static int mlp_parse(AVCodecParserContext *s,

                     AVCodecContext *avctx,

                     const uint8_t **poutbuf, int *poutbuf_size,

                     const uint8_t *buf, int buf_size)

{

    MLPParseContext *mp = s->priv_data;

    int sync_present;

    uint8_t parity_bits;

    int next;

    int i, p = 0;



    *poutbuf_size = 0;

    if (buf_size == 0)

        return 0;



    if (!mp->in_sync) {

        // Not in sync - find a major sync header



        for (i = 0; i < buf_size; i++) {

            mp->pc.state = (mp->pc.state << 8) | buf[i];

            if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&

                // ignore if we do not have the data for the start of header

                mp->pc.index + i >= 7) {

                mp->in_sync = 1;

                mp->bytes_left = 0;

                break;

            }

        }



        if (!mp->in_sync) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size);

            return buf_size;

        }



        ff_combine_frame(&mp->pc, i - 7, &buf, &buf_size);



        return i - 7;

    }



    if (mp->bytes_left == 0) {

        // Find length of this packet



        /* Copy overread bytes from last frame into buffer. */

        for(; mp->pc.overread>0; mp->pc.overread--) {

            mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++];

        }



        if (mp->pc.index + buf_size < 2) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size);

            return buf_size;

        }



        mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)

                       |  (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);

        mp->bytes_left = (mp->bytes_left & 0xfff) * 2;

        if (mp->bytes_left <= 0) { // prevent infinite loop

            goto lost_sync;

        }

        mp->bytes_left -= mp->pc.index;

    }



    next = (mp->bytes_left > buf_size) ? END_NOT_FOUND : mp->bytes_left;



    if (ff_combine_frame(&mp->pc, next, &buf, &buf_size) < 0) {

        mp->bytes_left -= buf_size;

        return buf_size;

    }



    mp->bytes_left = 0;



    sync_present = (AV_RB32(buf + 4) & 0xfffffffe) == 0xf8726fba;



    if (!sync_present) {

        /* The first nibble of a frame is a parity check of the 4-byte

         * access unit header and all the 2- or 4-byte substream headers. */

        // Only check when this isn't a sync frame - syncs have a checksum.



        parity_bits = 0;

        for (i = -1; i < mp->num_substreams; i++) {

            parity_bits ^= buf[p++];

            parity_bits ^= buf[p++];



            if (i < 0 || buf[p-2] & 0x80) {

                parity_bits ^= buf[p++];

                parity_bits ^= buf[p++];

            }

        }



        if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) {

            av_log(avctx, AV_LOG_INFO, "mlpparse: Parity check failed.\n");

            goto lost_sync;

        }

    } else {

        GetBitContext gb;

        MLPHeaderInfo mh;



        init_get_bits(&gb, buf + 4, (buf_size - 4) << 3);

        if (ff_mlp_read_major_sync(avctx, &mh, &gb) < 0)

            goto lost_sync;



        avctx->bits_per_raw_sample = mh.group1_bits;

        if (avctx->bits_per_raw_sample > 16)

            avctx->sample_fmt = AV_SAMPLE_FMT_S32;

        else

            avctx->sample_fmt = AV_SAMPLE_FMT_S16;

        avctx->sample_rate = mh.group1_samplerate;

        s->duration = mh.access_unit_size;




        if (mh.stream_type == 0xbb) {

            /* MLP stream */

            avctx->channels = mlp_channels[mh.channels_mlp];

            avctx->channel_layout = ff_mlp_layout[mh.channels_mlp];

        } else { /* mh.stream_type == 0xba */

            /* TrueHD stream */

            if (mh.channels_thd_stream2) {

                avctx->channels = truehd_channels(mh.channels_thd_stream2);

                avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream2);

            } else {

                avctx->channels = truehd_channels(mh.channels_thd_stream1);

                avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream1);

            }

        }

        }



        if (!mh.is_vbr) /* Stream is CBR */

            avctx->bit_rate = mh.peak_bitrate;



        mp->num_substreams = mh.num_substreams;

    }



    *poutbuf = buf;

    *poutbuf_size = buf_size;



    return next;



lost_sync:

    mp->in_sync = 0;

    return 1;

}
static int mlp_parse(AVCodecParserContext *s,

                     AVCodecContext *avctx,

                     const uint8_t **poutbuf, int *poutbuf_size,

                     const uint8_t *buf, int buf_size)

{

    MLPParseContext *mp = s->priv_data;

    int sync_present;

    uint8_t parity_bits;

    int next;

    int i, p = 0;



    *poutbuf_size = 0;

    if (buf_size == 0)

        return 0;



    if (!mp->in_sync) {

        



        for (i = 0; i < buf_size; i++) {

            mp->pc.state = (mp->pc.state << 8) | buf[i];

            if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&

                

                mp->pc.index + i >= 7) {

                mp->in_sync = 1;

                mp->bytes_left = 0;

                break;

            }

        }



        if (!mp->in_sync) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size);

            return buf_size;

        }



        ff_combine_frame(&mp->pc, i - 7, &buf, &buf_size);



        return i - 7;

    }



    if (mp->bytes_left == 0) {

        



        

        for(; mp->pc.overread>0; mp->pc.overread--) {

            mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++];

        }



        if (mp->pc.index + buf_size < 2) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &buf, &buf_size);

            return buf_size;

        }



        mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : buf[0]) << 8)

                       |  (mp->pc.index > 1 ? mp->pc.buffer[1] : buf[1-mp->pc.index]);

        mp->bytes_left = (mp->bytes_left & 0xfff) * 2;

        if (mp->bytes_left <= 0) { 

            goto lost_sync;

        }

        mp->bytes_left -= mp->pc.index;

    }



    next = (mp->bytes_left > buf_size) ? END_NOT_FOUND : mp->bytes_left;



    if (ff_combine_frame(&mp->pc, next, &buf, &buf_size) < 0) {

        mp->bytes_left -= buf_size;

        return buf_size;

    }



    mp->bytes_left = 0;



    sync_present = (AV_RB32(buf + 4) & 0xfffffffe) == 0xf8726fba;



    if (!sync_present) {

        



        



        parity_bits = 0;

        for (i = -1; i < mp->num_substreams; i++) {

            parity_bits ^= buf[p++];

            parity_bits ^= buf[p++];



            if (i < 0 || buf[p-2] & 0x80) {

                parity_bits ^= buf[p++];

                parity_bits ^= buf[p++];

            }

        }



        if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) {

            av_log(avctx, AV_LOG_INFO, "mlpparse: Parity check failed.\n");

            goto lost_sync;

        }

    } else {

        GetBitContext gb;

        MLPHeaderInfo mh;



        init_get_bits(&gb, buf + 4, (buf_size - 4) << 3);

        if (ff_mlp_read_major_sync(avctx, &mh, &gb) < 0)

            goto lost_sync;



        avctx->bits_per_raw_sample = mh.group1_bits;

        if (avctx->bits_per_raw_sample > 16)

            avctx->sample_fmt = AV_SAMPLE_FMT_S32;

        else

            avctx->sample_fmt = AV_SAMPLE_FMT_S16;

        avctx->sample_rate = mh.group1_samplerate;

        s->duration = mh.access_unit_size;




        if (mh.stream_type == 0xbb) {

            

            avctx->channels = mlp_channels[mh.channels_mlp];

            avctx->channel_layout = ff_mlp_layout[mh.channels_mlp];

        } else { 

            

            if (mh.channels_thd_stream2) {

                avctx->channels = truehd_channels(mh.channels_thd_stream2);

                avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream2);

            } else {

                avctx->channels = truehd_channels(mh.channels_thd_stream1);

                avctx->channel_layout = ff_truehd_layout(mh.channels_thd_stream1);

            }

        }

        }



        if (!mh.is_vbr) 

            avctx->bit_rate = mh.peak_bitrate;



        mp->num_substreams = mh.num_substreams;

    }



    *poutbuf = buf;

    *poutbuf_size = buf_size;



    return next;



lost_sync:

    mp->in_sync = 0;

    return 1;

}
static int FUNC_0(AVCodecParserContext *VAR_0,

                     AVCodecContext *VAR_1,

                     const uint8_t **VAR_10, int *VAR_10,

                     const uint8_t *VAR_4, int VAR_5)

{

    MLPParseContext *mp = VAR_0->priv_data;

    int VAR_6;

    uint8_t parity_bits;

    int VAR_7;

    int VAR_8, VAR_9 = 0;



    *VAR_10 = 0;

    if (VAR_5 == 0)

        return 0;



    if (!mp->in_sync) {

        



        for (VAR_8 = 0; VAR_8 < VAR_5; VAR_8++) {

            mp->pc.state = (mp->pc.state << 8) | VAR_4[VAR_8];

            if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&

                

                mp->pc.index + VAR_8 >= 7) {

                mp->in_sync = 1;

                mp->bytes_left = 0;

                break;

            }

        }



        if (!mp->in_sync) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &VAR_4, &VAR_5);

            return VAR_5;

        }



        ff_combine_frame(&mp->pc, VAR_8 - 7, &VAR_4, &VAR_5);



        return VAR_8 - 7;

    }



    if (mp->bytes_left == 0) {

        



        

        for(; mp->pc.overread>0; mp->pc.overread--) {

            mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++];

        }



        if (mp->pc.index + VAR_5 < 2) {

            ff_combine_frame(&mp->pc, END_NOT_FOUND, &VAR_4, &VAR_5);

            return VAR_5;

        }



        mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : VAR_4[0]) << 8)

                       |  (mp->pc.index > 1 ? mp->pc.buffer[1] : VAR_4[1-mp->pc.index]);

        mp->bytes_left = (mp->bytes_left & 0xfff) * 2;

        if (mp->bytes_left <= 0) { 

            goto VAR_10;

        }

        mp->bytes_left -= mp->pc.index;

    }



    VAR_7 = (mp->bytes_left > VAR_5) ? END_NOT_FOUND : mp->bytes_left;



    if (ff_combine_frame(&mp->pc, VAR_7, &VAR_4, &VAR_5) < 0) {

        mp->bytes_left -= VAR_5;

        return VAR_5;

    }



    mp->bytes_left = 0;



    VAR_6 = (AV_RB32(VAR_4 + 4) & 0xfffffffe) == 0xf8726fba;



    if (!VAR_6) {

        



        



        parity_bits = 0;

        for (VAR_8 = -1; VAR_8 < mp->num_substreams; VAR_8++) {

            parity_bits ^= VAR_4[VAR_9++];

            parity_bits ^= VAR_4[VAR_9++];



            if (VAR_8 < 0 || VAR_4[VAR_9-2] & 0x80) {

                parity_bits ^= VAR_4[VAR_9++];

                parity_bits ^= VAR_4[VAR_9++];

            }

        }



        if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) {

            av_log(VAR_1, AV_LOG_INFO, "mlpparse: Parity check failed.\n");

            goto VAR_10;

        }

    } else {

        GetBitContext gb;

        MLPHeaderInfo mh;



        init_get_bits(&gb, VAR_4 + 4, (VAR_5 - 4) << 3);

        if (ff_mlp_read_major_sync(VAR_1, &mh, &gb) < 0)

            goto VAR_10;



        VAR_1->bits_per_raw_sample = mh.group1_bits;

        if (VAR_1->bits_per_raw_sample > 16)

            VAR_1->sample_fmt = AV_SAMPLE_FMT_S32;

        else

            VAR_1->sample_fmt = AV_SAMPLE_FMT_S16;

        VAR_1->sample_rate = mh.group1_samplerate;

        VAR_0->duration = mh.access_unit_size;




        if (mh.stream_type == 0xbb) {

            

            VAR_1->channels = mlp_channels[mh.channels_mlp];

            VAR_1->channel_layout = ff_mlp_layout[mh.channels_mlp];

        } else { 

            

            if (mh.channels_thd_stream2) {

                VAR_1->channels = truehd_channels(mh.channels_thd_stream2);

                VAR_1->channel_layout = ff_truehd_layout(mh.channels_thd_stream2);

            } else {

                VAR_1->channels = truehd_channels(mh.channels_thd_stream1);

                VAR_1->channel_layout = ff_truehd_layout(mh.channels_thd_stream1);

            }

        }

        }



        if (!mh.is_vbr) 

            VAR_1->bit_rate = mh.peak_bitrate;



        mp->num_substreams = mh.num_substreams;

    }



    *VAR_10 = VAR_4;

    *VAR_10 = VAR_5;



    return VAR_7;



VAR_10:

    mp->in_sync = 0;

    return 1;

}
static int FUNC_0(AVCodecParserContext *VAR_0,
AVCodecContext *VAR_1,
const uint8_t **VAR_10, int *VAR_10,
const uint8_t *VAR_4, int VAR_5)
{ MLPParseContext *mp = VAR_0->priv_data; int VAR_6; uint8_t parity_bits; int VAR_7; int VAR_8, VAR_9 = 0; *VAR_10 = 0; if (VAR_5 == 0)
return 0; if (!mp->in_sync) { for (VAR_8 = 0; VAR_8 < VAR_5; VAR_8++) { mp->pc.state = (mp->pc.state << 8) | VAR_4[VAR_8]; if ((mp->pc.state & 0xfffffffe) == 0xf8726fba &&
mp->pc.index + VAR_8 >= 7) { mp->in_sync = 1; mp->bytes_left = 0; break; } } if (!mp->in_sync) { ff_combine_frame(&mp->pc, END_NOT_FOUND, &VAR_4, &VAR_5); return VAR_5; } ff_combine_frame(&mp->pc, VAR_8 - 7, &VAR_4, &VAR_5); return VAR_8 - 7; } if (mp->bytes_left == 0) { for(; mp->pc.overread>0; mp->pc.overread--) { mp->pc.buffer[mp->pc.index++]= mp->pc.buffer[mp->pc.overread_index++]; } if (mp->pc.index + VAR_5 < 2) { ff_combine_frame(&mp->pc, END_NOT_FOUND, &VAR_4, &VAR_5); return VAR_5; } mp->bytes_left = ((mp->pc.index > 0 ? mp->pc.buffer[0] : VAR_4[0]) << 8)
|  (mp->pc.index > 1 ? mp->pc.buffer[1] : VAR_4[1-mp->pc.index]); mp->bytes_left = (mp->bytes_left & 0xfff) * 2; if (mp->bytes_left <= 0) { goto VAR_10; } mp->bytes_left -= mp->pc.index; } VAR_7 = (mp->bytes_left > VAR_5) ? END_NOT_FOUND : mp->bytes_left; if (ff_combine_frame(&mp->pc, VAR_7, &VAR_4, &VAR_5) < 0) { mp->bytes_left -= VAR_5; return VAR_5; } mp->bytes_left = 0; VAR_6 = (AV_RB32(VAR_4 + 4) & 0xfffffffe) == 0xf8726fba; if (!VAR_6) { parity_bits = 0; for (VAR_8 = -1; VAR_8 < mp->num_substreams; VAR_8++) { parity_bits ^= VAR_4[VAR_9++]; parity_bits ^= VAR_4[VAR_9++]; if (VAR_8 < 0 || VAR_4[VAR_9-2] & 0x80) { parity_bits ^= VAR_4[VAR_9++]; parity_bits ^= VAR_4[VAR_9++]; } } if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) { av_log(VAR_1, AV_LOG_INFO, "mlpparse: Parity check failed.\n"); goto VAR_10; } } else { GetBitContext gb; MLPHeaderInfo mh; init_get_bits(&gb, VAR_4 + 4, (VAR_5 - 4) << 3); if (ff_mlp_read_major_sync(VAR_1, &mh, &gb) < 0)
goto VAR_10; VAR_1->bits_per_raw_sample = mh.group1_bits; if (VAR_1->bits_per_raw_sample > 16)
VAR_1->sample_fmt = AV_SAMPLE_FMT_S32; else
VAR_1->sample_fmt = AV_SAMPLE_FMT_S16; VAR_1->sample_rate = mh.group1_samplerate; VAR_0->duration = mh.access_unit_size; if (mh.stream_type == 0xbb) { VAR_1->channels = mlp_channels[mh.channels_mlp]; VAR_1->channel_layout = ff_mlp_layout[mh.channels_mlp]; } else { if (mh.channels_thd_stream2) { VAR_1->channels = truehd_channels(mh.channels_thd_stream2); VAR_1->channel_layout = ff_truehd_layout(mh.channels_thd_stream2); } else { VAR_1->channels = truehd_channels(mh.channels_thd_stream1); VAR_1->channel_layout = ff_truehd_layout(mh.channels_thd_stream1); } } } if (!mh.is_vbr)
VAR_1->bit_rate = mh.peak_bitrate; mp->num_substreams = mh.num_substreams; } *VAR_10 = VAR_4; *VAR_10 = VAR_5; return VAR_7; VAR_10:
mp->in_sync = 0; return 1; }