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-rw-r--r--libavfilter/avf_showwaves.c726
1 files changed, 726 insertions, 0 deletions
diff --git a/libavfilter/avf_showwaves.c b/libavfilter/avf_showwaves.c
new file mode 100644
index 0000000000..900896462e
--- /dev/null
+++ b/libavfilter/avf_showwaves.c
@@ -0,0 +1,726 @@
+/*
+ * 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_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"},
+ { 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 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;
+ }
+
+ 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"},
+ { 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
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 13:01:27 +0000