static int dcadec_decode_frame(AVCodecContext *avctx, void *data,
                               int *got_frame_ptr, AVPacket *avpkt)
{
    DCAContext *s = avctx->priv_data;
    AVFrame *frame = data;
    uint8_t *input = avpkt->data;
    int input_size = avpkt->size;
    int i, ret, prev_packet = s->packet;
    uint32_t mrk;

    if (input_size < MIN_PACKET_SIZE || input_size > MAX_PACKET_SIZE) {
        av_log(avctx, AV_LOG_ERROR, "Invalid packet size\n");
        return AVERROR_INVALIDDATA;
    }

    // Convert input to BE format
    mrk = AV_RB32(input);
    if (mrk != DCA_SYNCWORD_CORE_BE && mrk != DCA_SYNCWORD_SUBSTREAM) {
        av_fast_padded_malloc(&s->buffer, &s->buffer_size, input_size);
        if (!s->buffer)
            return AVERROR(ENOMEM);

        for (i = 0, ret = AVERROR_INVALIDDATA; i < input_size - MIN_PACKET_SIZE + 1 && ret < 0; i++)
            ret = avpriv_dca_convert_bitstream(input + i, input_size - i, s->buffer, s->buffer_size);

        if (ret < 0) {
            av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n");
            return ret;
        }

        input      = s->buffer;
        input_size = ret;
    }

    s->packet = 0;

    // Parse backward compatible core sub-stream
    if (AV_RB32(input) == DCA_SYNCWORD_CORE_BE) {
        int frame_size;

        if ((ret = ff_dca_core_parse(&s->core, input, input_size)) < 0)
            return ret;

        s->packet |= DCA_PACKET_CORE;

        // EXXS data must be aligned on 4-byte boundary
        frame_size = FFALIGN(s->core.frame_size, 4);
        if (input_size - 4 > frame_size) {
            input      += frame_size;
            input_size -= frame_size;
        }
    }

    if (!s->core_only) {
        DCAExssAsset *asset = NULL;

        // Parse extension sub-stream (EXSS)
        if (AV_RB32(input) == DCA_SYNCWORD_SUBSTREAM) {
            if ((ret = ff_dca_exss_parse(&s->exss, input, input_size)) < 0) {
                if (avctx->err_recognition & AV_EF_EXPLODE)
                    return ret;
            } else {
                s->packet |= DCA_PACKET_EXSS;
                asset = &s->exss.assets[0];
            }
        }

        // Parse XLL component in EXSS
        if (asset && (asset->extension_mask & DCA_EXSS_XLL)) {
            if ((ret = ff_dca_xll_parse(&s->xll, input, asset)) < 0) {
                // Conceal XLL synchronization error
                if (ret == AVERROR(EAGAIN)
                    && (prev_packet & DCA_PACKET_XLL)
                    && (s->packet & DCA_PACKET_CORE))
                    s->packet |= DCA_PACKET_XLL | DCA_PACKET_RECOVERY;
                else if (ret == AVERROR(ENOMEM) || (avctx->err_recognition & AV_EF_EXPLODE))
                    return ret;
            } else {
                s->packet |= DCA_PACKET_XLL;
            }
        }

        // Parse LBR component in EXSS
        if (asset && (asset->extension_mask & DCA_EXSS_LBR)) {
            if ((ret = ff_dca_lbr_parse(&s->lbr, input, asset)) < 0) {
                if (ret == AVERROR(ENOMEM) || (avctx->err_recognition & AV_EF_EXPLODE))
                    return ret;
            } else {
                s->packet |= DCA_PACKET_LBR;
            }
        }

        // Parse core extensions in EXSS or backward compatible core sub-stream
        if ((s->packet & DCA_PACKET_CORE)
            && (ret = ff_dca_core_parse_exss(&s->core, input, asset)) < 0)
            return ret;
    }

    // Filter the frame
    if (s->packet & DCA_PACKET_LBR) {
        if ((ret = ff_dca_lbr_filter_frame(&s->lbr, frame)) < 0)
            return ret;
    } else if (s->packet & DCA_PACKET_XLL) {
        if (s->packet & DCA_PACKET_CORE) {
            int x96_synth = -1;

            // Enable X96 synthesis if needed
            if (s->xll.chset[0].freq == 96000 && s->core.sample_rate == 48000)
                x96_synth = 1;

            if ((ret = ff_dca_core_filter_fixed(&s->core, x96_synth)) < 0)
                return ret;

            // Force lossy downmixed output on the first core frame filtered.
            // This prevents audible clicks when seeking and is consistent with
            // what reference decoder does when there are multiple channel sets.
            if (!(prev_packet & DCA_PACKET_RESIDUAL) && s->xll.nreschsets > 0
                && s->xll.nchsets > 1) {
                av_log(avctx, AV_LOG_VERBOSE, "Forcing XLL recovery mode\n");
                s->packet |= DCA_PACKET_RECOVERY;
            }

            // Set 'residual ok' flag for the next frame
            s->packet |= DCA_PACKET_RESIDUAL;
        }

        if ((ret = ff_dca_xll_filter_frame(&s->xll, frame)) < 0) {
            // Fall back to core unless hard error
            if (!(s->packet & DCA_PACKET_CORE))
                return ret;
            if (ret != AVERROR_INVALIDDATA || (avctx->err_recognition & AV_EF_EXPLODE))
                return ret;
            if ((ret = ff_dca_core_filter_frame(&s->core, frame)) < 0)
                return ret;
        }
    } else if (s->packet & DCA_PACKET_CORE) {
        if ((ret = ff_dca_core_filter_frame(&s->core, frame)) < 0)
            return ret;
        if (s->core.filter_mode & DCA_FILTER_MODE_FIXED)
            s->packet |= DCA_PACKET_RESIDUAL;
    } else {
        av_log(avctx, AV_LOG_ERROR, "No valid DCA sub-stream found\n");
        if (s->core_only)
            av_log(avctx, AV_LOG_WARNING, "Consider disabling 'core_only' option\n");
        return AVERROR_INVALIDDATA;
    }

    *got_frame_ptr = 1;

    return avpkt->size;
}