The new decoder is much smaller and has better code quality.
Cleanup and fixes courtesy of Kostya Shishkov.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

fixes memleak with raw gsm demuxing.

This keeps the streams sychronized. The packets must be interleaved per-DTS.

Add some parameters to existing function documentation.
Remove some unneeded documentation.
Convert some static function documentation to non-doxygen style.

This fixes a bug where the whole buffer was returned as decoded audio due to
*data_size not being set to zero and the return value being >= 0.

we only support decoding of mono imc

ask for a sample if not mono

Streams from RTSP or SDP that do not match an allowed type will
be skipped entirely, which allows video-only or audio-only
streaming from servers that provide both.
Signed-off-by: Martin Storsjö <martin@martin.st>

also return AVERROR(EINVAL) instead of -1

Put the new raw GSM demuxer in its own file.
Fixes raw GSM demuxing.

calculate it from c->code_size instead.

This is an easy alternative to setting bit_rate. This patch also selects the
closest bit_rate to the requested one rather than requiring an exact value.

This should never happen, but the check avoids a divide-by-zero.