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   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVCODEC_VAAPI_ENCODE_H
  20 #define AVCODEC_VAAPI_ENCODE_H
  21
  22 #include <stdint.h>
  23
  24 #include <va/va.h>
  25
  26 #include "libavutil/hwcontext.h"
  27 #include "libavutil/hwcontext_vaapi.h"
  28
  29 #include "avcodec.h"
  30
  31 struct VAAPIEncodeType;
  32 struct VAAPIEncodePicture;
  33
  34 enum {
  35     MAX_CONFIG_ATTRIBUTES  = 4,
  36     MAX_GLOBAL_PARAMS      = 4,
  37     MAX_PICTURE_REFERENCES = 2,
  38     MAX_PICTURE_SLICES     = 1,
  39     MAX_PARAM_BUFFERS      = 16,
  40     MAX_REORDER_DELAY      = 16,
  41     MAX_PARAM_BUFFER_SIZE  = 1024,
  42     MAX_OUTPUT_BUFFER_SIZE = 1024 * 1024,
  43 };
  44
  45 enum {
  46     PICTURE_TYPE_IDR = 0,
  47     PICTURE_TYPE_I   = 1,
  48     PICTURE_TYPE_P   = 2,
  49     PICTURE_TYPE_B   = 3,
  50 };
  51
  52 enum {
  53     // All encode operations are done independently.
  54     ISSUE_MODE_SERIALISE_EVERYTHING = 0,
  55     // Overlap as many operations as possible.
  56     ISSUE_MODE_MAXIMISE_THROUGHPUT,
  57     // Overlap operations only when satisfying parallel dependencies.
  58     ISSUE_MODE_MINIMISE_LATENCY,
  59 };
  60
  61 typedef struct VAAPIEncodeSlice {
  62     void           *priv_data;
  63     void           *codec_slice_params;
  64 } VAAPIEncodeSlice;
  65
  66 typedef struct VAAPIEncodePicture {
  67     struct VAAPIEncodePicture *next;
  68
  69     int64_t         display_order;
  70     int64_t         encode_order;
  71     int64_t         pts;
  72
  73     int             type;
  74     int             input_available;
  75     int             encode_issued;
  76     int             encode_complete;
  77
  78     AVFrame        *input_image;
  79     VASurfaceID     input_surface;
  80
  81     AVFrame        *recon_image;
  82     VASurfaceID     recon_surface;
  83
  84     int          nb_param_buffers;
  85     VABufferID      param_buffers[MAX_PARAM_BUFFERS];
  86
  87     VABufferID      output_buffer;
  88
  89     void           *priv_data;
  90     void           *codec_picture_params;
  91
  92     int          nb_refs;
  93     struct VAAPIEncodePicture *refs[MAX_PICTURE_REFERENCES];
  94
  95     int          nb_slices;
  96     VAAPIEncodeSlice *slices[MAX_PICTURE_SLICES];
  97 } VAAPIEncodePicture;
  98
  99 typedef struct VAAPIEncodeContext {
 100     const AVClass *class;
 101
 102     // Codec-specific hooks.
 103     const struct VAAPIEncodeType *codec;
 104
 105     // Codec-specific state.
 106     void *priv_data;
 107
 108     VAProfile       va_profile;
 109     VAEntrypoint    va_entrypoint;
 110     VAConfigID      va_config;
 111     VAContextID     va_context;
 112
 113     int             va_rc_mode;
 114
 115     AVBufferRef    *device_ref;
 116     AVHWDeviceContext *device;
 117     AVVAAPIDeviceContext *hwctx;
 118
 119     AVBufferRef    *input_frames_ref;
 120     AVHWFramesContext *input_frames;
 121
 122     // Input size, set from input frames.
 123     int             input_width;
 124     int             input_height;
 125     // Aligned size, set by codec init, becomes hwframe size.
 126     int             aligned_width;
 127     int             aligned_height;
 128
 129     int          nb_recon_frames;
 130     AVBufferRef    *recon_frames_ref;
 131     AVHWFramesContext *recon_frames;
 132
 133     VAConfigAttrib  config_attributes[MAX_CONFIG_ATTRIBUTES];
 134     int          nb_config_attributes;
 135
 136     VAEncMiscParameterBuffer *global_params[MAX_GLOBAL_PARAMS];
 137     size_t          global_params_size[MAX_GLOBAL_PARAMS];
 138     int          nb_global_params;
 139
 140     // Per-sequence parameter structure (VAEncSequenceParameterBuffer*).
 141     void           *codec_sequence_params;
 142
 143     // Per-sequence parameters found in the per-picture parameter
 144     // structure (VAEncPictureParameterBuffer*).
 145     void           *codec_picture_params;
 146
 147     // Current encoding window, in display (input) order.
 148     VAAPIEncodePicture *pic_start, *pic_end;
 149
 150     // Next input order index (display order).
 151     int64_t         input_order;
 152     // Number of frames that output is behind input.
 153     int64_t         output_delay;
 154     // Number of frames decode output will need to be delayed.
 155     int64_t         decode_delay;
 156     // Next output order index (encode order).
 157     int64_t         output_order;
 158
 159     int             issue_mode;
 160
 161     // Timestamp handling.
 162     int64_t         first_pts;
 163     int64_t         dts_pts_diff;
 164     int64_t         ts_ring[MAX_REORDER_DELAY * 3];
 165
 166     // Frame type decision.
 167     int i_per_idr;
 168     int p_per_i;
 169     int b_per_p;
 170     int idr_counter;
 171     int i_counter;
 172     int p_counter;
 173     int end_of_stream;
 174
 175     // Codec-local options are allocated to follow this structure in
 176     // memory (in the AVCodec definition, set priv_data_size to
 177     // sizeof(VAAPIEncodeContext) + sizeof(VAAPIEncodeFooOptions)).
 178     void *codec_options;
 179     char codec_options_data[0];
 180 } VAAPIEncodeContext;
 181
 182
 183 typedef struct VAAPIEncodeType {
 184     size_t    priv_data_size;
 185
 186     int  (*init)(AVCodecContext *avctx);
 187     int (*close)(AVCodecContext *avctx);
 188
 189     size_t sequence_params_size;
 190     size_t picture_params_size;
 191     size_t slice_params_size;
 192
 193     int  (*init_sequence_params)(AVCodecContext *avctx);
 194     int   (*init_picture_params)(AVCodecContext *avctx,
 195                                  VAAPIEncodePicture *pic);
 196     int     (*init_slice_params)(AVCodecContext *avctx,
 197                                  VAAPIEncodePicture *pic,
 198                                  VAAPIEncodeSlice *slice);
 199
 200     int sequence_header_type;
 201     int picture_header_type;
 202     int slice_header_type;
 203
 204     int (*write_sequence_header)(AVCodecContext *avctx,
 205                                  char *data, size_t *data_len);
 206     int  (*write_picture_header)(AVCodecContext *avctx,
 207                                  VAAPIEncodePicture *pic,
 208                                  char *data, size_t *data_len);
 209     int    (*write_slice_header)(AVCodecContext *avctx,
 210                                  VAAPIEncodePicture *pic,
 211                                  VAAPIEncodeSlice *slice,
 212                                  char *data, size_t *data_len);
 213
 214     int    (*write_extra_buffer)(AVCodecContext *avctx,
 215                                  VAAPIEncodePicture *pic,
 216                                  int index, int *type,
 217                                  char *data, size_t *data_len);
 218 } VAAPIEncodeType;
 219
 220
 221 int ff_vaapi_encode2(AVCodecContext *avctx, AVPacket *pkt,
 222                      const AVFrame *input_image, int *got_packet);
 223
 224 int ff_vaapi_encode_init(AVCodecContext *avctx,
 225                          const VAAPIEncodeType *type);
 226 int ff_vaapi_encode_close(AVCodecContext *avctx);
 227
 228 #endif /* AVCODEC_VAAPI_ENCODE_H */