extern GstStaticPadTemplate mulaw_dec_src_factory;
extern GstStaticPadTemplate mulaw_dec_sink_factory;
+static gboolean gst_mulawdec_set_format (GstAudioDecoder * dec, GstCaps * caps);
+static GstFlowReturn gst_mulawdec_handle_frame (GstAudioDecoder * dec,
+ GstBuffer * buffer);
+
+
/* Stereo signals and args */
enum
{
ARG_0
};
-static GstStateChangeReturn
-gst_mulawdec_change_state (GstElement * element, GstStateChange transition);
-
-static gboolean gst_mulawdec_event (GstPad * pad, GstObject * parent,
- GstEvent * event);
-static GstFlowReturn gst_mulawdec_chain (GstPad * pad, GstObject * parent,
- GstBuffer * buffer);
-
#define gst_mulawdec_parent_class parent_class
-G_DEFINE_TYPE (GstMuLawDec, gst_mulawdec, GST_TYPE_ELEMENT);
+G_DEFINE_TYPE (GstMuLawDec, gst_mulawdec, GST_TYPE_AUDIO_DECODER);
static gboolean
-mulawdec_setcaps (GstMuLawDec * mulawdec, GstCaps * caps)
+gst_mulawdec_set_format (GstAudioDecoder * dec, GstCaps * caps)
{
+ GstMuLawDec *mulawdec = GST_MULAWDEC (dec);
GstStructure *structure;
int rate, channels;
- gboolean ret;
- GstCaps *outcaps;
GstAudioInfo info;
structure = gst_caps_get_structure (caps, 0);
- ret = gst_structure_get_int (structure, "rate", &rate);
- ret = ret && gst_structure_get_int (structure, "channels", &channels);
- if (!ret)
- return FALSE;
-
- gst_audio_info_init (&info);
- gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16, rate, channels, NULL);
-
- outcaps = gst_audio_info_to_caps (&info);
- ret = gst_pad_set_caps (mulawdec->srcpad, outcaps);
- gst_caps_unref (outcaps);
-
- if (ret) {
- GST_DEBUG_OBJECT (mulawdec, "rate=%d, channels=%d", rate, channels);
- mulawdec->info = info;
+ if (!structure) {
+ GST_ERROR ("failed to get structure from caps");
+ goto error_failed_get_structure;
}
- return ret;
-}
-static GstCaps *
-mulawdec_getcaps (GstPad * pad, GstCaps * filter)
-{
- GstMuLawDec *mulawdec;
- GstPad *otherpad;
- GstCaps *othercaps, *result;
- GstCaps *templ;
- const gchar *name;
- gint i;
-
- mulawdec = GST_MULAWDEC (GST_PAD_PARENT (pad));
-
- /* figure out the name of the caps we are going to return */
- if (pad == mulawdec->srcpad) {
- name = "audio/x-raw";
- otherpad = mulawdec->sinkpad;
- } else {
- name = "audio/x-mulaw";
- otherpad = mulawdec->srcpad;
- }
- /* get caps from the peer, this can return NULL when there is no peer */
- othercaps = gst_pad_peer_query_caps (otherpad, NULL);
-
- /* get the template caps to make sure we return something acceptable */
- templ = gst_pad_get_pad_template_caps (pad);
-
- if (othercaps) {
- /* there was a peer */
- othercaps = gst_caps_make_writable (othercaps);
-
- /* go through the caps and remove the fields we don't want */
- for (i = 0; i < gst_caps_get_size (othercaps); i++) {
- GstStructure *structure;
-
- structure = gst_caps_get_structure (othercaps, i);
-
- /* adjust the name */
- gst_structure_set_name (structure, name);
-
- if (pad == mulawdec->sinkpad) {
- /* remove the fields we don't want */
- gst_structure_remove_fields (structure, "format", "layout", NULL);
- } else {
- /* add fixed fields */
- gst_structure_set (structure, "format", G_TYPE_STRING,
- GST_AUDIO_NE (S16), "layout", G_TYPE_STRING, "interleaved", NULL);
- }
- }
- /* filter against the allowed caps of the pad to return our result */
- result = gst_caps_intersect (othercaps, templ);
- gst_caps_unref (othercaps);
- gst_caps_unref (templ);
- } else {
- /* there was no peer, return the template caps */
- result = templ;
+ if (!gst_structure_get_int (structure, "rate", &rate)) {
+ GST_ERROR ("failed to find field rate in input caps");
+ goto error_failed_find_rate;
}
- if (filter && result) {
- GstCaps *temp;
- temp = gst_caps_intersect (result, filter);
- gst_caps_unref (result);
- result = temp;
+ if (!gst_structure_get_int (structure, "channels", &channels)) {
+ GST_ERROR ("failed to find field channels in input caps");
+ goto error_failed_find_channel;
}
- return result;
-}
-static gboolean
-gst_mulawdec_query (GstPad * pad, GstObject * parent, GstQuery * query)
-{
- gboolean res;
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_CAPS:
- {
- GstCaps *filter, *caps;
-
- gst_query_parse_caps (query, &filter);
- caps = mulawdec_getcaps (pad, filter);
- gst_query_set_caps_result (query, caps);
- gst_caps_unref (caps);
-
- res = TRUE;
- break;
- }
- default:
- res = gst_pad_query_default (pad, parent, query);
- break;
- }
- return res;
-}
-
-static void
-gst_mulawdec_class_init (GstMuLawDecClass * klass)
-{
- GstElementClass *element_class = (GstElementClass *) klass;
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&mulaw_dec_src_factory));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&mulaw_dec_sink_factory));
-
- gst_element_class_set_static_metadata (element_class, "Mu Law audio decoder",
- "Codec/Decoder/Audio",
- "Convert 8bit mu law to 16bit PCM",
- "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+ gst_audio_info_init (&info);
+ gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16, rate, channels, NULL);
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_mulawdec_change_state);
-}
+ GST_DEBUG_OBJECT (mulawdec, "rate=%d, channels=%d", rate, channels);
-static void
-gst_mulawdec_init (GstMuLawDec * mulawdec)
-{
- mulawdec->sinkpad =
- gst_pad_new_from_static_template (&mulaw_dec_sink_factory, "sink");
- gst_pad_set_query_function (mulawdec->sinkpad, gst_mulawdec_query);
- gst_pad_set_event_function (mulawdec->sinkpad, gst_mulawdec_event);
- gst_pad_set_chain_function (mulawdec->sinkpad, gst_mulawdec_chain);
- gst_element_add_pad (GST_ELEMENT (mulawdec), mulawdec->sinkpad);
-
- mulawdec->srcpad =
- gst_pad_new_from_static_template (&mulaw_dec_src_factory, "src");
- gst_pad_set_query_function (mulawdec->srcpad, gst_mulawdec_query);
- gst_element_add_pad (GST_ELEMENT (mulawdec), mulawdec->srcpad);
-}
+ return gst_audio_decoder_set_output_format (dec, &info);
-static gboolean
-gst_mulawdec_event (GstPad * pad, GstObject * parent, GstEvent * event)
-{
- GstMuLawDec *mulawdec;
- gboolean res;
-
- mulawdec = GST_MULAWDEC (parent);
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_CAPS:
- {
- GstCaps *caps;
-
- gst_event_parse_caps (event, &caps);
- mulawdec_setcaps (mulawdec, caps);
- gst_event_unref (event);
-
- res = TRUE;
- break;
- }
- default:
- res = gst_pad_event_default (pad, parent, event);
- break;
- }
- return res;
+error_failed_find_channel:
+error_failed_find_rate:
+error_failed_get_structure:
+ return FALSE;
}
static GstFlowReturn
-gst_mulawdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
+gst_mulawdec_handle_frame (GstAudioDecoder * dec, GstBuffer * buffer)
{
- GstMuLawDec *mulawdec;
GstMapInfo inmap, outmap;
gint16 *linear_data;
guint8 *mulaw_data;
gsize mulaw_size, linear_size;
GstBuffer *outbuf;
- GstFlowReturn ret;
- mulawdec = GST_MULAWDEC (parent);
-
- if (G_UNLIKELY (!GST_AUDIO_INFO_IS_VALID (&mulawdec->info)))
- goto not_negotiated;
+ if (!gst_buffer_map (buffer, &inmap, GST_MAP_READ)) {
+ GST_ERROR ("failed to map input buffer");
+ goto error_failed_map_input_buffer;
+ }
- gst_buffer_map (buffer, &inmap, GST_MAP_READ);
mulaw_data = inmap.data;
mulaw_size = inmap.size;
linear_size = mulaw_size * 2;
- outbuf = gst_buffer_new_allocate (NULL, linear_size, NULL);
- gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE);
- linear_data = (gint16 *) outmap.data;
-
- /* copy discont flag */
- if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
- GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
-
- GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
- if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
- GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
- } else {
- GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale_int (GST_SECOND,
- linear_size, GST_AUDIO_INFO_RATE (&mulawdec->info) *
- GST_AUDIO_INFO_BPF (&mulawdec->info));
+ outbuf = gst_audio_decoder_allocate_output_buffer (dec, linear_size);
+ if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE)) {
+ GST_ERROR ("failed to map input buffer");
+ goto error_failed_map_output_buffer;
}
+ linear_data = (gint16 *) outmap.data;
+
mulaw_decode (mulaw_data, linear_data, mulaw_size);
gst_buffer_unmap (outbuf, &outmap);
gst_buffer_unmap (buffer, &inmap);
- gst_buffer_unref (buffer);
- ret = gst_pad_push (mulawdec->srcpad, outbuf);
+ return gst_audio_decoder_finish_frame (dec, outbuf, -1);
- return ret;
+error_failed_map_output_buffer:
+ gst_buffer_unref (outbuf);
- /* ERRORS */
-not_negotiated:
- {
- GST_WARNING_OBJECT (mulawdec, "no input format set: not-negotiated");
- gst_buffer_unref (buffer);
- return GST_FLOW_NOT_NEGOTIATED;
- }
+error_failed_map_input_buffer:
+ return FALSE;
}
-static GstStateChangeReturn
-gst_mulawdec_change_state (GstElement * element, GstStateChange transition)
+static void
+gst_mulawdec_class_init (GstMuLawDecClass * klass)
{
- GstStateChangeReturn ret;
- GstMuLawDec *dec = GST_MULAWDEC (element);
+ GstElementClass *element_class = (GstElementClass *) klass;
+ GstAudioDecoderClass *audiodec_class = GST_AUDIO_DECODER_CLASS (klass);
- switch (transition) {
- default:
- break;
- }
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&mulaw_dec_src_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&mulaw_dec_sink_factory));
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
- if (ret != GST_STATE_CHANGE_SUCCESS)
- return ret;
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- gst_audio_info_init (&dec->info);
- break;
- default:
- break;
- }
+ audiodec_class->set_format = GST_DEBUG_FUNCPTR (gst_mulawdec_set_format);
+ audiodec_class->handle_frame = GST_DEBUG_FUNCPTR (gst_mulawdec_handle_frame);
- return ret;
+ gst_element_class_set_static_metadata (element_class, "Mu Law audio decoder",
+ "Codec/Decoder/Audio",
+ "Convert 8bit mu law to 16bit PCM",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+}
+
+static void
+gst_mulawdec_init (GstMuLawDec * mulawdec)
+{
}
--- /dev/null
+/* GStreamer MulawDec unit tests
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/check/gstcheck.h>
+#include <string.h>
+
+static GstPad *mysrcpad, *mysinkpad;
+static GstElement *mulawdec = NULL;
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw,"
+ "format = (string) S16LE, "
+ "rate = (int) 8000, "
+ "channels = (int) 1, " "layout = (string)interleaved")
+ );
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-mulaw," "rate = (int) 8000," "channels = (int) 1")
+ );
+
+static void
+mulawdec_setup (void)
+{
+ GstCaps *src_caps;
+
+ src_caps =
+ gst_caps_from_string ("audio/x-mulaw," "rate = (int) 8000,"
+ "channels = (int) 1");
+
+ GST_DEBUG ("%s", __FUNCTION__);
+
+ mulawdec = gst_check_setup_element ("mulawdec");
+
+ mysrcpad = gst_check_setup_src_pad (mulawdec, &srctemplate);
+ mysinkpad = gst_check_setup_sink_pad (mulawdec, &sinktemplate);
+
+ gst_pad_set_active (mysrcpad, TRUE);
+ gst_pad_set_active (mysinkpad, TRUE);
+
+ gst_pad_set_caps (mysrcpad, src_caps);
+ gst_caps_unref (src_caps);
+}
+
+static void
+buffer_unref (void *buffer, void *user_data)
+{
+ gst_buffer_unref (GST_BUFFER (buffer));
+}
+
+static void
+mulawdec_teardown (void)
+{
+ /* free decoded buffers */
+ g_list_foreach (buffers, buffer_unref, NULL);
+ g_list_free (buffers);
+ buffers = NULL;
+
+ gst_pad_set_active (mysrcpad, FALSE);
+ gst_pad_set_active (mysinkpad, FALSE);
+ gst_check_teardown_src_pad (mulawdec);
+ gst_check_teardown_sink_pad (mulawdec);
+ gst_check_teardown_element (mulawdec);
+ mulawdec = NULL;
+}
+
+GST_START_TEST (test_one_buffer)
+{
+ GstBuffer *buffer;
+ gint buf_size = 4096;
+ guint8 *dp;
+
+ fail_unless (gst_element_set_state (mulawdec, GST_STATE_PLAYING) ==
+ GST_STATE_CHANGE_SUCCESS, "could not change state to playing");
+
+ buffer = gst_buffer_new ();
+ dp = g_malloc0 (buf_size);
+ gst_buffer_append_memory (buffer,
+ gst_memory_new_wrapped (0, dp, buf_size, 0, buf_size, dp, g_free));
+ ASSERT_BUFFER_REFCOUNT (buffer, "buffer", 1);
+
+ fail_unless (gst_pad_push (mysrcpad, buffer) == GST_FLOW_OK);
+
+ fail_unless (g_list_length (buffers) == 1);
+ fail_unless (gst_buffer_get_size (GST_BUFFER (g_list_first (buffers)->data)));
+}
+
+GST_END_TEST;
+
+static Suite *
+mulawdec_suite (void)
+{
+ Suite *s = suite_create ("mulawdec");
+ TCase *tc_chain = tcase_create ("mulawdec");
+
+ tcase_add_checked_fixture (tc_chain, mulawdec_setup, mulawdec_teardown);
+
+ suite_add_tcase (s, tc_chain);
+ tcase_add_test (tc_chain, test_one_buffer);
+ return s;
+}
+
+GST_CHECK_MAIN (mulawdec)