mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
0a0bb9059f
MPlayer traditionally always used the display aspect ratio, e.g. 16:9, while FFmpeg uses the sample (aka pixel) aspect ratio. Both have a bunch of advantages and disadvantages. Actually, it seems using sample aspect ratio is generally nicer. The main reason for the change is making mpv closer to how FFmpeg works in order to make life easier. It's also nice that everything uses integer fractions instead of floats now (except --video-aspect option/property). Note that there is at least 1 user-visible change: vf_dsize now does not set the display size, only the display aspect ratio. This is because the image_params d_w/d_h fields did not just set the display aspect, but also the size (except in encoding mode).
166 lines
6.8 KiB
C
166 lines
6.8 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MPLAYER_MP_IMAGE_H
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#define MPLAYER_MP_IMAGE_H
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "csputils.h"
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#include "video/img_format.h"
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#define MP_PALETTE_SIZE (256 * 4)
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#define MP_IMGFIELD_TOP_FIRST 0x02
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#define MP_IMGFIELD_REPEAT_FIRST 0x04
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#define MP_IMGFIELD_INTERLACED 0x20
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// Describes image parameters that usually stay constant.
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// New fields can be added in the future. Code changing the parameters should
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// usually copy the whole struct, so that fields added later will be preserved.
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struct mp_image_params {
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enum mp_imgfmt imgfmt; // pixel format
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int w, h; // image dimensions
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int p_w, p_h; // define pixel aspect ratio (never 0/0)
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enum mp_csp colorspace;
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enum mp_csp_levels colorlevels;
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enum mp_csp_prim primaries;
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enum mp_csp_trc gamma;
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enum mp_chroma_location chroma_location;
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// The image should be rotated clockwise (0-359 degrees).
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int rotate;
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enum mp_stereo3d_mode stereo_in; // image is encoded with this mode
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enum mp_stereo3d_mode stereo_out; // should be displayed with this mode
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};
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/* Memory management:
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* - mp_image is a light-weight reference to the actual image data (pixels).
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* The actual image data is reference counted and can outlive mp_image
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* allocations. mp_image references can be created with mp_image_new_ref()
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* and free'd with talloc_free() (the helpers mp_image_setrefp() and
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* mp_image_unrefp() can also be used). The actual image data is free'd when
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* the last mp_image reference to it is free'd.
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* - Each mp_image has a clear owner. The owner can do anything with it, such
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* as changing mp_image fields. Instead of making ownership ambiguous by
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* sharing a mp_image reference, new references should be created.
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* - Write access to the actual image data is allowed only after calling
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* mp_image_make_writeable(), or if mp_image_is_writeable() returns true.
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* Conceptually, images can be changed by their owner only, and copy-on-write
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* is used to ensure that other references do not see any changes to the
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* image data. mp_image_make_writeable() will do that copy if required.
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*/
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typedef struct mp_image {
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int w, h; // visible dimensions (redundant with params.w/h)
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struct mp_image_params params;
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// fields redundant to params.imgfmt, for convenience or compatibility
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struct mp_imgfmt_desc fmt;
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enum mp_imgfmt imgfmt;
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int num_planes;
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uint8_t *planes[MP_MAX_PLANES];
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int stride[MP_MAX_PLANES];
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int pict_type; // 0->unknown, 1->I, 2->P, 3->B
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int fields;
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/* only inside filter chain */
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double pts;
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/* for private use */
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void* priv;
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// Reference-counted data references.
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// These do not necessarily map directly to planes[]. They can have
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// different order or count. There shouldn't be more buffers than planes.
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// If bufs[n] is NULL, bufs[n+1] must also be NULL.
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// All mp_* functions manage this automatically; do not mess with it.
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// (See also AVFrame.buf.)
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struct AVBufferRef *bufs[MP_MAX_PLANES];
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} mp_image_t;
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int mp_chroma_div_up(int size, int shift);
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struct mp_image *mp_image_alloc(int fmt, int w, int h);
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void mp_image_copy(struct mp_image *dmpi, struct mp_image *mpi);
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void mp_image_copy_gpu(struct mp_image *dst, struct mp_image *src);
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void mp_image_copy_attributes(struct mp_image *dmpi, struct mp_image *mpi);
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struct mp_image *mp_image_new_copy(struct mp_image *img);
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struct mp_image *mp_image_new_ref(struct mp_image *img);
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bool mp_image_is_writeable(struct mp_image *img);
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bool mp_image_make_writeable(struct mp_image *img);
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void mp_image_setrefp(struct mp_image **p_img, struct mp_image *new_value);
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void mp_image_unrefp(struct mp_image **p_img);
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void mp_image_clear(struct mp_image *mpi, int x0, int y0, int x1, int y1);
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void mp_image_crop(struct mp_image *img, int x0, int y0, int x1, int y1);
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void mp_image_crop_rc(struct mp_image *img, struct mp_rect rc);
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void mp_image_vflip(struct mp_image *img);
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void mp_image_set_size(struct mp_image *mpi, int w, int h);
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int mp_image_plane_w(struct mp_image *mpi, int plane);
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int mp_image_plane_h(struct mp_image *mpi, int plane);
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void mp_image_setfmt(mp_image_t* mpi, int out_fmt);
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void mp_image_steal_data(struct mp_image *dst, struct mp_image *src);
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struct mp_image *mp_image_new_dummy_ref(struct mp_image *img);
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struct mp_image *mp_image_new_custom_ref(struct mp_image *img, void *arg,
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void (*free)(void *arg));
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void mp_image_params_guess_csp(struct mp_image_params *params);
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char *mp_image_params_to_str_buf(char *b, size_t bs,
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const struct mp_image_params *p);
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#define mp_image_params_to_str(p) mp_image_params_to_str_buf((char[80]){0}, 80, p)
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bool mp_image_params_valid(const struct mp_image_params *p);
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bool mp_image_params_equal(const struct mp_image_params *p1,
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const struct mp_image_params *p2);
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void mp_image_params_get_dsize(const struct mp_image_params *p,
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int *d_w, int *d_h);
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void mp_image_params_set_dsize(struct mp_image_params *p, int d_w, int d_h);
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void mp_image_set_params(struct mp_image *image,
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const struct mp_image_params *params);
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void mp_image_set_attributes(struct mp_image *image,
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const struct mp_image_params *params);
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struct AVFrame;
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void mp_image_copy_fields_from_av_frame(struct mp_image *dst,
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struct AVFrame *src);
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void mp_image_copy_fields_to_av_frame(struct AVFrame *dst,
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struct mp_image *src);
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struct mp_image *mp_image_from_av_frame(struct AVFrame *av_frame);
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struct AVFrame *mp_image_to_av_frame_and_unref(struct mp_image *img);
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void memcpy_pic(void *dst, const void *src, int bytesPerLine, int height,
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int dstStride, int srcStride);
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void memset_pic(void *dst, int fill, int bytesPerLine, int height, int stride);
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void memset16_pic(void *dst, int fill, int unitsPerLine, int height, int stride);
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void mp_check_gpu_memcpy(struct mp_log *log, bool *once);
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#endif /* MPLAYER_MP_IMAGE_H */
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