Detailed Description
The following functions are required to be implemented for all codecs that advertise the VPX_CODEC_CAP_XMA capability. Calling these functions for codecs that don't advertise this capability will result in an error code being returned, usually VPX_CODEC_INCAPABLE
Typedef Documentation
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
Function Documentation
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 dependent 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.
- Parameters:
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[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 |
- Return values:
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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 (e.g., calling free() or close()) then the vpx_codec_mmap_t::dtor member MUST be populated.
- Parameters:
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[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 |
- Return values:
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