static av_cold int amrnb_decode_init(AVCodecContext *avctx) { AMRContext *p = avctx->priv_data; int i; if (avctx->channels > 1) { avpriv_report_missing_feature(avctx, "multi-channel AMR"); return AVERROR_PATCHWELCOME; } avctx->channels = 1; avctx->channel_layout = AV_CH_LAYOUT_MONO; if (!avctx->sample_rate) avctx->sample_rate = 8000; avctx->sample_fmt = AV_SAMPLE_FMT_FLT; // p->excitation always points to the same position in p->excitation_buf p->excitation = &p->excitation_buf[PITCH_DELAY_MAX + LP_FILTER_ORDER + 1]; for (i = 0; i < LP_FILTER_ORDER; i++) { p->prev_lsp_sub4[i] = lsp_sub4_init[i] * 1000 / (float)(1 << 15); p->lsf_avg[i] = p->lsf_q[3][i] = lsp_avg_init[i] / (float)(1 << 15); } for (i = 0; i < 4; i++) p->prediction_error[i] = MIN_ENERGY; ff_acelp_filter_init(&p->acelpf_ctx); ff_acelp_vectors_init(&p->acelpv_ctx); ff_celp_filter_init(&p->celpf_ctx); ff_celp_math_init(&p->celpm_ctx); return 0; }
static av_cold int amrnb_decode_init(AVCodecContext *avctx) { AMRContext *p = avctx->priv_data; int i; avctx->sample_fmt = AV_SAMPLE_FMT_FLT; // p->excitation always points to the same position in p->excitation_buf p->excitation = &p->excitation_buf[PITCH_DELAY_MAX + LP_FILTER_ORDER + 1]; for (i = 0; i < LP_FILTER_ORDER; i++) { p->prev_lsp_sub4[i] = lsp_sub4_init[i] * 1000 / (float)(1 << 15); p->lsf_avg[i] = p->lsf_q[3][i] = lsp_avg_init[i] / (float)(1 << 15); } for (i = 0; i < 4; i++) p->prediction_error[i] = MIN_ENERGY; avcodec_get_frame_defaults(&p->avframe); avctx->coded_frame = &p->avframe; ff_acelp_filter_init(&p->acelpf_ctx); ff_acelp_vectors_init(&p->acelpv_ctx); ff_celp_filter_init(&p->celpf_ctx); ff_celp_math_init(&p->celpm_ctx); return 0; }
static av_cold int amrwb_decode_init(AVCodecContext *avctx) { AMRWBContext *ctx = avctx->priv_data; int i; avctx->sample_fmt = AV_SAMPLE_FMT_FLT; av_lfg_init(&ctx->prng, 1); ctx->excitation = &ctx->excitation_buf[AMRWB_P_DELAY_MAX + LP_ORDER + 1]; ctx->first_frame = 1; for (i = 0; i < LP_ORDER; i++) ctx->isf_past_final[i] = isf_init[i] * (1.0f / (1 << 15)); for (i = 0; i < 4; i++) ctx->prediction_error[i] = MIN_ENERGY; avcodec_get_frame_defaults(&ctx->avframe); avctx->coded_frame = &ctx->avframe; ff_acelp_filter_init(&ctx->acelpf_ctx); ff_acelp_vectors_init(&ctx->acelpv_ctx); ff_celp_filter_init(&ctx->celpf_ctx); ff_celp_math_init(&ctx->celpm_ctx); return 0; }
static av_cold int amrwb_decode_init(AVCodecContext *avctx) { AMRWBContext *ctx = avctx->priv_data; int i; if (avctx->channels > 1) { avpriv_report_missing_feature(avctx, "multi-channel AMR"); return AVERROR_PATCHWELCOME; } avctx->channels = 1; avctx->channel_layout = AV_CH_LAYOUT_MONO; if (!avctx->sample_rate) avctx->sample_rate = 16000; avctx->sample_fmt = AV_SAMPLE_FMT_FLT; av_lfg_init(&ctx->prng, 1); ctx->excitation = &ctx->excitation_buf[AMRWB_P_DELAY_MAX + LP_ORDER + 1]; ctx->first_frame = 1; for (i = 0; i < LP_ORDER; i++) ctx->isf_past_final[i] = isf_init[i] * (1.0f / (1 << 15)); for (i = 0; i < 4; i++) ctx->prediction_error[i] = MIN_ENERGY; ff_acelp_filter_init(&ctx->acelpf_ctx); ff_acelp_vectors_init(&ctx->acelpv_ctx); ff_celp_filter_init(&ctx->celpf_ctx); ff_celp_math_init(&ctx->celpm_ctx); return 0; }