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channel: Add support for writing to a specific stream.

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This change adds an ast_write_stream function which allows
writing a frame to a specific media stream. It also moves
ast_write() to using this underneath by writing media
frames provided to it to the default streams of the channel.
Existing functionality (such as audiohooks, framehooks, etc)
are limited to being applied to the default stream only.

Unit tests have also been added which test the behavior of
both non-multistream and multistream channels to confirm that
the write() and write_stream() callbacks are invoked
appropriately.

ASTERISK-26793

Change-Id: I4df20d1b65bd4d787fce0b4b478e19d2dfea245c
This commit is contained in:
Joshua Colp
2017-02-22 11:00:57 +00:00
parent 911252d7b5
commit 6cc890b880
4 changed files with 498 additions and 12 deletions
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9
main/channel_internal_api.c
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@@ -1816,6 +1816,15 @@ struct ast_stream_topology *ast_channel_set_stream_topology(struct ast_channel *
return new_topology;
}
struct ast_stream *ast_channel_get_default_stream(struct ast_channel *chan,
enum ast_media_type type)
{
ast_assert(chan != NULL);
ast_assert(type < AST_MEDIA_TYPE_END);
return chan->default_streams[type];
}
void ast_channel_internal_swap_stream_topology(struct ast_channel *chan1,
struct ast_channel *chan2)
{