FFmpeg
vt_internal.h
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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_VT_INTERNAL_H
20 #define AVCODEC_VT_INTERNAL_H
21 
22 typedef struct VTContext {
23  // The current bitstream buffer.
24  uint8_t *bitstream;
25 
26  // The current size of the bitstream.
28 
29  // The reference size used for fast reallocation.
31 
32  // The core video buffer
33  CVImageBufferRef frame;
34 
35  // Current dummy frames context (depends on exact CVImageBufferRef params).
37 
38  // Non-NULL if the new hwaccel API is used. This is only a separate struct
39  // to ease compatibility with the old API.
41 
42  // Current H264 parameters (used to trigger decoder restart on SPS changes).
43  uint8_t sps[3];
45 } VTContext;
46 
50  const uint8_t *buffer,
51  uint32_t size);
53  const uint8_t *buffer,
54  uint32_t size);
57 
58 #endif /* AVCODEC_VT_INTERNAL_H */
ff_videotoolbox_uninit
int ff_videotoolbox_uninit(AVCodecContext *avctx)
Definition: videotoolbox.c:402
ff_videotoolbox_h264_start_frame
int ff_videotoolbox_h264_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: videotoolbox.c:330
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
AVVideotoolboxContext
This struct holds all the information that needs to be passed between the caller and libavcodec for i...
Definition: videotoolbox.h:46
ff_videotoolbox_h264_decode_slice
int ff_videotoolbox_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
Definition: videotoolbox.c:390
VTContext::allocated_size
int allocated_size
Definition: vt_internal.h:30
ff_videotoolbox_avcc_extradata_create
CFDataRef ff_videotoolbox_avcc_extradata_create(AVCodecContext *avctx)
Definition: videotoolbox.c:143
VTContext::bitstream
uint8_t * bitstream
Definition: vt_internal.h:24
ff_videotoolbox_alloc_frame
int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
Definition: videotoolbox.c:111
ff_videotoolbox_hvcc_extradata_create
CFDataRef ff_videotoolbox_hvcc_extradata_create(AVCodecContext *avctx)
Definition: videotoolbox.c:182
VTContext::bitstream_size
int bitstream_size
Definition: vt_internal.h:27
size
int size
Definition: twinvq_data.h:10344
VTContext
Definition: ffmpeg_videotoolbox.c:30
VTContext::frame
CVImageBufferRef frame
Definition: vt_internal.h:33
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AVCodecContext
main external API structure.
Definition: avcodec.h:383
VTContext::vt_ctx
struct AVVideotoolboxContext * vt_ctx
Definition: vt_internal.h:40
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
VTContext::cached_hw_frames_ctx
struct AVBufferRef * cached_hw_frames_ctx
Definition: vt_internal.h:36
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
VTContext::reconfig_needed
bool reconfig_needed
Definition: vt_internal.h:44
VTContext::sps
uint8_t sps[3]
Definition: vt_internal.h:43