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v4l2videodec: Create one element per device
For each videoCdevice probe it input/output capabilities if it match with video decoder requirement register a new element. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> https://bugzilla.gnome.org/show_bug.cgi?id=722128
This commit is contained in:
Benjamin Gaignard
Nicolas Dufresne
parent
bd51c37196
commit
2a870d7d9b
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@ -52,8 +52,7 @@ plugin_init (GstPlugin * plugin)
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GST_TYPE_V4L2SINK) ||
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!gst_element_register (plugin, "v4l2radio", GST_RANK_NONE,
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GST_TYPE_V4L2RADIO) ||
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!gst_element_register (plugin, "v4l2videodec", GST_RANK_PRIMARY + 1,
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GST_TYPE_V4L2_VIDEO_DEC) ||
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!gst_v4l2_video_dec_register (plugin) ||
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/* !gst_element_register (plugin, "v4l2jpegsrc", */
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/* GST_RANK_NONE, GST_TYPE_V4L2JPEGSRC) || */
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/* !gst_element_register (plugin, "v4l2mjpegsrc", */
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@ -1457,7 +1457,7 @@ gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
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return format;
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}
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static GstStructure *
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GstStructure *
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gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
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{
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GstStructure *structure = NULL;
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@ -283,6 +283,8 @@ gboolean gst_v4l2_object_setup_format (GstV4l2Object * v4l2object,
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gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * v4l2object,
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GstQuery * query);
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GstStructure * gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc);
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#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
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\
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@ -23,22 +23,35 @@
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#include "config.h"
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#endif
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include "gstv4l2videodec.h"
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#include "v4l2_calls.h"
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#include <string.h>
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#include <gst/gst-i18n-plugin.h>
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#define DEFAULT_PROP_DEVICE "/dev/video8"
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#define DEFAULT_PROP_DEVICE "/dev/video0"
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#define V4L2_VIDEO_DEC_QUARK \
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g_quark_from_static_string("gst-v4l2-video-dec-info")
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GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_dec_debug);
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#define GST_CAT_DEFAULT gst_v4l2_video_dec_debug
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#define parent_class gst_v4l2_video_dec_parent_class
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G_DEFINE_TYPE (GstV4l2VideoDec, gst_v4l2_video_dec, GST_TYPE_VIDEO_DECODER);
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static gboolean gst_v4l2_video_dec_flush (GstVideoDecoder * decoder);
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typedef struct
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{
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gchar *device;
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GstCaps *sink_caps;
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GstCaps *src_caps;
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} Gstv4l2VideoDecQData;
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enum
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{
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PROP_0,
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@ -46,6 +59,40 @@ enum
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PROP_CAPTURE_IO_MODE,
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};
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static void gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass);
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static void gst_v4l2_video_dec_init (GstV4l2VideoDec * self, gpointer g_class);
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static void gst_v4l2_video_dec_base_init (gpointer g_class);
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static GstVideoDecoderClass *parent_class = NULL;
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GType
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gst_v4l2_video_dec_get_type (void)
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{
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static volatile gsize type = 0;
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if (g_once_init_enter (&type)) {
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GType _type;
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static const GTypeInfo info = {
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sizeof (GstV4l2VideoDecClass),
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gst_v4l2_video_dec_base_init,
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NULL,
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(GClassInitFunc) gst_v4l2_video_dec_class_init,
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NULL,
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NULL,
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sizeof (GstV4l2VideoDec),
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0,
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(GInstanceInitFunc) gst_v4l2_video_dec_init,
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NULL
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};
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_type = g_type_register_static (GST_TYPE_VIDEO_DECODER, "GstV4l2VideoDec",
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&info, 0);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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static void
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gst_v4l2_video_dec_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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@ -432,8 +479,8 @@ gst_v4l2_video_dec_handle_frame (GstVideoDecoder * decoder,
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GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
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gst_v4l2_object_unlock_stop (self->v4l2output);
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ret =
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gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->v4l2output->
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pool), codec_data);
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gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
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v4l2output->pool), codec_data);
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gst_v4l2_object_unlock (self->v4l2output);
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GST_VIDEO_DECODER_STREAM_LOCK (decoder);
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@ -664,25 +711,52 @@ gst_v4l2_video_dec_finalize (GObject * object)
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}
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static void
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gst_v4l2_video_dec_init (GstV4l2VideoDec * self)
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gst_v4l2_video_dec_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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Gstv4l2VideoDecQData *qdata;
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GstPadTemplate *templ;
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qdata = g_type_get_qdata (G_TYPE_FROM_CLASS (g_class), V4L2_VIDEO_DEC_QUARK);
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if (!qdata)
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return;
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templ =
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gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
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qdata->sink_caps);
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gst_element_class_add_pad_template (element_class, templ);
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templ =
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gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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qdata->src_caps);
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gst_element_class_add_pad_template (element_class, templ);
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}
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static void
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gst_v4l2_video_dec_init (GstV4l2VideoDec * self, gpointer g_class)
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{
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GstVideoDecoder *decoder = (GstVideoDecoder *) self;
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Gstv4l2VideoDecQData *qdata;
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qdata = g_type_get_qdata (G_TYPE_FROM_CLASS (g_class), V4L2_VIDEO_DEC_QUARK);
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if (!qdata)
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return;
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gst_video_decoder_set_packetized (decoder, TRUE);
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self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
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V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
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V4L2_BUF_TYPE_VIDEO_OUTPUT, qdata->device,
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gst_v4l2_get_output, gst_v4l2_set_output, NULL);
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self->v4l2output->no_initial_format = TRUE;
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self->v4l2output->keep_aspect = FALSE;
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self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
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V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
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V4L2_BUF_TYPE_VIDEO_CAPTURE, qdata->device,
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gst_v4l2_get_input, gst_v4l2_set_input, NULL);
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self->v4l2capture->no_initial_format = TRUE;
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self->v4l2output->keep_aspect = FALSE;
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g_object_set (self, "device", DEFAULT_PROP_DEVICE, NULL);
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g_object_set (self, "device", qdata->device, NULL);
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}
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static void
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@ -692,18 +766,12 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
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GObjectClass *gobject_class;
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GstVideoDecoderClass *video_decoder_class;
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parent_class = g_type_class_peek_parent (klass);
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element_class = (GstElementClass *) klass;
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gobject_class = (GObjectClass *) klass;
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video_decoder_class = (GstVideoDecoderClass *) klass;
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gst_element_class_add_pad_template (element_class,
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gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
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gst_v4l2_object_get_codec_caps ()));
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gst_element_class_add_pad_template (element_class,
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gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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gst_v4l2_object_get_raw_caps ()));
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gst_element_class_set_static_metadata (element_class,
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"V4L2 Video Decoder",
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"Codec/Decoder/Video",
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@ -742,7 +810,6 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
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element_class->change_state =
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GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_change_state);
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gst_v4l2_object_install_properties_helper (gobject_class,
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DEFAULT_PROP_DEVICE);
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@ -756,7 +823,121 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
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"Capture I/O mode",
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GST_TYPE_V4L2_IO_MODE, GST_V4L2_IO_AUTO,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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/* Probing functions */
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static GstCaps *
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gst_v4l2_video_dec_probe_caps (gchar * device, gint video_fd,
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enum v4l2_buf_type type, GstCaps * filter)
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{
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gint n;
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struct v4l2_fmtdesc format;
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GstCaps *ret, *caps;
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GST_DEBUG ("Getting %s format enumerations", device);
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caps = gst_caps_new_empty ();
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for (n = 0;; n++) {
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GstStructure *template;
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format.index = n;
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format.type = type;
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if (v4l2_ioctl (video_fd, VIDIOC_ENUM_FMT, &format) < 0)
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break; /* end of enumeration */
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GST_LOG ("index: %u", format.index);
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GST_LOG ("type: %d", format.type);
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GST_LOG ("flags: %08x", format.flags);
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GST_LOG ("description: '%s'", format.description);
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GST_LOG ("pixelformat: %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (format.pixelformat));
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template = gst_v4l2_object_v4l2fourcc_to_structure (format.pixelformat);
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if (template)
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gst_caps_append_structure (caps, template);
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}
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caps = gst_caps_simplify (caps);
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ret = gst_caps_intersect (filter, caps);
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gst_caps_unref (filter);
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gst_caps_unref (caps);
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return ret;
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}
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gboolean
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gst_v4l2_video_dec_register (GstPlugin * plugin)
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{
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gint i = -1;
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gchar *device = NULL;
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GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
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"V4L2 Video Decoder");
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while (TRUE) {
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GstCaps *src_caps, *sink_caps;
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gint video_fd;
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g_free (device);
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device = g_strdup_printf ("/dev/video%d", ++i);
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if (!g_file_test (device, G_FILE_TEST_EXISTS))
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break;
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video_fd = open (device, O_RDWR);
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if (video_fd == -1) {
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GST_WARNING ("Failed to open %s", device);
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continue;
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}
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/* get sink supported format (no MPLANE for codec) */
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sink_caps = gst_v4l2_video_dec_probe_caps (device, video_fd,
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V4L2_BUF_TYPE_VIDEO_OUTPUT, gst_v4l2_object_get_codec_caps ());
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/* get src supported format */
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src_caps = gst_caps_merge (gst_v4l2_video_dec_probe_caps (device, video_fd,
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V4L2_BUF_TYPE_VIDEO_CAPTURE, gst_v4l2_object_get_raw_caps ()),
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gst_v4l2_video_dec_probe_caps (device, video_fd,
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V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
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gst_v4l2_object_get_raw_caps ()));
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if (!gst_caps_is_empty (sink_caps) && !gst_caps_is_empty (src_caps)) {
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GTypeQuery type_query;
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GTypeInfo type_info = { 0, };
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GType type, subtype;
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gchar *type_name;
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Gstv4l2VideoDecQData *qdata;
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type = gst_v4l2_video_dec_get_type ();
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g_type_query (type, &type_query);
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memset (&type_info, 0, sizeof (type_info));
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type_info.class_size = type_query.class_size;
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type_info.instance_size = type_query.instance_size;
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type_name = g_strdup_printf ("v4l2video%ddec", i);
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subtype = g_type_register_static (type, type_name, &type_info, 0);
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qdata = g_new0 (Gstv4l2VideoDecQData, 1);
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qdata->device = g_strdup (device);
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qdata->sink_caps = gst_caps_ref (sink_caps);
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qdata->src_caps = gst_caps_ref (src_caps);
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g_type_set_qdata (subtype, V4L2_VIDEO_DEC_QUARK, qdata);
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gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype);
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g_free (type_name);
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}
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close (video_fd);
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gst_caps_unref (src_caps);
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gst_caps_unref (sink_caps);
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}
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g_free (device);
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return TRUE;
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}
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@ -76,6 +76,8 @@ struct _GstV4l2VideoDecClass
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GType gst_v4l2_video_dec_get_type (void);
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gboolean gst_v4l2_video_dec_register (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_V4L2_VIDEO_DEC_H__ */
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