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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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alawdec: port to audiodecoder base class
mulawdec was already ported, alawdec was left behind.
This commit is contained in:
Thiago Santos
parent
41a4b68390
commit
7ab3178cc4
2 changed files with 77 additions and 241 deletions
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@ -34,16 +34,12 @@ extern GstStaticPadTemplate alaw_dec_sink_factory;
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GST_DEBUG_CATEGORY_STATIC (alaw_dec_debug);
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#define GST_CAT_DEFAULT alaw_dec_debug
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static GstStateChangeReturn
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gst_alaw_dec_change_state (GstElement * element, GstStateChange transition);
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static gboolean gst_alaw_dec_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static GstFlowReturn gst_alaw_dec_chain (GstPad * pad, GstObject * parent,
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static gboolean gst_alaw_dec_set_format (GstAudioDecoder * dec, GstCaps * caps);
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static GstFlowReturn gst_alaw_dec_handle_frame (GstAudioDecoder * dec,
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GstBuffer * buffer);
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#define gst_alaw_dec_parent_class parent_class
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G_DEFINE_TYPE (GstALawDec, gst_alaw_dec, GST_TYPE_ELEMENT);
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G_DEFINE_TYPE (GstALawDec, gst_alaw_dec, GST_TYPE_AUDIO_DECODER);
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/* some day we might have defines in gstconfig.h that tell us about the
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* desired cpu/memory/binary size trade-offs */
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@ -115,141 +111,116 @@ alaw_to_s16 (guint8 a_val)
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#endif /* GST_ALAW_DEC_USE_TABLE */
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static gboolean
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gst_alaw_dec_setcaps (GstALawDec * alawdec, GstCaps * caps)
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gst_alaw_dec_set_format (GstAudioDecoder * dec, GstCaps * caps)
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{
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GstALawDec *alawdec = GST_ALAW_DEC (dec);
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GstStructure *structure;
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int rate, channels;
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gboolean ret;
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GstCaps *outcaps;
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GstAudioInfo info;
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structure = gst_caps_get_structure (caps, 0);
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if (!structure) {
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GST_ERROR ("failed to get structure from caps");
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goto error_failed_get_structure;
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}
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ret = gst_structure_get_int (structure, "rate", &rate);
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ret &= gst_structure_get_int (structure, "channels", &channels);
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if (!ret)
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return FALSE;
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if (!gst_structure_get_int (structure, "rate", &rate)) {
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GST_ERROR ("failed to find field rate in input caps");
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goto error_failed_find_rate;
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}
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if (!gst_structure_get_int (structure, "channels", &channels)) {
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GST_ERROR ("failed to find field channels in input caps");
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goto error_failed_find_channel;
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}
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gst_audio_info_init (&info);
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gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16, rate, channels, NULL);
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outcaps = gst_audio_info_to_caps (&info);
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ret = gst_pad_set_caps (alawdec->srcpad, outcaps);
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gst_caps_unref (outcaps);
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if (ret) {
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GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
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alawdec->info = info;
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}
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return ret;
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return gst_audio_decoder_set_output_format (dec, &info);
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error_failed_find_channel:
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error_failed_find_rate:
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error_failed_get_structure:
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return FALSE;
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}
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static GstCaps *
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gst_alaw_dec_getcaps (GstPad * pad, GstCaps * filter)
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static GstFlowReturn
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gst_alaw_dec_handle_frame (GstAudioDecoder * dec, GstBuffer * buffer)
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{
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GstALawDec *alawdec;
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GstPad *otherpad;
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GstCaps *othercaps, *result;
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GstCaps *templ;
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const gchar *name;
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GstMapInfo inmap, outmap;
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gint16 *linear_data;
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guint8 *alaw_data;
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gsize alaw_size, linear_size;
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GstBuffer *outbuf;
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gint i;
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alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
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/* figure out the name of the caps we are going to return */
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if (pad == alawdec->srcpad) {
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name = "audio/x-raw";
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otherpad = alawdec->sinkpad;
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} else {
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name = "audio/x-alaw";
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otherpad = alawdec->srcpad;
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if (!buffer) {
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return GST_FLOW_OK;
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}
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/* get caps from the peer, this can return NULL when there is no peer */
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othercaps = gst_pad_peer_query_caps (otherpad, NULL);
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/* get the template caps to make sure we return something acceptable */
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templ = gst_pad_get_pad_template_caps (pad);
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if (othercaps) {
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/* there was a peer */
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othercaps = gst_caps_make_writable (othercaps);
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/* go through the caps and remove the fields we don't want */
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for (i = 0; i < gst_caps_get_size (othercaps); i++) {
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GstStructure *structure;
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structure = gst_caps_get_structure (othercaps, i);
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/* adjust the name */
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gst_structure_set_name (structure, name);
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if (pad == alawdec->sinkpad) {
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/* remove the fields we don't want */
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gst_structure_remove_fields (structure, "format", "layout", NULL);
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} else {
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/* add fixed fields */
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gst_structure_set (structure, "format", G_TYPE_STRING,
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GST_AUDIO_NE (S16), "layout", G_TYPE_STRING, "interleaved", NULL);
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if (!gst_buffer_map (buffer, &inmap, GST_MAP_READ)) {
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GST_ERROR ("failed to map input buffer");
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goto error_failed_map_input_buffer;
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}
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}
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/* filter against the allowed caps of the pad to return our result */
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result = gst_caps_intersect (othercaps, templ);
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gst_caps_unref (othercaps);
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gst_caps_unref (templ);
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} else {
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/* there was no peer, return the template caps */
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result = templ;
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}
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if (filter && result) {
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GstCaps *temp;
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temp = gst_caps_intersect (result, filter);
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gst_caps_unref (result);
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result = temp;
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alaw_data = inmap.data;
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alaw_size = inmap.size;
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linear_size = alaw_size * 2;
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outbuf = gst_audio_decoder_allocate_output_buffer (dec, linear_size);
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if (!gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE)) {
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GST_ERROR ("failed to map input buffer");
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goto error_failed_map_output_buffer;
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}
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return result;
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linear_data = (gint16 *) outmap.data;
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for (i = 0; i < alaw_size; i++) {
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linear_data[i] = alaw_to_s16 (alaw_data[i]);
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}
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gst_buffer_unmap (outbuf, &outmap);
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gst_buffer_unmap (buffer, &inmap);
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return gst_audio_decoder_finish_frame (dec, outbuf, -1);
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error_failed_map_output_buffer:
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gst_buffer_unref (outbuf);
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error_failed_map_input_buffer:
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return GST_FLOW_ERROR;
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}
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static gboolean
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gst_alaw_dec_query (GstPad * pad, GstObject * parent, GstQuery * query)
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gst_alaw_dec_start (GstAudioDecoder * dec)
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{
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gboolean res;
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gst_audio_decoder_set_estimate_rate (dec, TRUE);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_CAPS:
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{
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GstCaps *filter, *caps;
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gst_query_parse_caps (query, &filter);
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caps = gst_alaw_dec_getcaps (pad, filter);
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gst_query_set_caps_result (query, caps);
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gst_caps_unref (caps);
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res = TRUE;
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break;
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}
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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return TRUE;
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}
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static void
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gst_alaw_dec_class_init (GstALawDecClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstElementClass *element_class = (GstElementClass *) klass;
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GstAudioDecoderClass *audiodec_class = GST_AUDIO_DECODER_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&alaw_dec_src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&alaw_dec_sink_factory));
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gst_element_class_set_static_metadata (element_class, "A Law audio decoder",
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"Codec/Decoder/Audio", "Convert 8bit A law to 16bit PCM",
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"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
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audiodec_class->start = GST_DEBUG_FUNCPTR (gst_alaw_dec_start);
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audiodec_class->set_format = GST_DEBUG_FUNCPTR (gst_alaw_dec_set_format);
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audiodec_class->handle_frame = GST_DEBUG_FUNCPTR (gst_alaw_dec_handle_frame);
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_alaw_dec_change_state);
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gst_element_class_set_static_metadata (element_class, "A Law audio decoder",
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"Codec/Decoder/Audio",
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"Convert 8bit A law to 16bit PCM",
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"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
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GST_DEBUG_CATEGORY_INIT (alaw_dec_debug, "alawdec", 0, "A Law audio decoder");
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}
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@ -257,137 +228,5 @@ gst_alaw_dec_class_init (GstALawDecClass * klass)
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static void
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gst_alaw_dec_init (GstALawDec * alawdec)
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{
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alawdec->sinkpad =
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gst_pad_new_from_static_template (&alaw_dec_sink_factory, "sink");
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gst_pad_set_query_function (alawdec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_alaw_dec_query));
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gst_pad_set_event_function (alawdec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_alaw_dec_event));
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gst_pad_set_chain_function (alawdec->sinkpad,
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GST_DEBUG_FUNCPTR (gst_alaw_dec_chain));
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gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->sinkpad);
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alawdec->srcpad =
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gst_pad_new_from_static_template (&alaw_dec_src_factory, "src");
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gst_pad_use_fixed_caps (alawdec->srcpad);
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gst_pad_set_query_function (alawdec->srcpad,
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GST_DEBUG_FUNCPTR (gst_alaw_dec_query));
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gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->srcpad);
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}
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static gboolean
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gst_alaw_dec_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstALawDec *alawdec;
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gboolean res;
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alawdec = GST_ALAW_DEC (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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gst_alaw_dec_setcaps (alawdec, caps);
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gst_event_unref (event);
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res = TRUE;
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break;
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}
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default:
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res = gst_pad_event_default (pad, parent, event);
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break;
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}
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return res;
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}
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static GstFlowReturn
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gst_alaw_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstALawDec *alawdec;
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GstMapInfo inmap, outmap;
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gint16 *linear_data;
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guint8 *alaw_data;
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gsize alaw_size, linear_size;
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GstBuffer *outbuf;
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gint i;
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GstFlowReturn ret;
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alawdec = GST_ALAW_DEC (parent);
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if (G_UNLIKELY (!GST_AUDIO_INFO_IS_VALID (&alawdec->info)))
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goto not_negotiated;
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GST_LOG_OBJECT (alawdec, "buffer with ts=%" GST_TIME_FORMAT,
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GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
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gst_buffer_map (buffer, &inmap, GST_MAP_READ);
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alaw_data = inmap.data;
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alaw_size = inmap.size;
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linear_size = alaw_size * 2;
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outbuf = gst_buffer_new_allocate (NULL, linear_size, NULL);
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gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE);
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linear_data = (gint16 *) outmap.data;
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/* copy discont flag */
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if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
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GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
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GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
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if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
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GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
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} else {
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GST_BUFFER_DURATION (outbuf) = gst_util_uint64_scale_int (GST_SECOND,
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linear_size, GST_AUDIO_INFO_RATE (&alawdec->info) *
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GST_AUDIO_INFO_BPF (&alawdec->info));
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}
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for (i = 0; i < alaw_size; i++) {
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linear_data[i] = alaw_to_s16 (alaw_data[i]);
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}
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gst_buffer_unmap (outbuf, &outmap);
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gst_buffer_unmap (buffer, &inmap);
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gst_buffer_unref (buffer);
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ret = gst_pad_push (alawdec->srcpad, outbuf);
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return ret;
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not_negotiated:
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{
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gst_buffer_unref (buffer);
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GST_WARNING_OBJECT (alawdec, "no input format set: not-negotiated");
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return GST_FLOW_NOT_NEGOTIATED;
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}
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}
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static GstStateChangeReturn
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gst_alaw_dec_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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GstALawDec *dec = GST_ALAW_DEC (element);
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switch (transition) {
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret != GST_STATE_CHANGE_SUCCESS)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_audio_info_init (&dec->info);
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break;
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default:
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break;
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}
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return ret;
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gst_audio_decoder_set_needs_format (GST_AUDIO_DECODER (alawdec), TRUE);
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}
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@ -40,14 +40,11 @@ typedef struct _GstALawDec GstALawDec;
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typedef struct _GstALawDecClass GstALawDecClass;
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struct _GstALawDec {
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GstElement element;
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GstPad *sinkpad,*srcpad;
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GstAudioInfo info;
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GstAudioDecoder element;
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};
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struct _GstALawDecClass {
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GstElementClass parent_class;
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GstAudioDecoderClass parent_class;
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};
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GType gst_alaw_dec_get_type(void);
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