mirror of
https://github.com/mpv-player/mpv
synced 2024-12-20 22:02:59 +00:00
72aac9ae8a
Until now, failure to allocate image data resulted in a crash (i.e. abort() was called). This was intentional, because it's pretty silly to degrade playback, and in almost all situations, the OOM will probably kill you anyway. (And then there's the standard Linux overcommit behavior, which also will kill you at some point.) But I changed my opinion, so here we go. This change does not affect _all_ memory allocations, just image data. Now in most failure cases, the output will just be skipped. For video filters, this coincidentally means that failure is treated as EOF (because the playback core assumes EOF if nothing comes out of the video filter chain). In other situations, output might be in some way degraded, like skipping frames, not scaling OSD, and such. Functions whose return values changed semantics: mp_image_alloc mp_image_new_copy mp_image_new_ref mp_image_make_writeable mp_image_setrefp mp_image_to_av_frame_and_unref mp_image_from_av_frame mp_image_new_external_ref mp_image_new_custom_ref mp_image_pool_make_writeable mp_image_pool_get mp_image_pool_new_copy mp_vdpau_mixed_frame_create vf_alloc_out_image vf_make_out_image_writeable glGetWindowScreenshot
163 lines
6.3 KiB
C
163 lines
6.3 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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_ORDERED 0x01
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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_TOP 0x08
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#define MP_IMGFIELD_BOTTOM 0x10
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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 d_w, d_h; // define display 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_chroma_location chroma_location;
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// The image should be converted to these levels. Unlike colorlevels, it
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// does not describe the current state of the image. (Somewhat similar to
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// d_w/d_h vs. w/h.)
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enum mp_csp_levels outputlevels;
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// The image should be rotated clockwise (0-359 degrees).
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int rotate;
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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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unsigned int flags; // same as fmt.flags
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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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int chroma_x_shift; // horizontal
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int chroma_y_shift; // vertical
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int w,h; // visible dimensions
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uint8_t *planes[MP_MAX_PLANES];
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int stride[MP_MAX_PLANES];
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char * qscale;
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int qstride;
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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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int qscale_type; // 0->mpeg1/4/h263, 1->mpeg2
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/* redundant */
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int chroma_width;
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int chroma_height;
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int plane_w[MP_MAX_PLANES];
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int plane_h[MP_MAX_PLANES];
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/* only inside filter chain */
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double pts;
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/* memory management */
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struct m_refcount *refcount;
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/* for private use */
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void* priv;
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} mp_image_t;
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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_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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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_custom_ref(struct mp_image *img, void *arg,
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void (*free)(void *arg));
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struct mp_image *mp_image_new_external_ref(struct mp_image *img, void *arg,
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void (*ref)(void *arg),
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void (*unref)(void *arg),
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bool (*is_unique)(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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bool mp_image_params_equals(const struct mp_image_params *p1,
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const struct mp_image_params *p2);
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void mp_image_params_from_image(struct mp_image_params *params,
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const struct mp_image *image);
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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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#endif /* MPLAYER_MP_IMAGE_H */
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