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/* |
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* Copyright (c) 2022 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/avassert.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/parseutils.h" |
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#include "avfilter.h" |
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#include "filters.h" |
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#include "formats.h" |
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#include "audio.h" |
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#include "video.h" |
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#include "internal.h" |
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typedef struct Audio3dScopeContext { |
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const AVClass *class; |
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int w, h; |
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int size; |
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float fov; |
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float roll; |
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float pitch; |
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float yaw; |
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float zoom[3]; |
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float eye[3]; |
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AVRational frame_rate; |
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int nb_samples; |
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float view_matrix[4][4]; |
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float projection_matrix[4][4]; |
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AVFrame *frames[60]; |
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} Audio3dScopeContext; |
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#define OFFSET(x) offsetof(Audio3dScopeContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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#define TFLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
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static const AVOption a3dscope_options[] = { |
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, |
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, |
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS }, |
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS }, |
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{ "fov", "set camera FoV", OFFSET(fov), AV_OPT_TYPE_FLOAT, {.dbl=90.f}, 40, 150, TFLAGS }, |
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{ "roll", "set camera roll",OFFSET(roll), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180, 180, TFLAGS }, |
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{ "pitch","set camera pitch",OFFSET(pitch), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180, 180, TFLAGS }, |
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{ "yaw", "set camera yaw", OFFSET(yaw), AV_OPT_TYPE_FLOAT, {.dbl=0.f}, -180, 180, TFLAGS }, |
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{ "xzoom","set camera zoom", OFFSET(zoom[0]),AV_OPT_TYPE_FLOAT, {.dbl=1.f}, 0.01, 10, TFLAGS }, |
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{ "yzoom","set camera zoom", OFFSET(zoom[1]),AV_OPT_TYPE_FLOAT, {.dbl=1.f}, 0.01, 10, TFLAGS }, |
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{ "zzoom","set camera zoom", OFFSET(zoom[2]),AV_OPT_TYPE_FLOAT, {.dbl=1.f}, 0.01, 10, TFLAGS }, |
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{ "xpos", "set camera position", OFFSET(eye[0]), AV_OPT_TYPE_FLOAT, {.dbl=0.f},-60.f, 60.f, TFLAGS }, |
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{ "ypos", "set camera position", OFFSET(eye[1]), AV_OPT_TYPE_FLOAT, {.dbl=0.f},-60.f, 60.f, TFLAGS }, |
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{ "zpos", "set camera position", OFFSET(eye[2]), AV_OPT_TYPE_FLOAT, {.dbl=0.f},-60.f, 60.f, TFLAGS }, |
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{ "length","set length", OFFSET(size), AV_OPT_TYPE_INT, {.i64=15}, 1, 60, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(a3dscope); |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *formats = NULL; |
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AVFilterChannelLayouts *layouts = NULL; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; |
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE }; |
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int ret; |
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formats = ff_make_format_list(sample_fmts); |
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if ((ret = ff_formats_ref (formats, &inlink->outcfg.formats )) < 0) |
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return ret; |
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formats = ff_all_samplerates(); |
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if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0) |
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return ret; |
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formats = ff_make_format_list(pix_fmts); |
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if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0) |
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return ret; |
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layouts = ff_all_channel_counts(); |
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if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0) |
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return ret; |
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return 0; |
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} |
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static int config_input(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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Audio3dScopeContext *s = ctx->priv; |
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s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num)); |
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return 0; |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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Audio3dScopeContext *s = outlink->src->priv; |
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outlink->w = s->w; |
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outlink->h = s->h; |
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outlink->sample_aspect_ratio = (AVRational){1,1}; |
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outlink->frame_rate = s->frame_rate; |
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outlink->time_base = av_inv_q(outlink->frame_rate); |
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return 0; |
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} |
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static void projection_matrix(float fov, float a, float near, float far, |
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float matrix[4][4]) |
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{ |
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float f; |
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memset(matrix, 0, sizeof(*matrix)); |
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f = 1.0f / tanf(fov * 0.5f * M_PI / 180.f); |
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matrix[0][0] = f * a; |
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matrix[1][1] = f; |
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matrix[2][2] = -(far + near) / (far - near); |
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matrix[2][3] = -1.f; |
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matrix[3][2] = -(near * far) / (far - near); |
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} |
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static inline void vmultiply(const float v[4], const float m[4][4], float d[4]) |
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{ |
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d[0] = v[0] * m[0][0] + v[1] * m[1][0] + v[2] * m[2][0] + v[3] * m[3][0]; |
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d[1] = v[0] * m[0][1] + v[1] * m[1][1] + v[2] * m[2][1] + v[3] * m[3][1]; |
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d[2] = v[0] * m[0][2] + v[1] * m[1][2] + v[2] * m[2][2] + v[3] * m[3][2]; |
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d[3] = v[0] * m[0][3] + v[1] * m[1][3] + v[2] * m[2][3] + v[3] * m[3][3]; |
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} |
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static void mmultiply(const float m2[4][4], const float m1[4][4], float m[4][4]) |
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{ |
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vmultiply(m2[0], m1, m[0]); |
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vmultiply(m2[1], m1, m[1]); |
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vmultiply(m2[2], m1, m[2]); |
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vmultiply(m2[3], m1, m[3]); |
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} |
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static float vdot(const float x[3], const float y[3]) |
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{ |
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return x[0] * y[0] + x[1] * y[1] + x[2] * y[2]; |
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} |
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static void view_matrix(const float eye[3], |
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const float z[3], |
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const float roll, |
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const float pitch, |
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const float yaw, float m[4][4]) |
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{ |
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float cr = cosf(roll * M_PI / 180.f); |
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float sr = sinf(roll * M_PI / 180.f); |
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float cp = cosf(pitch * M_PI / 180.f); |
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float sp = sinf(pitch * M_PI / 180.f); |
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float cy = cosf(yaw * M_PI / 180.f); |
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float sy = sinf(yaw * M_PI / 180.f); |
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float t[4][4]; |
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float rx[4][4] = { |
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{z[0], 0.f, 0.f, 0.f }, |
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{ 0.f, cy, -sy, 0.f }, |
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{ 0.f, sy, cy, 0.f }, |
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{ 0.f, 0.f, 0.f, 1.f }, |
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}; |
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float ry[4][4] = { |
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{ cp, 0.f, sp, 0.f }, |
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{ 0.f,z[1], 0.f, 0.f }, |
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{-sp, 0.f, cp, 0.f }, |
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{ 0.f, 0.f, 0.f, 1.f }, |
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}; |
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float rz[4][4] = { |
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{ cr, -sr, 0.f, 0.f }, |
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{ sr, cr, 0.f, 0.f }, |
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{ 0.f, 0.f,z[2], 0.f }, |
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{ 0.f, 0.f, 0.f, 1.f }, |
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}; |
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memset(m, 0, sizeof(*m)); |
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mmultiply(rx, ry, t); |
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mmultiply(rz, t, m); |
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m[3][0] = -vdot(m[0], eye); |
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m[3][1] = -vdot(m[1], eye); |
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m[3][2] = -vdot(m[2], eye); |
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} |
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static void draw_dot(AVFrame *out, unsigned x, unsigned y, float z, |
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int r, int g, int b) |
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{ |
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const ptrdiff_t linesize = out->linesize[0]; |
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uint8_t *dst; |
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dst = out->data[0] + y * linesize + x * 4; |
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dst[0] = r * z; |
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dst[1] = g * z; |
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dst[2] = b * z; |
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dst[3] = 255 * z; |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
223 |
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{ |
224 |
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AVFilterContext *ctx = inlink->dst; |
225 |
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AVFilterLink *outlink = ctx->outputs[0]; |
226 |
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Audio3dScopeContext *s = ctx->priv; |
227 |
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const float half_height = (s->h - 1) * 0.5f; |
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const float half_width = (s->w - 1) * 0.5f; |
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float matrix[4][4]; |
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const int w = s->w; |
231 |
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const int h = s->h; |
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AVFrame *out; |
233 |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
235 |
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if (!out) { |
236 |
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av_frame_free(&in); |
237 |
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return AVERROR(ENOMEM); |
238 |
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} |
239 |
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240 |
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s->frames[0] = in; |
241 |
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242 |
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out->sample_aspect_ratio = (AVRational){1,1}; |
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for (int y = 0; y < outlink->h; y++) |
244 |
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memset(out->data[0] + y * out->linesize[0], 0, outlink->w * 4); |
245 |
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out->pts = av_rescale_q(in->pts, inlink->time_base, outlink->time_base); |
246 |
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out->duration = 1; |
247 |
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248 |
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projection_matrix(s->fov, half_width / half_height, 0.1f, 1000000.f, s->projection_matrix); |
249 |
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view_matrix(s->eye, s->zoom, s->roll, s->pitch, s->yaw, s->view_matrix); |
250 |
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mmultiply(s->projection_matrix, s->view_matrix, matrix); |
251 |
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252 |
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for (int nb_frame = s->size - 1; nb_frame >= 0; nb_frame--) { |
253 |
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const float scale = 1.f / s->nb_samples; |
254 |
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AVFrame *frame = s->frames[nb_frame]; |
255 |
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float channels; |
256 |
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257 |
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✗ |
if (!frame) |
258 |
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✗ |
continue; |
259 |
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260 |
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channels = frame->ch_layout.nb_channels; |
261 |
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for (int ch = 0; ch < channels; ch++) { |
262 |
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const float *src = (float *)frame->extended_data[ch]; |
263 |
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const int r = 128.f + 127.f * sinf(ch / (channels - 1) * M_PI); |
264 |
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const int g = 128.f + 127.f * ch / (channels - 1); |
265 |
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const int b = 128.f + 127.f * cosf(ch / (channels - 1) * M_PI); |
266 |
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267 |
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for (int n = frame->nb_samples - 1, nn = s->nb_samples * nb_frame; n >= 0; n--, nn++) { |
268 |
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float v[4] = { src[n], ch - (channels - 1) * 0.5f, -0.1f + -nn * scale, 1.f }; |
269 |
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float d[4]; |
270 |
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int x, y; |
271 |
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272 |
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✗ |
vmultiply(v, matrix, d); |
273 |
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274 |
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✗ |
d[0] /= d[3]; |
275 |
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✗ |
d[1] /= d[3]; |
276 |
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277 |
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✗ |
x = d[0] * half_width + half_width; |
278 |
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✗ |
y = d[1] * half_height + half_height; |
279 |
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280 |
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✗ |
if (x >= w || y >= h || x < 0 || y < 0) |
281 |
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✗ |
continue; |
282 |
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283 |
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✗ |
draw_dot(out, x, y, av_clipf(1.f / d[3], 0.f, 1.f), |
284 |
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r, g, b); |
285 |
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} |
286 |
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} |
287 |
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} |
288 |
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289 |
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✗ |
av_frame_free(&s->frames[59]); |
290 |
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✗ |
memmove(&s->frames[1], &s->frames[0], 59 * sizeof(AVFrame *)); |
291 |
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✗ |
s->frames[0] = NULL; |
292 |
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293 |
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✗ |
return ff_filter_frame(outlink, out); |
294 |
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} |
295 |
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296 |
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✗ |
static int activate(AVFilterContext *ctx) |
297 |
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{ |
298 |
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✗ |
AVFilterLink *inlink = ctx->inputs[0]; |
299 |
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✗ |
AVFilterLink *outlink = ctx->outputs[0]; |
300 |
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✗ |
Audio3dScopeContext *s = ctx->priv; |
301 |
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AVFrame *in; |
302 |
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int ret; |
303 |
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304 |
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✗ |
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
305 |
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306 |
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✗ |
ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in); |
307 |
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✗ |
if (ret < 0) |
308 |
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return ret; |
309 |
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✗ |
if (ret > 0) |
310 |
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✗ |
return filter_frame(inlink, in); |
311 |
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312 |
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✗ |
if (ff_inlink_queued_samples(inlink) >= s->nb_samples) { |
313 |
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✗ |
ff_filter_set_ready(ctx, 10); |
314 |
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✗ |
return 0; |
315 |
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} |
316 |
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|
317 |
|
✗ |
FF_FILTER_FORWARD_STATUS(inlink, outlink); |
318 |
|
✗ |
FF_FILTER_FORWARD_WANTED(outlink, inlink); |
319 |
|
|
|
320 |
|
✗ |
return FFERROR_NOT_READY; |
321 |
|
|
} |
322 |
|
|
|
323 |
|
✗ |
static av_cold void uninit(AVFilterContext *ctx) |
324 |
|
|
{ |
325 |
|
✗ |
Audio3dScopeContext *s = ctx->priv; |
326 |
|
|
|
327 |
|
✗ |
for (int n = 0; n < 60; n++) |
328 |
|
✗ |
av_frame_free(&s->frames[n]); |
329 |
|
✗ |
} |
330 |
|
|
|
331 |
|
|
static const AVFilterPad audio3dscope_inputs[] = { |
332 |
|
|
{ |
333 |
|
|
.name = "default", |
334 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
335 |
|
|
.config_props = config_input, |
336 |
|
|
}, |
337 |
|
|
}; |
338 |
|
|
|
339 |
|
|
static const AVFilterPad audio3dscope_outputs[] = { |
340 |
|
|
{ |
341 |
|
|
.name = "default", |
342 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
343 |
|
|
.config_props = config_output, |
344 |
|
|
}, |
345 |
|
|
}; |
346 |
|
|
|
347 |
|
|
const AVFilter ff_avf_a3dscope = { |
348 |
|
|
.name = "a3dscope", |
349 |
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to 3d scope video output."), |
350 |
|
|
.uninit = uninit, |
351 |
|
|
.priv_size = sizeof(Audio3dScopeContext), |
352 |
|
|
.activate = activate, |
353 |
|
|
FILTER_INPUTS(audio3dscope_inputs), |
354 |
|
|
FILTER_OUTPUTS(audio3dscope_outputs), |
355 |
|
|
FILTER_QUERY_FUNC(query_formats), |
356 |
|
|
.priv_class = &a3dscope_class, |
357 |
|
|
.process_command = ff_filter_process_command, |
358 |
|
|
}; |
359 |
|
|
|