/*
* Get frames in the packet.
*/
static pj_status_t codec_parse( pjmedia_codec *codec,
void *pkt,
pj_size_t pkt_size,
const pj_timestamp *ts,
unsigned *frame_cnt,
pjmedia_frame frames[] )
{
struct opus_data *opus_data = (struct opus_data *)codec->codec_data;
unsigned char tmp_buf[MAX_ENCODED_PACKET_SIZE];
int i, num_frames;
int size, out_pos;
unsigned samples_per_frame;
#if (USE_INCOMING_WORSE_SETTINGS)
int bw;
#endif
pj_mutex_lock (opus_data->mutex);
if (pkt_size > sizeof(tmp_buf)) {
PJ_LOG(5, (THIS_FILE, "Encoded size bigger than buffer"));
pj_mutex_unlock (opus_data->mutex);
return PJMEDIA_CODEC_EFRMTOOSHORT;
}
samples_per_frame = (opus_data->cfg.sample_rate *
opus_data->ptime) / 1000;
pj_memcpy(tmp_buf, pkt, pkt_size);
opus_repacketizer_init(opus_data->dec_packer);
opus_repacketizer_cat(opus_data->dec_packer, tmp_buf, pkt_size);
num_frames = opus_repacketizer_get_nb_frames(opus_data->dec_packer);
out_pos = 0;
for (i = 0; i < num_frames; ++i) {
size = opus_repacketizer_out_range(opus_data->dec_packer, i, i+1,
((unsigned char*)pkt) + out_pos,
sizeof(tmp_buf));
if (size < 0) {
PJ_LOG(5, (THIS_FILE, "Parse failed! (%d)", pkt_size));
pj_mutex_unlock (opus_data->mutex);
return PJMEDIA_CODEC_EFAILED;
}
frames[i].type = PJMEDIA_FRAME_TYPE_AUDIO;
frames[i].buf = ((char*)pkt) + out_pos;
frames[i].size = size;
frames[i].timestamp.u64 = ts->u64 + i * samples_per_frame;
out_pos += size;
}
*frame_cnt = num_frames;
pj_mutex_unlock (opus_data->mutex);
return PJ_SUCCESS;
}
/*
* Encode frame.
*/
static pj_status_t codec_encode( pjmedia_codec *codec,
const struct pjmedia_frame *input,
unsigned output_buf_len,
struct pjmedia_frame *output )
{
struct opus_data *opus_data = (struct opus_data *)codec->codec_data;
opus_int32 size = 0;
unsigned in_pos = 0;
unsigned out_pos = 0;
unsigned frame_size;
unsigned samples_per_frame;
unsigned char tmp_buf[MAX_ENCODED_PACKET_SIZE];
unsigned tmp_bytes_left = sizeof(tmp_buf);
pj_mutex_lock (opus_data->mutex);
samples_per_frame = (opus_data->cfg.sample_rate *
opus_data->ptime) / 1000;
frame_size = samples_per_frame * opus_data->cfg.channel_cnt *
sizeof(opus_int16);
opus_repacketizer_init(opus_data->enc_packer);
while (input->size - in_pos >= frame_size) {
size = opus_encode(opus_data->enc,
(const opus_int16*)(((char*)input->buf) + in_pos),
samples_per_frame,
tmp_buf + out_pos,
(tmp_bytes_left < frame_size ?
tmp_bytes_left : frame_size));
if (size < 0) {
PJ_LOG(4, (THIS_FILE, "Encode failed! (%d)", size));
pj_mutex_unlock (opus_data->mutex);
return PJMEDIA_CODEC_EFAILED;
} else if (size > 0) {
/* Only add packets containing more than the TOC */
opus_repacketizer_cat(opus_data->enc_packer,
tmp_buf + out_pos,
size);
out_pos += size;
tmp_bytes_left -= size;
}
in_pos += frame_size;
}
if (!opus_repacketizer_get_nb_frames(opus_data->enc_packer)) {
/* Empty packet */
output->size = 0;
output->type = PJMEDIA_FRAME_TYPE_NONE;
output->timestamp = input->timestamp;
}
if (size) {
size = opus_repacketizer_out(opus_data->enc_packer,
output->buf,
output_buf_len);
if (size < 0) {
PJ_LOG(4, (THIS_FILE, "Encode failed! (%d), out_size: %u",
size, output_buf_len));
pj_mutex_unlock (opus_data->mutex);
return PJMEDIA_CODEC_EFAILED;
}
}
output->size = (unsigned)size;
output->type = PJMEDIA_FRAME_TYPE_AUDIO;
output->timestamp = input->timestamp;
pj_mutex_unlock (opus_data->mutex);
return PJ_SUCCESS;
}
int opus_multistream_encode_float(
#endif
OpusMSEncoder *st,
const opus_val16 *pcm,
int frame_size,
unsigned char *data,
opus_int32 max_data_bytes
)
{
int coupled_size;
int mono_size;
int s, i;
char *ptr;
int tot_size;
VARDECL(opus_val16, buf);
unsigned char tmp_data[MS_FRAME_TMP];
OpusRepacketizer rp;
ALLOC_STACK;
ALLOC(buf, 2*frame_size, opus_val16);
ptr = (char*)st + align(sizeof(OpusMSEncoder));
coupled_size = opus_encoder_get_size(2);
mono_size = opus_encoder_get_size(1);
if (max_data_bytes < 4*st->layout.nb_streams-1)
{
RESTORE_STACK;
return OPUS_BUFFER_TOO_SMALL;
}
/* Counting ToC */
tot_size = 0;
for (s=0;s<st->layout.nb_streams;s++)
{
OpusEncoder *enc;
int len;
int curr_max;
opus_repacketizer_init(&rp);
enc = (OpusEncoder*)ptr;
if (s < st->layout.nb_coupled_streams)
{
int left, right;
left = get_left_channel(&st->layout, s, -1);
right = get_right_channel(&st->layout, s, -1);
for (i=0;i<frame_size;i++)
{
buf[2*i] = pcm[st->layout.nb_channels*i+left];
buf[2*i+1] = pcm[st->layout.nb_channels*i+right];
}
ptr += align(coupled_size);
} else {
int chan = get_mono_channel(&st->layout, s, -1);
for (i=0;i<frame_size;i++)
buf[i] = pcm[st->layout.nb_channels*i+chan];
ptr += align(mono_size);
}
/* number of bytes left (+Toc) */
curr_max = max_data_bytes - tot_size;
/* Reserve three bytes for the last stream and four for the others */
curr_max -= IMAX(0,4*(st->layout.nb_streams-s-1)-1);
curr_max = IMIN(curr_max,MS_FRAME_TMP);
len = opus_encode_native(enc, buf, frame_size, tmp_data, curr_max);
if (len<0)
{
RESTORE_STACK;
return len;
}
/* We need to use the repacketizer to add the self-delimiting lengths
while taking into account the fact that the encoder can now return
more than one frame at a time (e.g. 60 ms CELT-only) */
opus_repacketizer_cat(&rp, tmp_data, len);
len = opus_repacketizer_out_range_impl(&rp, 0, opus_repacketizer_get_nb_frames(&rp), data, max_data_bytes-tot_size, s != st->layout.nb_streams-1);
data += len;
tot_size += len;
}
RESTORE_STACK;
return tot_size;
}
