blob: 44750973a60e07d21085e25b51334768d599df89
| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include "dualinput.h" |
| 20 | #include "libavutil/timestamp.h" |
| 21 | |
| 22 | static int process_frame(FFFrameSync *fs) |
| 23 | { |
| 24 | AVFilterContext *ctx = fs->parent; |
| 25 | FFDualInputContext *s = fs->opaque; |
| 26 | AVFrame *mainpic = NULL, *secondpic = NULL; |
| 27 | int ret = 0; |
| 28 | |
| 29 | if ((ret = ff_framesync_get_frame(&s->fs, 0, &mainpic, 1)) < 0 || |
| 30 | (ret = ff_framesync_get_frame(&s->fs, 1, &secondpic, 0)) < 0) { |
| 31 | av_frame_free(&mainpic); |
| 32 | return ret; |
| 33 | } |
| 34 | av_assert0(mainpic); |
| 35 | mainpic->pts = av_rescale_q(s->fs.pts, s->fs.time_base, ctx->outputs[0]->time_base); |
| 36 | if (secondpic && !ctx->is_disabled) |
| 37 | mainpic = s->process(ctx, mainpic, secondpic); |
| 38 | ret = ff_filter_frame(ctx->outputs[0], mainpic); |
| 39 | av_assert1(ret != AVERROR(EAGAIN)); |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s) |
| 44 | { |
| 45 | FFFrameSyncIn *in; |
| 46 | int ret; |
| 47 | |
| 48 | if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0) |
| 49 | return ret; |
| 50 | |
| 51 | in = s->fs.in; |
| 52 | s->fs.opaque = s; |
| 53 | s->fs.on_event = process_frame; |
| 54 | in[0].time_base = ctx->inputs[0]->time_base; |
| 55 | in[1].time_base = ctx->inputs[1]->time_base; |
| 56 | in[0].sync = 2; |
| 57 | in[0].before = EXT_STOP; |
| 58 | in[0].after = EXT_INFINITY; |
| 59 | in[1].sync = 1; |
| 60 | in[1].before = EXT_NULL; |
| 61 | in[1].after = EXT_INFINITY; |
| 62 | |
| 63 | if (s->shortest) |
| 64 | in[0].after = in[1].after = EXT_STOP; |
| 65 | if (!s->repeatlast) { |
| 66 | in[1].after = EXT_NULL; |
| 67 | in[1].sync = 0; |
| 68 | } |
| 69 | if (s->skip_initial_unpaired) { |
| 70 | in[1].before = EXT_STOP; |
| 71 | } |
| 72 | |
| 73 | return ff_framesync_configure(&s->fs); |
| 74 | } |
| 75 | |
| 76 | int ff_dualinput_filter_frame(FFDualInputContext *s, |
| 77 | AVFilterLink *inlink, AVFrame *in) |
| 78 | { |
| 79 | return ff_framesync_filter_frame(&s->fs, inlink, in); |
| 80 | } |
| 81 | |
| 82 | int ff_dualinput_request_frame(FFDualInputContext *s, AVFilterLink *outlink) |
| 83 | { |
| 84 | return ff_framesync_request_frame(&s->fs, outlink); |
| 85 | } |
| 86 | |
| 87 | void ff_dualinput_uninit(FFDualInputContext *s) |
| 88 | { |
| 89 | ff_framesync_uninit(&s->fs); |
| 90 | } |
| 91 |