rocm-systems/api/rocjpeg.h

/* Copyright (c) 2024 - 2025 Advanced Micro Devices, Inc. All rights reserved.

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#ifndef ROC_JPEG_H
#define ROC_JPEG_H

#define ROCJPEGAPI

#pragma once
#include "hip/hip_runtime.h"
#include "rocjpeg_version.h"

/**
 * @file rocjpeg.h
 * @brief The AMD rocJPEG Library.
 * @defgroup group_amd_rocjepg rocJPEG: AMD ROCm JPEG Decode API
 * @brief rocJPEG API is a toolkit to decode JPEG images using a hardware-accelerated JPEG decoder on AMD’s GPUs.
*/

#if defined(__cplusplus)
extern "C" {
#endif // __cplusplus
/**
 * @def
 * @ingroup group_amd_rocjpeg
 * Maximum number of channels rocJPEG supports
*/
#define ROCJPEG_MAX_COMPONENT 4

/**
 * @enum RocJpegStatus
 * @ingroup group_amd_rocjpeg
 * @brief Enumeration representing the status codes for the rocJPEG library.
 */
typedef enum {
    ROCJPEG_STATUS_SUCCESS = 0, /**< The operation completed successfully. */
    ROCJPEG_STATUS_NOT_INITIALIZED = -1, /**< The rocJPEG library is not initialized. */
    ROCJPEG_STATUS_INVALID_PARAMETER = -2, /**< An invalid parameter was passed to a function. */
    ROCJPEG_STATUS_BAD_JPEG = -3, /**< The input JPEG data is corrupted or invalid. */
    ROCJPEG_STATUS_JPEG_NOT_SUPPORTED = -4, /**< The JPEG format is not supported. */
    ROCJPEG_STATUS_OUTOF_MEMORY = -5, /**< Out of memory error. */
    ROCJPEG_STATUS_EXECUTION_FAILED = -6, /**< The execution of a function failed. */
    ROCJPEG_STATUS_ARCH_MISMATCH = -7, /**< The architecture is not supported. */
    ROCJPEG_STATUS_INTERNAL_ERROR = -8, /**< Internal error occurred. */
    ROCJPEG_STATUS_IMPLEMENTATION_NOT_SUPPORTED = -9, /**< The requested implementation is not supported. */
    ROCJPEG_STATUS_HW_JPEG_DECODER_NOT_SUPPORTED = -10, /**< Hardware JPEG decoder is not supported. */
    ROCJPEG_STATUS_RUNTIME_ERROR = -11, /**< Runtime error occurred. */
    ROCJPEG_STATUS_NOT_IMPLEMENTED = -12, /**< The requested feature is not implemented. */
} RocJpegStatus;

/**
 * @enum RocJpegChromaSubsampling
 * @ingroup group_amd_rocjpeg
 * @brief Enum representing the chroma subsampling options for JPEG encoding/decoding.
 *
 * The `RocJpegChromaSubsampling` enum defines the available chroma subsampling options for JPEG encoding/decoding.
 * Chroma subsampling refers to the reduction of color information in an image to reduce file size.
 *
 * The possible values are:
 * - `ROCJPEG_CSS_444`: Full chroma resolution (4:4:4).
 * - `ROCJPEG_CSS_440`: Chroma resolution reduced by half vertically (4:4:0).
 * - `ROCJPEG_CSS_422`: Chroma resolution reduced by half horizontally (4:2:2).
 * - `ROCJPEG_CSS_420`: Chroma resolution reduced by half both horizontally and vertically (4:2:0).
 * - `ROCJPEG_CSS_411`: Chroma resolution reduced by a quarter horizontally (4:1:1).
 * - `ROCJPEG_CSS_400`: No chroma information (4:0:0).
 * - `ROCJPEG_CSS_UNKNOWN`: Unknown chroma subsampling.
 */
typedef enum {
    ROCJPEG_CSS_444 = 0,
    ROCJPEG_CSS_440 = 1,
    ROCJPEG_CSS_422 = 2,
    ROCJPEG_CSS_420 = 3,
    ROCJPEG_CSS_411 = 4,
    ROCJPEG_CSS_400 = 5,
    ROCJPEG_CSS_UNKNOWN = -1
} RocJpegChromaSubsampling;

/**
 * @struct RocJpegImage
 * @ingroup group_amd_rocjpeg
 * @brief Structure representing a JPEG image.
 *
 * This structure holds the information about a JPEG image, including the pointers to the image channels
 * and the pitch (stride) of each channel.
 */
typedef struct {
    uint8_t* channel[ROCJPEG_MAX_COMPONENT]; /**< Pointers to the image channels. */
    uint32_t pitch[ROCJPEG_MAX_COMPONENT]; /**< Pitch (stride) of each channel. */
} RocJpegImage;

/**
 * @enum RocJpegOutputFormat
 * @ingroup group_amd_rocjpeg
 * @brief Enum representing the output format options for the RocJpegImage.
 *
 * The `RocJpegOutputFormat` enum specifies the different output formats that can be used when decoding a JPEG image using the VCN JPEG decoder.
 *
 * The available output formats are:
 * - `ROCJPEG_OUTPUT_NATIVE`: Returns the native unchanged decoded YUV image from the VCN JPEG decoder. The channel arrangement depends on the chroma subsampling format.
 * - `ROCJPEG_OUTPUT_YUV_PLANAR`: Extracts the Y, U, and V channels from the decoded YUV image and writes them into separate channels of the RocJpegImage.
 * - `ROCJPEG_OUTPUT_Y`: Returns only the luma component (Y) and writes it to the first channel of the RocJpegImage.
 * - `ROCJPEG_OUTPUT_RGB`: Converts the decoded image to interleaved RGB format using the VCN JPEG decoder or HIP kernels and writes it to the first channel of the RocJpegImage.
 * - `ROCJPEG_OUTPUT_RGB_PLANAR`: Converts the decoded image to RGB PLANAR format using the VCN JPEG decoder or HIP kernels and writes the RGB channels to separate channels of the RocJpegImage.
 * - `ROCJPEG_OUTPUT_FORMAT_MAX`: Maximum allowed value for the output format.
 */
typedef enum {
    /**< return native unchanged decoded YUV image from the VCN JPEG decoder.
         For ROCJPEG_CSS_444 and ROCJPEG_CSS_440 write Y, U, and V to first, second, and third channels of RocJpegImage
         For ROCJPEG_CSS_422 write YUYV (packed) to first channel of RocJpegImage
         For ROCJPEG_CSS_420 write Y to first channel and UV (interleaved) to second channel of RocJpegImage
         For ROCJPEG_CSS_400 write Y to first channel of RocJpegImage */
    ROCJPEG_OUTPUT_NATIVE = 0,
    /**< extract Y, U, and V channels from the decoded YUV image from the VCN JPEG decoder and write into first, second, and third channel of RocJpegImage.
         For ROCJPEG_CSS_400 write Y to first channel of RocJpegImage */
    ROCJPEG_OUTPUT_YUV_PLANAR = 1,
    /**< return luma component (Y) and write to first channel of RocJpegImage */
    ROCJPEG_OUTPUT_Y = 2,
    /**< convert to interleaved RGB using VCN JPEG decoder (on MI300+) or using HIP kernels and write to first channel of RocJpegImage */
    ROCJPEG_OUTPUT_RGB = 3,
    /**< convert to RGB PLANAR using VCN JPEG decoder (on MI300+) or HIP kernels and write to first, second, and third channel of RocJpegImage. */
    ROCJPEG_OUTPUT_RGB_PLANAR = 4,
    ROCJPEG_OUTPUT_FORMAT_MAX = 5 /**< maximum allowed value */
} RocJpegOutputFormat;

/**
 * @struct RocJpegDecodeParams
 * @ingroup group_amd_rocjpeg
 * @brief Structure containing parameters for JPEG decoding.
 *
 * This structure defines the parameters for decoding a JPEG image using the rocJpeg library.
 * It specifies the output format, crop rectangle, and target dimensions for the decoded image.
 * Note that if both the crop rectangle and target dimensions are defined, cropping is done first,
 * followed by resizing the resulting ROI to the target dimension.
 */
typedef struct {
    RocJpegOutputFormat output_format; /**< Output data format. See RocJpegOutputFormat for description. */
    struct {
        int16_t left; /**< Left coordinate of the crop rectangle. */
        int16_t top; /**< Top coordinate of the crop rectangle. */
        int16_t right; /**< Right coordinate of the crop rectangle. */
        int16_t bottom; /**< Bottom coordinate of the crop rectangle. */
    } crop_rectangle; /**< Defines the region of interest (ROI) to be copied into the RocJpegImage output buffers. */
    struct {
        uint32_t width; /**< Target width of the picture to be resized. */
        uint32_t height; /**< Target height of the picture to be resized. */
    } target_dimension; /**< (future use) Defines the target width and height of the picture to be resized. Both should be even.
                            If specified, allocate the RocJpegImage buffers based on these dimensions. */
} RocJpegDecodeParams;

/**
 * @enum RocJpegBackend
 * @ingroup group_amd_rocjpeg
 * @brief The backend options for the rocJpeg library.
 *
 * This enum defines the available backend options for the rocJpeg library.
 * The backend can be either hardware or hybrid.
 */
typedef enum {
    ROCJPEG_BACKEND_HARDWARE = 0, /**< Hardware backend option. */
    ROCJPEG_BACKEND_HYBRID = 1    /**< Hybrid backend option. */
} RocJpegBackend;

/**
 * @brief A handle representing a RocJpegStream instance.
 *
 * The `RocJpegStreamHandle` is a pointer type used to represent a RocJpegStream instance.
 * It is used as a handle to parse and store various parameters from a JPEG stream.
 */
typedef void* RocJpegStreamHandle;

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegStreamCreate(RocJpegStreamHandle *jpeg_stream_handle);
 * @ingroup group_amd_rocjpeg
 * @brief Creates a RocJpegStreamHandle for JPEG stream processing.
 *
 * This function creates a RocJpegStreamHandle, which is used for processing JPEG streams.
 * The created handle is stored in the `jpeg_stream_handle` parameter.
 *
 * @param jpeg_stream_handle Pointer to a RocJpegStreamHandle variable that will hold the created handle.
 * @return RocJpegStatus Returns the status of the operation. Possible values are:
 *                      - ROCJPEG_STATUS_SUCCESS: The operation was successful.
 *                      - ROCJPEG_STATUS_INVALID_ARGUMENT: The `jpeg_stream_handle` parameter is NULL.
 *                      - ROCJPEG_STATUS_OUT_OF_MEMORY: Failed to allocate memory for the handle.
 *                      - ROCJPEG_STATUS_UNKNOWN_ERROR: An unknown error occurred.
 */
RocJpegStatus ROCJPEGAPI rocJpegStreamCreate(RocJpegStreamHandle *jpeg_stream_handle);

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegStreamParse(const unsigned char *data, size_t length, RocJpegStreamHandle jpeg_stream_handle);
 * @ingroup group_amd_rocjpeg
 * @brief Parses a JPEG stream.
 *
 * This function parses a JPEG stream represented by the `data` parameter of length `length`.
 * The parsed stream is associated with the `jpeg_stream_handle` provided.
 *
 * @param data The pointer to the JPEG stream data.
 * @param length The length of the JPEG stream data.
 * @param jpeg_stream_handle The handle to the JPEG stream.
 * @return The status of the JPEG stream parsing operation.
 */
RocJpegStatus ROCJPEGAPI rocJpegStreamParse(const unsigned char *data, size_t length, RocJpegStreamHandle jpeg_stream_handle);

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegStreamDestroy(RocJpegStreamHandle jpeg_stream_handle);
 * @ingroup group_amd_rocjpeg
 * @brief Destroys a RocJpegStreamHandle object and releases associated resources.
 *
 * This function destroys the RocJpegStreamHandle object specified by `jpeg_stream_handle` and releases any resources
 * associated with it. After calling this function, the `jpeg_stream_handle` becomes invalid and should not be used
 * anymore.
 *
 * @param jpeg_stream_handle The handle to the RocJpegStreamHandle object to be destroyed.
 * @return The status of the operation. Returns ROCJPEG_STATUS_SUCCESS if the operation is successful, or an error code
 *         if an error occurs.
 */
RocJpegStatus ROCJPEGAPI rocJpegStreamDestroy(RocJpegStreamHandle jpeg_stream_handle);

/**
 * @brief A handle representing a RocJpeg instance.
 *
 * The `RocJpegHandle` is a pointer type used to represent a RocJpeg instance.
 * It is used as a handle to perform various operations on the rocJpeg library.
 */
typedef void *RocJpegHandle;

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegCreate(RocJpegBackend backend, int device_id, RocJpegHandle *handle);
 * @ingroup group_amd_rocjpeg
 * @brief Creates a RocJpegHandle for JPEG decoding.
 *
 * This function creates a RocJpegHandle for JPEG decoding using the specified backend and device ID.
 *
 * @param backend The backend to be used for JPEG decoding.
 * @param device_id The ID of the device to be used for JPEG decoding.
 * @param handle Pointer to a RocJpegHandle variable to store the created handle.
 * @return The status of the operation. Returns ROCJPEG_STATUS_INVALID_PARAMETER if handle is nullptr,
 *         ROCJPEG_STATUS_NOT_INITIALIZED if the rocJPEG handle initialization fails, or the status
 *         returned by the InitializeDecoder function of the rocjpeg_decoder.
 */
RocJpegStatus ROCJPEGAPI rocJpegCreate(RocJpegBackend backend, int device_id, RocJpegHandle *handle);

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegDestroy(RocJpegHandle handle);
 * @ingroup group_amd_rocjpeg
 * @brief Destroys a RocJpegHandle object.
 *
 * This function destroys the RocJpegHandle object pointed to by the given handle.
 * It releases any resources associated with the handle and frees the memory.
 *
 * @param handle The handle to the RocJpegHandle object to be destroyed.
 * @return The status of the operation. Returns ROCJPEG_STATUS_SUCCESS if the handle was successfully destroyed,
 *         or ROCJPEG_STATUS_INVALID_PARAMETER if the handle is nullptr.
 */

RocJpegStatus ROCJPEGAPI rocJpegDestroy(RocJpegHandle handle);

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegGetImageInfo(RocJpegHandle handle, RocJpegStreamHandle jpeg_stream_handle, uint8_t *num_components, RocJpegChromaSubsampling *subsampling, uint32_t *widths, uint32_t *heights);
 * @ingroup group_amd_rocjpeg
 * @brief Retrieves information about the JPEG image.
 *
 * This function retrieves the number of components, chroma subsampling, and dimensions (width and height) of the JPEG image
 * specified by the `jpeg_stream_handle`. The information is stored in the provided output parameters `num_components`,
 * `subsampling`, `widths`, and `heights`.
 *
 * @param handle The handle to the RocJpegDecoder instance.
 * @param jpeg_stream_handle The handle to the RocJpegStream instance representing the JPEG image.
 * @param num_components A pointer to an unsigned 8-bit integer that will store the number of components in the JPEG image.
 * @param subsampling A pointer to a RocJpegChromaSubsampling enum that will store the chroma subsampling information.
 * @param widths A pointer to an unsigned 32-bit integer array that will store the width of each component in the JPEG image.
 * @param heights A pointer to an unsigned 32-bit integer array that will store the height of each component in the JPEG image.
 *
 * @return The RocJpegStatus indicating the success or failure of the operation.
 *         - ROCJPEG_STATUS_SUCCESS: The operation was successful.
 *         - ROCJPEG_STATUS_INVALID_PARAMETER: One or more input parameters are invalid.
 *         - ROCJPEG_STATUS_RUNTIME_ERROR: An exception occurred during the operation.
 */
RocJpegStatus ROCJPEGAPI rocJpegGetImageInfo(RocJpegHandle handle, RocJpegStreamHandle jpeg_stream_handle, uint8_t *num_components, RocJpegChromaSubsampling *subsampling, uint32_t *widths, uint32_t *heights);

/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegDecode(RocJpegHandle handle, RocJpegStreamHandle jpeg_stream_handle, const RocJpegDecodeParams *decode_params, RocJpegImage *destination);
 * @ingroup group_amd_rocjpeg
 * @brief Decodes a JPEG image using the rocJPEG library.
 *
 * This function decodes a JPEG image using the rocJPEG library. It takes a rocJpegHandle, a rocJpegStreamHandle,
 * a pointer to RocJpegDecodeParams, and a pointer to RocJpegImage as input parameters. The function returns a
 * RocJpegStatus indicating the success or failure of the decoding operation.
 *
 * @param handle The rocJpegHandle representing the rocJPEG decoder instance.
 * @param jpeg_stream_handle The rocJpegStreamHandle representing the input JPEG stream.
 * @param decode_params A pointer to RocJpegDecodeParams containing the decoding parameters.
 * @param destination A pointer to RocJpegImage where the decoded image will be stored.
 * @return A RocJpegStatus indicating the success or failure of the decoding operation.
 */

RocJpegStatus ROCJPEGAPI rocJpegDecode(RocJpegHandle handle, RocJpegStreamHandle jpeg_stream_handle, const RocJpegDecodeParams *decode_params, RocJpegImage *destination);


/**
 * @fn RocJpegStatus ROCJPEGAPI rocJpegDecodeBatched(RocJpegHandle handle, RocJpegStreamHandle *jpeg_stream_handles, int batch_size, const RocJpegDecodeParams *decode_params, RocJpegImage *destinations);
 * @ingroup group_amd_rocjpeg
 * @brief Decodes a batch of JPEG images using the rocJPEG library.
 *
 * Decodes a batch of JPEG images using the rocJPEG library.
 *
 * @param handle The rocJPEG handle.
 * @param jpeg_stream_handles An array of rocJPEG stream handles representing the input JPEG streams.
 * @param batch_size The number of JPEG streams in the batch.
 * @param decode_params The decode parameters for the JPEG decoding process.
 * @param destinations An array of rocJPEG images representing the output decoded images.
 * @return The status of the JPEG decoding operation.
 */
RocJpegStatus ROCJPEGAPI rocJpegDecodeBatched(RocJpegHandle handle, RocJpegStreamHandle *jpeg_stream_handles, int batch_size, const RocJpegDecodeParams *decode_params, RocJpegImage *destinations);

/**
 * @fn extern const char* ROCDECAPI rocJpegGetErrorName(RocJpegStatus rocjpeg_status);
 * @ingroup group_amd_rocjpeg
 * @brief Retrieves the name of the error associated with the given RocJpegStatus.
 *
 * This function returns a string representation of the error associated with the given RocJpegStatus.
 *
 * @param rocjpeg_status The RocJpegStatus for which to retrieve the error name.
 * @return A pointer to a constant character string representing the error name.
 */
extern const char* ROCJPEGAPI rocJpegGetErrorName(RocJpegStatus rocjpeg_status);

#if defined(__cplusplus)
  }
#endif

#endif // ROC_JPEG_H