blob: 6f9020b9fe0e29acb3fa4d1fe46e5a6242b0b8fd
| 1 | /* |
| 2 | * Copyright 2007 Bobby Bingham |
| 3 | * Copyright Stefano Sabatini <stefasab gmail com> |
| 4 | * Copyright Vitor Sessak <vitor1001 gmail com> |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include <string.h> |
| 24 | #include <stdio.h> |
| 25 | |
| 26 | #include "libavutil/avassert.h" |
| 27 | #include "libavutil/buffer.h" |
| 28 | #include "libavutil/hwcontext.h" |
| 29 | #include "libavutil/imgutils.h" |
| 30 | #include "libavutil/mem.h" |
| 31 | |
| 32 | #include "avfilter.h" |
| 33 | #include "internal.h" |
| 34 | #include "video.h" |
| 35 | |
| 36 | #define BUFFER_ALIGN 32 |
| 37 | |
| 38 | |
| 39 | AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h) |
| 40 | { |
| 41 | return ff_get_video_buffer(link->dst->outputs[0], w, h); |
| 42 | } |
| 43 | |
| 44 | AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h) |
| 45 | { |
| 46 | int pool_width = 0; |
| 47 | int pool_height = 0; |
| 48 | int pool_align = 0; |
| 49 | enum AVPixelFormat pool_format = AV_PIX_FMT_NONE; |
| 50 | |
| 51 | if (link->hw_frames_ctx && |
| 52 | ((AVHWFramesContext*)link->hw_frames_ctx->data)->format == link->format) { |
| 53 | int ret; |
| 54 | AVFrame *frame = av_frame_alloc(); |
| 55 | |
| 56 | if (!frame) |
| 57 | return NULL; |
| 58 | |
| 59 | ret = av_hwframe_get_buffer(link->hw_frames_ctx, frame, 0); |
| 60 | if (ret < 0) |
| 61 | av_frame_free(&frame); |
| 62 | |
| 63 | return frame; |
| 64 | } |
| 65 | |
| 66 | if (!link->frame_pool) { |
| 67 | link->frame_pool = ff_frame_pool_video_init(av_buffer_allocz, w, h, |
| 68 | link->format, BUFFER_ALIGN); |
| 69 | if (!link->frame_pool) |
| 70 | return NULL; |
| 71 | } else { |
| 72 | if (ff_frame_pool_get_video_config(link->frame_pool, |
| 73 | &pool_width, &pool_height, |
| 74 | &pool_format, &pool_align) < 0) { |
| 75 | return NULL; |
| 76 | } |
| 77 | |
| 78 | if (pool_width != w || pool_height != h || |
| 79 | pool_format != link->format || pool_align != BUFFER_ALIGN) { |
| 80 | |
| 81 | ff_frame_pool_uninit((FFFramePool **)&link->frame_pool); |
| 82 | link->frame_pool = ff_frame_pool_video_init(av_buffer_allocz, w, h, |
| 83 | link->format, BUFFER_ALIGN); |
| 84 | if (!link->frame_pool) |
| 85 | return NULL; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return ff_frame_pool_get(link->frame_pool); |
| 90 | } |
| 91 | |
| 92 | AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h) |
| 93 | { |
| 94 | AVFrame *ret = NULL; |
| 95 | |
| 96 | FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); |
| 97 | |
| 98 | if (link->dstpad->get_video_buffer) |
| 99 | ret = link->dstpad->get_video_buffer(link, w, h); |
| 100 | |
| 101 | if (!ret) |
| 102 | ret = ff_default_get_video_buffer(link, w, h); |
| 103 | |
| 104 | return ret; |
| 105 | } |
| 106 |