| /* |
| * Copyright (c) 2010 The VP8 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. |
| */ |
| |
| |
| /*!\file decoder_impl.h |
| * \brief Describes the decoder algorithm interface for algorithm |
| * implementations. |
| * |
| * This file defines the private structures and data types that are |
| * only relevant to implementing an algorithm, as opposed to using |
| * it. |
| * |
| * To create a decoder algorithm class, an interface structure is put |
| * into the global namespace: |
| * <pre> |
| * my_codec.c: |
| * vpx_codec_iface_t my_codec = { |
| * "My Codec v1.0", |
| * VPX_CODEC_ALG_ABI_VERSION, |
| * ... |
| * }; |
| * </pre> |
| * |
| * An application instantiates a specific decoder instance by using |
| * vpx_codec_init() and a pointer to the algorithm's interface |
| * structure: |
| * <pre> |
| * my_app.c: |
| * extern vpx_codec_iface_t my_codec; |
| * { |
| * vpx_codec_ctx_t algo; |
| * res = vpx_codec_init(&algo, &my_codec); |
| * } |
| * </pre> |
| * |
| * Once initialized, the instance is manged using other functions |
| * from the vpx_codec_* family. |
| */ |
| #ifndef VPX_CODEC_INTERNAL_H |
| #define VPX_CODEC_INTERNAL_H |
| #include "vpx_decoder.h" |
| #include <stdarg.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_CODEC_INTERNAL_ABI_VERSION (3) |
| |
| typedef struct vpx_codec_alg_priv vpx_codec_alg_priv_t; |
| |
| /*!\brief init function pointer prototype |
| * |
| * Performs algorithm-specific initialization of the decoder context. |
| * This function is called by the generic vpx_codec_init() wrapper |
| * function, so plugins implementing this interface may trust the |
| * input parameters to be properly initialized. |
| * |
| * \param[in] ctx Pointer to this instance's context |
| * \retval #VPX_CODEC_OK |
| * The input stream was recognized and decoder initialized. |
| * \retval #VPX_CODEC_MEM_ERROR |
| * Memory operation failed. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_init_fn_t)(vpx_codec_ctx_t *ctx); |
| |
| /*!\brief destroy function pointer prototype |
| * |
| * Performs algorithm-specific destruction of the decoder context. |
| * This function is called by the generic vpx_codec_destroy() wrapper |
| * function, so plugins implementing this interface may trust the |
| * input parameters to be properly initialized. |
| * |
| * \param[in] ctx Pointer to this instance's context |
| * \retval #VPX_CODEC_OK |
| * The input stream was recognized and decoder initialized. |
| * \retval #VPX_CODEC_MEM_ERROR |
| * Memory operation failed. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_destroy_fn_t)( |
| vpx_codec_alg_priv_t *ctx); |
| |
| /*!\brief parse stream info function pointer prototype |
| * |
| * Performs high level parsing of the bitstream. This function is |
| * called by the generic vpx_codec_parse_stream() wrapper function, |
| * so plugins implementing this interface may trust the input |
| * parameters to be properly initialized. |
| * |
| * \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 |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_peek_si_fn_t)( |
| 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 |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_get_si_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| vpx_codec_stream_info_t *si); |
| |
| /*!\brief control function pointer prototype |
| * |
| * This function is used to exchange algorithm specific data with the |
| * decoder instance. This can be used to implement features specific |
| * to a particular algorithm. |
| * |
| * This function is called by the generic vpx_codec_control() wrapper |
| * function, so plugins implementing this interface may trust the |
| * input parameters to be properly initialized. However, this |
| * interface does not provide type safety for the exchanged data or |
| * assign meanings to the control codes. Those details should be |
| * specified in the algorithm's header file. In particular, the |
| * ctrl_id parameter is guaranteed to exist in the algorithm's |
| * control mapping table, and the data paramter may be NULL. |
| * |
| * |
| * \param[in] ctx Pointer to this instance's context |
| * \param[in] ctrl_id Algorithm specific control identifier |
| * \param[in,out] data Data to exchange with algorithm instance. |
| * |
| * \retval #VPX_CODEC_OK |
| * The internal state data was deserialized. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_control_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| int ctrl_id, |
| va_list ap); |
| |
| /*!\brief control function pointer mapping |
| * |
| * This structure stores the mapping between control identifiers and |
| * implementing functions. Each algorithm provides a list of these |
| * mappings. This list is searched by the vpx_codec_control() wrapper |
| * function to determine which function to invoke. The special |
| * value {0, NULL} is used to indicate end-of-list, and must be |
| * present. The special value {0, <non-null>} can be used as a |
| * catch-all mapping. This implies that ctrl_id values chosen by the |
| * algorithm \ref MUST be non-zero. |
| */ |
| typedef const struct |
| { |
| int ctrl_id; |
| vpx_codec_control_fn_t fn; |
| } vpx_codec_ctrl_fn_map_t; |
| |
| /*!\brief decode data function pointer prototype |
| * |
| * Processes a buffer of coded data. If the processing results in a |
| * new decoded frame becoming available, #VPX_CODEC_CB_PUT_SLICE and |
| * #VPX_CODEC_CB_PUT_FRAME events are generated as appropriate. This |
| * function is called by the generic vpx_codec_decode() wrapper |
| * function, so plugins implementing this interface may trust the |
| * input parameters to be properly initialized. |
| * |
| * \param[in] ctx Pointer to this instance's context |
| * \param[in] data Pointer to this block of new coded data. If |
| * NULL, a #VPX_CODEC_CB_PUT_FRAME event is |
| * posted for the previously decoded frame. |
| * \param[in] data_sz Size of the coded data, in bytes. |
| * |
| * \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. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_decode_fn_t)( |
| vpx_codec_alg_priv_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. |
| */ |
| typedef vpx_image_t*(*vpx_codec_get_frame_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| vpx_codec_iter_t *iter); |
| |
| |
| /*\brief e_xternal Memory Allocation memory map get iterator |
| * |
| * Iterates over a list of the memory maps requested by the decoder. |
| * The iterator storage should be initialized to NULL to start the |
| * iteration. Iteration is complete when this function returns NULL. |
| * |
| * \param[in out] iter Iterator storage, initialized to NULL |
| * |
| * \return Returns a pointer to an memory segment descriptor, or NULL |
| * to indicate end-of-list. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_get_mmap_fn_t)( |
| const vpx_codec_ctx_t *ctx, |
| vpx_codec_mmap_t *mmap, |
| vpx_codec_iter_t *iter); |
| |
| |
| /*\brief e_xternal Memory Allocation memory map set iterator |
| * |
| * Sets a memory descriptor inside the decoder instance. |
| * |
| * \param[in] ctx Pointer to this instance's context |
| * \param[in] mmap Memory map to store. |
| * |
| * \retval #VPX_CODEC_OK |
| * The memory map was accepted and stored. |
| * \retval #VPX_CODEC_MEM_ERROR |
| * The memory map was rejected. |
| */ |
| typedef vpx_codec_err_t (*vpx_codec_set_mmap_fn_t)( |
| vpx_codec_ctx_t *ctx, |
| const vpx_codec_mmap_t *mmap); |
| |
| |
| typedef vpx_codec_err_t (*vpx_codec_encode_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| const vpx_image_t *img, |
| vpx_codec_pts_t pts, |
| unsigned long duration, |
| vpx_enc_frame_flags_t flags, |
| unsigned long deadline); |
| typedef const vpx_codec_cx_pkt_t*(*vpx_codec_get_cx_data_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| vpx_codec_iter_t *iter); |
| |
| typedef vpx_codec_err_t |
| (*vpx_codec_enc_config_set_fn_t)( |
| vpx_codec_alg_priv_t *ctx, |
| const vpx_codec_enc_cfg_t *cfg); |
| typedef vpx_fixed_buf_t * |
| (*vpx_codec_get_global_headers_fn_t)(vpx_codec_alg_priv_t *ctx); |
| |
| typedef vpx_image_t * |
| (*vpx_codec_get_preview_frame_fn_t)(vpx_codec_alg_priv_t *ctx); |
| |
| /*!\brief usage configuration mapping |
| * |
| * This structure stores the mapping between usage identifiers and |
| * configuration structures. Each algorithm provides a list of these |
| * mappings. This list is searched by the |
| * vpx_codec_enc_config_default() wrapper function to determine which |
| * config to return. The special value {-1, {0}} is used to indicate |
| * end-of-list, and must be present. At least one mapping must be |
| * present, in addition to the end-of-list. |
| * |
| */ |
| typedef const struct |
| { |
| int usage; |
| vpx_codec_enc_cfg_t cfg; |
| } vpx_codec_enc_cfg_map_t; |
| |
| #define NOT_IMPLEMENTED 0 |
| |
| /*!\brief Decoder algorithm interface interface |
| * |
| * All decoders \ref MUST expose a variable of this type. |
| */ |
| struct vpx_codec_iface |
| { |
| const char *name; |
| int abi_version; |
| vpx_codec_caps_t caps; |
| vpx_codec_init_fn_t init; |
| vpx_codec_destroy_fn_t destroy; |
| vpx_codec_ctrl_fn_map_t *ctrl_maps; |
| vpx_codec_get_mmap_fn_t get_mmap; |
| vpx_codec_set_mmap_fn_t set_mmap; |
| struct |
| { |
| vpx_codec_peek_si_fn_t peek_si; |
| vpx_codec_get_si_fn_t get_si; |
| vpx_codec_decode_fn_t decode; |
| vpx_codec_get_frame_fn_t get_frame; |
| } dec; |
| struct |
| { |
| vpx_codec_enc_cfg_map_t *cfg_maps; |
| vpx_codec_encode_fn_t encode; |
| vpx_codec_get_cx_data_fn_t get_cx_data; |
| vpx_codec_enc_config_set_fn_t cfg_set; |
| vpx_codec_get_global_headers_fn_t get_glob_hdrs; |
| vpx_codec_get_preview_frame_fn_t get_preview; |
| } enc; |
| }; |
| |
| /*!\brief Callback function pointer / user data pair storage */ |
| typedef struct vpx_codec_priv_cb_pair |
| { |
| union |
| { |
| vpx_codec_put_frame_cb_fn_t put_frame; |
| vpx_codec_put_slice_cb_fn_t put_slice; |
| }; |
| void *user_priv; |
| } vpx_codec_priv_cb_pair_t; |
| |
| |
| /*!\brief Instance private storage |
| * |
| * This structure is allocated by the algorithm's init function. It |
| * can be extended in one of two ways. First, a second, algorithm |
| * specific structure can be allocated and the priv member pointed to |
| * it. Alternatively, this structure can be made the first member of |
| * the algorithm specific structure, and the pointer casted to the |
| * proper type. |
| */ |
| struct vpx_codec_priv |
| { |
| unsigned int sz; |
| vpx_codec_iface_t *iface; |
| struct vpx_codec_alg_priv *alg_priv; |
| const char *err_detail; |
| vpx_codec_flags_t init_flags; |
| struct |
| { |
| vpx_codec_priv_cb_pair_t put_frame_cb; |
| vpx_codec_priv_cb_pair_t put_slice_cb; |
| } dec; |
| struct |
| { |
| int tbd; |
| struct vpx_fixed_buf cx_data_dst_buf; |
| unsigned int cx_data_pad_before; |
| unsigned int cx_data_pad_after; |
| vpx_codec_cx_pkt_t cx_data_pkt; |
| } enc; |
| }; |
| |
| #undef VPX_CTRL_USE_TYPE |
| #define VPX_CTRL_USE_TYPE(id, typ) \ |
| static typ id##__value(va_list args) \ |
| {return va_arg(args, typ);} \ |
| static typ id##__convert(void *x)\ |
| {\ |
| union\ |
| {\ |
| void *x;\ |
| typ d;\ |
| } u;\ |
| u.x = x;\ |
| return u.d;\ |
| } |
| |
| |
| #undef VPX_CTRL_USE_TYPE_DEPRECATED |
| #define VPX_CTRL_USE_TYPE_DEPRECATED(id, typ) \ |
| static typ id##__value(va_list args) \ |
| {return va_arg(args, typ);} \ |
| static typ id##__convert(void *x)\ |
| {\ |
| union\ |
| {\ |
| void *x;\ |
| typ d;\ |
| } u;\ |
| u.x = x;\ |
| return u.d;\ |
| } |
| |
| #define CAST(id, arg) id##__value(arg) |
| #define RECAST(id, x) id##__convert(x) |
| |
| |
| /* Internal Utility Functions |
| * |
| * The following functions are indended to be used inside algorithms |
| * as utilities for manipulating vpx_codec_* data structures. |
| */ |
| struct vpx_codec_pkt_list |
| { |
| unsigned int cnt; |
| unsigned int max; |
| struct vpx_codec_cx_pkt pkts[1]; |
| }; |
| |
| #define vpx_codec_pkt_list_decl(n)\ |
| union {struct vpx_codec_pkt_list head;\ |
| struct {struct vpx_codec_pkt_list head;\ |
| struct vpx_codec_cx_pkt pkts[n];} alloc;} |
| |
| #define vpx_codec_pkt_list_init(m)\ |
| (m)->alloc.head.cnt = 0,\ |
| (m)->alloc.head.max = \ |
| sizeof((m)->alloc.pkts) / sizeof((m)->alloc.pkts[0]) |
| |
| int |
| vpx_codec_pkt_list_add(struct vpx_codec_pkt_list *, |
| const struct vpx_codec_cx_pkt *); |
| |
| const vpx_codec_cx_pkt_t* |
| vpx_codec_pkt_list_get(struct vpx_codec_pkt_list *list, |
| vpx_codec_iter_t *iter); |
| |
| |
| #include <stdio.h> |
| #include <setjmp.h> |
| struct vpx_internal_error_info |
| { |
| vpx_codec_err_t error_code; |
| int has_detail; |
| char detail[80]; |
| int setjmp; |
| jmp_buf jmp; |
| }; |
| |
| static void vpx_internal_error(struct vpx_internal_error_info *info, |
| vpx_codec_err_t error, |
| const char *fmt, |
| ...) |
| { |
| va_list ap; |
| |
| info->error_code = error; |
| info->has_detail = 0; |
| |
| if (fmt) |
| { |
| size_t sz = sizeof(info->detail); |
| |
| info->has_detail = 1; |
| va_start(ap, fmt); |
| vsnprintf(info->detail, sz - 1, fmt, ap); |
| va_end(ap); |
| info->detail[sz-1] = '\0'; |
| } |
| |
| if (info->setjmp) |
| longjmp(info->jmp, info->error_code); |
| } |
| #endif |
