FFmpeg audio API - Revision history

Merbanan: added dwChannelMask

2008-06-18T11:18:48Z

added dwChannelMask

@@ Line 183: / Line 183: @@
   */
 int ff_mix(AVMIXContext* mix);
 == See also ==

Gamester17: /* See also */

2008-02-29T13:59:23Z

Suxen drol: dump AVCODEC_MAX_AUDIO_FRAME_SIZE

2008-01-26T06:46:31Z

dump AVCODEC_MAX_AUDIO_FRAME_SIZE

← Older revision		Revision as of 23:46, 25 January 2008
Line 32:		Line 32:
	** Artificial reverberation		** Artificial reverberation
	*Create a SDK (Software Development Kit) with templates for the A/V filter APIs		*Create a SDK (Software Development Kit) with templates for the A/V filter APIs
			* Replace AVCODEC_MAX_AUDIO_FRAME_SIZE with a run-time calculated buffer size, that is tailored to the selected encoder/decoder. Currently, user applications must supply ffmpeg with an input/output buffer of AVCODEC_MAX_AUDIO_FRAME_SIZE bytes, irrespective of whether the codec will read/write that many samples.

	== Current ideas ==		== Current ideas ==

Merbanan: Added

2008-01-25T11:23:17Z

Added

← Older revision		Revision as of 04:23, 25 January 2008
Line 17:		Line 17:
	* Support bit depths other than 16-bit - 8-bit/24-bit/32-bit/float		* Support bit depths other than 16-bit - 8-bit/24-bit/32-bit/float
	* Channel selection - ability to access one channel from a multichannel stream		* Channel selection - ability to access one channel from a multichannel stream
			* SPDIF passthough support
	* Decide on name of a such A/V filter API.		* Decide on name of a such A/V filter API.
	** libavmunge, or simply extend on the existing libavfilter have been suggested so far.		** libavmunge, or simply extend on the existing libavfilter have been suggested so far.

Gamester17: /* Current ideas */

2008-01-21T14:27:37Z

Current ideas

← Older revision		Revision as of 07:27, 21 January 2008
Line 44:		Line 44:

	*Take a look at other existing players API for filter plugins, like for example:		*Take a look at other existing players API for filter plugins, like for example:
	* [http://xinehq.de/index.php/hackersguide#AEN864 Xine]		** [http://xinehq.de/index.php/hackersguide#AEN864 Xine]
	* [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]		** [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]
	* [http://www.xmms.org XMMS (X MultiMedia System)]		** [http://www.xmms.org XMMS (X MultiMedia System)]

	== Proposal for internal audio mixing api/system ==		== Proposal for internal audio mixing api/system ==

Gamester17: /* Current ideas */

2008-01-21T14:27:16Z

Current ideas

← Older revision		Revision as of 07:27, 21 January 2008
Line 46:		Line 46:
	* [http://xinehq.de/index.php/hackersguide#AEN864 Xine]		* [http://xinehq.de/index.php/hackersguide#AEN864 Xine]
	* [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]		* [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]
			* [http://www.xmms.org XMMS (X MultiMedia System)]

	== Proposal for internal audio mixing api/system ==		== Proposal for internal audio mixing api/system ==

Gamester17: /* Current ideas */

2008-01-21T14:23:22Z

Current ideas

← Older revision		Revision as of 07:23, 21 January 2008
Line 37:		Line 37:

	* http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/47485/focus=48097		* http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/47485/focus=48097
	** ~~The~~ thread has several ideas already implemented.		** This thread has several ideas that has already been implemented.
	* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-November/038323.html		* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-November/038323.html
	** Discussion of general ideas and requirements for the new API.		** Discussion of general ideas and requirements for the new API.
			* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2008-January/040816.html
			** This thread goes in to futher ideas about expanding the audio bitdepth support

	*Take a look at other existing players API for filter plugins, like for example;		*Take a look at other existing players API for filter plugins, like for example:
	[http://xinehq.de/index.php/hackersguide#AEN864 Xine], [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]		* [http://xinehq.de/index.php/hackersguide#AEN864 Xine]
			* [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]

	== Proposal for internal audio mixing api/system ==		== Proposal for internal audio mixing api/system ==

Merbanan: template for usage.

2008-01-16T17:50:35Z

template for usage.

@@ Line 45: / Line 45: @@
 == Proposal for internal audio mixing api/system ==
 ===struct codec_mix_struct===
@@ Line 82: / Line 110: @@
+   *
    * @param[in|out] mix
-   * This is the actual mixing context. It will hold the all the information needed to perform mixing.
+   * This is the actual mixing context. It will hold all the information needed to perform mixing.
    * If the passed argument is NULL it will allocate a context. If not null it will reinit the passed
    * context. The mix context is of fixed size and will be large enough to support a MAX_MIX_CHANNELS

Merbanan: /* Mixing proposal for internal audio mixing api */

2008-01-16T17:22:39Z

Mixing proposal for internal audio mixing api

← Older revision		Revision as of 10:22, 16 January 2008
Line 44:		Line 44:
	[http://xinehq.de/index.php/hackersguide#AEN864 Xine], [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]		[http://xinehq.de/index.php/hackersguide#AEN864 Xine], [http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html GStreamer]

	== ~~Mixing proposal~~ for internal audio mixing api ==		== Proposal for internal audio mixing api/system ==

	===struct codec_mix_struct===		===struct codec_mix_struct===

Jruggle: /* Features needed */

2008-01-05T17:44:57Z

Features needed

← Older revision		Revision as of 10:44, 5 January 2008
Line 9:		Line 9:
	== Features needed ==		== Features needed ==
	* Generalized channel mixing (SIMD optimized) - users should be able to set their own channel mixing coefficients.		* Generalized channel mixing (SIMD optimized) - users should be able to set their own channel mixing coefficients.
	* Codec alterable channel mixing coefficients - the codec should be able to set and update the channel mixing coefficients during runtime (DCA ~~supports this feature, maybe~~ AC-3 ~~also~~).		* Codec alterable channel mixing coefficients - the codec should be able to set and update the channel mixing coefficients during runtime (DCA and AC-3 support this).
	* Output channel request function - specify the number of output channels, ~~default~~ should be >2 channels ~~mapped~~ to 2 channels		* Output channel request function - specify the number of desired output channels. The decoder may or may not be able to grant the request. If not, a general mixing filter should be used.
	* Channel reordering - currently there are different orders depending on the codec.		* Distinguish between number of coded channels, requested channels, and output channels. Demuxers and/or parsers would only need to set the number of coded channels.
			* Channel reordering - currently there are different orders depending on the codec and/or container.
	* SIMD optimized interleaving		* SIMD optimized interleaving
	* Allow planar output - don't duplicate the interleaving code in every codec		* Allow planar output - don't duplicate the interleaving code in every codec

← Older revision		Revision as of 06:59, 29 February 2008
Line 186:		Line 186:
	== See also ==		== See also ==
	* [[Libavfilter]]		* [[Libavfilter]]
			* [[FFmpeg filter howto]]


	[[Category:FFmpeg]]		[[Category:FFmpeg]]