avfilter/avf_showwaves: color support
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
1dd11160ea
commit
6ed3a10f64
@ -24,6 +24,7 @@
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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@ -50,15 +51,18 @@ typedef struct {
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const AVClass *class;
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int w, h;
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AVRational rate;
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char *colors;
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int buf_idx;
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int16_t *buf_idy; /* y coordinate of previous sample for each channel */
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AVFrame *outpicref;
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int n;
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int pixstep;
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int sample_count_mod;
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int mode; ///< ShowWavesMode
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int split_channels;
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uint8_t *fg;
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void (*draw_sample)(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y, int intensity);
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int16_t sample, int16_t *prev_y, const uint8_t color[4]);
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/* single picture */
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int single_pic;
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@ -83,6 +87,7 @@ static const AVOption showwaves_options[] = {
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{ "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
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{ "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
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{ "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
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{ "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
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{ NULL }
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};
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@ -94,6 +99,7 @@ static av_cold void uninit(AVFilterContext *ctx)
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av_frame_free(&showwaves->outpicref);
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av_freep(&showwaves->buf_idy);
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av_freep(&showwaves->fg);
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if (showwaves->single_pic) {
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struct frame_node *node = showwaves->audio_frames;
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@ -116,7 +122,7 @@ static int query_formats(AVFilterContext *ctx)
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
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int ret;
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/* set input audio formats */
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@ -140,12 +146,147 @@ static int query_formats(AVFilterContext *ctx)
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return 0;
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}
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static void draw_sample_point_rgba(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height) {
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buf[h * linesize + 0] += color[0];
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buf[h * linesize + 1] += color[1];
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buf[h * linesize + 2] += color[2];
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buf[h * linesize + 3] += color[3];
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}
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}
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static void draw_sample_line_rgba(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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int start = height/2;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start; k < end; k++) {
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buf[k * linesize + 0] += color[0];
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buf[k * linesize + 1] += color[1];
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buf[k * linesize + 2] += color[2];
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buf[k * linesize + 3] += color[3];
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}
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}
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static void draw_sample_p2p_rgba(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height) {
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buf[h * linesize + 0] += color[0];
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buf[h * linesize + 1] += color[1];
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buf[h * linesize + 2] += color[2];
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buf[h * linesize + 3] += color[3];
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if (*prev_y && h != *prev_y) {
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int start = *prev_y;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start + 1; k < end; k++) {
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buf[k * linesize + 0] += color[0];
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buf[k * linesize + 1] += color[1];
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buf[k * linesize + 2] += color[2];
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buf[k * linesize + 3] += color[3];
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}
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}
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}
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*prev_y = h;
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}
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static void draw_sample_cline_rgba(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = av_rescale(abs(sample), height, INT16_MAX);
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const int start = (height - h) / 2;
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const int end = start + h;
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for (k = start; k < end; k++) {
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buf[k * linesize + 0] += color[0];
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buf[k * linesize + 1] += color[1];
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buf[k * linesize + 2] += color[2];
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buf[k * linesize + 3] += color[3];
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}
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}
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static void draw_sample_point_gray(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height)
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buf[h * linesize] += color[0];
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}
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static void draw_sample_line_gray(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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int start = height/2;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start; k < end; k++)
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buf[k * linesize] += color[0];
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}
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static void draw_sample_p2p_gray(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height) {
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buf[h * linesize] += color[0];
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if (*prev_y && h != *prev_y) {
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int start = *prev_y;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start + 1; k < end; k++)
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buf[k * linesize] += color[0];
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}
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}
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*prev_y = h;
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}
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static void draw_sample_cline_gray(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y,
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const uint8_t color[4])
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{
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int k;
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const int h = av_rescale(abs(sample), height, INT16_MAX);
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const int start = (height - h) / 2;
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const int end = start + h;
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for (k = start; k < end; k++)
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buf[k * linesize] += color[0];
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AVFilterLink *inlink = ctx->inputs[0];
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ShowWavesContext *showwaves = ctx->priv;
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int nb_channels = inlink->channels;
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char *colors, *saveptr = NULL;
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uint8_t x;
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int ch;
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if (showwaves->single_pic)
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showwaves->n = 1;
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if (!showwaves->n)
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showwaves->n = FFMAX(1, ((double)inlink->sample_rate / (showwaves->w * av_q2d(showwaves->rate))) + 0.5);
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@ -164,6 +305,62 @@ static int config_output(AVFilterLink *outlink)
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av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
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showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), showwaves->n);
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switch (outlink->format) {
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case AV_PIX_FMT_GRAY8:
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switch (showwaves->mode) {
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case MODE_POINT: showwaves->draw_sample = draw_sample_point_gray; break;
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case MODE_LINE: showwaves->draw_sample = draw_sample_line_gray; break;
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case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_gray; break;
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case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_gray; break;
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default:
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return AVERROR_BUG;
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}
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showwaves->pixstep = 1;
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break;
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case AV_PIX_FMT_RGBA:
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switch (showwaves->mode) {
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case MODE_POINT: showwaves->draw_sample = draw_sample_point_rgba; break;
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case MODE_LINE: showwaves->draw_sample = draw_sample_line_rgba; break;
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case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_rgba; break;
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case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_rgba; break;
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default:
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return AVERROR_BUG;
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}
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showwaves->pixstep = 4;
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break;
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}
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showwaves->fg = av_malloc_array(nb_channels, 4 * sizeof(*showwaves->fg));
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if (!showwaves->fg)
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return AVERROR(ENOMEM);
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colors = av_strdup(showwaves->colors);
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if (!colors)
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return AVERROR(ENOMEM);
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/* multiplication factor, pre-computed to avoid in-loop divisions */
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x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n);
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if (outlink->format == AV_PIX_FMT_RGBA) {
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uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
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for (ch = 0; ch < nb_channels; ch++) {
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char *color;
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color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
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if (color)
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av_parse_color(fg, color, -1, ctx);
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showwaves->fg[4*ch + 0] = fg[0] * x / 255.;
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showwaves->fg[4*ch + 1] = fg[1] * x / 255.;
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showwaves->fg[4*ch + 2] = fg[2] * x / 255.;
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showwaves->fg[4*ch + 3] = fg[3] * x / 255.;
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}
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} else {
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for (ch = 0; ch < nb_channels; ch++)
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showwaves->fg[4 * ch + 0] = x;
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}
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av_free(colors);
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return 0;
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}
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@ -192,9 +389,9 @@ static int push_single_pic(AVFilterLink *outlink)
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AVFrame *out = showwaves->outpicref;
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struct frame_node *node;
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const int nb_channels = inlink->channels;
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const int x = 255 / (showwaves->split_channels ? 1 : nb_channels);
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const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
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const int linesize = out->linesize[0];
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const int pixstep = showwaves->pixstep;
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int col = 0;
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int64_t *sum = showwaves->sum;
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@ -220,11 +417,11 @@ static int push_single_pic(AVFilterLink *outlink)
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if (n++ == max_samples) {
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for (ch = 0; ch < nb_channels; ch++) {
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int16_t sample = sum[ch] / max_samples;
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uint8_t *buf = out->data[0] + col;
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uint8_t *buf = out->data[0] + col * pixstep;
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if (showwaves->split_channels)
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buf += ch*ch_height*linesize;
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av_assert0(col < outlink->w);
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showwaves->draw_sample(buf, ch_height, linesize, sample, &showwaves->buf_idy[ch], x);
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showwaves->draw_sample(buf, ch_height, linesize, sample, &showwaves->buf_idy[ch], &showwaves->fg[ch * 4]);
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sum[ch] = 0;
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}
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col++;
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@ -254,57 +451,6 @@ static int request_frame(AVFilterLink *outlink)
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return ret;
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}
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static void draw_sample_point(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y, int intensity)
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{
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height)
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buf[h * linesize] += intensity;
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}
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static void draw_sample_line(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y, int intensity)
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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int start = height/2;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start; k < end; k++)
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buf[k * linesize] += intensity;
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}
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static void draw_sample_p2p(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y, int intensity)
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{
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int k;
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const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
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if (h >= 0 && h < height) {
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buf[h * linesize] += intensity;
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if (*prev_y && h != *prev_y) {
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int start = *prev_y;
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int end = av_clip(h, 0, height-1);
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if (start > end)
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FFSWAP(int16_t, start, end);
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for (k = start + 1; k < end; k++)
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buf[k * linesize] += intensity;
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}
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}
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*prev_y = h;
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}
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static void draw_sample_cline(uint8_t *buf, int height, int linesize,
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int16_t sample, int16_t *prev_y, int intensity)
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{
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int k;
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const int h = av_rescale(abs(sample), height, INT16_MAX);
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const int start = (height - h) / 2;
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const int end = start + h;
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for (k = start; k < end; k++)
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buf[k * linesize] += intensity;
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}
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static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
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const AVFilterLink *inlink, AVFilterLink *outlink,
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const AVFrame *in)
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@ -321,7 +467,7 @@ static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
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av_make_q(1, inlink->sample_rate),
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outlink->time_base);
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for (j = 0; j < outlink->h; j++)
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memset(out->data[0] + j*out->linesize[0], 0, outlink->w);
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memset(out->data[0] + j*out->linesize[0], 0, outlink->w * showwaves->pixstep);
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}
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return 0;
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}
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@ -335,14 +481,6 @@ static av_cold int init(AVFilterContext *ctx)
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showwaves->mode = MODE_CENTERED_LINE;
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}
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switch (showwaves->mode) {
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case MODE_POINT: showwaves->draw_sample = draw_sample_point; break;
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case MODE_LINE: showwaves->draw_sample = draw_sample_line; break;
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case MODE_P2P: showwaves->draw_sample = draw_sample_p2p; break;
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case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline; break;
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default:
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return AVERROR_BUG;
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}
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return 0;
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}
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@ -358,8 +496,8 @@ static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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int16_t *p = (int16_t *)insamples->data[0];
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int nb_channels = inlink->channels;
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int i, j, ret = 0;
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const int pixstep = showwaves->pixstep;
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const int n = showwaves->n;
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const int x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * n); /* multiplication factor, pre-computed to avoid in-loop divisions */
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const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
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/* draw data in the buffer */
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@ -371,12 +509,12 @@ static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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outpicref = showwaves->outpicref;
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for (j = 0; j < nb_channels; j++) {
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uint8_t *buf = outpicref->data[0] + showwaves->buf_idx;
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uint8_t *buf = outpicref->data[0] + showwaves->buf_idx * pixstep;
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const int linesize = outpicref->linesize[0];
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if (showwaves->split_channels)
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buf += j*ch_height*linesize;
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showwaves->draw_sample(buf, ch_height, linesize, *p++,
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&showwaves->buf_idy[j], x);
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&showwaves->buf_idy[j], &showwaves->fg[j * 4]);
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}
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showwaves->sample_count_mod++;
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@ -437,6 +575,7 @@ static const AVOption showwavespic_options[] = {
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
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{ "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 },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user