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FFmpeg/libavfilter/avf_showwaves.c

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/*
* Copyright (c) 2012 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* audio to video multimedia filter
*/
#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"
enum ShowWavesMode {
MODE_POINT,
MODE_LINE,
MODE_P2P,
MODE_CENTERED_LINE,
MODE_NB,
};
enum ShowWavesScale {
SCALE_LIN,
SCALE_LOG,
SCALE_SQRT,
SCALE_CBRT,
SCALE_NB,
};
enum ShowWavesDrawMode {
DRAW_SCALE,
DRAW_FULL,
DRAW_NB,
};
enum ShowWavesFilterMode {
FILTER_AVERAGE,
FILTER_PEAK,
FILTER_NB,
};
struct frame_node {
AVFrame *frame;
struct frame_node *next;
};
typedef struct ShowWavesContext {
const AVClass *class;
int w, h;
AVRational rate;
char *colors;
int buf_idx;
int16_t *buf_idy; /* y coordinate of previous sample for each channel */
int16_t *history;
int history_nb_samples;
int history_index;
AVFrame *outpicref;
AVRational n, q, c;
int pixstep;
int mode; ///< ShowWavesMode
int scale; ///< ShowWavesScale
int draw_mode; ///< ShowWavesDrawMode
int split_channels;
int filter_mode;
uint8_t *fg;
int (*get_h)(int16_t sample, int height);
void (*draw_sample)(uint8_t *buf, int height, int linesize,
int16_t *prev_y, const uint8_t color[4], int h);
/* single picture */
int single_pic;
struct frame_node *audio_frames;
struct frame_node *last_frame;
int64_t total_samples;
int64_t *sum; /* abs sum of the samples per channel */
} ShowWavesContext;
#define OFFSET(x) offsetof(ShowWavesContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showwaves_options[] = {
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
{ "point", "draw a point for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT}, .flags=FLAGS, .unit="mode"},
{ "line", "draw a line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE}, .flags=FLAGS, .unit="mode"},
{ "p2p", "draw a line between samples", 0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P}, .flags=FLAGS, .unit="mode"},
{ "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
{ "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_RATIONAL, {.i64 = 0}, 0, INT_MAX, FLAGS },
{ "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
{ "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
{ "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{ "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
{ "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
{ "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
{ "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
{ "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
{ NULL }
};
AVFILTER_DEFINE_CLASS(showwaves);
static av_cold void uninit(AVFilterContext *ctx)
{
ShowWavesContext *showwaves = ctx->priv;
av_frame_free(&showwaves->outpicref);
av_freep(&showwaves->buf_idy);
av_freep(&showwaves->history);
av_freep(&showwaves->fg);
if (showwaves->single_pic) {
struct frame_node *node = showwaves->audio_frames;
while (node) {
struct frame_node *tmp = node;
node = node->next;
av_frame_free(&tmp->frame);
av_freep(&tmp);
}
av_freep(&showwaves->sum);
showwaves->last_frame = NULL;
}
}
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
AVFilterChannelLayouts *layouts = NULL;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
int ret;
/* set input audio formats */
formats = ff_make_format_list(sample_fmts);
if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
return ret;
layouts = ff_all_channel_layouts();
if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
return ret;
formats = ff_all_samplerates();
if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
return ret;
/* set output video format */
formats = ff_make_format_list(pix_fmts);
if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
return ret;
return 0;
}
static int get_lin_h(int16_t sample, int height)
{
return height/2 - av_rescale(sample, height/2, INT16_MAX);
}
static int get_lin_h2(int16_t sample, int height)
{
return av_rescale(FFABS(sample), height, INT16_MAX);
}
static int get_log_h(int16_t sample, int height)
{
return height/2 - FFSIGN(sample) * (log10(1 + FFABS(sample)) * (height/2) / log10(1 + INT16_MAX));
}
static int get_log_h2(int16_t sample, int height)
{
return log10(1 + FFABS(sample)) * height / log10(1 + INT16_MAX);
}
static int get_sqrt_h(int16_t sample, int height)
{
return height/2 - FFSIGN(sample) * (sqrt(FFABS(sample)) * (height/2) / sqrt(INT16_MAX));
}
static int get_sqrt_h2(int16_t sample, int height)
{
return sqrt(FFABS(sample)) * height / sqrt(INT16_MAX);
}
static int get_cbrt_h(int16_t sample, int height)
{
return height/2 - FFSIGN(sample) * (cbrt(FFABS(sample)) * (height/2) / cbrt(INT16_MAX));
}
static int get_cbrt_h2(int16_t sample, int height)
{
return cbrt(FFABS(sample)) * height / cbrt(INT16_MAX);
}
static void draw_sample_point_rgba_scale(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
if (h >= 0 && h < height) {
buf[h * linesize + 0] += color[0];
buf[h * linesize + 1] += color[1];
buf[h * linesize + 2] += color[2];
buf[h * linesize + 3] += color[3];
}
}
static void draw_sample_point_rgba_full(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
uint32_t clr = AV_RN32(color);
if (h >= 0 && h < height)
AV_WN32(buf + h * linesize, clr);
}
static void draw_sample_line_rgba_scale(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
int start = height/2;
int end = av_clip(h, 0, height-1);
uint8_t *bufk;
if (start > end)
FFSWAP(int16_t, start, end);
bufk = buf + start * linesize;
for (int k = start; k < end; k++, bufk += linesize) {
bufk[0] += color[0];
bufk[1] += color[1];
bufk[2] += color[2];
bufk[3] += color[3];
}
}
static void draw_sample_line_rgba_full(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
int start = height/2;
int end = av_clip(h, 0, height-1);
uint32_t clr = AV_RN32(color);
uint8_t *bufk;
if (start > end)
FFSWAP(int16_t, start, end);
bufk = buf + start * linesize;
for (int k = start; k < end; k++, bufk += linesize)
AV_WN32(bufk, clr);
}
static void draw_sample_p2p_rgba_scale(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
if (h >= 0 && h < height) {
buf[h * linesize + 0] += color[0];
buf[h * linesize + 1] += color[1];
buf[h * linesize + 2] += color[2];
buf[h * linesize + 3] += color[3];
if (*prev_y && h != *prev_y) {
int start = *prev_y;
uint8_t *bufk;
int end = av_clip(h, 0, height-1);
if (start > end)
FFSWAP(int16_t, start, end);
bufk = buf + (start + 1) * linesize;
for (int k = start + 1; k < end; k++, bufk += linesize) {
bufk[0] += color[0];
bufk[1] += color[1];
bufk[2] += color[2];
bufk[3] += color[3];
}
}
}
*prev_y = h;
}
static void draw_sample_p2p_rgba_full(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
uint32_t clr = AV_RN32(color);
if (h >= 0 && h < height) {
AV_WN32(buf + h * linesize, clr);
if (*prev_y && h != *prev_y) {
int start = *prev_y;
uint8_t *bufk;
int end = av_clip(h, 0, height-1);
if (start > end)
FFSWAP(int16_t, start, end);
bufk = buf + (start + 1) * linesize;
for (int k = start + 1; k < end; k++, bufk += linesize)
AV_WN32(bufk, clr);
}
}
*prev_y = h;
}
static void draw_sample_cline_rgba_scale(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
const int start = (height - h) / 2;
const int end = start + h;
uint8_t *bufk = buf + start * linesize;
for (int k = start; k < end; k++, bufk += linesize) {
bufk[0] += color[0];
bufk[1] += color[1];
bufk[2] += color[2];
bufk[3] += color[3];
}
}
static void draw_sample_cline_rgba_full(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
uint32_t clr = AV_RN32(color);
const int start = (height - h) / 2;
const int end = start + h;
uint8_t *bufk = buf + start * linesize;
for (int k = start; k < end; k++, bufk += linesize)
AV_WN32(bufk, clr);
}
static void draw_sample_point_gray(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
if (h >= 0 && h < height)
buf[h * linesize] += color[0];
}
static void draw_sample_line_gray(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
int k;
int start = height/2;
int end = av_clip(h, 0, height-1);
if (start > end)
FFSWAP(int16_t, start, end);
for (k = start; k < end; k++)
buf[k * linesize] += color[0];
}
static void draw_sample_p2p_gray(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
int k;
if (h >= 0 && h < height) {
buf[h * linesize] += color[0];
if (*prev_y && h != *prev_y) {
int start = *prev_y;
int end = av_clip(h, 0, height-1);
if (start > end)
FFSWAP(int16_t, start, end);
for (k = start + 1; k < end; k++)
buf[k * linesize] += color[0];
}
}
*prev_y = h;
}
static void draw_sample_cline_gray(uint8_t *buf, int height, int linesize,
int16_t *prev_y,
const uint8_t color[4], int h)
{
int k;
const int start = (height - h) / 2;
const int end = start + h;
for (k = start; k < end; k++)
buf[k * linesize] += color[0];
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowWavesContext *showwaves = ctx->priv;
int nb_channels = inlink->ch_layout.nb_channels;
char *colors, *saveptr = NULL;
uint8_t x;
int ch;
showwaves->q = av_make_q(0, 1);
showwaves->c = av_make_q(0, 1);
if (showwaves->single_pic) {
showwaves->n = av_make_q(1, 1);
outlink->frame_rate = av_make_q(1, 1);
} else {
if (!showwaves->n.num || !showwaves->n.den) {
showwaves->n = av_mul_q(av_make_q(inlink->sample_rate,
showwaves->w), av_inv_q(showwaves->rate));
outlink->frame_rate = showwaves->rate;
} else {
outlink->frame_rate = av_div_q(av_make_q(inlink->sample_rate, showwaves->w), showwaves->n);
}
}
showwaves->buf_idx = 0;
if (!FF_ALLOCZ_TYPED_ARRAY(showwaves->buf_idy, nb_channels)) {
av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
return AVERROR(ENOMEM);
}
showwaves->history_nb_samples = av_rescale(showwaves->w * nb_channels * 2,
showwaves->n.num, showwaves->n.den);
showwaves->history = av_calloc(showwaves->history_nb_samples,
sizeof(*showwaves->history));
if (!showwaves->history)
return AVERROR(ENOMEM);
outlink->time_base = av_inv_q(outlink->frame_rate);
outlink->w = showwaves->w;
outlink->h = showwaves->h;
outlink->sample_aspect_ratio = (AVRational){1,1};
av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%f\n",
showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), av_q2d(showwaves->n));
switch (outlink->format) {
case AV_PIX_FMT_GRAY8:
switch (showwaves->mode) {
case MODE_POINT: showwaves->draw_sample = draw_sample_point_gray; break;
case MODE_LINE: showwaves->draw_sample = draw_sample_line_gray; break;
case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_gray; break;
case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_gray; break;
default:
return AVERROR_BUG;
}
showwaves->pixstep = 1;
break;
case AV_PIX_FMT_RGBA:
switch (showwaves->mode) {
case MODE_POINT: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_point_rgba_scale : draw_sample_point_rgba_full; break;
case MODE_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_line_rgba_scale : draw_sample_line_rgba_full; break;
case MODE_P2P: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_p2p_rgba_scale : draw_sample_p2p_rgba_full; break;
case MODE_CENTERED_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_cline_rgba_scale : draw_sample_cline_rgba_full; break;
default:
return AVERROR_BUG;
}
showwaves->pixstep = 4;
break;
}
switch (showwaves->scale) {
case SCALE_LIN:
switch (showwaves->mode) {
case MODE_POINT:
case MODE_LINE:
case MODE_P2P: showwaves->get_h = get_lin_h; break;
case MODE_CENTERED_LINE: showwaves->get_h = get_lin_h2; break;
default:
return AVERROR_BUG;
}
break;
case SCALE_LOG:
switch (showwaves->mode) {
case MODE_POINT:
case MODE_LINE:
case MODE_P2P: showwaves->get_h = get_log_h; break;
case MODE_CENTERED_LINE: showwaves->get_h = get_log_h2; break;
default:
return AVERROR_BUG;
}
break;
case SCALE_SQRT:
switch (showwaves->mode) {
case MODE_POINT:
case MODE_LINE:
case MODE_P2P: showwaves->get_h = get_sqrt_h; break;
case MODE_CENTERED_LINE: showwaves->get_h = get_sqrt_h2; break;
default:
return AVERROR_BUG;
}
break;
case SCALE_CBRT:
switch (showwaves->mode) {
case MODE_POINT:
case MODE_LINE:
case MODE_P2P: showwaves->get_h = get_cbrt_h; break;
case MODE_CENTERED_LINE: showwaves->get_h = get_cbrt_h2; break;
default:
return AVERROR_BUG;
}
break;
}
showwaves->fg = av_malloc_array(nb_channels, 4 * sizeof(*showwaves->fg));
if (!showwaves->fg)
return AVERROR(ENOMEM);
colors = av_strdup(showwaves->colors);
if (!colors)
return AVERROR(ENOMEM);
if (showwaves->draw_mode == DRAW_SCALE) {
/* multiplication factor, pre-computed to avoid in-loop divisions */
x = (showwaves->n.den * 255) / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n.num);
} else {
x = 255;
}
if (outlink->format == AV_PIX_FMT_RGBA) {
uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
for (ch = 0; ch < nb_channels; ch++) {
char *color;
color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
if (color)
av_parse_color(fg, color, -1, ctx);
showwaves->fg[4*ch + 0] = fg[0] * x / 255.;
showwaves->fg[4*ch + 1] = fg[1] * x / 255.;
showwaves->fg[4*ch + 2] = fg[2] * x / 255.;
showwaves->fg[4*ch + 3] = fg[3] * x / 255.;
}
} else {
for (ch = 0; ch < nb_channels; ch++)
showwaves->fg[4 * ch + 0] = x;
}
av_free(colors);
return 0;
}
inline static int push_frame(AVFilterLink *outlink, int i, int64_t pts)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowWavesContext *showwaves = outlink->src->priv;
int nb_channels = inlink->ch_layout.nb_channels;
int ret;
showwaves->outpicref->duration = 1;
showwaves->outpicref->pts = av_rescale_q(pts + i,
inlink->time_base,
outlink->time_base);
ret = ff_filter_frame(outlink, showwaves->outpicref);
showwaves->outpicref = NULL;
showwaves->buf_idx = 0;
for (int i = 0; i < nb_channels; i++)
showwaves->buf_idy[i] = 0;
return ret;
}
static int push_single_pic(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowWavesContext *showwaves = ctx->priv;
int64_t n = 0, column_max_samples = showwaves->total_samples / outlink->w;
int64_t remaining_samples = showwaves->total_samples - (column_max_samples * outlink->w);
int64_t last_column_samples = column_max_samples + remaining_samples;
AVFrame *out = showwaves->outpicref;
struct frame_node *node;
const int nb_channels = inlink->ch_layout.nb_channels;
const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
const int linesize = out->linesize[0];
const int pixstep = showwaves->pixstep;
int col = 0;
int64_t *sum = showwaves->sum;
if (column_max_samples == 0) {
av_log(ctx, AV_LOG_ERROR, "Too few samples\n");
return AVERROR(EINVAL);
}
av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per column\n", column_max_samples);
memset(sum, 0, nb_channels * sizeof(*sum));
for (node = showwaves->audio_frames; node; node = node->next) {
int i;
const AVFrame *frame = node->frame;
const int16_t *p = (const int16_t *)frame->data[0];
for (i = 0; i < frame->nb_samples; i++) {
int64_t max_samples = col == outlink->w - 1 ? last_column_samples: column_max_samples;
int ch;
switch (showwaves->filter_mode) {
case FILTER_AVERAGE:
for (ch = 0; ch < nb_channels; ch++)
sum[ch] += abs(p[ch + i*nb_channels]);
break;
case FILTER_PEAK:
for (ch = 0; ch < nb_channels; ch++)
sum[ch] = FFMAX(sum[ch], abs(p[ch + i*nb_channels]));
break;
}
n++;
if (n == max_samples) {
for (ch = 0; ch < nb_channels; ch++) {
int16_t sample = sum[ch] / (showwaves->filter_mode == FILTER_AVERAGE ? max_samples : 1);
uint8_t *buf = out->data[0] + col * pixstep;
int h;
if (showwaves->split_channels)
buf += ch*ch_height*linesize;
av_assert0(col < outlink->w);
h = showwaves->get_h(sample, ch_height);
showwaves->draw_sample(buf, ch_height, linesize, &showwaves->buf_idy[ch], &showwaves->fg[ch * 4], h);
sum[ch] = 0;
}
col++;
n = 0;
}
}
}
return push_frame(outlink, 0, 0);
}
static int request_frame(AVFilterLink *outlink)
{
ShowWavesContext *showwaves = outlink->src->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
int ret;
ret = ff_request_frame(inlink);
if (ret == AVERROR_EOF && showwaves->outpicref) {
push_single_pic(outlink);
}
return ret;
}
static int alloc_out_frame(ShowWavesContext *showwaves,
AVFilterLink *outlink)
{
if (!showwaves->outpicref) {
AVFrame *out = showwaves->outpicref =
ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
out->width = outlink->w;
out->height = outlink->h;
for (int j = 0; j < outlink->h; j++)
memset(out->data[0] + j*out->linesize[0], 0, outlink->w * showwaves->pixstep);
}
return 0;
}
static av_cold int init(AVFilterContext *ctx)
{
ShowWavesContext *showwaves = ctx->priv;
if (!strcmp(ctx->filter->name, "showwavespic")) {
showwaves->single_pic = 1;
showwaves->mode = MODE_CENTERED_LINE;
}
return 0;
}
#if CONFIG_SHOWWAVES_FILTER
static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ShowWavesContext *showwaves = ctx->priv;
const int nb_samples = insamples->nb_samples;
AVFrame *outpicref = showwaves->outpicref;
const int16_t *p = (const int16_t *)insamples->data[0];
int16_t *history = showwaves->history;
const int nb_channels = inlink->ch_layout.nb_channels;
int i, j, ret = 0, linesize;
const int pixstep = showwaves->pixstep;
const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
const int history_nb_samples = showwaves->history_nb_samples;
const int split_channels = showwaves->split_channels;
const AVRational i_n = av_inv_q(showwaves->n);
const AVRational u_q = av_make_q(1, 1);
const AVRational z_q = av_make_q(0, 1);
int16_t *buf_idy = showwaves->buf_idy;
int idx = showwaves->history_index;
int buf_idx = showwaves->buf_idx;
const uint8_t *fg = showwaves->fg;
const int w = showwaves->w;
uint8_t *dst;
for (int n = 0; n < nb_samples * nb_channels; n++) {
history[idx++] = p[n];
if (idx >= history_nb_samples)
idx = 0;
}
showwaves->history_index = idx;
ret = alloc_out_frame(showwaves, outlink);
if (ret < 0)
goto end;
outpicref = showwaves->outpicref;
linesize = outpicref->linesize[0];
/* draw data in the buffer */
dst = outpicref->data[0];
for (i = 0; i < history_nb_samples; i++) {
for (j = 0; j < nb_channels; j++) {
uint8_t *buf = dst + buf_idx * pixstep;
int h;
if (split_channels)
buf += j*ch_height*linesize;
h = showwaves->get_h(history[idx++], ch_height);
if (idx >= history_nb_samples)
idx = 0;
showwaves->draw_sample(buf, ch_height, linesize,
&buf_idy[j], &fg[j * 4], h);
}
showwaves->c = av_add_q(showwaves->c, i_n);
if (av_cmp_q(showwaves->c, u_q) >= 0) {
showwaves->c = z_q;
buf_idx++;
}
if (buf_idx == w)
break;
}
showwaves->buf_idx = buf_idx;
if ((ret = push_frame(outlink, history_nb_samples - i - 1, insamples->pts)) < 0)
goto end;
outpicref = showwaves->outpicref;
end:
av_frame_free(&insamples);
return ret;
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
ShowWavesContext *showwaves = ctx->priv;
AVRational q;
AVFrame *in;
int nb_samples;
int ret;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
q = av_add_q(showwaves->q, av_mul_q(av_make_q(outlink->w, 1), showwaves->n));
nb_samples = (q.num + (q.den / 2)) / q.den;
ret = ff_inlink_consume_samples(inlink, nb_samples, nb_samples, &in);
if (ret < 0)
return ret;
if (ret > 0) {
showwaves->q = av_sub_q(q, av_make_q(nb_samples, 1));
return showwaves_filter_frame(inlink, in);
}
FF_FILTER_FORWARD_STATUS(inlink, outlink);
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static const AVFilterPad showwaves_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
},
};
static const AVFilterPad showwaves_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_avf_showwaves = {
.name = "showwaves",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(ShowWavesContext),
FILTER_INPUTS(showwaves_inputs),
.activate = activate,
FILTER_OUTPUTS(showwaves_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &showwaves_class,
};
#endif // CONFIG_SHOWWAVES_FILTER
#if CONFIG_SHOWWAVESPIC_FILTER
#define OFFSET(x) offsetof(ShowWavesContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption showwavespic_options[] = {
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
{ "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{ "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
{ "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
{ "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
{ "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
{ "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
{ "filter", "set filter mode", OFFSET(filter_mode), AV_OPT_TYPE_INT, {.i64 = FILTER_AVERAGE}, 0, FILTER_NB-1, FLAGS, .unit="filter" },
{ "average", "use average samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_AVERAGE}, .flags=FLAGS, .unit="filter"},
{ "peak", "use peak samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_PEAK}, .flags=FLAGS, .unit="filter"},
{ NULL }
};
AVFILTER_DEFINE_CLASS(showwavespic);
static int showwavespic_config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ShowWavesContext *showwaves = ctx->priv;
if (showwaves->single_pic) {
showwaves->sum = av_calloc(inlink->ch_layout.nb_channels, sizeof(*showwaves->sum));
if (!showwaves->sum)
return AVERROR(ENOMEM);
}
return 0;
}
static int showwavespic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ShowWavesContext *showwaves = ctx->priv;
int ret = 0;
if (showwaves->single_pic) {
struct frame_node *f;
ret = alloc_out_frame(showwaves, outlink);
if (ret < 0)
goto end;
/* queue the audio frame */
f = av_malloc(sizeof(*f));
if (!f) {
ret = AVERROR(ENOMEM);
goto end;
}
f->frame = insamples;
f->next = NULL;
if (!showwaves->last_frame) {
showwaves->audio_frames =
showwaves->last_frame = f;
} else {
showwaves->last_frame->next = f;
showwaves->last_frame = f;
}
showwaves->total_samples += insamples->nb_samples;
return 0;
}
end:
av_frame_free(&insamples);
return ret;
}
static const AVFilterPad showwavespic_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = showwavespic_config_input,
.filter_frame = showwavespic_filter_frame,
},
};
static const AVFilterPad showwavespic_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
};
const AVFilter ff_avf_showwavespic = {
.name = "showwavespic",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(ShowWavesContext),
FILTER_INPUTS(showwavespic_inputs),
FILTER_OUTPUTS(showwavespic_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &showwavespic_class,
};
#endif // CONFIG_SHOWWAVESPIC_FILTER
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