* audio to video multimedia filter
*/
+#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
MODE_NB,
};
+struct frame_node {
+ AVFrame *frame;
+ struct frame_node *next;
+};
+
typedef struct {
const AVClass *class;
int w, h;
int buf_idx;
int16_t *buf_idy; /* y coordinate of previous sample for each channel */
AVFrame *outpicref;
- int req_fullfilled;
int n;
int sample_count_mod;
- enum ShowWavesMode mode;
+ int mode; ///< ShowWavesMode
+ int split_channels;
+ void (*draw_sample)(uint8_t *buf, int height, int linesize,
+ int16_t sample, int16_t *prev_y, int intensity);
+
+ /* 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)
{ "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"},
+ { "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 },
{ NULL }
};
av_frame_free(&showwaves->outpicref);
av_freep(&showwaves->buf_idy);
+
+ 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)
int nb_channels = inlink->channels;
int ret, i;
- if ((ret = ff_filter_frame(outlink, showwaves->outpicref)) >= 0)
- showwaves->req_fullfilled = 1;
+ ret = ff_filter_frame(outlink, showwaves->outpicref);
showwaves->outpicref = NULL;
showwaves->buf_idx = 0;
- for (i = 0; i <= nb_channels; i++)
+ 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 x = 255 / (showwaves->split_channels ? 1 : nb_channels);
+ const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
+ const int linesize = out->linesize[0];
+ 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;
+ if (showwaves->split_channels)
+ buf += ch*ch_height*linesize;
+ av_assert0(col < outlink->w);
+ showwaves->draw_sample(buf, ch_height, linesize, sample, &showwaves->buf_idy[ch], x);
+ 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;
- showwaves->req_fullfilled = 0;
- do {
- ret = ff_request_frame(inlink);
- } while (!showwaves->req_fullfilled && ret >= 0);
+ ret = ff_request_frame(inlink);
+ if (ret == AVERROR_EOF && showwaves->outpicref) {
+ if (showwaves->single_pic)
+ push_single_pic(outlink);
+ else
+ push_frame(outlink);
+ }
- if (ret == AVERROR_EOF && showwaves->outpicref)
- push_frame(outlink);
return ret;
}
-#define MAX_INT16 ((1<<15) -1)
+static void draw_sample_point(uint8_t *buf, int height, int linesize,
+ int16_t sample, int16_t *prev_y, int intensity)
+{
+ const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
+ if (h >= 0 && h < height)
+ buf[h * linesize] += intensity;
+}
+
+static void draw_sample_line(uint8_t *buf, int height, int linesize,
+ int16_t sample, int16_t *prev_y, int intensity)
+{
+ int k;
+ const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
+ 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] += intensity;
+}
+
+static void draw_sample_p2p(uint8_t *buf, int height, int linesize,
+ int16_t sample, int16_t *prev_y, int intensity)
+{
+ int k;
+ const int h = height/2 - av_rescale(sample, height/2, INT16_MAX);
+ if (h >= 0 && h < height) {
+ buf[h * linesize] += intensity;
+ 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] += intensity;
+ }
+ }
+ *prev_y = h;
+}
-static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
+static void draw_sample_cline(uint8_t *buf, int height, int linesize,
+ int16_t sample, int16_t *prev_y, int intensity)
+{
+ int k;
+ const int h = av_rescale(abs(sample), height, INT16_MAX);
+ const int start = (height - h) / 2;
+ const int end = start + h;
+ for (k = start; k < end; k++)
+ buf[k * linesize] += intensity;
+}
+
+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);
+ }
+ 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;
+ }
+
+ switch (showwaves->mode) {
+ case MODE_POINT: showwaves->draw_sample = draw_sample_point; break;
+ case MODE_LINE: showwaves->draw_sample = draw_sample_line; break;
+ case MODE_P2P: showwaves->draw_sample = draw_sample_p2p; break;
+ case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline; break;
+ default:
+ return AVERROR_BUG;
+ }
+ 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;
- int linesize = outpicref ? outpicref->linesize[0] : 0;
int16_t *p = (int16_t *)insamples->data[0];
int nb_channels = inlink->channels;
- int i, j, k, h, ret = 0;
+ int i, j, ret = 0;
const int n = showwaves->n;
- const int x = 255 / (nb_channels * n); /* multiplication factor, pre-computed to avoid in-loop divisions */
+ const int x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * n); /* multiplication factor, pre-computed to avoid in-loop divisions */
+ 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++) {
- if (!showwaves->outpicref) {
- showwaves->outpicref = outpicref =
- ff_get_video_buffer(outlink, outlink->w, outlink->h);
- if (!outpicref)
- return AVERROR(ENOMEM);
- outpicref->width = outlink->w;
- outpicref->height = outlink->h;
- outpicref->pts = insamples->pts +
- av_rescale_q((p - (int16_t *)insamples->data[0]) / nb_channels,
- (AVRational){ 1, inlink->sample_rate },
- outlink->time_base);
- linesize = outpicref->linesize[0];
- for (j = 0; j < outlink->h; j++)
- memset(outpicref->data[0] + j * linesize, 0, outlink->w);
- }
- for (j = 0; j < nb_channels; j++) {
- int start, end;
- switch (showwaves->mode) {
- case MODE_POINT:
- h = showwaves->h/2 - av_rescale(*p++, showwaves->h/2, MAX_INT16);
- if (h >= 0 && h < outlink->h)
- *(outpicref->data[0] + showwaves->buf_idx + h * linesize) += x;
- break;
- case MODE_LINE:
- h = showwaves->h/2 - av_rescale(*p++, showwaves->h/2, MAX_INT16);
- start = showwaves->h/2;
- end = av_clip(h, 0, outlink->h-1);
- if (start > end) FFSWAP(int16_t, start, end);
- for (k = start; k < end; k++)
- *(outpicref->data[0] + showwaves->buf_idx + k * linesize) += x;
- break;
-
- case MODE_P2P:
- h = showwaves->h/2 - av_rescale(*p++, showwaves->h/2, MAX_INT16);
- if (h >= 0 && h < outlink->h) {
- *(outpicref->data[0] + showwaves->buf_idx + h * linesize) += x;
- if (showwaves->buf_idy[j] && h != showwaves->buf_idy[j]) {
- start = showwaves->buf_idy[j];
- end = av_clip(h, 0, outlink->h-1);
- if (start > end)
- FFSWAP(int16_t, start, end);
- for (k = start + 1; k < end; k++)
- *(outpicref->data[0] + showwaves->buf_idx + k * linesize) += x;
- }
- }
- break;
+ ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
+ if (ret < 0)
+ goto end;
+ outpicref = showwaves->outpicref;
- case MODE_CENTERED_LINE:
- h = av_rescale(abs(*p++), showwaves->h, UINT16_MAX);
- start = (showwaves->h - h) / 2;
- end = start + h;
- for (k = start; k < end; k++)
- *(outpicref->data[0] + showwaves->buf_idx + k * linesize) += x;
- break;
- }
- /* store current y coordinate for this channel */
- showwaves->buf_idy[j] = h;
+ for (j = 0; j < nb_channels; j++) {
+ uint8_t *buf = outpicref->data[0] + showwaves->buf_idx;
+ const int linesize = outpicref->linesize[0];
+ if (showwaves->split_channels)
+ buf += j*ch_height*linesize;
+ showwaves->draw_sample(buf, ch_height, linesize, *p++,
+ &showwaves->buf_idy[j], x);
}
showwaves->sample_count_mod++;
outpicref = showwaves->outpicref;
}
+end:
av_frame_free(&insamples);
return ret;
}
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
- .filter_frame = filter_frame,
+ .filter_frame = showwaves_filter_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),
.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_INT, {.i64 = 0}, 0, 1, FLAGS },
+ { 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