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_VT_INTERNAL_H
20#define AVCODEC_VT_INTERNAL_H
21
22#include "avcodec.h"
23#include "videotoolbox.h"
24
25typedef struct VTContext {
26    // The current bitstream buffer.
27    uint8_t                     *bitstream;
28
29    // The current size of the bitstream.
30    int                         bitstream_size;
31
32    // The reference size used for fast reallocation.
33    int                         allocated_size;
34
35    // The core video buffer
36    CVImageBufferRef            frame;
37
38    // Current dummy frames context (depends on exact CVImageBufferRef params).
39    struct AVBufferRef         *cached_hw_frames_ctx;
40
41    // Non-NULL if the new hwaccel API is used. This is only a separate struct
42    // to ease compatibility with the old API.
43    struct AVVideotoolboxContext *vt_ctx;
44
45    // Current H264 parameters (used to trigger decoder restart on SPS changes).
46    uint8_t                     sps[3];
47    bool                        reconfig_needed;
48
49    void *logctx;
50} VTContext;
51
52int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame);
53int ff_videotoolbox_common_init(AVCodecContext *avctx);
54int ff_videotoolbox_frame_params(AVCodecContext *avctx,
55                                 AVBufferRef *hw_frames_ctx);
56int ff_videotoolbox_buffer_copy(VTContext *vtctx,
57                                const uint8_t *buffer,
58                                uint32_t size);
59int ff_videotoolbox_uninit(AVCodecContext *avctx);
60int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx,
61                                     const uint8_t *buffer,
62                                     uint32_t size);
63int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx,
64                                      const uint8_t *buffer,
65                                      uint32_t size);
66int ff_videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame);
67CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx);
68CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx);
69CFDataRef ff_videotoolbox_vpcc_extradata_create(AVCodecContext *avctx);
70
71#endif /* AVCODEC_VT_INTERNAL_H */
72