コード例 #1
0
ファイル: alac.c プロジェクト: andryblack/ketlaer
static int alac_set_info(ALACContext *alac)
{
    const unsigned char *ptr = alac->avctx->extradata;

    ptr += 4; /* size */
    ptr += 4; /* alac */
    ptr += 4; /* 0 ? */

    if(AV_RB32(ptr) >= UINT_MAX/4){
        av_log(alac->avctx, AV_LOG_ERROR, "setinfo_max_samples_per_frame too large\n");
        return -1;
    }

    /* buffer size / 2 ? */
    alac->setinfo_max_samples_per_frame = bytestream_get_be32(&ptr);
    alac->setinfo_7a                    = *ptr++;
    alac->setinfo_sample_size           = *ptr++;
    alac->setinfo_rice_historymult      = *ptr++;
    alac->setinfo_rice_initialhistory   = *ptr++;
    alac->setinfo_rice_kmodifier        = *ptr++;
    /* channels? */
    alac->setinfo_7f                    = *ptr++;
    alac->setinfo_80                    = bytestream_get_be16(&ptr);
    /* max coded frame size */
    alac->setinfo_82                    = bytestream_get_be32(&ptr);
    /* bitrate ? */
    alac->setinfo_86                    = bytestream_get_be32(&ptr);
    /* samplerate */
    alac->setinfo_8a_rate               = bytestream_get_be32(&ptr);

    allocate_buffers(alac);

    return 0;
}
コード例 #2
0
ファイル: rtmppkt.c プロジェクト: LazyZhu/rt-n56u-1
static void ff_amf_tag_contents(void *ctx, const uint8_t *data, const uint8_t *data_end)
{
    unsigned int size;
    char buf[1024];

    if (data >= data_end)
        return;
    switch (*data++) {
    case AMF_DATA_TYPE_NUMBER:
        av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2dbl(AV_RB64(data)));
        return;
    case AMF_DATA_TYPE_BOOL:
        av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
        return;
    case AMF_DATA_TYPE_STRING:
    case AMF_DATA_TYPE_LONG_STRING:
        if (data[-1] == AMF_DATA_TYPE_STRING) {
            size = bytestream_get_be16(&data);
        } else {
            size = bytestream_get_be32(&data);
        }
        size = FFMIN(size, sizeof(buf) - 1);
        memcpy(buf, data, size);
        buf[size] = 0;
        av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
        return;
    case AMF_DATA_TYPE_NULL:
        av_log(ctx, AV_LOG_DEBUG, " NULL\n");
        return;
    case AMF_DATA_TYPE_ARRAY:
        data += 4;
    case AMF_DATA_TYPE_OBJECT:
        av_log(ctx, AV_LOG_DEBUG, " {\n");
        for (;;) {
            int t;
            size = bytestream_get_be16(&data);
            av_strlcpy(buf, data, FFMIN(sizeof(buf), size + 1));
            if (!size) {
                av_log(ctx, AV_LOG_DEBUG, " }\n");
                data++;
                break;
            }
            if (size >= data_end - data)
                return;
            data += size;
            av_log(ctx, AV_LOG_DEBUG, "  %s: ", buf);
            ff_amf_tag_contents(ctx, data, data_end);
            t = ff_amf_tag_size(data, data_end);
            if (t < 0 || t >= data_end - data)
                return;
            data += t;
        }
        return;
    case AMF_DATA_TYPE_OBJECT_END:
        av_log(ctx, AV_LOG_DEBUG, " }\n");
        return;
    default:
        return;
    }
}
コード例 #3
0
ファイル: sgidec.c プロジェクト: beequ7et/cinelerra-cv
/**
 * Read a run length encoded SGI image.
 * @param out_buf output buffer
 * @param in_buf input buffer
 * @param in_end end of input buffer
 * @param s the current image state
 * @return 0 if no error, else return error number.
 */
static int read_rle_sgi(unsigned char* out_buf, const uint8_t *in_buf,
                        const uint8_t *in_end, SgiState* s)
{
    uint8_t *dest_row;
    unsigned int len = s->height * s->depth * 4;
    const uint8_t *start_table = in_buf;
    unsigned int y, z;
    unsigned int start_offset;

    /* size of  RLE offset and length tables */
    if(len * 2  > in_end - in_buf) {
        return AVERROR_INVALIDDATA;
    }

    in_buf -= SGI_HEADER_SIZE;
    for (z = 0; z < s->depth; z++) {
        dest_row = out_buf;
        for (y = 0; y < s->height; y++) {
            dest_row -= s->linesize;
            start_offset = bytestream_get_be32(&start_table);
            if(start_offset > in_end - in_buf) {
                return AVERROR_INVALIDDATA;
            }
            if (expand_rle_row(in_buf + start_offset, in_end, dest_row + z,
                dest_row + FFABS(s->linesize), s->depth) != s->width)
                return AVERROR_INVALIDDATA;
        }
    }
    return 0;
}
コード例 #4
0
ファイル: rtmppkt.c プロジェクト: PtashnikGIT/rtmp_load
int ff_amf_match_string(const uint8_t *data, int size, const char *str)
{
    int len = strlen(str);
    int amf_len, type;

    if (size < 1)
        return 0;

    type = *data++;

    if (type != AMF_DATA_TYPE_LONG_STRING &&
        type != AMF_DATA_TYPE_STRING)
        return 0;

    if (type == AMF_DATA_TYPE_LONG_STRING) {
        if ((size -= 4 + 1) < 0)
            return 0;
        amf_len = bytestream_get_be32(&data);
    } else {
        if ((size -= 2 + 1) < 0)
            return 0;
        amf_len = bytestream_get_be16(&data);
    }

    if (amf_len > size)
        return 0;

    if (amf_len != len)
        return 0;

    return !memcmp(data, str, len);
}
コード例 #5
0
ファイル: rtmppkt.c プロジェクト: Acidburn0zzz/libav
int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
{
    const uint8_t *base = data;
    AMFDataType type;
    unsigned nb   = -1;
    int parse_key = 1;

    if (data >= data_end)
        return -1;
    switch ((type = *data++)) {
    case AMF_DATA_TYPE_NUMBER:      return 9;
    case AMF_DATA_TYPE_BOOL:        return 2;
    case AMF_DATA_TYPE_STRING:      return 3 + AV_RB16(data);
    case AMF_DATA_TYPE_LONG_STRING: return 5 + AV_RB32(data);
    case AMF_DATA_TYPE_NULL:        return 1;
    case AMF_DATA_TYPE_ARRAY:
        parse_key = 0;
    case AMF_DATA_TYPE_MIXEDARRAY:
        nb = bytestream_get_be32(&data);
    case AMF_DATA_TYPE_OBJECT:
        while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
            int t;
            if (parse_key) {
                int size = bytestream_get_be16(&data);
                if (!size) {
                    data++;
                    break;
                }
                if (size < 0 || size >= data_end - data)
                    return -1;
                data += size;
            }
            t = ff_amf_tag_size(data, data_end);
            if (t < 0 || t >= data_end - data)
                return -1;
            data += t;
        }
        return data - base;
    case AMF_DATA_TYPE_OBJECT_END:  return 1;
    default:                        return -1;
    }
}
コード例 #6
0
ファイル: cook.c プロジェクト: GenomeXP/mpc-hc
/**
 * Cook initialization
 *
 * @param avctx     pointer to the AVCodecContext
 */
static av_cold int cook_decode_init(AVCodecContext *avctx)
{
    COOKContext *q = avctx->priv_data;
    const uint8_t *edata_ptr = avctx->extradata;
    const uint8_t *edata_ptr_end = edata_ptr + avctx->extradata_size;
    int extradata_size = avctx->extradata_size;
    int s = 0;
    unsigned int channel_mask = 0;
    int samples_per_frame = 0;
    int ret;
    q->avctx = avctx;

    /* Take care of the codec specific extradata. */
    if (extradata_size <= 0) {
        av_log(avctx, AV_LOG_ERROR, "Necessary extradata missing!\n");
        return AVERROR_INVALIDDATA;
    }
    av_log(avctx, AV_LOG_DEBUG, "codecdata_length=%d\n", avctx->extradata_size);

    /* Take data from the AVCodecContext (RM container). */
    if (!avctx->channels) {
        av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
        return AVERROR_INVALIDDATA;
    }

    /* Initialize RNG. */
    av_lfg_init(&q->random_state, 0);

    ff_dsputil_init(&q->dsp, avctx);

    while (edata_ptr < edata_ptr_end) {
        /* 8 for mono, 16 for stereo, ? for multichannel
           Swap to right endianness so we don't need to care later on. */
        if (extradata_size >= 8) {
            q->subpacket[s].cookversion = bytestream_get_be32(&edata_ptr);
            samples_per_frame           = bytestream_get_be16(&edata_ptr);
            q->subpacket[s].subbands = bytestream_get_be16(&edata_ptr);
            extradata_size -= 8;
        }
        if (extradata_size >= 8) {
            bytestream_get_be32(&edata_ptr);    // Unknown unused
            q->subpacket[s].js_subband_start = bytestream_get_be16(&edata_ptr);
            q->subpacket[s].js_vlc_bits = bytestream_get_be16(&edata_ptr);
            extradata_size -= 8;
        }

        /* Initialize extradata related variables. */
        q->subpacket[s].samples_per_channel = samples_per_frame / avctx->channels;
        q->subpacket[s].bits_per_subpacket = avctx->block_align * 8;

        /* Initialize default data states. */
        q->subpacket[s].log2_numvector_size = 5;
        q->subpacket[s].total_subbands = q->subpacket[s].subbands;
        q->subpacket[s].num_channels = 1;

        /* Initialize version-dependent variables */

        av_log(avctx, AV_LOG_DEBUG, "subpacket[%i].cookversion=%x\n", s,
               q->subpacket[s].cookversion);
        q->subpacket[s].joint_stereo = 0;
        switch (q->subpacket[s].cookversion) {
        case MONO:
            if (avctx->channels != 1) {
                av_log_ask_for_sample(avctx, "Container channels != 1.\n");
                return AVERROR_PATCHWELCOME;
            }
            av_log(avctx, AV_LOG_DEBUG, "MONO\n");
            break;
        case STEREO:
            if (avctx->channels != 1) {
                q->subpacket[s].bits_per_subpdiv = 1;
                q->subpacket[s].num_channels = 2;
            }
            av_log(avctx, AV_LOG_DEBUG, "STEREO\n");
            break;
        case JOINT_STEREO:
            if (avctx->channels != 2) {
                av_log_ask_for_sample(avctx, "Container channels != 2.\n");
                return AVERROR_PATCHWELCOME;
            }
            av_log(avctx, AV_LOG_DEBUG, "JOINT_STEREO\n");
            if (avctx->extradata_size >= 16) {
                q->subpacket[s].total_subbands = q->subpacket[s].subbands +
                                                 q->subpacket[s].js_subband_start;
                q->subpacket[s].joint_stereo = 1;
                q->subpacket[s].num_channels = 2;
            }
            if (q->subpacket[s].samples_per_channel > 256) {
                q->subpacket[s].log2_numvector_size = 6;
            }
            if (q->subpacket[s].samples_per_channel > 512) {
                q->subpacket[s].log2_numvector_size = 7;
            }
            break;
        case MC_COOK:
            av_log(avctx, AV_LOG_DEBUG, "MULTI_CHANNEL\n");
            if (extradata_size >= 4)
                channel_mask |= q->subpacket[s].channel_mask = bytestream_get_be32(&edata_ptr);

            if (av_get_channel_layout_nb_channels(q->subpacket[s].channel_mask) > 1) {
                q->subpacket[s].total_subbands = q->subpacket[s].subbands +
                                                 q->subpacket[s].js_subband_start;
                q->subpacket[s].joint_stereo = 1;
                q->subpacket[s].num_channels = 2;
                q->subpacket[s].samples_per_channel = samples_per_frame >> 1;

                if (q->subpacket[s].samples_per_channel > 256) {
                    q->subpacket[s].log2_numvector_size = 6;
                }
                if (q->subpacket[s].samples_per_channel > 512) {
                    q->subpacket[s].log2_numvector_size = 7;
                }
            } else
                q->subpacket[s].samples_per_channel = samples_per_frame;

            break;
        default:
            av_log_ask_for_sample(avctx, "Unknown Cook version.\n");
            return AVERROR_PATCHWELCOME;
        }
コード例 #7
0
ファイル: cook.c プロジェクト: Yelinson/OpenVideoHub
static int cook_decode_init(AVCodecContext *avctx)
{
    COOKContext *q = avctx->priv_data;
    const uint8_t *edata_ptr = avctx->extradata;

    /* Take care of the codec specific extradata. */
    if (avctx->extradata_size <= 0) {
        av_log(avctx,AV_LOG_ERROR,"Necessary extradata missing!\n");
        return -1;
    } else {
        /* 8 for mono, 16 for stereo, ? for multichannel
           Swap to right endianness so we don't need to care later on. */
        av_log(avctx,AV_LOG_DEBUG,"codecdata_length=%d\n",avctx->extradata_size);
        if (avctx->extradata_size >= 8){
            q->cookversion = bytestream_get_be32(&edata_ptr);
            q->samples_per_frame =  bytestream_get_be16(&edata_ptr);
            q->subbands = bytestream_get_be16(&edata_ptr);
        }
        if (avctx->extradata_size >= 16){
            bytestream_get_be32(&edata_ptr);    //Unknown unused
            q->js_subband_start = bytestream_get_be16(&edata_ptr);
            q->js_vlc_bits = bytestream_get_be16(&edata_ptr);
        }
    }

    /* Take data from the AVCodecContext (RM container). */
    q->sample_rate = avctx->sample_rate;
    q->nb_channels = avctx->channels;
    q->bit_rate = avctx->bit_rate;

    /* Initialize RNG. */
    av_init_random(1, &q->random_state);

    /* Initialize extradata related variables. */
    q->samples_per_channel = q->samples_per_frame / q->nb_channels;
    q->bits_per_subpacket = avctx->block_align * 8;

    /* Initialize default data states. */
    q->log2_numvector_size = 5;
    q->total_subbands = q->subbands;

    /* Initialize version-dependent variables */
    av_log(NULL,AV_LOG_DEBUG,"q->cookversion=%x\n",q->cookversion);
    q->joint_stereo = 0;
    switch (q->cookversion) {
        case MONO:
            if (q->nb_channels != 1) {
                av_log(avctx,AV_LOG_ERROR,"Container channels != 1, report sample!\n");
                return -1;
            }
            av_log(avctx,AV_LOG_DEBUG,"MONO\n");
            break;
        case STEREO:
            if (q->nb_channels != 1) {
                q->bits_per_subpacket = q->bits_per_subpacket/2;
            }
            av_log(avctx,AV_LOG_DEBUG,"STEREO\n");
            break;
        case JOINT_STEREO:
            if (q->nb_channels != 2) {
                av_log(avctx,AV_LOG_ERROR,"Container channels != 2, report sample!\n");
                return -1;
            }
            av_log(avctx,AV_LOG_DEBUG,"JOINT_STEREO\n");
            if (avctx->extradata_size >= 16){
                q->total_subbands = q->subbands + q->js_subband_start;
                q->joint_stereo = 1;
            }
            if (q->samples_per_channel > 256) {
                q->log2_numvector_size  = 6;
            }
            if (q->samples_per_channel > 512) {
                q->log2_numvector_size  = 7;
            }
            break;
        case MC_COOK:
            av_log(avctx,AV_LOG_ERROR,"MC_COOK not supported!\n");
            return -1;
            break;
        default:
            av_log(avctx,AV_LOG_ERROR,"Unknown Cook version, report sample!\n");
            return -1;
            break;
    }

    /* Initialize variable relations */
    q->numvector_size = (1 << q->log2_numvector_size);

    /* Generate tables */
    init_pow2table();
    init_gain_table(q);
    init_cplscales_table(q);

    if (init_cook_vlc_tables(q) != 0)
        return -1;


    if(avctx->block_align >= UINT_MAX/2)
        return -1;

    /* Pad the databuffer with:
       DECODE_BYTES_PAD1 or DECODE_BYTES_PAD2 for decode_bytes(),
       FF_INPUT_BUFFER_PADDING_SIZE, for the bitstreamreader. */
    if (q->nb_channels==2 && q->joint_stereo==0) {
        q->decoded_bytes_buffer =
          av_mallocz(avctx->block_align/2
                     + DECODE_BYTES_PAD2(avctx->block_align/2)
                     + FF_INPUT_BUFFER_PADDING_SIZE);
    } else {
        q->decoded_bytes_buffer =
          av_mallocz(avctx->block_align
                     + DECODE_BYTES_PAD1(avctx->block_align)
                     + FF_INPUT_BUFFER_PADDING_SIZE);
    }
    if (q->decoded_bytes_buffer == NULL)
        return -1;

    q->gains1.now      = q->gain_1;
    q->gains1.previous = q->gain_2;
    q->gains2.now      = q->gain_3;
    q->gains2.previous = q->gain_4;

    /* Initialize transform. */
    if ( init_cook_mlt(q) != 0 )
        return -1;

    /* Initialize COOK signal arithmetic handling */
    if (1) {
        q->scalar_dequant  = scalar_dequant_float;
        q->decouple        = decouple_float;
        q->imlt_window     = imlt_window_float;
        q->interpolate     = interpolate_float;
        q->saturate_output = saturate_output_float;
    }

    /* Try to catch some obviously faulty streams, othervise it might be exploitable */
    if (q->total_subbands > 53) {
        av_log(avctx,AV_LOG_ERROR,"total_subbands > 53, report sample!\n");
        return -1;
    }
    if (q->subbands > 50) {
        av_log(avctx,AV_LOG_ERROR,"subbands > 50, report sample!\n");
        return -1;
    }
    if ((q->samples_per_channel == 256) || (q->samples_per_channel == 512) || (q->samples_per_channel == 1024)) {
    } else {
        av_log(avctx,AV_LOG_ERROR,"unknown amount of samples_per_channel = %d, report sample!\n",q->samples_per_channel);
        return -1;
    }
    if ((q->js_vlc_bits > 6) || (q->js_vlc_bits < 0)) {
        av_log(avctx,AV_LOG_ERROR,"q->js_vlc_bits = %d, only >= 0 and <= 6 allowed!\n",q->js_vlc_bits);
        return -1;
    }

    avctx->sample_fmt = SAMPLE_FMT_S16;

#ifdef COOKDEBUG
    dump_cook_context(q);
#endif
    return 0;
}
コード例 #8
0
ファイル: rtmppkt.c プロジェクト: Acidburn0zzz/libav
static void amf_tag_contents(void *ctx, const uint8_t *data,
                             const uint8_t *data_end)
{
    unsigned int size, nb = -1;
    char buf[1024];
    AMFDataType type;
    int parse_key = 1;

    if (data >= data_end)
        return;
    switch ((type = *data++)) {
    case AMF_DATA_TYPE_NUMBER:
        av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
        return;
    case AMF_DATA_TYPE_BOOL:
        av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
        return;
    case AMF_DATA_TYPE_STRING:
    case AMF_DATA_TYPE_LONG_STRING:
        if (type == AMF_DATA_TYPE_STRING) {
            size = bytestream_get_be16(&data);
        } else {
            size = bytestream_get_be32(&data);
        }
        size = FFMIN(size, sizeof(buf) - 1);
        memcpy(buf, data, size);
        buf[size] = 0;
        av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
        return;
    case AMF_DATA_TYPE_NULL:
        av_log(ctx, AV_LOG_DEBUG, " NULL\n");
        return;
    case AMF_DATA_TYPE_ARRAY:
        parse_key = 0;
    case AMF_DATA_TYPE_MIXEDARRAY:
        nb = bytestream_get_be32(&data);
    case AMF_DATA_TYPE_OBJECT:
        av_log(ctx, AV_LOG_DEBUG, " {\n");
        while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
            int t;
            if (parse_key) {
                size = bytestream_get_be16(&data);
                size = FFMIN(size, sizeof(buf) - 1);
                if (!size) {
                    av_log(ctx, AV_LOG_DEBUG, " }\n");
                    data++;
                    break;
                }
                memcpy(buf, data, size);
                buf[size] = 0;
                if (size >= data_end - data)
                    return;
                data += size;
                av_log(ctx, AV_LOG_DEBUG, "  %s: ", buf);
            }
            amf_tag_contents(ctx, data, data_end);
            t = ff_amf_tag_size(data, data_end);
            if (t < 0 || t >= data_end - data)
                return;
            data += t;
        }
        return;
    case AMF_DATA_TYPE_OBJECT_END:
        av_log(ctx, AV_LOG_DEBUG, " }\n");
        return;
    default:
        return;
    }
}