*
* 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.
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-alawdec
GST_DEBUG_CATEGORY_STATIC (alaw_dec_debug);
#define GST_CAT_DEFAULT alaw_dec_debug
-static GstStateChangeReturn
-gst_alaw_dec_change_state (GstElement * element, GstStateChange transition);
-
-static gboolean gst_alaw_dec_event (GstPad * pad, GstEvent * event);
-static GstFlowReturn gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_alaw_dec_set_format (GstAudioDecoder * dec, GstCaps * caps);
+static GstFlowReturn gst_alaw_dec_handle_frame (GstAudioDecoder * dec,
+ GstBuffer * buffer);
#define gst_alaw_dec_parent_class parent_class
-G_DEFINE_TYPE (GstALawDec, gst_alaw_dec, GST_TYPE_ELEMENT);
+G_DEFINE_TYPE (GstALawDec, gst_alaw_dec, GST_TYPE_AUDIO_DECODER);
/* some day we might have defines in gstconfig.h that tell us about the
* desired cpu/memory/binary size trade-offs */
#endif /* GST_ALAW_DEC_USE_TABLE */
static gboolean
-gst_alaw_dec_setcaps (GstALawDec * alawdec, GstCaps * caps)
+gst_alaw_dec_set_format (GstAudioDecoder * dec, GstCaps * caps)
{
+ GstALawDec *alawdec = GST_ALAW_DEC (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 &= gst_structure_get_int (structure, "channels", &channels);
- if (!ret)
+ if (!structure) {
+ GST_ERROR_OBJECT (dec, "failed to get structure from caps");
return FALSE;
-
- outcaps = gst_caps_new_simple ("audio/x-raw-int",
- "width", G_TYPE_INT, 16,
- "depth", G_TYPE_INT, 16,
- "endianness", G_TYPE_INT, G_BYTE_ORDER,
- "signed", G_TYPE_BOOLEAN, TRUE,
- "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
-
- ret = gst_pad_set_caps (alawdec->srcpad, outcaps);
- gst_caps_unref (outcaps);
-
- if (ret) {
- GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
- alawdec->rate = rate;
- alawdec->channels = channels;
}
- return ret;
-}
-
-static GstCaps *
-gst_alaw_dec_getcaps (GstPad * pad, GstCaps * filter)
-{
- GstALawDec *alawdec;
- GstPad *otherpad;
- GstCaps *othercaps, *result;
- const GstCaps *templ;
- const gchar *name;
- gint i;
- alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
-
- /* figure out the name of the caps we are going to return */
- if (pad == alawdec->srcpad) {
- name = "audio/x-raw-int";
- otherpad = alawdec->sinkpad;
- } else {
- name = "audio/x-alaw";
- otherpad = alawdec->srcpad;
- }
- /* get caps from the peer, this can return NULL when there is no peer */
- othercaps = gst_pad_peer_get_caps (otherpad, filter);
-
- /* 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 == alawdec->sinkpad) {
- /* remove the fields we don't want */
- gst_structure_remove_fields (structure, "width", "depth", "endianness",
- "signed", NULL);
- } else {
- /* add fixed fields */
- gst_structure_set (structure, "width", G_TYPE_INT, 16,
- "depth", G_TYPE_INT, 16,
- "endianness", G_TYPE_INT, G_BYTE_ORDER,
- "signed", G_TYPE_BOOLEAN, TRUE, NULL);
- }
- }
- /* filter against the allowed caps of the pad to return our result */
- result = gst_caps_intersect (othercaps, templ);
- gst_caps_unref (othercaps);
- } else {
- /* there was no peer, return the template caps */
- result = gst_caps_copy (templ);
+ if (!gst_structure_get_int (structure, "rate", &rate)) {
+ GST_ERROR_OBJECT (dec, "failed to find field rate in input caps");
+ return FALSE;
}
- return result;
-}
-
-static void
-gst_alaw_dec_class_init (GstALawDecClass * klass)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&alaw_dec_src_factory));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&alaw_dec_sink_factory));
-
- gst_element_class_set_details_simple (element_class, "A Law audio decoder",
- "Codec/Decoder/Audio", "Convert 8bit A law to 16bit PCM",
- "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
-
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_alaw_dec_change_state);
+ if (!gst_structure_get_int (structure, "channels", &channels)) {
+ GST_ERROR_OBJECT (dec, "failed to find field channels in input caps");
+ return FALSE;
+ }
- GST_DEBUG_CATEGORY_INIT (alaw_dec_debug, "alawdec", 0, "A Law audio decoder");
-}
+ gst_audio_info_init (&info);
+ gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16, rate, channels, NULL);
-static void
-gst_alaw_dec_init (GstALawDec * alawdec)
-{
- alawdec->sinkpad =
- gst_pad_new_from_static_template (&alaw_dec_sink_factory, "sink");
- gst_pad_set_getcaps_function (alawdec->sinkpad,
- GST_DEBUG_FUNCPTR (gst_alaw_dec_getcaps));
- gst_pad_set_event_function (alawdec->sinkpad,
- GST_DEBUG_FUNCPTR (gst_alaw_dec_event));
- gst_pad_set_chain_function (alawdec->sinkpad,
- GST_DEBUG_FUNCPTR (gst_alaw_dec_chain));
- gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->sinkpad);
-
- alawdec->srcpad =
- gst_pad_new_from_static_template (&alaw_dec_src_factory, "src");
- gst_pad_use_fixed_caps (alawdec->srcpad);
- gst_pad_set_getcaps_function (alawdec->srcpad,
- GST_DEBUG_FUNCPTR (gst_alaw_dec_getcaps));
- gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->srcpad);
-}
+ GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
-static gboolean
-gst_alaw_dec_event (GstPad * pad, GstEvent * event)
-{
- GstALawDec *alawdec;
- gboolean res;
-
- alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_CAPS:
- {
- GstCaps *caps;
-
- gst_event_parse_caps (event, &caps);
- gst_alaw_dec_setcaps (alawdec, caps);
- gst_event_unref (event);
-
- res = TRUE;
- break;
- }
- default:
- res = gst_pad_event_default (pad, event);
- break;
- }
- return res;
+ return gst_audio_decoder_set_output_format (dec, &info);
}
static GstFlowReturn
-gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer)
+gst_alaw_dec_handle_frame (GstAudioDecoder * dec, GstBuffer * buffer)
{
- GstALawDec *alawdec;
+ GstMapInfo inmap, outmap;
gint16 *linear_data;
guint8 *alaw_data;
- gsize alaw_size;
+ gsize alaw_size, linear_size;
GstBuffer *outbuf;
gint i;
- GstFlowReturn ret;
-
- alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
-
- if (G_UNLIKELY (alawdec->rate == 0))
- goto not_negotiated;
-
- GST_LOG_OBJECT (alawdec, "buffer with ts=%" GST_TIME_FORMAT,
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
- alaw_data = gst_buffer_map (buffer, &alaw_size, NULL, GST_MAP_READ);
+ if (!buffer) {
+ return GST_FLOW_OK;
+ }
- outbuf = gst_buffer_new_allocate (NULL, alaw_size, 0);
+ if (!gst_buffer_map (buffer, &inmap, GST_MAP_READ)) {
+ GST_ERROR_OBJECT (dec, "failed to map input buffer");
+ goto error_failed_map_input_buffer;
+ }
- linear_data = gst_buffer_map (outbuf, NULL, NULL, GST_MAP_WRITE);
+ alaw_data = inmap.data;
+ alaw_size = inmap.size;
- /* copy discont flag */
- if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
- GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ linear_size = alaw_size * 2;
- GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
- GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
+ outbuf = gst_audio_decoder_allocate_output_buffer (dec, linear_size);
+ if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE)) {
+ GST_ERROR_OBJECT (dec, "failed to map input buffer");
+ goto error_failed_map_output_buffer;
+ }
+ linear_data = (gint16 *) outmap.data;
for (i = 0; i < alaw_size; i++) {
linear_data[i] = alaw_to_s16 (alaw_data[i]);
}
- gst_buffer_unmap (outbuf, linear_data, -1);
- gst_buffer_unmap (buffer, alaw_data, -1);
- gst_buffer_unref (buffer);
+ gst_buffer_unmap (outbuf, &outmap);
+ gst_buffer_unmap (buffer, &inmap);
- ret = gst_pad_push (alawdec->srcpad, outbuf);
+ return gst_audio_decoder_finish_frame (dec, outbuf, -1);
- return ret;
+error_failed_map_output_buffer:
+ gst_buffer_unref (outbuf);
+ gst_buffer_unmap (buffer, &inmap);
-not_negotiated:
- {
- gst_buffer_unref (buffer);
- GST_WARNING_OBJECT (alawdec, "no input format set: not-negotiated");
- return GST_FLOW_NOT_NEGOTIATED;
- }
+error_failed_map_input_buffer:
+ return GST_FLOW_ERROR;
}
-static GstStateChangeReturn
-gst_alaw_dec_change_state (GstElement * element, GstStateChange transition)
+static gboolean
+gst_alaw_dec_start (GstAudioDecoder * dec)
{
- GstStateChangeReturn ret;
- GstALawDec *dec = GST_ALAW_DEC (element);
+ gst_audio_decoder_set_estimate_rate (dec, TRUE);
- switch (transition) {
- default:
- break;
- }
+ return TRUE;
+}
- 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:
- dec->rate = 0;
- dec->channels = 0;
- break;
- default:
- break;
- }
+static void
+gst_alaw_dec_class_init (GstALawDecClass * klass)
+{
+ GstElementClass *element_class = (GstElementClass *) klass;
+ GstAudioDecoderClass *audiodec_class = GST_AUDIO_DECODER_CLASS (klass);
+
+ gst_element_class_add_static_pad_template (element_class,
+ &alaw_dec_src_factory);
+ gst_element_class_add_static_pad_template (element_class,
+ &alaw_dec_sink_factory);
+
+ audiodec_class->start = GST_DEBUG_FUNCPTR (gst_alaw_dec_start);
+ audiodec_class->set_format = GST_DEBUG_FUNCPTR (gst_alaw_dec_set_format);
+ audiodec_class->handle_frame = GST_DEBUG_FUNCPTR (gst_alaw_dec_handle_frame);
+
+ gst_element_class_set_static_metadata (element_class, "A Law audio decoder",
+ "Codec/Decoder/Audio",
+ "Convert 8bit A law to 16bit PCM",
+ "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+
+ GST_DEBUG_CATEGORY_INIT (alaw_dec_debug, "alawdec", 0, "A Law audio decoder");
+}
- return ret;
+static void
+gst_alaw_dec_init (GstALawDec * alawdec)
+{
+ gst_audio_decoder_set_needs_format (GST_AUDIO_DECODER (alawdec), TRUE);
+ gst_audio_decoder_set_use_default_pad_acceptcaps (GST_AUDIO_DECODER_CAST
+ (alawdec), TRUE);
+ GST_PAD_SET_ACCEPT_TEMPLATE (GST_AUDIO_DECODER_SINK_PAD (alawdec));
}
projects / platform / upstream / gst-plugins-good.git / blobdiff