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   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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_PICTURE_REFERENCES = 2,
  36     MAX_PICTURE_SLICES     = 1,
  37     MAX_PARAM_BUFFERS      = 16,
  38     MAX_REORDER_DELAY      = 16,
  39     MAX_PARAM_BUFFER_SIZE  = 1024,
  40     MAX_OUTPUT_BUFFER_SIZE = 1024 * 1024,
  41 };
  42
  43 enum {
  44     PICTURE_TYPE_IDR = 0,
  45     PICTURE_TYPE_I   = 1,
  46     PICTURE_TYPE_P   = 2,
  47     PICTURE_TYPE_B   = 3,
  48 };
  49
  50 enum {
  51     // All encode operations are done independently.
  52     ISSUE_MODE_SERIALISE_EVERYTHING = 0,
  53     // Overlap as many operations as possible.
  54     ISSUE_MODE_MAXIMISE_THROUGHPUT,
  55     // Overlap operations only when satisfying parallel dependencies.
  56     ISSUE_MODE_MINIMISE_LATENCY,
  57 };
  58
  59 typedef struct VAAPIEncodeSlice {
  60     void           *priv_data;
  61     void           *codec_slice_params;
  62 } VAAPIEncodeSlice;
  63
  64 typedef struct VAAPIEncodePicture {
  65     struct VAAPIEncodePicture *next;
  66
  67     int64_t         display_order;
  68     int64_t         encode_order;
  69     int64_t         pts;
  70
  71     int             type;
  72     int             input_available;
  73     int             encode_issued;
  74     int             encode_complete;
  75
  76     AVFrame        *input_image;
  77     VASurfaceID     input_surface;
  78
  79     AVFrame        *recon_image;
  80     VASurfaceID     recon_surface;
  81
  82     int          nb_param_buffers;
  83     VABufferID      param_buffers[MAX_PARAM_BUFFERS];
  84
  85     VABufferID      output_buffer;
  86
  87     void           *priv_data;
  88     void           *codec_picture_params;
  89
  90     int          nb_refs;
  91     struct VAAPIEncodePicture *refs[MAX_PICTURE_REFERENCES];
  92
  93     int          nb_slices;
  94     VAAPIEncodeSlice *slices[MAX_PICTURE_SLICES];
  95 } VAAPIEncodePicture;
  96
  97 typedef struct VAAPIEncodeContext {
  98     const AVClass *class;
  99
 100     // Codec-specific hooks.
 101     const struct VAAPIEncodeType *codec;
 102
 103     // Codec-specific state.
 104     void *priv_data;
 105
 106     VAProfile       va_profile;
 107     VAEntrypoint    va_entrypoint;
 108     VAConfigID      va_config;
 109     VAContextID     va_context;
 110
 111     int             va_rc_mode;
 112
 113     AVBufferRef    *device_ref;
 114     AVHWDeviceContext *device;
 115     AVVAAPIDeviceContext *hwctx;
 116
 117     AVBufferRef    *input_frames_ref;
 118     AVHWFramesContext *input_frames;
 119
 120     // Input size, set from input frames.
 121     int             input_width;
 122     int             input_height;
 123     // Aligned size, set by codec init, becomes hwframe size.
 124     int             aligned_width;
 125     int             aligned_height;
 126
 127     int          nb_recon_frames;
 128     AVBufferRef    *recon_frames_ref;
 129     AVHWFramesContext *recon_frames;
 130
 131     VAConfigAttrib *config_attributes;
 132     int          nb_config_attributes;
 133
 134     // Per-sequence parameter structure (VAEncSequenceParameterBuffer*).
 135     void           *codec_sequence_params;
 136
 137     // Per-sequence parameters found in the per-picture parameter
 138     // structure (VAEncPictureParameterBuffer*).
 139     void *codec_picture_params;
 140
 141     // Current encoding window, in display (input) order.
 142     VAAPIEncodePicture *pic_start, *pic_end;
 143
 144     // Next input order index (display order).
 145     int64_t         input_order;
 146     // Number of frames that output is behind input.
 147     int64_t         output_delay;
 148     // Number of frames decode output will need to be delayed.
 149     int64_t         decode_delay;
 150     // Next output order index (encode order).
 151     int64_t         output_order;
 152
 153     int             issue_mode;
 154
 155     // Timestamp handling.
 156     int64_t         first_pts;
 157     int64_t         dts_pts_diff;
 158     int64_t         ts_ring[MAX_REORDER_DELAY * 3];
 159
 160     // Frame type decision.
 161     int i_per_idr;
 162     int p_per_i;
 163     int b_per_p;
 164     int idr_counter;
 165     int i_counter;
 166     int p_counter;
 167     int end_of_stream;
 168
 169 } VAAPIEncodeContext;
 170
 171
 172 typedef struct VAAPIEncodeType {
 173     size_t    priv_data_size;
 174
 175     int  (*init)(AVCodecContext *avctx);
 176     int (*close)(AVCodecContext *avctx);
 177
 178     size_t sequence_params_size;
 179     size_t picture_params_size;
 180     size_t slice_params_size;
 181
 182     int  (*init_sequence_params)(AVCodecContext *avctx);
 183     int   (*init_picture_params)(AVCodecContext *avctx,
 184                                  VAAPIEncodePicture *pic);
 185     int     (*init_slice_params)(AVCodecContext *avctx,
 186                                  VAAPIEncodePicture *pic,
 187                                  VAAPIEncodeSlice *slice);
 188
 189     int sequence_header_type;
 190     int picture_header_type;
 191     int slice_header_type;
 192
 193     int (*write_sequence_header)(AVCodecContext *avctx,
 194                                  char *data, size_t *data_len);
 195     int  (*write_picture_header)(AVCodecContext *avctx,
 196                                  VAAPIEncodePicture *pic,
 197                                  char *data, size_t *data_len);
 198     int    (*write_slice_header)(AVCodecContext *avctx,
 199                                  VAAPIEncodePicture *pic,
 200                                  VAAPIEncodeSlice *slice,
 201                                  char *data, size_t *data_len);
 202
 203     int    (*write_extra_buffer)(AVCodecContext *avctx,
 204                                  VAAPIEncodePicture *pic,
 205                                  int index, int *type,
 206                                  char *data, size_t *data_len);
 207 } VAAPIEncodeType;
 208
 209
 210 int ff_vaapi_encode2(AVCodecContext *avctx, AVPacket *pkt,
 211                      const AVFrame *input_image, int *got_packet);
 212
 213 int ff_vaapi_encode_init(AVCodecContext *avctx,
 214                          const VAAPIEncodeType *type);
 215 int ff_vaapi_encode_close(AVCodecContext *avctx);
 216
 217 #endif /* AVCODEC_VAAPI_ENCODE_H */