mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 15:22:09 +00:00
5b6cce2b73
This greatly improves the result when decoding typical (ST.2084) HDR content, since the job of tone mapping gets significantly easier when you're only mapping from 1000 to 250, rather than 10000 to 250. The difference is so drastic that we can now even reasonably use `hdr-tone-mapping=linear` and get a very perceptually uniform result that is only slightly darker than normal. (To compensate for the extra dynamic range) Due to weird implementation details, this only seems to be present on keyframes (or something like that), so we have to cache the last seen value for the frames in between. Also, in some files the metadata is just completely broken / nonsensical, so I decided to apply a simple heuristic to detect completely broken metadata.
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
#ifndef MPV_LAVC_H
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#define MPV_LAVC_H
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#include <stdbool.h>
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#include <libavcodec/avcodec.h>
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#include "demux/stheader.h"
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#include "video/mp_image.h"
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#include "video/hwdec.h"
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#define HWDEC_DELAY_QUEUE_COUNT 2
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typedef struct lavc_ctx {
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struct mp_log *log;
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struct MPOpts *opts;
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AVCodecContext *avctx;
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AVFrame *pic;
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struct vd_lavc_hwdec *hwdec;
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AVRational codec_timebase;
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enum AVPixelFormat pix_fmt;
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enum AVDiscard skip_frame;
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bool flushing;
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const char *decoder;
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bool hwdec_failed;
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bool hwdec_notified;
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// For HDR side-data caching
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double cached_hdr_peak;
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struct mp_image **delay_queue;
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int num_delay_queue;
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int max_delay_queue;
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// From VO
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struct mp_hwdec_devices *hwdec_devs;
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// For free use by hwdec implementation
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void *hwdec_priv;
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int hwdec_fmt;
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int hwdec_w;
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int hwdec_h;
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int hwdec_profile;
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bool hwdec_request_reinit;
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int hwdec_fail_count;
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} vd_ffmpeg_ctx;
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struct vd_lavc_hwdec {
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enum hwdec_type type;
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// If not-0: the IMGFMT_ format that should be accepted in the libavcodec
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// get_format callback.
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int image_format;
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// Always returns a non-hwaccel image format.
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bool copying;
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// Setting this will queue the given number of frames before calling
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// process_image() or returning them to the renderer. This can increase
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// efficiency by not blocking on the hardware pipeline by reading back
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// immediately after decoding.
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int delay_queue;
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int (*probe)(struct lavc_ctx *ctx, struct vd_lavc_hwdec *hwdec,
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const char *codec);
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int (*init)(struct lavc_ctx *ctx);
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int (*init_decoder)(struct lavc_ctx *ctx, int w, int h);
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void (*uninit)(struct lavc_ctx *ctx);
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// Note: if init_decoder is set, this will always use the values from the
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// last successful init_decoder call. Otherwise, it's up to you.
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struct mp_image *(*allocate_image)(struct lavc_ctx *ctx, int w, int h);
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// Process the image returned by the libavcodec decoder.
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struct mp_image *(*process_image)(struct lavc_ctx *ctx, struct mp_image *img);
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// For horrible Intel shit-drivers only
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void (*lock)(struct lavc_ctx *ctx);
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void (*unlock)(struct lavc_ctx *ctx);
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// Optional; if a special hardware decoder is needed (instead of "hwaccel").
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const char *(*get_codec)(struct lavc_ctx *ctx, const char *codec);
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// Suffix for libavcodec decoder. If non-NULL, get_codec() is overridden
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// with hwdec_find_decoder.
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// Intuitively, this will force the corresponding wrapper decoder.
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const char *lavc_suffix;
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};
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enum {
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HWDEC_ERR_NO_CTX = -2,
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HWDEC_ERR_NO_CODEC = -3,
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HWDEC_ERR_EMULATED = -4, // probing successful, but emulated API detected
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};
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struct hwdec_profile_entry {
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enum AVCodecID av_codec;
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int ff_profile;
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uint64_t hw_profile;
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};
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const struct hwdec_profile_entry *hwdec_find_profile(
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struct lavc_ctx *ctx, const struct hwdec_profile_entry *table);
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bool hwdec_check_codec_support(const char *codec,
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const struct hwdec_profile_entry *table);
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int hwdec_get_max_refs(struct lavc_ctx *ctx);
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const char *hwdec_find_decoder(const char *codec, const char *suffix);
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#endif
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