mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-10 11:29:55 +00:00
Code Issues 1 Projects Releases Wiki Activity

ext/lame/gstlame.c: Allow fixing the sample rate lame converts to by negotiating fixed sample rate on the src pad caps.

Browse source 
Original commit message from CVS:
* ext/lame/gstlame.c:
Allow fixing the sample rate lame converts to by negotiating fixed
sample rate on the src pad caps.
Add docs for it.
* tests/check/Makefile.am:
* tests/check/pipelines/lame.c:
Add a check for it.
This commit is contained in:
Thomas Vander Stichele 2007-09-24 10:26:21 +00:00
parent c39c53197c
commit 74508a9f75
2 changed files with 141 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

46
ext/lame/gstlame.c
View file

@ -32,6 +32,14 @@
* consideration. See <ulink url="http://www.vorbis.com/">Ogg/Vorbis</ulink>
* for a royalty free (and often higher quality) alternative.
* </para>
* <title>Output sample rate</title>
* <para>
* If no fixed output sample rate is negotiated on the element's src pad,
* the element will choose an optimal sample rate to resample to internally.
* For example, a 16-bit 44.1 KHz mono audio stream encoded at 48 kbit will
* get resampled to 32 KHz. Use filter caps on the src pad to force a
* particular sample rate.
* </para>
* <title>Writing metadata (tags)</title>
* <para>
* Whilst the lame encoder element does claim to implement the GstTagSetter
@ -65,9 +73,15 @@
* <programlisting>
* gst-launch -v cdda://5 ! audioconvert ! lame bitrate=192 ! filesink location=track5.mp3
* </programlisting>
* <para>
* Encode to a fixed sample rate:
* </para>
* <programlisting>
* gst-launch -v audiotestsrc num-buffers=10 ! audio/x-raw-int,rate=44100,channels=1 ! lame bitrate=48 mode=3 ! filesink location=test.mp3
* </programlisting>
* </refsect2>
*
* Last reviewed on 2006-10-13 (0.10.4)
* Last reviewed on 2007-07-24 (0.10.7)
*/
#ifdef HAVE_CONFIG_H
@ -495,6 +509,13 @@ gst_lame_class_init (GstLameClass * klass)
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_lame_change_state);
}
static gboolean
gst_lame_src_setcaps (GstPad * pad, GstCaps * caps)
{
GST_DEBUG_OBJECT (pad, "src_setcaps %s", gst_caps_to_string (caps));
return TRUE;
}
static gboolean
gst_lame_sink_setcaps (GstPad * pad, GstCaps * caps)
{
@ -579,6 +600,8 @@ gst_lame_init (GstLame * lame)
lame->srcpad =
gst_pad_new_from_static_template (&gst_lame_src_template, "src");
gst_pad_set_setcaps_function (lame->srcpad,
GST_DEBUG_FUNCPTR (gst_lame_src_setcaps));
gst_element_add_pad (GST_ELEMENT (lame), lame->srcpad);
/* create an encoder state so we can ask about defaults */
@ -1130,13 +1153,18 @@ init_error:
static gboolean
gst_lame_setup (GstLame * lame)
{
#define CHECK_ERROR(command) G_STMT_START {\
if ((command) < 0) { \
GST_ERROR_OBJECT (lame, "setup failed: " G_STRINGIFY (command)); \
return FALSE; \
} \
}G_STMT_END
int retval;
GstCaps *src_caps;
GstStructure *structure;
gint samplerate;
GST_DEBUG_OBJECT (lame, "starting setup");
@ -1153,12 +1181,22 @@ gst_lame_setup (GstLame * lame)
if (lame->lgf == NULL)
return FALSE;
/* let lame choose a default samplerate */
lame_set_out_samplerate (lame->lgf, 0);
/* copy the parameters over */
lame_set_in_samplerate (lame->lgf, lame->samplerate);
/* let lame choose default samplerate unless outgoing sample rate is fixed */
src_caps = gst_pad_get_allowed_caps (lame->srcpad);
structure = gst_caps_get_structure (src_caps, 0);
if (gst_structure_get_int (structure, "rate", &samplerate)) {
GST_DEBUG_OBJECT (lame, "Setting sample rate to %d as fixed in src caps",
samplerate);
lame_set_out_samplerate (lame->lgf, samplerate);
} else {
GST_DEBUG_OBJECT (lame, "Letting lame choose sample rate");
lame_set_out_samplerate (lame->lgf, 0);
}
/* force mono encoding if we only have one channel */
if (lame->num_channels == 1)
lame->mode = 3;

99
tests/check/pipelines/lame.c Normal file
View file

@ -0,0 +1,99 @@
/* GStreamer
*
* unit test for lame
*
* Copyright (C) 2007 Thomas Vander Stichele <thomas at apestaart dot org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gst/check/gstcheck.h>
#include <gst/check/gstbufferstraw.h>
#ifndef GST_DISABLE_PARSE
GST_START_TEST (test_format)
{
GstElement *bin;
GstPad *pad;
gchar *pipe_str;
GstBuffer *buffer;
GError *error = NULL;
pipe_str = g_strdup_printf ("audiotestsrc num-buffers=1 "
"! audio/x-raw-int, rate=22050, channels=1 "
"! lame bitrate=24 mode=3 " "! audio/mpeg,rate=22050 ! fakesink");
bin = gst_parse_launch (pipe_str, &error);
fail_unless (bin != NULL, "Error parsing pipeline: %s",
error ? error->message : "(invalid error)");
g_free (pipe_str);
/* get the pad */
{
GstElement *sink = gst_bin_get_by_name (GST_BIN (bin), "fakesink0");
fail_unless (sink != NULL, "Could not get fakesink out of bin");
pad = gst_element_get_pad (sink, "sink");
fail_unless (pad != NULL, "Could not get pad out of fakesink");
gst_object_unref (sink);
}
gst_buffer_straw_start_pipeline (bin, pad);
buffer = gst_buffer_straw_get_buffer (bin, pad);
gst_buffer_straw_stop_pipeline (bin, pad);
gst_object_unref (pad);
gst_object_unref (bin);
}
GST_END_TEST;
#endif /* #ifndef GST_DISABLE_PARSE */
Suite *
lame_suite (void)
{
Suite *s = suite_create ("lame");
TCase *tc_chain = tcase_create ("general");
suite_add_tcase (s, tc_chain);
#ifndef GST_DISABLE_PARSE
tcase_add_test (tc_chain, test_format);
#endif
return s;
}
int
main (int argc, char **argv)
{
int nf;
Suite *s = lame_suite ();
SRunner *sr = srunner_create (s);
gst_check_init (&argc, &argv);
srunner_run_all (sr, CK_NORMAL);
nf = srunner_ntests_failed (sr);
srunner_free (sr);
return nf;
}