codec_err_t vpx_codec_set_mem_map | ( | vpx_codec_ctx_t * | ctx, | |
vpx_codec_mmap_t * | mmaps, | |||
unsigned int | num_maps | |||
) |
Identify allocated segments to codec instance.
Stores a list of allocated segments in the codec. Segments MUST be passed in the order they are read from vpx_codec_get_mem_map(), but may be passed in groups of any size. Segments MUST be set only once. The allocation function MUST ensure that the vpx_codec_mmap_t::base member is non-NULL. If the segment requires cleanup handling (eg, calling free() or close()) then the vpx_codec_mmap_t::dtor member MUST be populated.
[in] | ctx | Pointer to this instance's context. |
[in] | mmaps | Pointer to the first memory map entry in the list. |
[in] | num_maps | Number of entries being set at this time |
VPX_CODEC_OK | The segment was stored in the codec context. | |
VPX_CODEC_INCAPABLE | Codec does not support XMA mode. | |
VPX_CODEC_MEM_ERROR | Segment base address was not set, or segment was already stored. |