Added the possibility to take pictures (untested)
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parent
548caa5d5c
commit
8a37018d0c
113
src/camera.c
113
src/camera.c
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@ -47,8 +47,10 @@ struct _Camera
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int fd;
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struct v4l2_format format;
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char * buffer;
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size_t buffer_cnt;
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char * raw_buffer;
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size_t raw_buffer_cnt;
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unsigned char * rgb_buffer;
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size_t rgb_buffer_cnt;
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guint source;
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@ -81,11 +83,11 @@ static gboolean _camera_on_drawing_area_configure(GtkWidget * widget,
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GdkEventConfigure * event, gpointer data);
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static gboolean _camera_on_drawing_area_expose(GtkWidget * widget,
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GdkEventExpose * event, gpointer data);
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static gboolean _camera_on_open(gpointer data);
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static gboolean _camera_on_refresh(gpointer data);
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static void _camera_on_file_close(gpointer data);
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static void _camera_on_help_about(gpointer data);
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static gboolean _camera_on_open(gpointer data);
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static gboolean _camera_on_refresh(gpointer data);
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static void _camera_on_snapshot(gpointer data);
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/* constants */
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@ -115,6 +117,15 @@ static const DesktopMenubar _camera_menubar[] =
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};
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/* variables */
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static DesktopToolbar _camera_toolbar[] =
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{
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{ "Snapshot", G_CALLBACK(_camera_on_snapshot), "camera-photo", 0, 0,
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NULL },
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{ NULL, NULL, NULL, 0, 0, NULL }
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};
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/* public */
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/* functions */
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/* camera_new */
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@ -131,8 +142,10 @@ Camera * camera_new(char const * device)
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device = "/dev/video0";
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camera->device = string_new(device);
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camera->fd = -1;
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camera->buffer = NULL;
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camera->buffer_cnt = 0;
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camera->raw_buffer = NULL;
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camera->raw_buffer_cnt = 0;
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camera->rgb_buffer = NULL;
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camera->rgb_buffer_cnt = 0;
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camera->source = 0;
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camera->yuv_amp = 255;
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camera->gc = NULL;
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@ -160,8 +173,12 @@ Camera * camera_new(char const * device)
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/* menubar */
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widget = desktop_menubar_create(_camera_menubar, camera, group);
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gtk_box_pack_start(GTK_BOX(vbox), widget, FALSE, TRUE, 0);
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/* toolbar */
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widget = desktop_toolbar_create(_camera_toolbar, camera, group);
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gtk_widget_set_sensitive(GTK_WIDGET(_camera_toolbar[0].widget), FALSE);
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gtk_box_pack_start(GTK_BOX(vbox), widget, FALSE, TRUE, 0);
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#if GTK_CHECK_VERSION(2, 18, 0)
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/* errors */
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/* infobar */
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camera->infobar = gtk_info_bar_new_with_buttons(GTK_STOCK_CLOSE,
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GTK_RESPONSE_CLOSE, NULL);
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gtk_info_bar_set_message_type(GTK_INFO_BAR(camera->infobar),
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@ -205,7 +222,8 @@ void camera_delete(Camera * camera)
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g_source_remove(camera->source);
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if(camera->fd >= 0)
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close(camera->fd);
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free(camera->buffer);
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free(camera->raw_buffer);
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free(camera->rgb_buffer);
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string_delete(camera->device);
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object_delete(camera);
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}
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@ -276,7 +294,8 @@ static gboolean _camera_on_can_read(gpointer data)
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#endif
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camera->source = 0;
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/* FIXME no longer block on read() */
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if((s = read(camera->fd, camera->buffer, camera->buffer_cnt)) <= 0)
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if((s = read(camera->fd, camera->raw_buffer, camera->raw_buffer_cnt))
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<= 0)
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{
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/* this error can be ignored */
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if(errno == EAGAIN)
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@ -284,11 +303,13 @@ static gboolean _camera_on_can_read(gpointer data)
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close(camera->fd);
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camera->fd = -1;
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_camera_error(camera, strerror(errno), 1);
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gtk_widget_set_sensitive(GTK_WIDGET(_camera_toolbar[0].widget),
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FALSE);
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return FALSE;
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}
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() %lu %ld\n", __func__,
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camera->buffer_cnt, s);
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camera->raw_buffer_cnt, s);
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#endif
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camera->source = g_idle_add(_camera_on_refresh, camera);
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return FALSE;
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@ -411,6 +432,7 @@ static gboolean _camera_on_open(gpointer data)
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camera->format.fmt.pix.width,
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camera->format.fmt.pix.height);
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#endif
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gtk_widget_set_sensitive(GTK_WIDGET(_camera_toolbar[0].widget), TRUE);
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gtk_widget_set_size_request(camera->area, camera->format.fmt.pix.width,
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camera->format.fmt.pix.height);
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/* FIXME register only if can really be read */
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@ -458,18 +480,18 @@ static int _open_setup(Camera * camera)
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return -error_set_code(1, "%s: %s", camera->device,
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"Unsupported video capture type");
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/* FIXME try to obtain a RGB24 format if possible */
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if((p = realloc(camera->buffer, camera->format.fmt.pix.sizeimage))
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if((p = realloc(camera->raw_buffer, camera->format.fmt.pix.sizeimage))
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== NULL)
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return -error_set_code(1, "%s: %s", camera->device,
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strerror(errno));
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camera->buffer = p;
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camera->buffer_cnt = camera->format.fmt.pix.sizeimage;
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camera->raw_buffer = p;
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camera->raw_buffer_cnt = camera->format.fmt.pix.sizeimage;
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return 0;
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}
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/* camera_on_refresh */
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static void _refresh_convert(Camera * camera, unsigned char * buf);
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static void _refresh_convert(Camera * camera);
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static void _refresh_convert_yuv(int amp, uint8_t y, uint8_t u, uint8_t v,
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uint8_t * r, uint8_t * g, uint8_t * b);
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@ -477,19 +499,16 @@ static gboolean _camera_on_refresh(gpointer data)
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{
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Camera * camera = data;
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GtkAllocation * allocation = &camera->area_allocation;
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/* XXX pre-allocate this buffer */
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unsigned char buf[camera->format.fmt.pix.width
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* camera->format.fmt.pix.height * 3];
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#ifdef DEBUG
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fprintf(stderr, "DEBUG: %s() 0x%x\n", __func__,
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camera->format.fmt.pix.pixelformat);
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#endif
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camera->source = 0;
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_refresh_convert(camera, buf);
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_refresh_convert(camera);
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gdk_draw_rgb_image(camera->pixmap, camera->gc, 0, 0, allocation->width,
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allocation->height, GDK_RGB_DITHER_NORMAL,
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buf, camera->format.fmt.pix.width * 3);
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camera->rgb_buffer, camera->format.fmt.pix.width * 3);
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gtk_widget_queue_draw_area(camera->area, 0, 0,
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camera->area_allocation.width,
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camera->area_allocation.height);
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@ -497,7 +516,7 @@ static gboolean _camera_on_refresh(gpointer data)
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return FALSE;
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}
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static void _refresh_convert(Camera * camera, unsigned char * buf)
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static void _refresh_convert(Camera * camera)
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{
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size_t i;
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size_t j;
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@ -505,23 +524,25 @@ static void _refresh_convert(Camera * camera, unsigned char * buf)
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switch(camera->format.fmt.pix.pixelformat)
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{
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case V4L2_PIX_FMT_YUYV:
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for(i = 0, j = 0; i + 3 < camera->buffer_cnt;
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for(i = 0, j = 0; i + 3 < camera->raw_buffer_cnt;
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i += 4, j += 6)
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{
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/* pixel 0 */
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_refresh_convert_yuv(camera->yuv_amp,
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camera->buffer[i],
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camera->buffer[i + 1],
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camera->buffer[i + 3],
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&buf[j + 2], &buf[j + 1],
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&buf[j]);
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camera->raw_buffer[i],
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camera->raw_buffer[i + 1],
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camera->raw_buffer[i + 3],
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&camera->rgb_buffer[j + 2],
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&camera->rgb_buffer[j + 1],
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&camera->rgb_buffer[j]);
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/* pixel 1 */
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_refresh_convert_yuv(camera->yuv_amp,
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camera->buffer[i + 2],
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camera->buffer[i + 1],
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camera->buffer[i + 3],
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&buf[j + 5], &buf[j + 4],
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&buf[j + 3]);
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camera->raw_buffer[i + 2],
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camera->raw_buffer[i + 1],
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camera->raw_buffer[i + 3],
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&camera->rgb_buffer[j + 5],
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&camera->rgb_buffer[j + 4],
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&camera->rgb_buffer[j + 3]);
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}
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break;
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default:
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@ -547,3 +568,31 @@ static void _refresh_convert_yuv(int amp, uint8_t y, uint8_t u, uint8_t v,
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*g = (dg < 0) ? 0 : ((dg > 255) ? 255 : dg);
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*b = (db < 0) ? 0 : ((db > 255) ? 255 : db);
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}
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/* camera_on_snapshot */
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static void _camera_on_snapshot(gpointer data)
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{
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Camera * camera = data;
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GdkPixbuf * pixbuf;
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GError * error = NULL;
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if((pixbuf = gdk_pixbuf_new_from_data(camera->rgb_buffer,
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GDK_COLORSPACE_RGB, FALSE, 8,
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camera->area_allocation.width,
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camera->area_allocation.height,
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camera->area_allocation.width * 3,
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NULL, NULL)) == NULL)
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{
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_camera_error(camera, "Could not save picture", 1);
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return;
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}
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if(gdk_pixbuf_save(pixbuf, "Snapshot.png", "png", &error, NULL)
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!= TRUE)
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{
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error_set("%s (%s)", "Could not save picture", error->message);
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_camera_error(camera, error_get(), 1);
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g_error_free(error);
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}
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g_object_unref(pixbuf);
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}
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