On Wed, 6 Sep 2017 16:53:04 +0100
Mark Thompson <s...@jkqxz.net> wrote:
> On 06/09/17 15:37, wm4 wrote:
> > On Tue, 5 Sep 2017 23:59:31 +0100
> > Mark Thompson <s...@jkqxz.net> wrote:
> >
> >> ---
> >> doc/APIchanges | 3 +++
> >> libavcodec/avcodec.h | 23 +++++++++++++++++++++++
> >> 2 files changed, 26 insertions(+)
> >>
> >> diff --git a/doc/APIchanges b/doc/APIchanges
> >> index 6f70f3c96..f21dc4db0 100644
> >> --- a/doc/APIchanges
> >> +++ b/doc/APIchanges
> >> @@ -14,6 +14,9 @@ libavutil: 2017-03-23
> >> API changes, most recent first:
> >>
> >> 2017-xx-xx - xxxxxxx - lavc 58.x+1.0 - avcodec.h
> >> + Add AVCodecHWConfig and AVCodec.hw_configs.
> >> +
> >> +2017-xx-xx - xxxxxxx - lavc 58.x+1.0 - avcodec.h
> >> Add AV_HWACCEL_FLAG_REUSE_CONTEXT.
> >>
> >> 2017-xx-xx - xxxxxxx - lavfi 7.x+1.0 - avfilter.h
> >> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> >> index 89e432d16..4f6b76203 100644
> >> --- a/libavcodec/avcodec.h
> >> +++ b/libavcodec/avcodec.h
> >> @@ -35,6 +35,7 @@
> >> #include "libavutil/cpu.h"
> >> #include "libavutil/dict.h"
> >> #include "libavutil/frame.h"
> >> +#include "libavutil/hwcontext.h"
> >> #include "libavutil/log.h"
> >> #include "libavutil/pixfmt.h"
> >> #include "libavutil/rational.h"
> >> @@ -2773,6 +2774,19 @@ typedef struct AVProfile {
> >> const char *name; ///< short name for the profile
> >> } AVProfile;
> >>
> >> +typedef struct AVCodecHWConfig {
> >> + /**
> >> + * A device type which can be supplied to the codec.
> >> + */
> >> + enum AVHWDeviceType device_type;
> >> + /**
> >> + * The matching hardware pixel format which the codec can produce.
> >> + *
> >> + * Set to AV_PIX_FMT_NONE if no hardware pixel format is available.
> >> + */
> >> + enum AVPixelFormat pix_fmt;
> >> +} AVCodecHWConfig;
> >> +
> >> typedef struct AVCodecDefault AVCodecDefault;
> >>
> >> struct AVSubtitle;
> >> @@ -2808,6 +2822,15 @@ typedef struct AVCodec {
> >> const AVClass *priv_class; ///< AVClass for the private
> >> context
> >> const AVProfile *profiles; ///< array of recognized
> >> profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
> >>
> >> + /**
> >> + * Array of hardware configurations supported by the codec, or NULL
> >> + * if no hardware supported.
> >> + *
> >> + * The array is terminated by a configuration with a device_type of
> >> + * AV_HW_DEVICE_TYPE_NONE.
> >> + */
> >> + const AVCodecHWConfig *hw_configs;
> >> +
> >> /*****************************************************************
> >> * No fields below this line are part of the public API. They
> >> * may not be used outside of libavcodec and can be changed and
> >
> > What if a decoder provides hardware decoding, but has no associated
> > AVHWDeviceType? (Such as mmal.)
>
> They are in the pix_fmts list. What other information do you want?
They don't necessarily output a hw format. For example, crystalhd
(ffmpeg only) doesn't. It would also not be very uniform.
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