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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /media/libvpx/libvpx/vpx/vpx_decoder.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'media/libvpx/libvpx/vpx/vpx_decoder.h')
-rw-r--r-- | media/libvpx/libvpx/vpx/vpx_decoder.h | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vpx/vpx_decoder.h b/media/libvpx/libvpx/vpx/vpx_decoder.h new file mode 100644 index 0000000000..99dd8cf694 --- /dev/null +++ b/media/libvpx/libvpx/vpx/vpx_decoder.h @@ -0,0 +1,365 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ +#ifndef VPX_VPX_VPX_DECODER_H_ +#define VPX_VPX_VPX_DECODER_H_ + +/*!\defgroup decoder Decoder Algorithm Interface + * \ingroup codec + * This abstraction allows applications using this decoder to easily support + * multiple video formats with minimal code duplication. This section describes + * the interface common to all decoders. + * @{ + */ + +/*!\file + * \brief Describes the decoder algorithm interface to applications. + * + * This file describes the interface between an application and a + * video decoder algorithm. + * + */ +#ifdef __cplusplus +extern "C" { +#endif + +#include "./vpx_codec.h" +#include "./vpx_frame_buffer.h" + +/*!\brief Current ABI version number + * + * \internal + * If this file is altered in any way that changes the ABI, this value + * must be bumped. Examples include, but are not limited to, changing + * types, removing or reassigning enums, adding/removing/rearranging + * fields to structures + */ +#define VPX_DECODER_ABI_VERSION \ + (3 + VPX_CODEC_ABI_VERSION) /**<\hideinitializer*/ + +/*! \brief Decoder capabilities bitfield + * + * Each decoder advertises the capabilities it supports as part of its + * ::vpx_codec_iface_t interface structure. Capabilities are extra interfaces + * or functionality, and are not required to be supported by a decoder. + * + * The available flags are specified by VPX_CODEC_CAP_* defines. + */ +#define VPX_CODEC_CAP_PUT_SLICE 0x10000 /**< Will issue put_slice callbacks */ +#define VPX_CODEC_CAP_PUT_FRAME 0x20000 /**< Will issue put_frame callbacks */ +#define VPX_CODEC_CAP_POSTPROC 0x40000 /**< Can postprocess decoded frame */ +/*!\brief Can conceal errors due to packet loss */ +#define VPX_CODEC_CAP_ERROR_CONCEALMENT 0x80000 +/*!\brief Can receive encoded frames one fragment at a time */ +#define VPX_CODEC_CAP_INPUT_FRAGMENTS 0x100000 +/*!\brief Can support frame-based multi-threading */ +#define VPX_CODEC_CAP_FRAME_THREADING 0x200000 +/*!brief Can support external frame buffers */ +#define VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER 0x400000 + +/*! \brief Initialization-time Feature Enabling + * + * Certain codec features must be known at initialization time, to allow for + * proper memory allocation. + * + * The available flags are specified by VPX_CODEC_USE_* defines. + */ +#define VPX_CODEC_USE_POSTPROC 0x10000 /**< Postprocess decoded frame */ +/*!\brief Conceal errors in decoded frames */ +#define VPX_CODEC_USE_ERROR_CONCEALMENT 0x20000 +/*!\brief The input frame should be passed to the decoder one fragment at a + * time */ +#define VPX_CODEC_USE_INPUT_FRAGMENTS 0x40000 +/*!\brief Enable frame-based multi-threading */ +#define VPX_CODEC_USE_FRAME_THREADING 0x80000 + +/*!\brief Stream properties + * + * This structure is used to query or set properties of the decoded + * stream. Algorithms may extend this structure with data specific + * to their bitstream by setting the sz member appropriately. + */ +typedef struct vpx_codec_stream_info { + unsigned int sz; /**< Size of this structure */ + unsigned int w; /**< Width (or 0 for unknown/default) */ + unsigned int h; /**< Height (or 0 for unknown/default) */ + unsigned int is_kf; /**< Current frame is a keyframe */ +} vpx_codec_stream_info_t; + +/* REQUIRED FUNCTIONS + * + * The following functions are required to be implemented for all decoders. + * They represent the base case functionality expected of all decoders. + */ + +/*!\brief Initialization Configurations + * + * This structure is used to pass init time configuration options to the + * decoder. + */ +typedef struct vpx_codec_dec_cfg { + unsigned int threads; /**< Maximum number of threads to use, default 1 */ + unsigned int w; /**< Width */ + unsigned int h; /**< Height */ +} vpx_codec_dec_cfg_t; /**< alias for struct vpx_codec_dec_cfg */ + +/*!\brief Initialize a decoder instance + * + * Initializes a decoder context using the given interface. Applications + * should call the vpx_codec_dec_init convenience macro instead of this + * function directly, to ensure that the ABI version number parameter + * is properly initialized. + * + * If the library was configured with --disable-multithread, this call + * is not thread safe and should be guarded with a lock if being used + * in a multithreaded context. + * + * \param[in] ctx Pointer to this instance's context. + * \param[in] iface Pointer to the algorithm interface to use. + * \param[in] cfg Configuration to use, if known. May be NULL. + * \param[in] flags Bitfield of VPX_CODEC_USE_* flags + * \param[in] ver ABI version number. Must be set to + * VPX_DECODER_ABI_VERSION + * \retval #VPX_CODEC_OK + * The decoder algorithm has been initialized. + * \retval #VPX_CODEC_MEM_ERROR + * Memory allocation failed. + */ +vpx_codec_err_t vpx_codec_dec_init_ver(vpx_codec_ctx_t *ctx, + vpx_codec_iface_t *iface, + const vpx_codec_dec_cfg_t *cfg, + vpx_codec_flags_t flags, int ver); + +/*!\brief Convenience macro for vpx_codec_dec_init_ver() + * + * Ensures the ABI version parameter is properly set. + */ +#define vpx_codec_dec_init(ctx, iface, cfg, flags) \ + vpx_codec_dec_init_ver(ctx, iface, cfg, flags, VPX_DECODER_ABI_VERSION) + +/*!\brief Parse stream info from a buffer + * + * Performs high level parsing of the bitstream. Construction of a decoder + * context is not necessary. Can be used to determine if the bitstream is + * of the proper format, and to extract information from the stream. + * + * \param[in] iface Pointer to the algorithm interface + * \param[in] data Pointer to a block of data to parse + * \param[in] data_sz Size of the data buffer + * \param[in,out] si Pointer to stream info to update. The size member + * \ref MUST be properly initialized, but \ref MAY be + * clobbered by the algorithm. This parameter \ref MAY + * be NULL. + * + * \retval #VPX_CODEC_OK + * Bitstream is parsable and stream information updated + */ +vpx_codec_err_t vpx_codec_peek_stream_info(vpx_codec_iface_t *iface, + const uint8_t *data, + unsigned int data_sz, + vpx_codec_stream_info_t *si); + +/*!\brief Return information about the current stream. + * + * Returns information about the stream that has been parsed during decoding. + * + * \param[in] ctx Pointer to this instance's context + * \param[in,out] si Pointer to stream info to update. The size member + * \ref MUST be properly initialized, but \ref MAY be + * clobbered by the algorithm. This parameter \ref MAY + * be NULL. + * + * \retval #VPX_CODEC_OK + * Bitstream is parsable and stream information updated + */ +vpx_codec_err_t vpx_codec_get_stream_info(vpx_codec_ctx_t *ctx, + vpx_codec_stream_info_t *si); + +/*!\brief Decode data + * + * Processes a buffer of coded data. If the processing results in a new + * decoded frame becoming available, put_slice and put_frame callbacks may be + * invoked, as appropriate. Encoded data \ref MUST be passed in DTS (decode + * time stamp) order. Frames produced will always be in PTS (presentation + * time stamp) order. + * If the decoder is configured with VPX_CODEC_USE_INPUT_FRAGMENTS enabled, + * data and data_sz can contain a fragment of the encoded frame. Fragment + * \#n must contain at least partition \#n, but can also contain subsequent + * partitions (\#n+1 - \#n+i), and if so, fragments \#n+1, .., \#n+i must + * be empty. When no more data is available, this function should be called + * with NULL as data and 0 as data_sz. The memory passed to this function + * must be available until the frame has been decoded. + * + * \param[in] ctx Pointer to this instance's context + * \param[in] data Pointer to this block of new coded data. If + * NULL, the put_frame callback is invoked for + * the previously decoded frame. + * \param[in] data_sz Size of the coded data, in bytes. + * \param[in] user_priv Application specific data to associate with + * this frame. + * \param[in] deadline Soft deadline the decoder should attempt to meet, + * in us. Set to zero for unlimited. + * + * \return Returns #VPX_CODEC_OK if the coded data was processed completely + * and future pictures can be decoded without error. Otherwise, + * see the descriptions of the other error codes in ::vpx_codec_err_t + * for recoverability capabilities. + */ +vpx_codec_err_t vpx_codec_decode(vpx_codec_ctx_t *ctx, const uint8_t *data, + unsigned int data_sz, void *user_priv, + long deadline); + +/*!\brief Decoded frames iterator + * + * Iterates over a list of the frames available for display. The iterator + * storage should be initialized to NULL to start the iteration. Iteration is + * complete when this function returns NULL. + * + * The list of available frames becomes valid upon completion of the + * vpx_codec_decode call, and remains valid until the next call to + * vpx_codec_decode. + * + * \param[in] ctx Pointer to this instance's context + * \param[in,out] iter Iterator storage, initialized to NULL + * + * \return Returns a pointer to an image, if one is ready for display. Frames + * produced will always be in PTS (presentation time stamp) order. + */ +vpx_image_t *vpx_codec_get_frame(vpx_codec_ctx_t *ctx, vpx_codec_iter_t *iter); + +/*!\defgroup cap_put_frame Frame-Based Decoding Functions + * + * The following function is required to be implemented for all decoders + * that advertise the VPX_CODEC_CAP_PUT_FRAME capability. Calling this + * function for codecs that don't advertise this capability will result in + * an error code being returned, usually VPX_CODEC_INCAPABLE. + * @{ + */ + +/*!\brief put frame callback prototype + * + * This callback is invoked by the decoder to notify the application of + * the availability of decoded image data. + */ +typedef void (*vpx_codec_put_frame_cb_fn_t)(void *user_priv, + const vpx_image_t *img); + +/*!\brief Register for notification of frame completion. + * + * Registers a given function to be called when a decoded frame is + * available. + * + * \param[in] ctx Pointer to this instance's context + * \param[in] cb Pointer to the callback function + * \param[in] user_priv User's private data + * + * \retval #VPX_CODEC_OK + * Callback successfully registered. + * \retval #VPX_CODEC_ERROR + * Decoder context not initialized. + * \retval #VPX_CODEC_INCAPABLE + * Algorithm not capable of posting frame completion. + */ +vpx_codec_err_t vpx_codec_register_put_frame_cb(vpx_codec_ctx_t *ctx, + vpx_codec_put_frame_cb_fn_t cb, + void *user_priv); + +/*!@} - end defgroup cap_put_frame */ + +/*!\defgroup cap_put_slice Slice-Based Decoding Functions + * + * The following function is required to be implemented for all decoders + * that advertise the VPX_CODEC_CAP_PUT_SLICE capability. Calling this + * function for codecs that don't advertise this capability will result in + * an error code being returned, usually VPX_CODEC_INCAPABLE. + * @{ + */ + +/*!\brief put slice callback prototype + * + * This callback is invoked by the decoder to notify the application of + * the availability of partially decoded image data. + */ +typedef void (*vpx_codec_put_slice_cb_fn_t)(void *user_priv, + const vpx_image_t *img, + const vpx_image_rect_t *valid, + const vpx_image_rect_t *update); + +/*!\brief Register for notification of slice completion. + * + * Registers a given function to be called when a decoded slice is + * available. + * + * \param[in] ctx Pointer to this instance's context + * \param[in] cb Pointer to the callback function + * \param[in] user_priv User's private data + * + * \retval #VPX_CODEC_OK + * Callback successfully registered. + * \retval #VPX_CODEC_ERROR + * Decoder context not initialized. + * \retval #VPX_CODEC_INCAPABLE + * Algorithm not capable of posting slice completion. + */ +vpx_codec_err_t vpx_codec_register_put_slice_cb(vpx_codec_ctx_t *ctx, + vpx_codec_put_slice_cb_fn_t cb, + void *user_priv); + +/*!@} - end defgroup cap_put_slice*/ + +/*!\defgroup cap_external_frame_buffer External Frame Buffer Functions + * + * The following function is required to be implemented for all decoders + * that advertise the VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER capability. + * Calling this function for codecs that don't advertise this capability + * will result in an error code being returned, usually VPX_CODEC_INCAPABLE. + * + * \note + * Currently this only works with VP9. + * @{ + */ + +/*!\brief Pass in external frame buffers for the decoder to use. + * + * Registers functions to be called when libvpx needs a frame buffer + * to decode the current frame and a function to be called when libvpx does + * not internally reference the frame buffer. This set function must + * be called before the first call to decode or libvpx will assume the + * default behavior of allocating frame buffers internally. + * + * \param[in] ctx Pointer to this instance's context + * \param[in] cb_get Pointer to the get callback function + * \param[in] cb_release Pointer to the release callback function + * \param[in] cb_priv Callback's private data + * + * \retval #VPX_CODEC_OK + * External frame buffers will be used by libvpx. + * \retval #VPX_CODEC_INVALID_PARAM + * One or more of the callbacks were NULL. + * \retval #VPX_CODEC_ERROR + * Decoder context not initialized. + * \retval #VPX_CODEC_INCAPABLE + * Algorithm not capable of using external frame buffers. + * + * \note + * When decoding VP9, the application may be required to pass in at least + * #VP9_MAXIMUM_REF_BUFFERS + #VPX_MAXIMUM_WORK_BUFFERS external frame + * buffers. + */ +vpx_codec_err_t vpx_codec_set_frame_buffer_functions( + vpx_codec_ctx_t *ctx, vpx_get_frame_buffer_cb_fn_t cb_get, + vpx_release_frame_buffer_cb_fn_t cb_release, void *cb_priv); + +/*!@} - end defgroup cap_external_frame_buffer */ + +/*!@} - end defgroup decoder*/ +#ifdef __cplusplus +} +#endif +#endif // VPX_VPX_VPX_DECODER_H_ |