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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-04-04 15:19:57 +00:00
androidcamera: Add caps negotiation support
This commit is contained in:
Youness Alaoui
Nicolas Dufresne
parent
bb83c54a87
commit
25896c5ab7
2 changed files with 155 additions and 47 deletions
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@ -37,6 +37,8 @@ static void gst_ahc_src_dispose (GObject * object);
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static GstStateChangeReturn gst_ahc_src_change_state (GstElement * element,
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GstStateChange transition);
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static GstCaps *gst_ahc_src_getcaps (GstBaseSrc * src);
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static gboolean gst_ahc_src_setcaps (GstBaseSrc * src, GstCaps * caps);
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static void gst_ahc_src_fixate (GstBaseSrc * basesrc, GstCaps * caps);
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static gboolean gst_ahc_src_start (GstBaseSrc * bsrc);
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static gboolean gst_ahc_src_stop (GstBaseSrc * bsrc);
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static gboolean gst_ahc_src_unlock (GstBaseSrc * bsrc);
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@ -44,6 +46,8 @@ static gboolean gst_ahc_src_unlock_stop (GstBaseSrc * bsrc);
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static GstFlowReturn gst_ahc_src_create (GstPushSrc * src, GstBuffer ** buffer);
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static void gst_ahc_src_close (GstAHCSrc * self);
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static void gst_ahc_src_on_preview_frame (jbyteArray data, gpointer user_data);
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static void gst_ahc_src_on_error (int error, gpointer user_data);
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#define NUM_CALLBACK_BUFFERS 5
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@ -98,6 +102,8 @@ gst_ahc_src_class_init (GstAHCSrcClass * klass)
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element_class->change_state = gst_ahc_src_change_state;
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gstbasesrc_class->get_caps = gst_ahc_src_getcaps;
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gstbasesrc_class->set_caps = gst_ahc_src_setcaps;
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gstbasesrc_class->fixate = gst_ahc_src_fixate;
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gstbasesrc_class->start = gst_ahc_src_start;
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gstbasesrc_class->stop = gst_ahc_src_stop;
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gstbasesrc_class->unlock = gst_ahc_src_unlock;
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@ -124,7 +130,7 @@ gst_ahc_src_init (GstAHCSrc * self, GstAHCSrcClass * klass)
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self->texture = NULL;
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self->data = NULL;
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self->queue = gst_data_queue_new (_data_queue_check_full, NULL);
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self->caps = NULL;
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self->start = FALSE;
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}
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static void
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@ -297,6 +303,141 @@ gst_ahc_src_getcaps (GstBaseSrc * src)
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}
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}
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static void
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gst_ahc_src_fixate (GstBaseSrc * src, GstCaps * caps)
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{
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GstAHCSrc *self = GST_AHC_SRC (src);
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GstStructure *s = gst_caps_get_structure (caps, 0);
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const GValue *value;
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GST_WARNING_OBJECT (self, "Fixating : %s", gst_caps_to_string (caps));
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if (s) {
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value = gst_structure_get_value (s, "framerate");
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if (value) {
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const GValue *min, *max;
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gint n, d;
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min = gst_value_get_fraction_range_min (value);
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max = gst_value_get_fraction_range_max (value);
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if (min) {
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n = gst_value_get_fraction_numerator (min);
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d = gst_value_get_fraction_denominator (min);
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self->fps_min = n * 1000 / d;
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}
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if (max) {
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n = gst_value_get_fraction_numerator (max);
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d = gst_value_get_fraction_denominator (max);
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self->fps_max = n * 1000 / d;
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}
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GST_WARNING_OBJECT (self, "Fps : [%d, %d]", self->fps_min, self->fps_max);
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}
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}
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/* Let it fixate itself */
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}
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static gboolean
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gst_ahc_src_setcaps (GstBaseSrc * src, GstCaps * caps)
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{
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GstAHCSrc *self = GST_AHC_SRC (src);
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JNIEnv *env = gst_dvm_get_env ();
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gboolean ret = FALSE;
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GstAHCParameters *params = NULL;
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if (!self->camera) {
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GST_WARNING_OBJECT (self, "setcaps called without a camera available");
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goto end;
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}
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params = gst_ah_camera_get_parameters (self->camera);
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if (params) {
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GstVideoFormat format;
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gint fmt;
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gint width, height, fps_n, fps_d;
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gint i;
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if (!gst_video_format_parse_caps (caps, &format, &width, &height) ||
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!gst_video_parse_caps_framerate (caps, &fps_n, &fps_d)) {
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GST_WARNING_OBJECT (self, "unable to parse video caps");
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goto end;
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}
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fps_n *= 1000 / fps_d;
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if (fps_n < self->fps_min || fps_n > self->fps_max) {
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self->fps_min = self->fps_max = fps_n;
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}
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switch (format) {
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case GST_VIDEO_FORMAT_YV12:
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fmt = ImageFormat_YV12;
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break;
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case GST_VIDEO_FORMAT_NV21:
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fmt = ImageFormat_NV21;
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break;
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case GST_VIDEO_FORMAT_YUY2:
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fmt = ImageFormat_YUY2;
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break;
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case GST_VIDEO_FORMAT_RGB16:
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fmt = ImageFormat_RGB_565;
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break;
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/* GST_VIDEO_FORMAT_NV16 doesn't exist */
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//case GST_VIDEO_FORMAT_NV16:
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//fmt = ImageFormat_NV16;
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//break;
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default:
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fmt = ImageFormat_UNKNOWN;
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break;
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}
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if (fmt == ImageFormat_UNKNOWN) {
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GST_WARNING_OBJECT (self, "unsupported video format");
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goto end;
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}
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gst_ahc_parameters_set_preview_size (params, width, height);
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gst_ahc_parameters_set_preview_format (params, fmt);
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gst_ahc_parameters_set_preview_fps_range (params, self->fps_min,
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self->fps_max);
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GST_WARNING_OBJECT (self, "Setting camera parameters : %dx%d @ [%f, %f]",
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width, height, self->fps_min / 1000.0, self->fps_max / 1000.0);
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if (!gst_ah_camera_set_parameters (self->camera, params)) {
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GST_WARNING_OBJECT (self, "Unable to set video parameters");
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goto end;
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}
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self->width = width;
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self->height = height;
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self->format = fmt;
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self->buffer_size = width * height *
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((double) gst_ag_imageformat_get_bits_per_pixel (fmt) / 8);
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for (i = 0; i < NUM_CALLBACK_BUFFERS; i++) {
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jbyteArray array = (*env)->NewByteArray (env, self->buffer_size);
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gst_ah_camera_add_callback_buffer (self->camera, array);
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(*env)->DeleteLocalRef (env, array);
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}
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ret = TRUE;
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}
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end:
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if (params)
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gst_ahc_parameters_free (params);
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if (ret && self->start) {
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ret = gst_ah_camera_start_preview (self->camera);
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if (ret) {
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/* Need to reset callbacks after every startPreview */
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gst_ah_camera_set_preview_callback_with_buffer (self->camera,
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gst_ahc_src_on_preview_frame, self);
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gst_ah_camera_set_error_callback (self->camera, gst_ahc_src_on_error,
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self);
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self->start = FALSE;
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}
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}
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return ret;
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}
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static void
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gst_ahc_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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@ -401,8 +542,6 @@ gst_ahc_src_on_preview_frame (jbyteArray data, gpointer user_data)
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GST_BUFFER_DURATION (buffer) = duration;
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GST_BUFFER_TIMESTAMP (buffer) = timestamp;
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gst_buffer_set_caps (buffer, self->caps);
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item = g_slice_new0 (GstDataQueueItem);
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item->object = GST_MINI_OBJECT (buffer);
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item->size = GST_BUFFER_SIZE (buffer);
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@ -429,46 +568,10 @@ gst_ahc_src_open (GstAHCSrc * self)
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self->camera = gst_ah_camera_open (0);
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if (self->camera) {
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JNIEnv *env = gst_dvm_get_env ();
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GstAHCParameters *params;
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gint i;
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GST_WARNING_OBJECT (self, "Opened camera");
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self->texture = gst_ag_surfacetexture_new (0);
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gst_ah_camera_set_preview_texture (self->camera, self->texture);
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gst_ah_camera_set_error_callback (self->camera, gst_ahc_src_on_error, self);
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params = gst_ah_camera_get_parameters (self->camera);
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if (params) {
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GstAHCSize *size;
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GST_WARNING_OBJECT (self, "Params : %s",
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gst_ahc_parameters_flatten (params));
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gst_ahc_parameters_set_preview_size (params, 1280, 720);
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gst_ahc_parameters_set_preview_format (params, ImageFormat_YV12);
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GST_WARNING_OBJECT (self, "Setting new params (%d) : %s",
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gst_ah_camera_set_parameters (self->camera, params),
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gst_ahc_parameters_flatten (params));
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size = gst_ahc_parameters_get_preview_size (params);
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self->caps = gst_caps_new_simple ("video/x-raw-yuv",
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"format", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('Y', 'V', '1', '2'),
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"width", G_TYPE_INT, size->width,
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"height", G_TYPE_INT, size->height,
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"framerate", GST_TYPE_FRACTION, 30, 1, NULL);
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self->buffer_size = size->width * size->height *
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gst_ag_imageformat_get_bits_per_pixel
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(gst_ahc_parameters_get_preview_format (params)) / 8;
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gst_ahc_size_free (size);
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gst_ahc_parameters_free (params);
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}
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for (i = 0; i < NUM_CALLBACK_BUFFERS; i++) {
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jbyteArray array = (*env)->NewByteArray (env, self->buffer_size);
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gst_ah_camera_add_callback_buffer (self->camera, array);
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(*env)->DeleteLocalRef (env, array);
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}
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} else {
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GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
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("Unable to open device '%d'.", 0), GST_ERROR_SYSTEM);
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@ -552,13 +655,12 @@ gst_ahc_src_start (GstBaseSrc * bsrc)
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GST_WARNING_OBJECT (self, "Starting preview");
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if (self->camera) {
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gboolean ret = gst_ah_camera_start_preview (self->camera);
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if (ret) {
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self->previous_ts = GST_CLOCK_TIME_NONE;
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gst_ah_camera_set_preview_callback_with_buffer (self->camera,
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gst_ahc_src_on_preview_frame, self);
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}
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return ret;
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self->previous_ts = GST_CLOCK_TIME_NONE;
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self->fps_min = self->fps_max = self->width = self->height = 0;
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self->format = ImageFormat_UNKNOWN;
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self->start = TRUE;
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return TRUE;
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} else {
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return FALSE;
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}
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@ -572,6 +674,7 @@ gst_ahc_src_stop (GstBaseSrc * bsrc)
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GST_WARNING_OBJECT (self, "Stopping preview");
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if (self->camera) {
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gst_data_queue_flush (self->queue);
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self->start = FALSE;
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return gst_ah_camera_stop_preview (self->camera);
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}
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return TRUE;
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@ -51,11 +51,16 @@ struct _GstAHCSrc
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GstAHCamera *camera;
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GstAGSurfaceTexture *texture;
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GstCaps *caps;
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GList *data;
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GstDataQueue *queue;
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gint buffer_size;
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GstClockTime previous_ts;
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gint format;
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gint width;
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gint height;
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gint fps_min;
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gint fps_max;
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gboolean start;
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};
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struct _GstAHCSrcClass
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