From 4e36a2b991d58a40d7ea12c9bf41e93736b8b024 Mon Sep 17 00:00:00 2001 From: Michael Giacomelli Date: Sat, 20 Sep 2008 22:06:12 +0000 Subject: Commit FS#9318 - MP3 synthesis filter on COP. Loads the MP3 synth filer on to the CoProcessor on all PortalPlayer devices, resulting in an ~90% speedup according to test_codec on the Sansa. Real world improvement is somewhat less, but still considerable. Allows MP3 decoding at 30MHz without boosting, or use of more DSP/EQ with less boosting/skipping, thus improving battery life. Minor changes to mpegplayer to retain compatibility with libmad changes. Should be no significant changes for other targets or codecs. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18557 a1c6a512-1295-4272-9138-f99709370657 --- apps/plugins/mpegplayer/audio_thread.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'apps/plugins/mpegplayer/audio_thread.c') diff --git a/apps/plugins/mpegplayer/audio_thread.c b/apps/plugins/mpegplayer/audio_thread.c index 838dcad..3515815 100644 --- a/apps/plugins/mpegplayer/audio_thread.c +++ b/apps/plugins/mpegplayer/audio_thread.c @@ -55,6 +55,9 @@ static struct mad_stream stream IBSS_ATTR; static struct mad_frame frame IBSS_ATTR; static struct mad_synth synth IBSS_ATTR; +/*sbsample buffer for mad_frame*/ +mad_fixed_t sbsample[2][36][32]; + /* 2567 bytes */ static unsigned char mad_main_data[MAD_BUFFER_MDLEN]; @@ -229,6 +232,10 @@ static int audio_buffer(struct stream *str, enum stream_parse_mode type) /* Initialise libmad */ static void init_mad(void) { + /*init the sbsample buffer*/ + frame.sbsample = &sbsample; + frame.sbsample_prev = &sbsample; + mad_stream_init(&stream); mad_frame_init(&frame); mad_synth_init(&synth); -- cgit v1.1