123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726 |
- /*
- * 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, 0, FLAGS },
- { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 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(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
|