-int AAC_RENAME(ff_ps_read_data)(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)
-{
- int e;
- int bit_count_start = get_bits_count(gb_host);
- int header;
- int bits_consumed;
- GetBitContext gbc = *gb_host, *gb = &gbc;
-
- header = get_bits1(gb);
- if (header) { //enable_ps_header
- ps->enable_iid = get_bits1(gb);
- if (ps->enable_iid) {
- int iid_mode = get_bits(gb, 3);
- if (iid_mode > 5) {
- av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n",
- iid_mode);
- goto err;
- }
- ps->nr_iid_par = nr_iidicc_par_tab[iid_mode];
- ps->iid_quant = iid_mode > 2;
- ps->nr_ipdopd_par = nr_iidopd_par_tab[iid_mode];
- }
- ps->enable_icc = get_bits1(gb);
- if (ps->enable_icc) {
- ps->icc_mode = get_bits(gb, 3);
- if (ps->icc_mode > 5) {
- av_log(avctx, AV_LOG_ERROR, "icc_mode %d is reserved.\n",
- ps->icc_mode);
- goto err;
- }
- ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode];
- }
- ps->enable_ext = get_bits1(gb);
- }
-
- ps->frame_class = get_bits1(gb);
- ps->num_env_old = ps->num_env;
- ps->num_env = num_env_tab[ps->frame_class][get_bits(gb, 2)];
-
- ps->border_position[0] = -1;
- if (ps->frame_class) {
- for (e = 1; e <= ps->num_env; e++) {
- ps->border_position[e] = get_bits(gb, 5);
- if (ps->border_position[e] < ps->border_position[e-1]) {
- av_log(avctx, AV_LOG_ERROR, "border_position non monotone.\n");
- goto err;
- }
- }
- } else
- for (e = 1; e <= ps->num_env; e++)
- ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env]) - 1;
-
- if (ps->enable_iid) {
- for (e = 0; e < ps->num_env; e++) {
- int dt = get_bits1(gb);
- if (read_iid_data(avctx, gb, ps, ps->iid_par, huff_iid[2*dt+ps->iid_quant], e, dt))
- goto err;
- }
- } else
- memset(ps->iid_par, 0, sizeof(ps->iid_par));
-
- if (ps->enable_icc)
- for (e = 0; e < ps->num_env; e++) {
- int dt = get_bits1(gb);
- if (read_icc_data(avctx, gb, ps, ps->icc_par, dt ? huff_icc_dt : huff_icc_df, e, dt))
- goto err;
- }
- else
- memset(ps->icc_par, 0, sizeof(ps->icc_par));
-
- if (ps->enable_ext) {
- int cnt = get_bits(gb, 4);
- if (cnt == 15) {
- cnt += get_bits(gb, 8);
- }
- cnt *= 8;
- while (cnt > 7) {
- int ps_extension_id = get_bits(gb, 2);
- cnt -= 2 + ps_read_extension_data(gb, ps, ps_extension_id);
- }
- if (cnt < 0) {
- av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d\n", cnt);
- goto err;
- }
- skip_bits(gb, cnt);
- }
-
- ps->enable_ipdopd &= !PS_BASELINE;
-
- //Fix up envelopes
- if (!ps->num_env || ps->border_position[ps->num_env] < numQMFSlots - 1) {
- //Create a fake envelope
- int source = ps->num_env ? ps->num_env - 1 : ps->num_env_old - 1;
- int b;
- if (source >= 0 && source != ps->num_env) {
- if (ps->enable_iid) {
- memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->iid_par[0]));
- }
- if (ps->enable_icc) {
- memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->icc_par[0]));
- }
- if (ps->enable_ipdopd) {
- memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->ipd_par[0]));
- memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->opd_par[0]));
- }
- }
- if (ps->enable_iid){
- for (b = 0; b < ps->nr_iid_par; b++) {
- if (FFABS(ps->iid_par[ps->num_env][b]) > 7 + 8 * ps->iid_quant) {
- av_log(avctx, AV_LOG_ERROR, "iid_par invalid\n");
- goto err;
- }
- }
- }
- if (ps->enable_icc){
- for (b = 0; b < ps->nr_iid_par; b++) {
- if (ps->icc_par[ps->num_env][b] > 7U) {
- av_log(avctx, AV_LOG_ERROR, "icc_par invalid\n");
- goto err;
- }
- }
- }
- ps->num_env++;
- ps->border_position[ps->num_env] = numQMFSlots - 1;
- }
-
-
- ps->is34bands_old = ps->is34bands;
- if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc))
- ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) ||
- (ps->enable_icc && ps->nr_icc_par == 34);
-
- //Baseline
- if (!ps->enable_ipdopd) {
- memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
- memset(ps->opd_par, 0, sizeof(ps->opd_par));
- }
-
- if (header)
- ps->start = 1;
-
- bits_consumed = get_bits_count(gb) - bit_count_start;
- if (bits_consumed <= bits_left) {
- skip_bits_long(gb_host, bits_consumed);
- return bits_consumed;
- }
- av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n", bits_left, bits_consumed);
-err:
- ps->start = 0;
- skip_bits_long(gb_host, bits_left);
- memset(ps->iid_par, 0, sizeof(ps->iid_par));
- memset(ps->icc_par, 0, sizeof(ps->icc_par));
- memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
- memset(ps->opd_par, 0, sizeof(ps->opd_par));
- return bits_left;
-}
-