static int wc3_read_header(AVFormatContext *s,

                           AVFormatParameters *ap)

{

    Wc3DemuxContext *wc3 = s->priv_data;

    ByteIOContext *pb = s->pb;

    unsigned int fourcc_tag;

    unsigned int size;

    AVStream *st;

    int ret = 0;

    int current_palette = 0;

    char *buffer;

    int i;



    /* default context members */

    wc3->width = WC3_DEFAULT_WIDTH;

    wc3->height = WC3_DEFAULT_HEIGHT;

    wc3->palettes = NULL;

    wc3->palette_count = 0;

    wc3->pts = 0;

    wc3->video_stream_index = wc3->audio_stream_index = 0;



    /* skip the first 3 32-bit numbers */

    url_fseek(pb, 12, SEEK_CUR);



    /* traverse through the chunks and load the header information before

     * the first BRCH tag */

    fourcc_tag = get_le32(pb);

    size = (get_be32(pb) + 1) & (~1);



    do {

        switch (fourcc_tag) {



        case SOND_TAG:

        case INDX_TAG:

            /* SOND unknown, INDX unnecessary; ignore both */

            url_fseek(pb, size, SEEK_CUR);

            break;



        case PC__TAG:

            /* need the number of palettes */

            url_fseek(pb, 8, SEEK_CUR);

            wc3->palette_count = get_le32(pb);

            if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){

                wc3->palette_count= 0;

                return -1;

            }

            wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);

            break;



        case BNAM_TAG:

            /* load up the name */

            buffer = av_malloc(size+1);

            if (!buffer)

                return AVERROR(ENOMEM);

            if ((ret = get_buffer(pb, buffer, size)) != size)

                return AVERROR(EIO);

            buffer[size] = 0;

            av_metadata_set2(&s->metadata, "title", buffer,

                                   AV_METADATA_DONT_STRDUP_VAL);

            break;



        case SIZE_TAG:

            /* video resolution override */

            wc3->width  = get_le32(pb);

            wc3->height = get_le32(pb);

            break;



        case PALT_TAG:

            /* one of several palettes */

            if ((unsigned)current_palette >= wc3->palette_count)

                return AVERROR_INVALIDDATA;

            if ((ret = get_buffer(pb,

                &wc3->palettes[current_palette * PALETTE_SIZE],

                PALETTE_SIZE)) != PALETTE_SIZE)

                return AVERROR(EIO);



            /* transform the current palette in place */

            for (i = current_palette * PALETTE_SIZE;

                 i < (current_palette + 1) * PALETTE_SIZE; i++) {

                wc3->palettes[i] = wc3_pal_lookup[wc3->palettes[i]];

            }

            current_palette++;

            break;



        default:

            av_log(s, AV_LOG_ERROR, "  unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",

                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24),

                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24));

            return AVERROR_INVALIDDATA;

            break;

        }



        fourcc_tag = get_le32(pb);

        /* chunk sizes are 16-bit aligned */

        size = (get_be32(pb) + 1) & (~1);

        if (url_feof(pb))

            return AVERROR(EIO);



    } while (fourcc_tag != BRCH_TAG);



    /* initialize the decoder streams */

    st = av_new_stream(s, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->video_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

    st->codec->codec_id = CODEC_ID_XAN_WC3;

    st->codec->codec_tag = 0;  /* no fourcc */

    st->codec->width = wc3->width;

    st->codec->height = wc3->height;



    /* palette considerations */

    st->codec->palctrl = &wc3->palette_control;



    st = av_new_stream(s, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->audio_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

    st->codec->codec_id = CODEC_ID_PCM_S16LE;

    st->codec->codec_tag = 1;

    st->codec->channels = WC3_AUDIO_CHANNELS;

    st->codec->bits_per_coded_sample = WC3_AUDIO_BITS;

    st->codec->sample_rate = WC3_SAMPLE_RATE;

    st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *

        st->codec->bits_per_coded_sample;

    st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS;



    return 0;

}

static int wc3_read_header(AVFormatContext *s,

                           AVFormatParameters *ap)

{

    Wc3DemuxContext *wc3 = s->priv_data;

    ByteIOContext *pb = s->pb;

    unsigned int fourcc_tag;

    unsigned int size;

    AVStream *st;

    int ret = 0;

    int current_palette = 0;

    char *buffer;

    int i;



    

    wc3->width = WC3_DEFAULT_WIDTH;

    wc3->height = WC3_DEFAULT_HEIGHT;

    wc3->palettes = NULL;

    wc3->palette_count = 0;

    wc3->pts = 0;

    wc3->video_stream_index = wc3->audio_stream_index = 0;



    

    url_fseek(pb, 12, SEEK_CUR);



    



    fourcc_tag = get_le32(pb);

    size = (get_be32(pb) + 1) & (~1);



    do {

        switch (fourcc_tag) {



        case SOND_TAG:

        case INDX_TAG:

            

            url_fseek(pb, size, SEEK_CUR);

            break;



        case PC__TAG:

            

            url_fseek(pb, 8, SEEK_CUR);

            wc3->palette_count = get_le32(pb);

            if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){

                wc3->palette_count= 0;

                return -1;

            }

            wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);

            break;



        case BNAM_TAG:

            

            buffer = av_malloc(size+1);

            if (!buffer)

                return AVERROR(ENOMEM);

            if ((ret = get_buffer(pb, buffer, size)) != size)

                return AVERROR(EIO);

            buffer[size] = 0;

            av_metadata_set2(&s->metadata, "title", buffer,

                                   AV_METADATA_DONT_STRDUP_VAL);

            break;



        case SIZE_TAG:

            

            wc3->width  = get_le32(pb);

            wc3->height = get_le32(pb);

            break;



        case PALT_TAG:

            

            if ((unsigned)current_palette >= wc3->palette_count)

                return AVERROR_INVALIDDATA;

            if ((ret = get_buffer(pb,

                &wc3->palettes[current_palette * PALETTE_SIZE],

                PALETTE_SIZE)) != PALETTE_SIZE)

                return AVERROR(EIO);



            

            for (i = current_palette * PALETTE_SIZE;

                 i < (current_palette + 1) * PALETTE_SIZE; i++) {

                wc3->palettes[i] = wc3_pal_lookup[wc3->palettes[i]];

            }

            current_palette++;

            break;



        default:

            av_log(s, AV_LOG_ERROR, "  unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",

                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24),

                (uint8_t)fourcc_tag, (uint8_t)(fourcc_tag >> 8), (uint8_t)(fourcc_tag >> 16), (uint8_t)(fourcc_tag >> 24));

            return AVERROR_INVALIDDATA;

            break;

        }



        fourcc_tag = get_le32(pb);

        

        size = (get_be32(pb) + 1) & (~1);

        if (url_feof(pb))

            return AVERROR(EIO);



    } while (fourcc_tag != BRCH_TAG);



    

    st = av_new_stream(s, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->video_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

    st->codec->codec_id = CODEC_ID_XAN_WC3;

    st->codec->codec_tag = 0;  

    st->codec->width = wc3->width;

    st->codec->height = wc3->height;



    

    st->codec->palctrl = &wc3->palette_control;



    st = av_new_stream(s, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->audio_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

    st->codec->codec_id = CODEC_ID_PCM_S16LE;

    st->codec->codec_tag = 1;

    st->codec->channels = WC3_AUDIO_CHANNELS;

    st->codec->bits_per_coded_sample = WC3_AUDIO_BITS;

    st->codec->sample_rate = WC3_SAMPLE_RATE;

    st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *

        st->codec->bits_per_coded_sample;

    st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS;



    return 0;

}

    int current_palette = 0;     int i;     wc3->palettes = NULL;     wc3->palette_count = 0;             url_fseek(pb, 8, SEEK_CUR);             wc3->palette_count = get_le32(pb);             if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){                 wc3->palette_count= 0;                 return -1;             wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);             if ((unsigned)current_palette >= wc3->palette_count)                 return AVERROR_INVALIDDATA;             if ((ret = get_buffer(pb,                 &wc3->palettes[current_palette * PALETTE_SIZE],                 PALETTE_SIZE)) != PALETTE_SIZE)                 return AVERROR(EIO);             for (i = current_palette * PALETTE_SIZE;                  i < (current_palette + 1) * PALETTE_SIZE; i++) {                 wc3->palettes[i] = wc3_pal_lookup[wc3->palettes[i]];             current_palette++;     st->codec->palctrl = &wc3->palette_control;     int i;                 return AVERROR_INVALIDDATA;
static int FUNC_0(AVFormatContext *VAR_0,

                           AVFormatParameters *VAR_1)

{

    Wc3DemuxContext *wc3 = VAR_0->priv_data;

    ByteIOContext *pb = VAR_0->pb;

    unsigned int VAR_2;

    unsigned int VAR_3;

    AVStream *st;

    int VAR_4 = 0;

    int VAR_5 = 0;

    char *VAR_6;

    int VAR_7;



    

    wc3->width = WC3_DEFAULT_WIDTH;

    wc3->height = WC3_DEFAULT_HEIGHT;

    wc3->palettes = NULL;

    wc3->palette_count = 0;

    wc3->pts = 0;

    wc3->video_stream_index = wc3->audio_stream_index = 0;



    

    url_fseek(pb, 12, SEEK_CUR);



    



    VAR_2 = get_le32(pb);

    VAR_3 = (get_be32(pb) + 1) & (~1);



    do {

        switch (VAR_2) {



        case SOND_TAG:

        case INDX_TAG:

            

            url_fseek(pb, VAR_3, SEEK_CUR);

            break;



        case PC__TAG:

            

            url_fseek(pb, 8, SEEK_CUR);

            wc3->palette_count = get_le32(pb);

            if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){

                wc3->palette_count= 0;

                return -1;

            }

            wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);

            break;



        case BNAM_TAG:

            

            VAR_6 = av_malloc(VAR_3+1);

            if (!VAR_6)

                return AVERROR(ENOMEM);

            if ((VAR_4 = get_buffer(pb, VAR_6, VAR_3)) != VAR_3)

                return AVERROR(EIO);

            VAR_6[VAR_3] = 0;

            av_metadata_set2(&VAR_0->metadata, "title", VAR_6,

                                   AV_METADATA_DONT_STRDUP_VAL);

            break;



        case SIZE_TAG:

            

            wc3->width  = get_le32(pb);

            wc3->height = get_le32(pb);

            break;



        case PALT_TAG:

            

            if ((unsigned)VAR_5 >= wc3->palette_count)

                return AVERROR_INVALIDDATA;

            if ((VAR_4 = get_buffer(pb,

                &wc3->palettes[VAR_5 * PALETTE_SIZE],

                PALETTE_SIZE)) != PALETTE_SIZE)

                return AVERROR(EIO);



            

            for (VAR_7 = VAR_5 * PALETTE_SIZE;

                 VAR_7 < (VAR_5 + 1) * PALETTE_SIZE; VAR_7++) {

                wc3->palettes[VAR_7] = wc3_pal_lookup[wc3->palettes[VAR_7]];

            }

            VAR_5++;

            break;



        default:

            av_log(VAR_0, AV_LOG_ERROR, "  unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",

                (uint8_t)VAR_2, (uint8_t)(VAR_2 >> 8), (uint8_t)(VAR_2 >> 16), (uint8_t)(VAR_2 >> 24),

                (uint8_t)VAR_2, (uint8_t)(VAR_2 >> 8), (uint8_t)(VAR_2 >> 16), (uint8_t)(VAR_2 >> 24));

            return AVERROR_INVALIDDATA;

            break;

        }



        VAR_2 = get_le32(pb);

        

        VAR_3 = (get_be32(pb) + 1) & (~1);

        if (url_feof(pb))

            return AVERROR(EIO);



    } while (VAR_2 != BRCH_TAG);



    

    st = av_new_stream(VAR_0, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->video_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

    st->codec->codec_id = CODEC_ID_XAN_WC3;

    st->codec->codec_tag = 0;  

    st->codec->width = wc3->width;

    st->codec->height = wc3->height;



    

    st->codec->palctrl = &wc3->palette_control;



    st = av_new_stream(VAR_0, 0);

    if (!st)

        return AVERROR(ENOMEM);

    av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);

    wc3->audio_stream_index = st->index;

    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;

    st->codec->codec_id = CODEC_ID_PCM_S16LE;

    st->codec->codec_tag = 1;

    st->codec->channels = WC3_AUDIO_CHANNELS;

    st->codec->bits_per_coded_sample = WC3_AUDIO_BITS;

    st->codec->sample_rate = WC3_SAMPLE_RATE;

    st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *

        st->codec->bits_per_coded_sample;

    st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS;



    return 0;

}

static int FUNC_0(AVFormatContext *VAR_0,
AVFormatParameters *VAR_1)
{ Wc3DemuxContext *wc3 = VAR_0->priv_data; ByteIOContext *pb = VAR_0->pb; unsigned int VAR_2; unsigned int VAR_3; AVStream *st; int VAR_4 = 0; int VAR_5 = 0; char *VAR_6; int VAR_7; wc3->width = WC3_DEFAULT_WIDTH; wc3->height = WC3_DEFAULT_HEIGHT; wc3->palettes = NULL; wc3->palette_count = 0; wc3->pts = 0; wc3->video_stream_index = wc3->audio_stream_index = 0; url_fseek(pb, 12, SEEK_CUR); VAR_2 = get_le32(pb); VAR_3 = (get_be32(pb) + 1) & (~1); do { switch (VAR_2) { case SOND_TAG:
case INDX_TAG:
url_fseek(pb, VAR_3, SEEK_CUR); break; case PC__TAG:
url_fseek(pb, 8, SEEK_CUR); wc3->palette_count = get_le32(pb); if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){ wc3->palette_count= 0; return -1; } wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE); break; case BNAM_TAG:
VAR_6 = av_malloc(VAR_3+1); if (!VAR_6)
return AVERROR(ENOMEM); if ((VAR_4 = get_buffer(pb, VAR_6, VAR_3)) != VAR_3)
return AVERROR(EIO); VAR_6[VAR_3] = 0; av_metadata_set2(&VAR_0->metadata, "title", VAR_6,
AV_METADATA_DONT_STRDUP_VAL); break; case SIZE_TAG:
wc3->width  = get_le32(pb); wc3->height = get_le32(pb); break; case PALT_TAG:
if ((unsigned)VAR_5 >= wc3->palette_count)
return AVERROR_INVALIDDATA; if ((VAR_4 = get_buffer(pb,
&wc3->palettes[VAR_5 * PALETTE_SIZE],
PALETTE_SIZE)) != PALETTE_SIZE)
return AVERROR(EIO); for (VAR_7 = VAR_5 * PALETTE_SIZE; VAR_7 < (VAR_5 + 1) * PALETTE_SIZE; VAR_7++) { wc3->palettes[VAR_7] = wc3_pal_lookup[wc3->palettes[VAR_7]]; } VAR_5++; break; default:
av_log(VAR_0, AV_LOG_ERROR, "  unrecognized WC3 chunk: %c%c%c%c (0x%02X%02X%02X%02X)\n",
(uint8_t)VAR_2, (uint8_t)(VAR_2 >> 8), (uint8_t)(VAR_2 >> 16), (uint8_t)(VAR_2 >> 24),
(uint8_t)VAR_2, (uint8_t)(VAR_2 >> 8), (uint8_t)(VAR_2 >> 16), (uint8_t)(VAR_2 >> 24)); return AVERROR_INVALIDDATA; break; } VAR_2 = get_le32(pb); VAR_3 = (get_be32(pb) + 1) & (~1); if (url_feof(pb))
return AVERROR(EIO); } while (VAR_2 != BRCH_TAG); st = av_new_stream(VAR_0, 0); if (!st)
return AVERROR(ENOMEM); av_set_pts_info(st, 33, 1, WC3_FRAME_FPS); wc3->video_stream_index = st->index; st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = CODEC_ID_XAN_WC3; st->codec->codec_tag = 0; st->codec->width = wc3->width; st->codec->height = wc3->height; st->codec->palctrl = &wc3->palette_control; st = av_new_stream(VAR_0, 0); if (!st)
return AVERROR(ENOMEM); av_set_pts_info(st, 33, 1, WC3_FRAME_FPS); wc3->audio_stream_index = st->index; st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = CODEC_ID_PCM_S16LE; st->codec->codec_tag = 1; st->codec->channels = WC3_AUDIO_CHANNELS; st->codec->bits_per_coded_sample = WC3_AUDIO_BITS; st->codec->sample_rate = WC3_SAMPLE_RATE; st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_coded_sample; st->codec->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS; return 0; }