void assign_bits(Backend& val, Unsigned bits, unsigned bit_location, unsigned chunk_bits, const mpl::false_& tag)
{
unsigned limb = bit_location / (sizeof(limb_type) * CHAR_BIT);
unsigned shift = bit_location % (sizeof(limb_type) * CHAR_BIT);
limb_type mask = chunk_bits >= sizeof(limb_type) * CHAR_BIT ? ~static_cast<limb_type>(0u) : (static_cast<limb_type>(1u) << chunk_bits) - 1;
limb_type value = static_cast<limb_type>(bits & mask) << shift;
if(value)
{
if(val.size() == limb)
{
val.resize(limb + 1, limb + 1);
if(val.size() > limb)
val.limbs()[limb] = value;
}
else if(val.size() > limb)
val.limbs()[limb] |= value;
}
if(chunk_bits > sizeof(limb_type) * CHAR_BIT - shift)
{
shift = sizeof(limb_type) * CHAR_BIT - shift;
chunk_bits -= shift;
bit_location += shift;
bits >>= shift;
if(bits)
assign_bits(val, bits, bit_location, chunk_bits, tag);
}
static int encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
const AVFrame *frame, int *got_packet_ptr)
{
DCAEncContext *c = avctx->priv_data;
const int32_t *samples;
int ret, i;
if ((ret = ff_alloc_packet2(avctx, avpkt, c->frame_size, 0)) < 0)
return ret;
samples = (const int32_t *)frame->data[0];
subband_transform(c, samples);
if (c->lfe_channel)
lfe_downsample(c, samples);
calc_masking(c, samples);
find_peaks(c);
assign_bits(c);
calc_scales(c);
quantize_all(c);
shift_history(c, samples);
init_put_bits(&c->pb, avpkt->data, avpkt->size);
put_frame_header(c);
put_primary_audio_header(c);
for (i = 0; i < SUBFRAMES; i++)
put_subframe(c, i);
for (i = put_bits_count(&c->pb); i < 8*c->frame_size; i++)
put_bits(&c->pb, 1, 0);
flush_put_bits(&c->pb);
avpkt->pts = frame->pts;
avpkt->duration = ff_samples_to_time_base(avctx, frame->nb_samples);
avpkt->size = put_bits_count(&c->pb) >> 3;
*got_packet_ptr = 1;
return 0;
}