FFmpeg/libavfilter/avf_showwaves.c
Moritz Barsnick 114bbb0b74 libavfilter/avf_showwaves: make sqrt and cbrt scale option values available to showwavespic by name
The 'sqrt' and 'cbrt' scalers were added in commit
80262d8c86, but their symbolic option values
only made available to the showwaves filter, not showwavespic, despite
the scalers working properly by their numerical option values.

Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
2017-03-11 11:55:57 +01:00

773 lines
25 KiB
C

/*
* 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 "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.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,
};
struct frame_node {
AVFrame *frame;
struct frame_node *next;
};
typedef struct {
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 */
AVFrame *outpicref;
int n;
int pixstep;
int sample_count_mod;
int mode; ///< ShowWavesMode
int scale; ///< ShowWavesScale
int split_channels;
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_INT, {.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"},
{ 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->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->out_formats)) < 0)
return ret;
layouts = ff_all_channel_layouts();
if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
return ret;
formats = ff_all_samplerates();
if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
return ret;
/* set output video format */
formats = ff_make_format_list(pix_fmts);
if ((ret = ff_formats_ref(formats, &outlink->in_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(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_line_rgba(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 + 0] += color[0];
buf[k * linesize + 1] += color[1];
buf[k * linesize + 2] += color[2];
buf[k * linesize + 3] += color[3];
}
}
static void draw_sample_p2p_rgba(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 + 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;
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 + 0] += color[0];
buf[k * linesize + 1] += color[1];
buf[k * linesize + 2] += color[2];
buf[k * linesize + 3] += color[3];
}
}
}
*prev_y = h;
}
static void draw_sample_cline_rgba(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 + 0] += color[0];
buf[k * linesize + 1] += color[1];
buf[k * linesize + 2] += color[2];
buf[k * linesize + 3] += color[3];
}
}
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->channels;
char *colors, *saveptr = NULL;
uint8_t x;
int ch;
if (showwaves->single_pic)
showwaves->n = 1;
if (!showwaves->n)
showwaves->n = FFMAX(1, ((double)inlink->sample_rate / (showwaves->w * av_q2d(showwaves->rate))) + 0.5);
showwaves->buf_idx = 0;
if (!(showwaves->buf_idy = av_mallocz_array(nb_channels, sizeof(*showwaves->buf_idy)))) {
av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
return AVERROR(ENOMEM);
}
outlink->w = showwaves->w;
outlink->h = showwaves->h;
outlink->sample_aspect_ratio = (AVRational){1,1};
outlink->frame_rate = av_div_q((AVRational){inlink->sample_rate,showwaves->n},
(AVRational){showwaves->w,1});
av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), 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 = draw_sample_point_rgba; break;
case MODE_LINE: showwaves->draw_sample = draw_sample_line_rgba; break;
case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_rgba; break;
case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_rgba; 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);
/* multiplication factor, pre-computed to avoid in-loop divisions */
x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n);
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)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ShowWavesContext *showwaves = outlink->src->priv;
int nb_channels = inlink->channels;
int ret, i;
ret = ff_filter_frame(outlink, showwaves->outpicref);
showwaves->outpicref = NULL;
showwaves->buf_idx = 0;
for (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, max_samples = showwaves->total_samples / outlink->w;
AVFrame *out = showwaves->outpicref;
struct frame_node *node;
const int nb_channels = inlink->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 (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", max_samples);
memset(sum, 0, nb_channels);
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++) {
int ch;
for (ch = 0; ch < nb_channels; ch++)
sum[ch] += abs(p[ch + i*nb_channels]) << 1;
if (n++ == max_samples) {
for (ch = 0; ch < nb_channels; ch++) {
int16_t sample = sum[ch] / max_samples;
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);
}
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) {
if (showwaves->single_pic)
push_single_pic(outlink);
else
push_frame(outlink);
}
return ret;
}
static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
const AVFilterLink *inlink, AVFilterLink *outlink,
const AVFrame *in)
{
if (!showwaves->outpicref) {
int j;
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;
out->pts = in->pts + av_rescale_q((p - (int16_t *)in->data[0]) / inlink->channels,
av_make_q(1, inlink->sample_rate),
outlink->time_base);
for (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;
int16_t *p = (int16_t *)insamples->data[0];
int nb_channels = inlink->channels;
int i, j, ret = 0;
const int pixstep = showwaves->pixstep;
const int n = showwaves->n;
const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
/* draw data in the buffer */
for (i = 0; i < nb_samples; i++) {
ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
if (ret < 0)
goto end;
outpicref = showwaves->outpicref;
for (j = 0; j < nb_channels; j++) {
uint8_t *buf = outpicref->data[0] + showwaves->buf_idx * pixstep;
const int linesize = outpicref->linesize[0];
int h;
if (showwaves->split_channels)
buf += j*ch_height*linesize;
h = showwaves->get_h(*p++, ch_height);
showwaves->draw_sample(buf, ch_height, linesize,
&showwaves->buf_idy[j], &showwaves->fg[j * 4], h);
}
showwaves->sample_count_mod++;
if (showwaves->sample_count_mod == n) {
showwaves->sample_count_mod = 0;
showwaves->buf_idx++;
}
if (showwaves->buf_idx == showwaves->w)
if ((ret = push_frame(outlink)) < 0)
break;
outpicref = showwaves->outpicref;
}
end:
av_frame_free(&insamples);
return ret;
}
static const AVFilterPad showwaves_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = showwaves_filter_frame,
},
{ NULL }
};
static const AVFilterPad showwaves_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter ff_avf_showwaves = {
.name = "showwaves",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(ShowWavesContext),
.inputs = showwaves_inputs,
.outputs = showwaves_outputs,
.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"},
{ 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_mallocz_array(inlink->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;
int16_t *p = (int16_t *)insamples->data[0];
int ret = 0;
if (showwaves->single_pic) {
struct frame_node *f;
ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
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,
},
{ NULL }
};
static const AVFilterPad showwavespic_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
{ NULL }
};
AVFilter ff_avf_showwavespic = {
.name = "showwavespic",
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(ShowWavesContext),
.inputs = showwavespic_inputs,
.outputs = showwavespic_outputs,
.priv_class = &showwavespic_class,
};
#endif // CONFIG_SHOWWAVESPIC_FILTER