Add common VA API data structures and helpers.

Originally committed as revision 18136 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 232 insertions, 0 deletions

diff --git a/libavcodec/vaapi.h b/libavcodec/vaapi.h
new file mode 100644
index 0000000000..d62066281e
--- /dev/null
+++ b/libavcodec/vaapi.h
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+/*
+ * Video Acceleration API (shared data between FFmpeg and the video player)
+ * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
+ *
+ * Copyright (C) 2008-2009 Splitted-Desktop Systems
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_VAAPI_H
+#define AVCODEC_VAAPI_H
+
+#include <stdint.h>
+
+/**
+ * \defgroup VAAPI_Decoding VA API Decoding
+ * \ingroup Decoder
+ * @{
+ */
+
+/**
+ * This structure is used to share data between the FFmpeg library and
+ * the client video application.
+ * This shall be zero-allocated and available as
+ * AVCodecContext.hwaccel_context. All user members can be set once
+ * during initialization or through each AVCodecContext.get_buffer()
+ * function call. In any case, they must be valid prior to calling
+ * decoding functions.
+ */
+struct vaapi_context {
+    /**
+     * Window system dependent data
+     *
+     * - encoding: unused
+     * - decoding: Set by user
+     */
+    void *display;
+
+    /**
+     * Configuration ID
+     *
+     * - encoding: unused
+     * - decoding: Set by user
+     */
+    uint32_t config_id;
+
+    /**
+     * Context ID (video decode pipeline)
+     *
+     * - encoding: unused
+     * - decoding: Set by user
+     */
+    uint32_t context_id;
+
+    /**
+     * VAPictureParameterBuffer ID
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    VABufferID pic_param_buf_id;
+
+    /**
+     * VAIQMatrixBuffer ID
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    VABufferID iq_matrix_buf_id;
+
+    /**
+     * VABitPlaneBuffer ID (for VC-1 decoding)
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    VABufferID bitplane_buf_id;
+
+    /**
+     * Slice parameter/data buffer IDs
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    VABufferID *slice_buf_ids;
+
+    /**
+     * Number of effective slice buffer IDs to send to the HW
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int n_slice_buf_ids;
+
+    /**
+     * Size of pre-allocated slice_buf_ids
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int slice_buf_ids_alloc;
+
+    /**
+     * Picture parameter buffer
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    union {
+        VAPictureParameterBufferMPEG2 mpeg2;
+        VAPictureParameterBufferMPEG4 mpeg4;
+        VAPictureParameterBufferH264  h264;
+        VAPictureParameterBufferVC1   vc1;
+    } pic_param;
+
+    /**
+     * Size of a VAPictureParameterBuffer element
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int pic_param_size;
+
+    /**
+     * Inverse quantization matrix buffer
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    union {
+        VAIQMatrixBufferMPEG2         mpeg2;
+        VAIQMatrixBufferMPEG4         mpeg4;
+        VAIQMatrixBufferH264          h264;
+    } iq_matrix;
+
+    /**
+     * Size of a VAIQMatrixBuffer element
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int iq_matrix_size;
+
+    /**
+     * Flag: is quantization matrix present?
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    uint8_t iq_matrix_present;
+
+    /**
+     * VC-1 bitplane buffer
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    uint8_t *bitplane_buffer;
+
+    /**
+     * Size of VC-1 bitplane buffer
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int bitplane_buffer_size;
+
+    /**
+     * Pointer to VASliceParameterBuffers
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    void *slice_params;
+
+    /**
+     * Size of a VASliceParameterBuffer element
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int slice_param_size;
+
+    /**
+     * Size of pre-allocated slice_params
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int slice_params_alloc;
+
+    /**
+     * Number of slices currently filled in
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    unsigned int slice_count;
+
+    /**
+     * Pointer to slice data buffer base
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    const uint8_t *slice_data;
+
+    /**
+     * Current size of slice data
+     *
+     * - encoding: unused
+     * - decoding: Set by libavcodec
+     */
+    uint32_t slice_data_size;
+};
+
+/* @} */
+
+#endif /* AVCODEC_VAAPI_H */