static GstCaps *
gst_video_test_src_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
if (gst_structure_has_field (structure, "colorimetry"))
gst_structure_fixate_field_string (structure, "colorimetry", "bt601");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "interlace-mode"))
gst_structure_fixate_field_string (structure, "interlace-mode",
"progressive");
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
static GstCaps *
gst_inter_video_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstInterVideoSrc *intervideosrc = GST_INTER_VIDEO_SRC (src);
GstStructure *structure;
GST_DEBUG_OBJECT (intervideosrc, "fixate");
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
return caps;
}
static GstCaps *
gst_ladspa_source_type_fixate (GstBaseSrc * base, GstCaps * caps)
{
GstLADSPASource *ladspa = GST_LADSPA_SOURCE (base);
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (ladspa, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_nearest_int (structure, "rate",
GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (F32));
gst_structure_fixate_field_nearest_int (structure, "channels",
ladspa->ladspa.klass->count.audio.out);
caps =
GST_BASE_SRC_CLASS (gst_ladspa_source_type_parent_class)->fixate
(base, caps);
return caps;
}
static GstCaps *
gst_inter_audio_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
GstStructure *structure;
GST_DEBUG_OBJECT (src, "fixate");
caps = gst_caps_make_writable (caps);
caps = gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (S16));
gst_structure_fixate_field_nearest_int (structure, "channels", 2);
gst_structure_fixate_field_nearest_int (structure, "rate", 48000);
gst_structure_fixate_field_string (structure, "layout", "interleaved");
return caps;
}
static GstCaps *
gst_lv2_source_fixate (GstBaseSrc * base, GstCaps * caps)
{
GstLV2Source *lv2 = (GstLV2Source *) base;
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (lv2, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_nearest_int (structure, "rate",
GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_string (structure, "format", GST_AUDIO_NE (F32));
gst_structure_fixate_field_nearest_int (structure, "channels",
lv2->lv2.klass->out_group.ports->len);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (base, caps);
return caps;
}
static GstCaps *
gst_audio_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstAudioTestSrc *src = GST_AUDIO_TEST_SRC (bsrc);
GstStructure *structure;
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (src, "fixating samplerate to %d", GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_nearest_int (structure, "rate",
GST_AUDIO_DEF_RATE);
gst_structure_fixate_field_string (structure, "format", DEFAULT_FORMAT_STR);
/* fixate to mono unless downstream requires stereo, for backwards compat */
gst_structure_fixate_field_nearest_int (structure, "channels", 1);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
static gboolean
gst_rtp_opus_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
{
gboolean res;
GstCaps *src_caps;
GstStructure *s;
char *encoding_name;
gint channels, rate;
const char *sprop_stereo = NULL;
char *sprop_maxcapturerate = NULL;
src_caps = gst_pad_get_allowed_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
if (src_caps) {
src_caps = gst_caps_make_writable (src_caps);
src_caps = gst_caps_truncate (src_caps);
s = gst_caps_get_structure (src_caps, 0);
gst_structure_fixate_field_string (s, "encoding-name", "OPUS");
encoding_name = g_strdup (gst_structure_get_string (s, "encoding-name"));
gst_caps_unref (src_caps);
} else {
encoding_name = g_strdup ("X-GST-OPUS-DRAFT-SPITTKA-00");
}
s = gst_caps_get_structure (caps, 0);
if (gst_structure_get_int (s, "channels", &channels)) {
if (channels > 2) {
GST_ERROR_OBJECT (payload,
"More than 2 channels with channel-mapping-family=0 is invalid");
return FALSE;
} else if (channels == 2) {
sprop_stereo = "1";
} else {
sprop_stereo = "0";
}
}
if (gst_structure_get_int (s, "rate", &rate)) {
sprop_maxcapturerate = g_strdup_printf ("%d", rate);
}
gst_rtp_base_payload_set_options (payload, "audio", FALSE,
encoding_name, 48000);
g_free (encoding_name);
if (sprop_maxcapturerate && sprop_stereo) {
res =
gst_rtp_base_payload_set_outcaps (payload, "sprop-maxcapturerate",
G_TYPE_STRING, sprop_maxcapturerate, "sprop-stereo", G_TYPE_STRING,
sprop_stereo, NULL);
} else if (sprop_maxcapturerate) {
res =
gst_rtp_base_payload_set_outcaps (payload, "sprop-maxcapturerate",
G_TYPE_STRING, sprop_maxcapturerate, NULL);
} else if (sprop_stereo) {
res =
gst_rtp_base_payload_set_outcaps (payload, "sprop-stereo",
G_TYPE_STRING, sprop_stereo, NULL);
} else {
res = gst_rtp_base_payload_set_outcaps (payload, NULL);
}
g_free (sprop_maxcapturerate);
return res;
}
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 gboolean
gst_video_rate_setcaps (GstPad * pad, GstCaps * caps)
{
GstVideoRate *videorate;
GstStructure *structure;
gboolean ret = TRUE;
GstPad *otherpad, *opeer;
gint rate_numerator, rate_denominator;
videorate = GST_VIDEO_RATE (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (pad, "setcaps called %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator))
goto no_framerate;
if (pad == videorate->srcpad) {
/* out_frame_count is scaled by the frame rate caps when calculating next_ts.
* when the frame rate caps change, we must update base_ts and reset
* out_frame_count */
if (videorate->to_rate_numerator) {
videorate->base_ts +=
gst_util_uint64_scale (videorate->out_frame_count,
videorate->to_rate_denominator * GST_SECOND,
videorate->to_rate_numerator);
}
videorate->out_frame_count = 0;
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
otherpad = videorate->sinkpad;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
otherpad = videorate->srcpad;
}
/* now try to find something for the peer */
opeer = gst_pad_get_peer (otherpad);
if (opeer) {
if (gst_pad_accept_caps (opeer, caps)) {
/* the peer accepts the caps as they are */
gst_pad_set_caps (otherpad, caps);
ret = TRUE;
} else {
GstCaps *peercaps;
GstCaps *transform = NULL;
ret = FALSE;
/* see how we can transform the input caps */
if (!gst_video_rate_transformcaps (pad, caps, otherpad, &transform))
goto no_transform;
/* see what the peer can do */
peercaps = gst_pad_get_caps (opeer);
GST_DEBUG_OBJECT (opeer, "icaps %" GST_PTR_FORMAT, peercaps);
GST_DEBUG_OBJECT (videorate, "transform %" GST_PTR_FORMAT, transform);
/* filter against our possibilities */
caps = gst_caps_intersect (peercaps, transform);
gst_caps_unref (peercaps);
gst_caps_unref (transform);
GST_DEBUG_OBJECT (videorate, "intersect %" GST_PTR_FORMAT, caps);
/* could turn up empty, due to e.g. colorspace etc */
if (gst_caps_get_size (caps) == 0) {
gst_caps_unref (caps);
goto no_transform;
}
/* take first possibility */
gst_caps_truncate (caps);
structure = gst_caps_get_structure (caps, 0);
/* and fixate */
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
rate_numerator, rate_denominator);
gst_structure_get_fraction (structure, "framerate",
&rate_numerator, &rate_denominator);
if (otherpad == videorate->srcpad) {
videorate->to_rate_numerator = rate_numerator;
videorate->to_rate_denominator = rate_denominator;
} else {
videorate->from_rate_numerator = rate_numerator;
videorate->from_rate_denominator = rate_denominator;
}
if (gst_structure_has_field (structure, "interlaced"))
gst_structure_fixate_field_boolean (structure, "interlaced", FALSE);
if (gst_structure_has_field (structure, "color-matrix"))
gst_structure_fixate_field_string (structure, "color-matrix", "sdtv");
if (gst_structure_has_field (structure, "chroma-site"))
gst_structure_fixate_field_string (structure, "chroma-site", "mpeg2");
if (gst_structure_has_field (structure, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (structure,
"pixel-aspect-ratio", 1, 1);
gst_pad_set_caps (otherpad, caps);
gst_caps_unref (caps);
ret = TRUE;
}
gst_object_unref (opeer);
}
done:
/* After a setcaps, our caps may have changed. In that case, we can't use
* the old buffer, if there was one (it might have different dimensions) */
GST_DEBUG_OBJECT (videorate, "swapping old buffers");
gst_video_rate_swap_prev (videorate, NULL, GST_CLOCK_TIME_NONE);
gst_object_unref (videorate);
return ret;
no_framerate:
{
GST_DEBUG_OBJECT (videorate, "no framerate specified");
goto done;
}
no_transform:
{
GST_DEBUG_OBJECT (videorate, "no framerate transform possible");
ret = FALSE;
goto done;
}
}