[vlc-devel] [PATCH] New 3D OpenGL audio spectrum visualization.
Adrien Maglo
magsoft at videolan.org
Mon Jul 29 11:42:13 CEST 2013
---
NEWS | 3 +
configure.ac | 10 +
modules/LIST | 1 +
modules/visualization/Modules.am | 2 +
modules/visualization/glspectrum.c | 545 +++++++++++++++++++++++++++++++++++++
src/audio_output/filters.c | 3 +-
src/audio_output/output.c | 7 +
7 files changed, 570 insertions(+), 1 deletion(-)
create mode 100644 modules/visualization/glspectrum.c
diff --git a/NEWS b/NEWS
index 735fc9d..3f637a8 100644
--- a/NEWS
+++ b/NEWS
@@ -8,6 +8,9 @@ Access:
Video Output:
* Direct rendering and filtering for VDPAU hardware acceleration
+Visualizations:
+ * Add a 3D OpenGL spectrum visualization.
+
Removed modules:
* ios video output: use ios2
diff --git a/configure.ac b/configure.ac
index eb712fdd..133bbdf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3933,6 +3933,16 @@ AS_IF([test "${enable_atmo}" != no], [
])
])
+dnl
+dnl glSpectrum
+dnl
+AC_ARG_ENABLE(glspectrum,
+ [ --enable-glspectrum 3D OpenGL spectrum visualization (default auto)])
+if test "${enable_glspectrum}" != "no" && test "${have_gl}" = "yes"
+then
+ VLC_ADD_PLUGIN([glspectrum])
+ VLC_ADD_LIBS([glspectrum],[$GL_LIBS])
+fi
EXTEND_HELP_STRING([Service Discovery plugins:])
dnl
diff --git a/modules/LIST b/modules/LIST
index abd3d26..47ed7ac 100644
--- a/modules/LIST
+++ b/modules/LIST
@@ -140,6 +140,7 @@ $Id$
* gles1: OpenGL ES video output using the generic OpenGL provider
* gles2: OpenGL ES2 video output using the generic OpenGL provider
* globalhotkeys: module to catch hotkeys when application doesn't have the focus
+ * glspectrum: 3D OpenGL spectrum visualization
* glwin32: a opengl provider using DirectX OpenGL
* glx: GLX extension for OpenGL
* gme: old console games music playback using Game Music Emu
diff --git a/modules/visualization/Modules.am b/modules/visualization/Modules.am
index af03750..cdd2119 100644
--- a/modules/visualization/Modules.am
+++ b/modules/visualization/Modules.am
@@ -10,3 +10,5 @@ libvisual_plugin_la_LIBADD = $(AM_LIBADD) $(LIBM)
libvlc_LTLIBRARIES += libvisual_plugin.la
SOURCES_vsxu = vsxu.cpp cyclic_buffer.h
+
+SOURCES_glspectrum = glspectrum.c visual/fft.c visual/fft.h
diff --git a/modules/visualization/glspectrum.c b/modules/visualization/glspectrum.c
new file mode 100644
index 0000000..bd41ee2
--- /dev/null
+++ b/modules/visualization/glspectrum.c
@@ -0,0 +1,545 @@
+/*****************************************************************************
+ * glspectrum.c: spectrum visualization module based on OpenGL
+ *****************************************************************************
+ * Copyright © 2009-2013 VLC authors and VideoLAN
+ *
+ * Authors: Adrien Maglo <magsoft at videolan.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_aout.h>
+#include <vlc_vout.h>
+#include <vlc_vout_wrapper.h>
+#include <vlc_opengl.h>
+#include <vlc_filter.h>
+#include <vlc_rand.h>
+
+#include <GL/gl.h>
+
+#include <math.h>
+
+#include "visual/fft.h"
+
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open(vlc_object_t *);
+static void Close(vlc_object_t *);
+
+#define WIDTH_TEXT N_("Video width")
+#define WIDTH_LONGTEXT N_("The width of the visualization window, in pixels.")
+
+#define HEIGHT_TEXT N_("Video height")
+#define HEIGHT_LONGTEXT N_("The height of the visualization window, in pixels.")
+
+vlc_module_begin()
+ set_shortname(N_("glSpectrum"))
+ set_description(N_("3D OpenGL spectrum visualization"))
+ set_capability("visualization", 0)
+ set_category(CAT_AUDIO)
+ set_subcategory(SUBCAT_AUDIO_VISUAL)
+
+ add_integer("glspectrum-width", 400, WIDTH_TEXT, WIDTH_LONGTEXT, false)
+ add_integer("glspectrum-height", 300, HEIGHT_TEXT, HEIGHT_LONGTEXT, false)
+
+ add_shortcut("glspectrum")
+ set_callbacks(Open, Close)
+vlc_module_end()
+
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+struct filter_sys_t
+{
+ vlc_thread_t thread;
+ vlc_sem_t ready;
+ bool b_error;
+
+ /* Audio data */
+ unsigned i_channels;
+ block_fifo_t *fifo;
+ unsigned i_prev_nb_samples;
+ int16_t *p_prev_s16_buff;
+
+ /* Opengl */
+ vout_thread_t *p_vout;
+ vout_display_t *p_vd;
+
+ float f_rotationAngle;
+ float f_rotationIncrement;
+
+ /* Window size */
+ int i_width;
+ int i_height;
+};
+
+
+static block_t *DoWork(filter_t *, block_t *);
+static void *Thread(void *);
+
+#define SPECTRUM_WIDTH 4.0
+#define NB_BANDS 20
+#define ROTATION_INCREMENT 0.1
+#define BAR_DECREMENT 0.075
+#define ROTATION_MAX 20
+
+const GLfloat lightZeroColor[] = {1.0f, 1.0f, 1.0f, 1.0f};
+const GLfloat lightZeroPosition[] = {0.0f, 3.0f, 10.0f, 0.0f};
+
+/**
+ * Open the module.
+ * @param p_this: the filter object
+ * @return VLC_SUCCESS or vlc error codes
+ */
+static int Open(vlc_object_t * p_this)
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys;
+
+ p_sys = p_filter->p_sys = (filter_sys_t*)malloc(sizeof(*p_sys));
+ if (p_sys == NULL)
+ return VLC_ENOMEM;
+
+ /* Create the object for the thread */
+ vlc_sem_init(&p_sys->ready, 0);
+ p_sys->b_error = false;
+ p_sys->i_width = var_InheritInteger(p_filter, "glspectrum-width");
+ p_sys->i_height = var_InheritInteger(p_filter, "glspectrum-height");
+ p_sys->i_channels = aout_FormatNbChannels(&p_filter->fmt_in.audio);
+ p_sys->p_prev_s16_buff = NULL;
+
+ p_sys->f_rotationAngle = 0;
+ p_sys->f_rotationIncrement = ROTATION_INCREMENT;
+
+ /* Create the FIFO for the audio data. */
+ p_sys->fifo = block_FifoNew();
+ if (p_sys->fifo == NULL)
+ goto error;
+
+ /* Create the thread */
+ if (vlc_clone(&p_sys->thread, Thread, p_filter,
+ VLC_THREAD_PRIORITY_VIDEO))
+ goto error;
+
+ /* Wait for the displaying thread to be ready. */
+ vlc_sem_wait(&p_sys->ready);
+ if (p_sys->b_error)
+ {
+ vlc_join(p_sys->thread, NULL);
+ goto error;
+ }
+
+ p_filter->fmt_in.audio.i_format = VLC_CODEC_FL32;
+ p_filter->fmt_out.audio = p_filter->fmt_in.audio;
+ p_filter->pf_audio_filter = DoWork;
+
+ return VLC_SUCCESS;
+
+error:
+ vlc_sem_destroy(&p_sys->ready);
+ free(p_sys);
+ return VLC_EGENERIC;
+}
+
+
+/**
+ * Close the module.
+ * @param p_this: the filter object
+ */
+static void Close(vlc_object_t *p_this)
+{
+ filter_t *p_filter = (filter_t *)p_this;
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ /* Terminate the thread. */
+ vlc_cancel(p_sys->thread);
+ vlc_join(p_sys->thread, NULL);
+
+ /* Free the ressources */
+ vout_DeleteDisplay(p_sys->p_vd, NULL);
+ vlc_object_release(p_sys->p_vout);
+
+ block_FifoRelease(p_sys->fifo);
+ free(p_sys->p_prev_s16_buff);
+
+ vlc_sem_destroy(&p_sys->ready);
+ free(p_sys);
+}
+
+
+/**
+ * Do the actual work with the new sample.
+ * @param p_filter: filter object
+ * @param p_in_buf: input buffer
+ */
+static block_t *DoWork(filter_t *p_filter, block_t *p_in_buf)
+{
+ block_t *block = block_Duplicate(p_in_buf);
+ if (likely(block != NULL))
+ block_FifoPut(p_filter->p_sys->fifo, block);
+ return p_in_buf;
+}
+
+
+/**
+ * Init the OpenGL scene.
+ **/
+static void initOpenGLScene()
+{
+ glEnable(GL_CULL_FACE);
+ glEnable(GL_DEPTH_TEST);
+ glDepthMask(GL_TRUE);
+
+ glMatrixMode(GL_PROJECTION);
+ glFrustum(-1.0f, 1.0f, -1.0f, 1.0f, 0.5f, 10.0f);
+
+ glMatrixMode(GL_MODELVIEW);
+ glTranslatef(0.0, -2.0, -2.0);
+
+ // Init the light.
+ glEnable(GL_LIGHTING);
+
+ glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
+ glEnable(GL_COLOR_MATERIAL);
+
+ glEnable(GL_LIGHT0);
+ glLightfv(GL_LIGHT0, GL_DIFFUSE, lightZeroColor);
+ glLightfv(GL_LIGHT0, GL_POSITION, lightZeroPosition);
+
+ glShadeModel(GL_SMOOTH);
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+
+
+/**
+ * Draw one bar of the Spectrum.
+ */
+static void drawBar()
+{
+ const float w = SPECTRUM_WIDTH / NB_BANDS - 0.05;
+
+ const GLfloat vertexCoords[] = {
+ 0.0, 0.0, 0.0, w, 0.0, 0.0, 0.0, 1.0, 0.0,
+ 0.0, 1.0, 0.0, w, 0.0, 0.0, w , 1.0, 0.0,
+
+ 0.0, 0.0, -w, 0.0, 0.0, 0.0, 0.0, 1.0, -w,
+ 0.0, 1.0, -w, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0,
+
+ w, 0.0, 0.0, w, 0.0, -w, w, 1.0, 0.0,
+ w, 1.0, 0.0, w, 0.0, -w, w, 1.0, -w,
+
+ w, 0.0, -w, 0.0, 0.0, -w, 0.0, 1.0, -w,
+ 0.0, 1.0, -w, w, 1.0, -w, w, 0.0, -w,
+
+ 0.0, 1.0, 0.0, w, 1.0, 0.0, w, 1.0, -w,
+ 0.0, 1.0, 0.0, w, 1.0, -w, 0.0, 1.0, -w,
+ };
+
+ const GLfloat normals[] = {
+ 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0,
+ 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0,
+
+ -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0,
+ -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0,
+
+ 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0,
+ 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0,
+
+ 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0,
+ 0.0, 0.0, -1.0, 0.0, 0.0, -1.0, 0.0, 0.0, -1.0,
+
+ 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0,
+ 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0,
+ };
+
+ glVertexPointer(3, GL_FLOAT, 0, vertexCoords);
+ glNormalPointer(GL_FLOAT, 0, normals);
+ glDrawArrays(GL_TRIANGLES, 0, 6 * 5);
+}
+
+
+/**
+ * Set the color of one bar of the spectrum.
+ * @param f_height the height of the bar.
+ */
+static void setBarColor(float f_height)
+{
+ float r, b;
+
+#define BAR_MAX_HEIGHT 4.2
+ r = -1.0 + 2 / BAR_MAX_HEIGHT * f_height;
+ b = 2.0 - 2 / BAR_MAX_HEIGHT * f_height;
+#undef BAR_MAX_HEIGHT
+
+ /* Test the ranges. */
+ r = r > 1.0 ? 1.0 : r;
+ b = b > 1.0 ? 1.0 : b;
+
+ r = r < 0.0 ? 0.0 : r;
+ b = b < 0.0 ? 0.0 : b;
+
+ /* Set the bar color. */
+ glColor4f(r, 0.0, b, 1.0);
+}
+
+
+/**
+ * Draw all the bars of the spectrum.
+ * @param heights the heights of all the bars.
+ */
+static void drawBars(float heights[])
+{
+ glPushMatrix();
+ glTranslatef(-2.0, 0.0, 0.0);
+
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_NORMAL_ARRAY);
+
+ float w = SPECTRUM_WIDTH / NB_BANDS;
+ for (unsigned i = 0; i < NB_BANDS; ++i)
+ {
+ glPushMatrix();
+ glScalef(1.0, heights[i], 1.0);
+ setBarColor(heights[i]);
+ drawBar();
+ glPopMatrix();
+
+ glTranslatef(w, 0.0, 0.0);
+ }
+
+ glDisableClientState(GL_VERTEX_ARRAY);
+ glDisableClientState(GL_NORMAL_ARRAY);
+
+ glPopMatrix();
+}
+
+
+/**
+ * Update thread which do the rendering
+ * @param p_this: the p_thread object
+ */
+static void *Thread( void *p_data )
+{
+ filter_t *p_filter = (filter_t*)p_data;
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ video_format_t fmt;
+ vlc_gl_t *gl;
+ unsigned int i_last_width = 0;
+ unsigned int i_last_height = 0;
+
+ /* Create the openGL provider */
+ p_sys->p_vout =
+ (vout_thread_t *)vlc_object_create(p_filter, sizeof(vout_thread_t));
+ if (!p_sys->p_vout)
+ goto error;
+
+ /* Configure the video format for the opengl provider. */
+ video_format_Init(&fmt, 0);
+ video_format_Setup(&fmt, VLC_CODEC_RGB32,
+ p_sys->i_width, p_sys->i_height, 0, 1 );
+ fmt.i_sar_num = 1;
+ fmt.i_sar_den = 1;
+
+ /* Init vout state. */
+ vout_display_state_t state;
+ memset(&state, 0, sizeof(state));
+ state.cfg.display.sar.num = 1;
+ state.cfg.display.sar.den = 1;
+ state.cfg.is_display_filled = true;
+ state.cfg.zoom.num = 1;
+ state.cfg.zoom.den = 1;
+ state.sar.num = 1;
+ state.sar.den = 1;
+
+ p_sys->p_vd = vout_NewDisplay(p_sys->p_vout, &fmt, &state,
+ "opengl", 1000000, 1000000);
+ if (!p_sys->p_vd)
+ {
+ vlc_object_release(p_sys->p_vout);
+ goto error;
+ }
+
+ gl = vout_GetDisplayOpengl(p_sys->p_vd);
+ if (!gl)
+ {
+ vout_DeleteDisplay(p_sys->p_vd, NULL);
+ vlc_object_release(p_sys->p_vout);
+ goto error;
+ }
+
+ vlc_sem_post(&p_sys->ready);
+
+ initOpenGLScene();
+
+ float height[NB_BANDS] = {0};
+
+ while (1)
+ {
+ block_t *block = block_FifoGet(p_sys->fifo);
+
+ int canc = vlc_savecancel();
+
+ /* Manage the events */
+ vout_ManageDisplay(p_sys->p_vd, true);
+ if (p_sys->p_vd->cfg->display.width != i_last_width ||
+ p_sys->p_vd->cfg->display.height != i_last_height)
+ {
+ /* FIXME it is not perfect as we will have black bands */
+ vout_display_place_t place;
+ vout_display_PlacePicture(&place, &p_sys->p_vd->source,
+ p_sys->p_vd->cfg, false);
+
+ i_last_width = p_sys->p_vd->cfg->display.width;
+ i_last_height = p_sys->p_vd->cfg->display.height;
+ }
+
+ /* Horizontal scale for 20-band equalizer */
+ const unsigned xscale[] = {0,1,2,3,4,5,6,7,8,11,15,20,27,
+ 36,47,62,82,107,141,184,255};
+
+ fft_state *p_state; /* internal FFT data */
+
+ unsigned i, j;
+ float p_output[FFT_BUFFER_SIZE]; /* Raw FFT Result */
+ int16_t p_buffer1[FFT_BUFFER_SIZE]; /* Buffer on which we perform
+ the FFT (first channel) */
+ int16_t p_dest[FFT_BUFFER_SIZE]; /* Adapted FFT result */
+ float *p_buffl = (float*)block->p_buffer; /* Original buffer */
+
+ int16_t *p_buffs; /* int16_t converted buffer */
+ int16_t *p_s16_buff; /* int16_t converted buffer */
+
+ /* Allocate the buffer only if the number of samples change */
+ if (block->i_nb_samples != p_sys->i_prev_nb_samples)
+ {
+ free(p_sys->p_prev_s16_buff);
+ p_sys->p_prev_s16_buff = malloc(block->i_nb_samples *
+ p_sys->i_channels *
+ sizeof(int16_t));
+ if (!p_sys->p_prev_s16_buff)
+ goto release;
+ p_sys->i_prev_nb_samples = block->i_nb_samples;
+ }
+ p_buffs = p_s16_buff = p_sys->p_prev_s16_buff;
+
+ /* Convert the buffer to int16_t
+ Pasted from float32tos16.c */
+ for (i = block->i_nb_samples * p_sys->i_channels; i--;)
+ {
+ union {float f; int32_t i;} u;
+
+ u.f = *p_buffl + 384.0;
+ if (u.i > 0x43c07fff)
+ *p_buffs = 32767;
+ else if (u.i < 0x43bf8000)
+ *p_buffs = -32768;
+ else
+ *p_buffs = u.i - 0x43c00000;
+
+ p_buffl++; p_buffs++;
+ }
+ p_state = visual_fft_init();
+ if (!p_state)
+ {
+ msg_Err(p_filter,"unable to initialize FFT transform");
+ goto release;
+ }
+ p_buffs = p_s16_buff;
+ for (i = 0 ; i < FFT_BUFFER_SIZE; i++)
+ {
+ p_output[i] = 0;
+ p_buffer1[i] = *p_buffs;
+
+ p_buffs += p_sys->i_channels;
+ if (p_buffs >= &p_s16_buff[block->i_nb_samples * p_sys->i_channels])
+ p_buffs = p_s16_buff;
+ }
+ fft_perform (p_buffer1, p_output, p_state);
+
+ for (i = 0; i< FFT_BUFFER_SIZE; ++i)
+ p_dest[i] = p_output[i] * (2 ^ 16)
+ / ((FFT_BUFFER_SIZE / 2 * 32768) ^ 2);
+
+ for (i = 0 ; i < NB_BANDS; i++)
+ {
+ /* Decrease the previous size of the bar. */
+ height[i] -= BAR_DECREMENT;
+ if (height[i] < 0)
+ height[i] = 0;
+
+ int y = 0;
+ /* We search the maximum on one scale
+ to determine the current size of the bar. */
+ for (j = xscale[i]; j < xscale[i + 1]; j++)
+ {
+ if (p_dest[j] > y)
+ y = p_dest[j];
+ }
+ /* Calculate the height of the bar */
+ float new_height = y != 0 ? log(y) * 0.4 : 0;
+ height[i] = new_height > height[i]
+ ? new_height : height[i];
+ }
+
+ /* Determine the camera rotation angle. */
+ p_sys->f_rotationAngle += p_sys->f_rotationIncrement;
+ if (p_sys->f_rotationAngle <= -ROTATION_MAX)
+ p_sys->f_rotationIncrement = ROTATION_INCREMENT;
+ else if (p_sys->f_rotationAngle >= ROTATION_MAX)
+ p_sys->f_rotationIncrement = -ROTATION_INCREMENT;
+
+ /* Render the frame. */
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+ glRotatef(p_sys->f_rotationAngle, 0, 1, 0);
+ drawBars(height);
+ glPopMatrix();
+
+ /* Wait to swapp the frame on time. */
+ mwait(block->i_pts + (block->i_length / 2));
+ if (!vlc_gl_Lock(gl))
+ {
+ vlc_gl_Swap(gl);
+ vlc_gl_Unlock(gl);
+ }
+
+release:
+ block_Release(block);
+ vlc_restorecancel(canc);
+ }
+
+ assert(0);
+
+error:
+ p_sys->b_error = true;
+ vlc_sem_post(&p_sys->ready);
+ return NULL;
+}
+
diff --git a/src/audio_output/filters.c b/src/audio_output/filters.c
index ea451a3..796da1f 100644
--- a/src/audio_output/filters.c
+++ b/src/audio_output/filters.c
@@ -296,7 +296,8 @@ static int VisualizationCallback (vlc_object_t *obj, const char *var,
* separate "visual" (external) and "audio-visual" (internal) variables...
* The visual plugin should have one submodule per effect instead. */
if (strcasecmp (mode, "none") && strcasecmp (mode, "goom")
- && strcasecmp (mode, "projectm") && strcasecmp (mode, "vsxu"))
+ && strcasecmp (mode, "projectm") && strcasecmp (mode, "vsxu")
+ && strcasecmp (mode, "glspectrum"))
{
var_Create (obj, "effect-list", VLC_VAR_STRING);
var_SetString (obj, "effect-list", mode);
diff --git a/src/audio_output/output.c b/src/audio_output/output.c
index 185eee6..18fee05 100644
--- a/src/audio_output/output.c
+++ b/src/audio_output/output.c
@@ -252,6 +252,13 @@ audio_output_t *aout_New (vlc_object_t *parent)
text.psz_string = (char*)"Vovoid VSXu";
var_Change (aout, "visual", VLC_VAR_ADDCHOICE, &val, &text);
}
+ /* Look for glspectrum plugin */
+ if (module_exists ("glspectrum"))
+ {
+ val.psz_string = (char *)"glspectrum";
+ text.psz_string = (char*)"3D spectrum";
+ var_Change (aout, "visual", VLC_VAR_ADDCHOICE, &val, &text);
+ }
str = var_GetNonEmptyString (aout, "effect-list");
if (str != NULL)
{
--
1.8.1.2
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