Exemplos de av_buffer_realloc em C++ (Cpp)

Exemplo n.º 1

Arquivo: avpacket.c Projeto: caomw/libav

int av_grow_packet(AVPacket *pkt, int grow_by)
{
    int new_size;
    av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
    if (!pkt->size)
        return av_new_packet(pkt, grow_by);
    if ((unsigned)grow_by >
        INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
        return -1;

    new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
    if (pkt->buf) {
        int ret = av_buffer_realloc(&pkt->buf, new_size);
        if (ret < 0)
            return ret;
    } else {
        pkt->buf = av_buffer_alloc(new_size);
        if (!pkt->buf)
            return AVERROR(ENOMEM);
        memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
    }
    pkt->data  = pkt->buf->data;
    pkt->size += grow_by;
    memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);

    return 0;
}

Exemplo n.º 2

Arquivo: avpacket.c Projeto: EricnJennifer/ffmpeg-android

int av_grow_packet(AVPacket *pkt, int grow_by)
{
    int new_size;
    av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE);
    if (!pkt->size)
        return av_new_packet(pkt, grow_by);
    if ((unsigned)grow_by >
        INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
        return -1;

    new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE;
    if (pkt->buf) {
        int ret = av_buffer_realloc(&pkt->buf, new_size);
        if (ret < 0)
            return ret;
    } else {
        pkt->buf = av_buffer_alloc(new_size);
        if (!pkt->buf)
            return AVERROR(ENOMEM);
        memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
#if FF_API_DESTRUCT_PACKET
        pkt->destruct = dummy_destruct_packet;
#endif
    }
    pkt->data  = pkt->buf->data;
    pkt->size += grow_by;
    memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

    return 0;
}

Exemplo n.º 3

Arquivo: avpacket.c Projeto: Johnsonwu/FFmpeg

static int packet_alloc(AVBufferRef **buf, int size)
{
    if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
        return AVERROR(EINVAL);

    av_buffer_realloc(buf, size + FF_INPUT_BUFFER_PADDING_SIZE);
    if (!*buf)
        return AVERROR(ENOMEM);

    memset((*buf)->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

    return 0;
}

Exemplo n.º 4

Arquivo: avpacket.c Projeto: Bilibili/FFmpeg

static int packet_alloc(AVBufferRef **buf, int size)
{
    int ret;
    if (size < 0 || size >= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
        return AVERROR(EINVAL);

    ret = av_buffer_realloc(buf, size + AV_INPUT_BUFFER_PADDING_SIZE);
    if (ret < 0)
        return ret;

    memset((*buf)->data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);

    return 0;
}

Exemplo n.º 5

Arquivo: avpacket.c Projeto: Bilibili/FFmpeg

int av_grow_packet(AVPacket *pkt, int grow_by)
{
    int new_size;
    av_assert0((unsigned)pkt->size <= INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
    if ((unsigned)grow_by >
        INT_MAX - (pkt->size + AV_INPUT_BUFFER_PADDING_SIZE))
        return -1;

    new_size = pkt->size + grow_by + AV_INPUT_BUFFER_PADDING_SIZE;
    if (pkt->buf) {
        size_t data_offset;
        uint8_t *old_data = pkt->data;
        if (pkt->data == NULL) {
            data_offset = 0;
            pkt->data = pkt->buf->data;
        } else {
            data_offset = pkt->data - pkt->buf->data;
            if (data_offset > INT_MAX - new_size)
                return -1;
        }

        if (new_size + data_offset > pkt->buf->size) {
            int ret = av_buffer_realloc(&pkt->buf, new_size + data_offset);
            if (ret < 0) {
                pkt->data = old_data;
                return ret;
            }
            pkt->data = pkt->buf->data + data_offset;
        }
    } else {
        pkt->buf = av_buffer_alloc(new_size);
        if (!pkt->buf)
            return AVERROR(ENOMEM);
        if (pkt->size > 0)
            memcpy(pkt->buf->data, pkt->data, pkt->size);
        pkt->data = pkt->buf->data;
    }
    pkt->size += grow_by;
    memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);

    return 0;
}

Exemplo n.º 6

Arquivo: Packet.cpp Projeto: Brijen/LAVFilters

int Packet::SetDataSize(int len)
{
  if (len < 0)
    return -1;

  // RemoveHead may have moved m_Data, make sure the data moved too.
  if (m_Buf && m_Buf->data != m_Data)
    memmove(m_Buf->data, m_Data, m_DataSize);

  // Re-allocate the buffer, if required
  if (!m_Buf || m_Buf->size < (len + FF_INPUT_BUFFER_PADDING_SIZE)) {
    int ret = av_buffer_realloc(&m_Buf, len + FF_INPUT_BUFFER_PADDING_SIZE);
    if (ret < 0)
      return ret;
  }
  m_Data = m_Buf->data;
  m_DataSize = len;

  return 0;
}

Exemplo n.º 7

Arquivo: avpacket.c Projeto: EricnJennifer/ffmpeg-android

int av_new_packet(AVPacket *pkt, int size)
{
    AVBufferRef *buf = NULL;

    if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
        return AVERROR(EINVAL);

    av_buffer_realloc(&buf, size + FF_INPUT_BUFFER_PADDING_SIZE);
    if (!buf)
        return AVERROR(ENOMEM);

    memset(buf->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

    av_init_packet(pkt);
    pkt->buf      = buf;
    pkt->data     = buf->data;
    pkt->size     = size;
#if FF_API_DESTRUCT_PACKET
    pkt->destruct = dummy_destruct_packet;
#endif

    return 0;
}