static void gst_sbc_enc_get_property(GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstSbcEnc *enc = GST_SBC_ENC(object);
switch (prop_id) {
case PROP_MODE:
g_value_set_enum(value, enc->mode);
break;
case PROP_ALLOCATION:
g_value_set_enum(value, enc->allocation);
break;
case PROP_BLOCKS:
g_value_set_enum(value, enc->blocks);
break;
case PROP_SUBBANDS:
g_value_set_enum(value, enc->subbands);
break;
case PROP_BITPOOL:
g_value_set_int(value, enc->bitpool);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static gboolean sbc_enc_sink_setcaps(GstPad *pad, GstCaps *caps)
{
GstSbcEnc *enc;
GstStructure *structure;
GstCaps *src_caps;
gint rate, channels;
gboolean res;
enc = GST_SBC_ENC(GST_PAD_PARENT(pad));
structure = gst_caps_get_structure(caps, 0);
if (!gst_structure_get_int(structure, "rate", &rate))
return FALSE;
if (!gst_structure_get_int(structure, "channels", &channels))
return FALSE;
enc->rate = rate;
enc->channels = channels;
src_caps = sbc_enc_get_fixed_srcpad_caps(enc);
if (!src_caps)
return FALSE;
res = gst_pad_set_caps(enc->srcpad, src_caps);
gst_caps_unref(src_caps);
return res;
}
static void gst_sbc_enc_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstSbcEnc *enc = GST_SBC_ENC(object);
/* changes to those properties will only happen on the next caps
* negotiation */
switch (prop_id) {
case PROP_MODE:
enc->mode = g_value_get_enum(value);
break;
case PROP_ALLOCATION:
enc->allocation = g_value_get_enum(value);
break;
case PROP_BLOCKS:
enc->blocks = g_value_get_enum(value);
break;
case PROP_SUBBANDS:
enc->subbands = g_value_get_enum(value);
break;
case PROP_BITPOOL:
enc->bitpool = g_value_get_int(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static gboolean sbc_enc_src_setcaps(GstPad *pad, GstCaps *caps)
{
GstSbcEnc *enc = GST_SBC_ENC(GST_PAD_PARENT(pad));
GST_LOG_OBJECT(enc, "setting srcpad caps");
return gst_sbc_enc_fill_sbc_params(enc, caps);
}
static GstCaps *sbc_enc_src_getcaps(GstPad *pad)
{
GstSbcEnc *enc;
enc = GST_SBC_ENC(GST_PAD_PARENT(pad));
return sbc_enc_generate_srcpad_caps(enc);
}
static void gst_sbc_enc_dispose(GObject *object)
{
GstSbcEnc *enc = GST_SBC_ENC(object);
if (enc->adapter != NULL)
g_object_unref(G_OBJECT(enc->adapter));
enc->adapter = NULL;
}
static gboolean
gst_sbc_enc_start (GstAudioEncoder * audio_enc)
{
GstSbcEnc *enc = GST_SBC_ENC (audio_enc);
GST_INFO_OBJECT (enc, "Setup subband codec");
sbc_init (&enc->sbc, 0);
return TRUE;
}
static GstFlowReturn sbc_enc_chain(GstPad *pad, GstBuffer *buffer)
{
GstSbcEnc *enc = GST_SBC_ENC(gst_pad_get_parent(pad));
GstAdapter *adapter = enc->adapter;
GstFlowReturn res = GST_FLOW_OK;
gst_adapter_push(adapter, buffer);
while (gst_adapter_available(adapter) >= enc->codesize &&
res == GST_FLOW_OK) {
GstBuffer *output;
GstCaps *caps;
const guint8 *data;
gint consumed;
caps = GST_PAD_CAPS(enc->srcpad);
res = gst_pad_alloc_buffer_and_set_caps(enc->srcpad,
GST_BUFFER_OFFSET_NONE,
enc->frame_length, caps,
&output);
if (res != GST_FLOW_OK)
goto done;
data = gst_adapter_peek(adapter, enc->codesize);
consumed = sbc_encode(&enc->sbc, (gpointer) data,
enc->codesize,
GST_BUFFER_DATA(output),
GST_BUFFER_SIZE(output), NULL);
if (consumed <= 0) {
GST_DEBUG_OBJECT(enc, "comsumed < 0, codesize: %d",
enc->codesize);
break;
}
gst_adapter_flush(adapter, consumed);
GST_BUFFER_TIMESTAMP(output) = GST_BUFFER_TIMESTAMP(buffer);
/* we have only 1 frame */
GST_BUFFER_DURATION(output) = enc->frame_duration;
res = gst_pad_push(enc->srcpad, output);
if (res != GST_FLOW_OK)
goto done;
}
done:
gst_object_unref(enc);
return res;
}
static gboolean
gst_sbc_enc_stop (GstAudioEncoder * audio_enc)
{
GstSbcEnc *enc = GST_SBC_ENC (audio_enc);
GST_INFO_OBJECT (enc, "Finish subband codec");
sbc_finish (&enc->sbc);
enc->subbands = 0;
enc->blocks = 0;
enc->rate = 0;
enc->channels = 0;
enc->bitpool = 0;
return TRUE;
}
static GstStateChangeReturn sbc_enc_change_state(GstElement *element,
GstStateChange transition)
{
GstSbcEnc *enc = GST_SBC_ENC(element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_DEBUG("Setup subband codec");
sbc_init(&enc->sbc, 0);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG("Finish subband codec");
sbc_finish(&enc->sbc);
break;
default:
break;
}
return parent_class->change_state(element, transition);
}
static gboolean
gst_sbc_enc_set_format (GstAudioEncoder * audio_enc, GstAudioInfo * info)
{
const gchar *allocation_method, *channel_mode;
GstSbcEnc *enc = GST_SBC_ENC (audio_enc);
GstStructure *s;
GstCaps *caps, *filter_caps;
GstCaps *output_caps = NULL;
guint sampleframes_per_frame;
enc->rate = GST_AUDIO_INFO_RATE (info);
enc->channels = GST_AUDIO_INFO_CHANNELS (info);
/* negotiate output format based on downstream caps restrictions */
caps = gst_pad_get_allowed_caps (GST_AUDIO_ENCODER_SRC_PAD (enc));
if (caps == GST_CAPS_NONE || gst_caps_is_empty (caps))
goto failure;
if (caps == NULL)
caps = gst_static_pad_template_get_caps (&sbc_enc_src_factory);
/* fixate output caps */
filter_caps = gst_caps_new_simple ("audio/x-sbc", "rate", G_TYPE_INT,
enc->rate, "channels", G_TYPE_INT, enc->channels, NULL);
output_caps = gst_caps_intersect (caps, filter_caps);
gst_caps_unref (filter_caps);
if (output_caps == NULL || gst_caps_is_empty (output_caps)) {
GST_WARNING_OBJECT (enc, "Couldn't negotiate output caps with input rate "
"%d and input channels %d and allowed output caps %" GST_PTR_FORMAT,
enc->rate, enc->channels, caps);
goto failure;
}
gst_caps_unref (caps);
caps = NULL;
GST_DEBUG_OBJECT (enc, "fixating caps %" GST_PTR_FORMAT, output_caps);
output_caps = gst_caps_truncate (output_caps);
s = gst_caps_get_structure (output_caps, 0);
if (enc->channels == 1)
gst_structure_fixate_field_string (s, "channel-mode", "mono");
else
gst_structure_fixate_field_string (s, "channel-mode", "joint");
gst_structure_fixate_field_nearest_int (s, "bitpool", 64);
gst_structure_fixate_field_nearest_int (s, "blocks", 16);
gst_structure_fixate_field_nearest_int (s, "subbands", 8);
gst_structure_fixate_field_string (s, "allocation-method", "loudness");
s = NULL;
/* in case there's anything else left to fixate */
output_caps = gst_caps_fixate (output_caps);
gst_caps_set_simple (output_caps, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
GST_INFO_OBJECT (enc, "output caps %" GST_PTR_FORMAT, output_caps);
/* let's see what we fixated to */
s = gst_caps_get_structure (output_caps, 0);
gst_structure_get_int (s, "blocks", &enc->blocks);
gst_structure_get_int (s, "subbands", &enc->subbands);
gst_structure_get_int (s, "bitpool", &enc->bitpool);
allocation_method = gst_structure_get_string (s, "allocation-method");
channel_mode = gst_structure_get_string (s, "channel-mode");
/* We want channel-mode and channels coherent */
if (enc->channels == 1) {
if (g_strcmp0 (channel_mode, "mono") != 0) {
GST_ERROR_OBJECT (enc, "Can't have channel-mode '%s' for 1 channel",
channel_mode);
goto failure;
}
} else {
if (g_strcmp0 (channel_mode, "joint") != 0 &&
g_strcmp0 (channel_mode, "stereo") != 0 &&
g_strcmp0 (channel_mode, "dual") != 0) {
GST_ERROR_OBJECT (enc, "Can't have channel-mode '%s' for 2 channels",
channel_mode);
goto failure;
}
}
/* we want to be handed all available samples in handle_frame, but always
* enough to encode a frame */
sampleframes_per_frame = enc->blocks * enc->subbands;
gst_audio_encoder_set_frame_samples_min (audio_enc, sampleframes_per_frame);
gst_audio_encoder_set_frame_samples_max (audio_enc, sampleframes_per_frame);
gst_audio_encoder_set_frame_max (audio_enc, 0);
/* FIXME: what to do with left-over samples at the end? can we encode them? */
gst_audio_encoder_set_hard_min (audio_enc, TRUE);
/* and configure encoder based on the output caps we negotiated */
if (enc->rate == 16000)
enc->sbc.frequency = SBC_FREQ_16000;
else if (enc->rate == 32000)
enc->sbc.frequency = SBC_FREQ_32000;
else if (enc->rate == 44100)
enc->sbc.frequency = SBC_FREQ_44100;
else if (enc->rate == 48000)
enc->sbc.frequency = SBC_FREQ_48000;
else
goto failure;
if (enc->blocks == 4)
enc->sbc.blocks = SBC_BLK_4;
else if (enc->blocks == 8)
enc->sbc.blocks = SBC_BLK_8;
else if (enc->blocks == 12)
enc->sbc.blocks = SBC_BLK_12;
else if (enc->blocks == 16)
enc->sbc.blocks = SBC_BLK_16;
else
goto failure;
enc->sbc.subbands = (enc->subbands == 4) ? SBC_SB_4 : SBC_SB_8;
enc->sbc.bitpool = enc->bitpool;
if (channel_mode == NULL || allocation_method == NULL)
goto failure;
if (strcmp (channel_mode, "joint") == 0)
enc->sbc.mode = SBC_MODE_JOINT_STEREO;
else if (strcmp (channel_mode, "stereo") == 0)
enc->sbc.mode = SBC_MODE_STEREO;
else if (strcmp (channel_mode, "dual") == 0)
enc->sbc.mode = SBC_MODE_DUAL_CHANNEL;
else if (strcmp (channel_mode, "mono") == 0)
enc->sbc.mode = SBC_MODE_MONO;
else if (strcmp (channel_mode, "auto") == 0)
enc->sbc.mode = SBC_MODE_JOINT_STEREO;
else
goto failure;
if (strcmp (allocation_method, "loudness") == 0)
enc->sbc.allocation = SBC_AM_LOUDNESS;
else if (strcmp (allocation_method, "snr") == 0)
enc->sbc.allocation = SBC_AM_SNR;
else
goto failure;
if (!gst_audio_encoder_set_output_format (audio_enc, output_caps))
goto failure;
return gst_audio_encoder_negotiate (audio_enc);
failure:
if (output_caps)
gst_caps_unref (output_caps);
if (caps)
gst_caps_unref (caps);
return FALSE;
}
static GstFlowReturn
gst_sbc_enc_handle_frame (GstAudioEncoder * audio_enc, GstBuffer * buffer)
{
GstSbcEnc *enc = GST_SBC_ENC (audio_enc);
GstMapInfo in_map, out_map;
GstBuffer *outbuf = NULL;
guint samples_per_frame, frames, i = 0;
/* no fancy draining */
if (buffer == NULL)
return GST_FLOW_OK;
if (G_UNLIKELY (enc->channels == 0 || enc->blocks == 0 || enc->subbands == 0))
return GST_FLOW_NOT_NEGOTIATED;
samples_per_frame = enc->channels * enc->blocks * enc->subbands;
if (!gst_buffer_map (buffer, &in_map, GST_MAP_READ))
goto map_failed;
frames = in_map.size / (samples_per_frame * sizeof (gint16));
GST_LOG_OBJECT (enc,
"encoding %" G_GSIZE_FORMAT " samples into %u SBC frames",
in_map.size / (enc->channels * sizeof (gint16)), frames);
if (frames > 0) {
gsize frame_len;
frame_len = sbc_get_frame_length (&enc->sbc);
outbuf = gst_audio_encoder_allocate_output_buffer (audio_enc,
frames * frame_len);
if (outbuf == NULL)
goto no_buffer;
gst_buffer_map (outbuf, &out_map, GST_MAP_WRITE);
for (i = 0; i < frames; ++i) {
gssize ret, written = 0;
ret = sbc_encode (&enc->sbc, in_map.data + (i * samples_per_frame * 2),
samples_per_frame * 2, out_map.data + (i * frame_len), frame_len,
&written);
if (ret < 0 || written != frame_len) {
GST_WARNING_OBJECT (enc, "encoding error, ret = %" G_GSSIZE_FORMAT ", "
"written = %" G_GSSIZE_FORMAT, ret, written);
break;
}
}
gst_buffer_unmap (outbuf, &out_map);
if (i > 0)
gst_buffer_set_size (outbuf, i * frame_len);
else
gst_buffer_replace (&outbuf, NULL);
}
done:
gst_buffer_unmap (buffer, &in_map);
return gst_audio_encoder_finish_frame (audio_enc, outbuf,
i * (samples_per_frame / enc->channels));
/* ERRORS */
no_buffer:
{
GST_ERROR_OBJECT (enc, "could not allocate output buffer");
goto done;
}
map_failed:
{
GST_ERROR_OBJECT (enc, "could not map input buffer");
goto done;
}
}