static gboolean
gst_opus_enc_setup (GstOpusEnc * enc)
{
int error = OPUS_OK;
#ifndef GST_DISABLE_DEBUG
GST_DEBUG_OBJECT (enc,
"setup: %d Hz, %d channels, %d stereo streams, family %d",
enc->sample_rate, enc->n_channels, enc->n_stereo_streams,
enc->channel_mapping_family);
GST_INFO_OBJECT (enc, "Mapping tables built: %d channels, %d stereo streams",
enc->n_channels, enc->n_stereo_streams);
gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug,
"Encoding mapping table", enc->n_channels, enc->encoding_channel_mapping);
gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug,
"Decoding mapping table", enc->n_channels, enc->decoding_channel_mapping);
#endif
enc->state = opus_multistream_encoder_create (enc->sample_rate,
enc->n_channels, enc->n_channels - enc->n_stereo_streams,
enc->n_stereo_streams, enc->encoding_channel_mapping,
enc->audio_or_voip ? OPUS_APPLICATION_AUDIO : OPUS_APPLICATION_VOIP,
&error);
if (!enc->state || error != OPUS_OK)
goto encoder_creation_failed;
opus_multistream_encoder_ctl (enc->state, OPUS_SET_BITRATE (enc->bitrate), 0);
opus_multistream_encoder_ctl (enc->state, OPUS_SET_BANDWIDTH (enc->bandwidth),
0);
opus_multistream_encoder_ctl (enc->state, OPUS_SET_VBR (!enc->cbr), 0);
opus_multistream_encoder_ctl (enc->state,
OPUS_SET_VBR_CONSTRAINT (enc->constrained_vbr), 0);
opus_multistream_encoder_ctl (enc->state,
OPUS_SET_COMPLEXITY (enc->complexity), 0);
opus_multistream_encoder_ctl (enc->state,
OPUS_SET_INBAND_FEC (enc->inband_fec), 0);
opus_multistream_encoder_ctl (enc->state, OPUS_SET_DTX (enc->dtx), 0);
opus_multistream_encoder_ctl (enc->state,
OPUS_SET_PACKET_LOSS_PERC (enc->packet_loss_percentage), 0);
GST_LOG_OBJECT (enc, "we have frame size %d", enc->frame_size);
return TRUE;
encoder_creation_failed:
GST_ERROR_OBJECT (enc, "Encoder creation failed");
return FALSE;
}
krad_opus_t *krad_opus_encoder_create (int channels, int input_sample_rate, int bitrate, int application) {
int c;
krad_opus_t *krad_opus = calloc(1, sizeof(krad_opus_t));
krad_opus->opus_header = calloc(1, sizeof(OpusHeader));
krad_opus->input_sample_rate = input_sample_rate;
krad_opus->channels = channels;
krad_opus->bitrate = bitrate;
krad_opus->application = application;
krad_opus->complexity = DEFAULT_OPUS_COMPLEXITY;
krad_opus->signal = OPUS_AUTO;
krad_opus->frame_size = DEFAULT_OPUS_FRAME_SIZE;
krad_opus->bandwidth = OPUS_BANDWIDTH_FULLBAND;
krad_opus->new_frame_size = krad_opus->frame_size;
krad_opus->new_complexity = krad_opus->complexity;
krad_opus->new_bitrate = krad_opus->bitrate;
krad_opus->new_signal = krad_opus->signal;
krad_opus->new_bandwidth = krad_opus->bandwidth;
for (c = 0; c < krad_opus->channels; c++) {
krad_opus->ringbuf[c] = krad_ringbuffer_create (RINGBUFFER_SIZE);
krad_opus->resampled_ringbuf[c] = krad_ringbuffer_create (RINGBUFFER_SIZE);
krad_opus->samples[c] = malloc(16 * 8192);
krad_opus->resampled_samples[c] = malloc(16 * 8192);
krad_opus->src_resampler[c] = src_new (KRAD_OPUS_SRC_QUALITY, 1, &krad_opus->src_error[c]);
if (krad_opus->src_resampler[c] == NULL) {
failfast ("Krad Opus Encoder: src resampler error: %s", src_strerror (krad_opus->src_error[c]));
}
krad_opus->src_data[c].src_ratio = 48000.0 / krad_opus->input_sample_rate;
}
if (krad_opus->channels < 3) {
krad_opus->streams = 1;
if (krad_opus->channels == 2) {
krad_opus->coupled_streams = 1;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 1;
} else {
krad_opus->coupled_streams = 0;
krad_opus->mapping[0] = 0;
}
krad_opus->opus_header->channel_mapping = 0;
} else {
krad_opus->opus_header->channel_mapping = 1;
switch (krad_opus->channels) {
case 3:
krad_opus->streams = 2;
krad_opus->coupled_streams = 1;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 1;
krad_opus->mapping[2] = 2;
case 4:
krad_opus->streams = 2;
krad_opus->coupled_streams = 2;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 1;
krad_opus->mapping[2] = 2;
krad_opus->mapping[3] = 3;
case 5:
krad_opus->streams = 3;
krad_opus->coupled_streams = 2;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 4;
krad_opus->mapping[2] = 1;
krad_opus->mapping[3] = 2;
krad_opus->mapping[4] = 3;
case 6:
krad_opus->streams = 4;
krad_opus->coupled_streams = 2;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 4;
krad_opus->mapping[2] = 1;
krad_opus->mapping[3] = 2;
krad_opus->mapping[4] = 3;
krad_opus->mapping[5] = 5;
case 7:
krad_opus->streams = 5;
krad_opus->coupled_streams = 2;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 4;
krad_opus->mapping[2] = 1;
krad_opus->mapping[3] = 2;
krad_opus->mapping[4] = 3;
krad_opus->mapping[5] = 5;
krad_opus->mapping[6] = 6;
case 8:
krad_opus->streams = 5;
krad_opus->coupled_streams = 3;
krad_opus->mapping[0] = 0;
krad_opus->mapping[1] = 6;
krad_opus->mapping[2] = 1;
krad_opus->mapping[3] = 2;
krad_opus->mapping[4] = 3;
krad_opus->mapping[5] = 4;
krad_opus->mapping[6] = 5;
krad_opus->mapping[7] = 7;
}
}
krad_opus->opus_header->channels = krad_opus->channels;
krad_opus->opus_header->nb_streams = krad_opus->streams;
krad_opus->opus_header->nb_coupled = krad_opus->coupled_streams;
memcpy (krad_opus->opus_header->stream_map, krad_opus->mapping, 256);
krad_opus->encoder = opus_multistream_encoder_create (48000,
krad_opus->channels,
krad_opus->streams,
krad_opus->coupled_streams,
krad_opus->mapping,
krad_opus->application,
&krad_opus->err);
if (krad_opus->err != OPUS_OK) {
failfast ("Krad Opus Encoder: Cannot create encoder: %s", opus_strerror (krad_opus->err));
}
opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_GET_LOOKAHEAD (&krad_opus->lookahead));
krad_opus->opus_header->preskip = krad_opus->lookahead;
krad_opus->opus_header->gain = 0;
krad_opus->opus_header->input_sample_rate = 48000;
if (opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_SET_BITRATE (krad_opus->bitrate)) != OPUS_OK) {
failfast ("Krad Opus Encoder: bitrate request failed");
}
krad_opus->header_data_size = opus_header_to_packet (krad_opus->opus_header, krad_opus->header_data, 100);
krad_opus->krad_codec_header.codec = OPUS;
krad_opus->krad_codec_header.header[0] = krad_opus->header_data;
krad_opus->krad_codec_header.header_size[0] = krad_opus->header_data_size;
krad_opus->krad_codec_header.header_combined = krad_opus->header_data;
krad_opus->krad_codec_header.header_combined_size = krad_opus->header_data_size;
krad_opus->krad_codec_header.header_count = 2;
krad_opus->krad_codec_header.header_size[1] =
8 + 4 + strlen (opus_get_version_string ()) + 4 + 4 + strlen ("ENCODER=") + strlen (APPVERSION);
krad_opus->opustags_header = calloc (1, krad_opus->krad_codec_header.header_size[1]);
memcpy (krad_opus->opustags_header, "OpusTags", 8);
krad_opus->opustags_header[8] = strlen (opus_get_version_string ());
memcpy (krad_opus->opustags_header + 12, opus_get_version_string (), strlen (opus_get_version_string ()));
krad_opus->opustags_header[12 + strlen (opus_get_version_string ())] = 1;
krad_opus->opustags_header[12 + strlen (opus_get_version_string ()) + 4] = strlen ("ENCODER=") + strlen (APPVERSION);
memcpy (krad_opus->opustags_header + 12 + strlen (opus_get_version_string ()) + 4 + 4, "ENCODER=", strlen ("ENCODER="));
memcpy (krad_opus->opustags_header + 12 + strlen (opus_get_version_string ()) + 4 + 4 + strlen ("ENCODER="),
APPVERSION,
strlen (APPVERSION));
krad_opus->krad_codec_header.header[1] = krad_opus->opustags_header;
return krad_opus;
}
