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gstreamer/ext/avtp/meson.build

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avtp: AVTP plugin bootstrap code This patch introduces the bootstrap code from the AVTP plugin (plugin definition and init) as well as the build system files. Upcoming patches will introduce payloaders, source and sink elements provided by the AVTP plugin. These elements can be utilized by a GStreamer pipeline to implement TSN audio/video applications. Regarding the plugin build system files, both autotools and meson files are introduced. The AVTP plugin is landed in ext/ since it has an external dependency on libavtp, an opensource AVTP packetization library. For further information about libavtp check [1]. [1] https://github.com/AVnu/libavtp
2019-01-14 18:18:42 +00:00
avtp_sources = [
'gstavtp.c',
avtp: Introduce AAF depayloader element This patch introduces the AAF depayloader element, the counterpart from the AAF payloader. As expected, this element inputs AVTPDUs and outputs audio raw data and supports AAF PCM encapsulation only. The AAF depayloader srcpad produces a fixed format that is encoded within the AVTPDU. Once the first AVTPDU is received by the element, the audio features e.g. sample format, rate, number of channels, are decoded and the srcpad caps are set accordingly. Also, at this point, the element pushes a SEGMENT event downstream defining the segment according to the AVTP presentation time. All AVTP depayloaders will share some common code. For that reason, this patch introduces the GstAvtpBaseDepayload abstract class that implements common depayloader functionalities. AAF-specific functionalities are implemented in the derived class GstAvtpAafDepay.
2019-01-24 00:20:27 +00:00
'gstavtpaafdepay.c',
avtp: Introduce AAF payloader element This patch introduces the AVTP Audio Format (AAF) payloader element from the AVTP plugin. The element inputs audio raw data and outputs AVTP packets (aka AVTPDUs), implementing a typical protocol payloader element from GStreamer. AAF is one of the available formats to transport audio data in an AVTP system. AAF is specified in IEEE 1722-2016 section 7 and provides two encapsulation mode: PCM and AES3. This patch implements PCM encapsulation mode only. The AAF payloader working mechanism consists of building the AAF header, prepending it to the GstBuffer received on the sink pad, and pushing the buffer downstream. Payloader parameters such as stream ID, maximum transit time, time uncertainty, and timestamping mode are passed via element properties. AAF doesn't support all possible sample format and sampling rate values so the sink pad caps template from the payloader is a subset of audio/x-raw. Additionally, this patch implements only "normal" timestamping mode from AAF. "Sparse" mode should be implemented in future. Upcoming patches will introduce other AVTP payloader elements that will have some common code. For that reason, this patch introduces the GstAvtpBasePayload abstract class that implements common payloader functionalities, and the GstAvtpAafPay class that extends the GstAvtpBasePayload class, implementing AAF-specific functionalities. The AAF payloader element is most likely to be used with the AVTP sink element (to be introduced by a later patch) but it could also be used with UDP sink element to implement AVTP over UDP as described in IEEE 1722-2016 Annex J. This element was inspired by RTP payloader elements.
2019-01-17 01:16:59 +00:00
'gstavtpaafpay.c',
avtp: Introduce AVTP CVF payloader element This patch introduces the AVTP Compressed Video Format (CVF) payloader specified in IEEE 1722-2016 section 8. Currently, this payload only supports H.264 encapsulation described in section 8.5. Is also worth noting that only single NAL units are encapsulated: no aggregation or fragmentation is performed by the payloader. An interesting characteristic of CVF H.264 spec is that it defines an H264_TIMESTAMP, in addition to the AVTP timestamp. The later is translated to the GST_BUFFER_DTS while the former is translated to the GST_BUFFER_PTS. From AVTP CVF H.264 spec, it is clear that the AVTP timestamp is related to the decoding order, while the H264_TIMESTAMP is an ancillary information to the H.264 decoder. Upon receiving a buffer containing a group of NAL units, the avtpcvfpay element will extract each NAL unit and payload them into individual AVTP packets. The last AVTP packet generated for a group of NAL units will have the M bit set, so the depayloader is able to properly regroup them. The exact format of the buffer of NAL units is described on the 'codec_data' capability, which is parsed by the avtpcvfpay, in the same way done in rtph264pay. This patch reuses the infra provided by gstavtpbasepayload.c.
2019-02-28 23:49:02 +00:00
'gstavtpcvfpay.c',
avtp: Introduce AAF depayloader element This patch introduces the AAF depayloader element, the counterpart from the AAF payloader. As expected, this element inputs AVTPDUs and outputs audio raw data and supports AAF PCM encapsulation only. The AAF depayloader srcpad produces a fixed format that is encoded within the AVTPDU. Once the first AVTPDU is received by the element, the audio features e.g. sample format, rate, number of channels, are decoded and the srcpad caps are set accordingly. Also, at this point, the element pushes a SEGMENT event downstream defining the segment according to the AVTP presentation time. All AVTP depayloaders will share some common code. For that reason, this patch introduces the GstAvtpBaseDepayload abstract class that implements common depayloader functionalities. AAF-specific functionalities are implemented in the derived class GstAvtpAafDepay.
2019-01-24 00:20:27 +00:00
'gstavtpbasedepayload.c',
avtp: Introduce AAF payloader element This patch introduces the AVTP Audio Format (AAF) payloader element from the AVTP plugin. The element inputs audio raw data and outputs AVTP packets (aka AVTPDUs), implementing a typical protocol payloader element from GStreamer. AAF is one of the available formats to transport audio data in an AVTP system. AAF is specified in IEEE 1722-2016 section 7 and provides two encapsulation mode: PCM and AES3. This patch implements PCM encapsulation mode only. The AAF payloader working mechanism consists of building the AAF header, prepending it to the GstBuffer received on the sink pad, and pushing the buffer downstream. Payloader parameters such as stream ID, maximum transit time, time uncertainty, and timestamping mode are passed via element properties. AAF doesn't support all possible sample format and sampling rate values so the sink pad caps template from the payloader is a subset of audio/x-raw. Additionally, this patch implements only "normal" timestamping mode from AAF. "Sparse" mode should be implemented in future. Upcoming patches will introduce other AVTP payloader elements that will have some common code. For that reason, this patch introduces the GstAvtpBasePayload abstract class that implements common payloader functionalities, and the GstAvtpAafPay class that extends the GstAvtpBasePayload class, implementing AAF-specific functionalities. The AAF payloader element is most likely to be used with the AVTP sink element (to be introduced by a later patch) but it could also be used with UDP sink element to implement AVTP over UDP as described in IEEE 1722-2016 Annex J. This element was inspired by RTP payloader elements.
2019-01-17 01:16:59 +00:00
'gstavtpbasepayload.c',
avtp: Introduce AVTP sink element This patch introduces the avtpsink elements which implements a typical network sink. Implementation is pretty straightforward since the burden is implemented by GstBaseSink class. The avtpsink element defines three new properties: 1) network interface from where AVTPDU should be transmitted, 2) destination MAC address (usually a multicast address), and 3) socket priority (SO_PRIORITY). Socket setup and teardown are done in start/stop virtual methods while AVTPDU transmission is carried out by render(). AVTPDUs are encapsulated into Ethernet frames and transmitted to the network via AF_PACKET socket domain. Linux requires CAP_NET_RAW capability in order to open an AF_PACKET socket so the application that utilize this element must have it. For further info about AF_PACKET socket domain see packet(7). Finally, AVTPDUs are expected to be transmitted at specific times - according to the GstBuffer presentation timestamp - so the 'sync' property from GstBaseSink is set to TRUE by default.
2019-01-23 18:56:10 +00:00
'gstavtpsink.c',
avtp: Introduce AVTP source element This patch introduces the avtpsrc element which implements a typical network source. The avtpsrc element receives AVTPDUs encapsulated into Ethernet frames and push them downstream in the GStreamer pipeline. Implementation if pretty straightforward since the burden is implemented by GstPushSrc class. Likewise the avtpsink element, applications that utilize this element must have CAP_NET_RAW capability since it is required by Linux to open sockets from AF_PACKET domain.
2019-01-23 23:17:48 +00:00
'gstavtpsrc.c',
avtp: AVTP plugin bootstrap code This patch introduces the bootstrap code from the AVTP plugin (plugin definition and init) as well as the build system files. Upcoming patches will introduce payloaders, source and sink elements provided by the AVTP plugin. These elements can be utilized by a GStreamer pipeline to implement TSN audio/video applications. Regarding the plugin build system files, both autotools and meson files are introduced. The AVTP plugin is landed in ext/ since it has an external dependency on libavtp, an opensource AVTP packetization library. For further information about libavtp check [1]. [1] https://github.com/AVnu/libavtp
2019-01-14 18:18:42 +00:00
]
avtp_dep = dependency('avtp', required: get_option('avtp'))
if avtp_dep.found()
gstavtp = library('gstavtp',
avtp_sources,
c_args : gst_plugins_bad_args,
include_directories : [configinc],
avtp: Introduce AVTP CVF payloader element This patch introduces the AVTP Compressed Video Format (CVF) payloader specified in IEEE 1722-2016 section 8. Currently, this payload only supports H.264 encapsulation described in section 8.5. Is also worth noting that only single NAL units are encapsulated: no aggregation or fragmentation is performed by the payloader. An interesting characteristic of CVF H.264 spec is that it defines an H264_TIMESTAMP, in addition to the AVTP timestamp. The later is translated to the GST_BUFFER_DTS while the former is translated to the GST_BUFFER_PTS. From AVTP CVF H.264 spec, it is clear that the AVTP timestamp is related to the decoding order, while the H264_TIMESTAMP is an ancillary information to the H.264 decoder. Upon receiving a buffer containing a group of NAL units, the avtpcvfpay element will extract each NAL unit and payload them into individual AVTP packets. The last AVTP packet generated for a group of NAL units will have the M bit set, so the depayloader is able to properly regroup them. The exact format of the buffer of NAL units is described on the 'codec_data' capability, which is parsed by the avtpcvfpay, in the same way done in rtph264pay. This patch reuses the infra provided by gstavtpbasepayload.c.
2019-02-28 23:49:02 +00:00
dependencies : [gstaudio_dep, gstvideo_dep, avtp_dep],
avtp: AVTP plugin bootstrap code This patch introduces the bootstrap code from the AVTP plugin (plugin definition and init) as well as the build system files. Upcoming patches will introduce payloaders, source and sink elements provided by the AVTP plugin. These elements can be utilized by a GStreamer pipeline to implement TSN audio/video applications. Regarding the plugin build system files, both autotools and meson files are introduced. The AVTP plugin is landed in ext/ since it has an external dependency on libavtp, an opensource AVTP packetization library. For further information about libavtp check [1]. [1] https://github.com/AVnu/libavtp
2019-01-14 18:18:42 +00:00
install : true,
install_dir : plugins_install_dir,
)
pkgconfig.generate(gstavtp, install_dir : plugins_pkgconfig_install_dir)
endif
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