C++ GST_BUFFER_SIZE函数代码示例

/**
 * Main working loop for stuff coming in from the CCNx network
 *
 * The only kind of content we work with are data messages. They are in response to the
 * interest messages we send out. The work involves 2 pieces: packing the data from ccn message
 * sizes into buffer sizes we use internally, and detecting when the stream of data is done.
 * 
 * The first is fairly simple. Each internal buffer we 'fill' is placed onto the fifo queue
 * so the main thread can take it off and reply to the pipeline request for more data.
 *
 * Determining the end of stream at the moment is a bit of a hack and could use some work.
 * \todo volunteers?  8-)
 *
 * \param	selfp		-> a context structure we created when registering this call-back
 * \param	kind		specifies the type of call-back being processed, see the \b switch statement
 * \param	info		context information about the call-back itself; interests, data, etc.
 * \return a response as to how successful we were in processing the call-back
 * \retval CCN_UPCALL_RESULT_OK		things went well
 * \retval CCN_UPCALL_RESULT_VERIFY	need to verify the contents of what we received
 * \retval CCN_UPCALL_RESULT_REEXPRESS an interest timedout waiting for data, so we try again
 * \retval CCN_UPCALL_RESULT_ERR	some error was encountered
 */
static enum ccn_upcall_res
incoming_content (struct ccn_closure *selfp,
    enum ccn_upcall_kind kind, struct ccn_upcall_info *info)
{
  Gstccnxsrc *me = GST_CCNXSRC (selfp->data);

  const unsigned char *ccnb = NULL;
  size_t ccnb_size = 0;
  const unsigned char *ib = NULL;       /* info->interest_ccnb */
  struct ccn_indexbuf *ic = NULL;
  unsigned int i;
  uintmax_t segment;
  CcnxInterestState *istate = NULL;
  gint res;
  const unsigned char *cp;
  size_t sz;
  const unsigned char *data = NULL;
  size_t data_size = 0;
  gboolean b_last = FALSE;

  GST_INFO ("content has arrived!");

  /* Do some basic sanity and type checks to see if we want to process this data */

  if (CCN_UPCALL_FINAL == kind) {
    GST_LOG_OBJECT (me, "CCN upcall final %p", selfp);
    if (me->i_bufoffset > 0) {
      GST_BUFFER_SIZE (me->buf) = me->i_bufoffset;
      fifo_put (me, me->buf);
      me->buf = gst_buffer_new_and_alloc (CCN_FIFO_BLOCK_SIZE);
      me->i_bufoffset = 0;
    }
/*
 * Should emit an eos here instead of the empty buffer
 */
    GST_BUFFER_SIZE (me->buf) = 0;
    fifo_put (me, me->buf);
    me->i_bufoffset = 0;
    return (CCN_UPCALL_RESULT_OK);
  }

  if (!info)
    return CCN_UPCALL_RESULT_ERR;       // Now why would this happen?

  // show_comps( info->content_ccnb, info->content_comps);

  if (CCN_UPCALL_INTEREST_TIMED_OUT == kind) {
    if (selfp != me->ccn_closure) {
      GST_LOG_OBJECT (me, "CCN Interest timed out on dead closure %p", selfp);
      return (CCN_UPCALL_RESULT_OK);
    }
    segment =
        ccn_ccnb_fetch_segment (info->interest_ccnb, info->interest_comps);
    GST_INFO ("...looks to be for segment: %d", segment);
    GST_LOG_OBJECT (me, "CCN upcall reexpress -- timed out");
    istate = fetchSegmentInterest (me, segment);
    if (istate) {
      if (istate->timeouts > 5) {
        GST_LOG_OBJECT (me, "CCN upcall reexpress -- too many reexpressions");
        if (segment == me->post_seg)    // We have been waiting for this one...process as an empty block to trigger other activity
          process_or_queue (me, me->post_seg, NULL, 0, FALSE);
        else
          freeInterestState (me, istate);
        post_next_interest (me);        // make sure to ask for new stuff if needed, or else we stall waiting for nothing
        return (CCN_UPCALL_RESULT_OK);
      } else {
        istate->timeouts++;
        return (CCN_UPCALL_RESULT_REEXPRESS);
      }
    } else {
      GST_LOG_OBJECT (me, "segment not found in cache: %d", segment);
      return (CCN_UPCALL_RESULT_OK);
    }

  } else if (CCN_UPCALL_CONTENT_UNVERIFIED == kind) {
    if (selfp != me->ccn_closure) {
      GST_LOG_OBJECT (me, "CCN unverified content on dead closure %p", selfp);
      return (CCN_UPCALL_RESULT_OK);
//.........这里部分代码省略.........

static GstFlowReturn
gst_goo_encjpeg_chain (GstPad* pad, GstBuffer* buffer)
{
	GST_LOG ("");

	GstGooEncJpeg* self = GST_GOO_ENCJPEG (gst_pad_get_parent (pad));
	GstGooEncJpegPrivate* priv = GST_GOO_ENCJPEG_GET_PRIVATE (self);
	GstFlowReturn ret = GST_FLOW_OK;
	GstGooAdapter* adapter = self->adapter;
	OMX_BUFFERHEADERTYPE* omx_buffer = NULL;

	GstClockTime timestamp, duration;
	guint64 offset, offsetend;
	GstBuffer* outbuf = NULL;

	if (goo_port_is_tunneled (self->inport))
	{
		GST_INFO ("Inport is tunneled");
		ret = GST_FLOW_OK;
		priv->incount++;
		goto process_output;
	}

	if (goo_port_is_eos (self->inport))
	{
		GST_INFO ("port is eos");
		ret = GST_FLOW_UNEXPECTED;
		goto fail;
	}

	if (self->component->cur_state != OMX_StateExecuting)
	{
		goto fail;
	}

	/* let's copy the timestamp meta data */
	timestamp = GST_BUFFER_TIMESTAMP (buffer);
	duration  = GST_BUFFER_DURATION (buffer);
	offset	  = GST_BUFFER_OFFSET (buffer);
	offsetend = GST_BUFFER_OFFSET_END (buffer);

	if (GST_IS_GOO_BUFFER (buffer) &&
	    goo_port_is_my_buffer (self->inport,
				   GST_GOO_BUFFER (buffer)->omx_buffer))
	{
		GST_INFO ("My own OMX buffer");
		priv->incount++;
		gst_buffer_unref (buffer); /* let's push the buffer to omx */
		ret = GST_FLOW_OK;
	}
	else if (GST_IS_GOO_BUFFER (buffer) &&
		 !goo_port_is_my_buffer (self->inport,
					 GST_GOO_BUFFER (buffer)->omx_buffer))
	{
		GST_INFO ("Other OMX buffer");

		if (GST_BUFFER_SIZE (buffer) != priv->omxbufsiz)
		{
			GST_ELEMENT_ERROR (self, STREAM, FORMAT,
					   ("Frame is incomplete (%u!=%u)",
					    GST_BUFFER_SIZE (buffer),
					    priv->omxbufsiz),
					   ("Frame is incomplete (%u!=%u)",
					    GST_BUFFER_SIZE (buffer),
					    priv->omxbufsiz));
			ret = GST_FLOW_ERROR;
		}

		omx_buffer = goo_port_grab_buffer (self->inport);
		memcpy (omx_buffer->pBuffer, GST_BUFFER_DATA (buffer),
			priv->omxbufsiz);
		omx_buffer->nFilledLen = priv->omxbufsiz;
		priv->incount++;
		goo_component_release_buffer (self->component, omx_buffer);
		gst_buffer_unref (buffer);
		ret = GST_FLOW_OK;
	}
	else
	{
		if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
		{
			gst_goo_adapter_clear (adapter);
		}

		GST_LOG ("size = %d bytes", GST_BUFFER_SIZE (buffer));
		gst_goo_adapter_push (adapter, buffer);

		guint tmp = priv->incount;
		while (gst_goo_adapter_available (adapter) >= priv->omxbufsiz &&
		       ret == GST_FLOW_OK)
		{
			GST_DEBUG ("Pushing data to OMX");
			OMX_BUFFERHEADERTYPE* omx_buffer;
			omx_buffer = goo_port_grab_buffer (self->inport);
			gst_goo_adapter_peek (adapter, priv->omxbufsiz,
					      omx_buffer);
			omx_buffer->nFilledLen = priv->omxbufsiz;
			gst_goo_adapter_flush (adapter, priv->omxbufsiz);
			priv->incount++;
			goo_component_release_buffer (self->component,
//.........这里部分代码省略.........

/*****************************************************************************
 * gst_tidmaiaccel_prepare_output_buffer
 *    Function is used to allocate output buffer
 *****************************************************************************/
static GstFlowReturn gst_tidmaiaccel_prepare_output_buffer (GstBaseTransform
    *trans, GstBuffer *inBuf, gint size, GstCaps *caps, GstBuffer **outBuf)
{
    GstTIDmaiaccel *dmaiaccel = GST_TIDMAIACCEL(trans);
    Buffer_Handle   hOutBuf;
    Bool isContiguous = FALSE;
    UInt32 phys = 0;

    /* Always check if the buffer is contiguous */
    phys = Memory_getBufferPhysicalAddress(
                    GST_BUFFER_DATA(inBuf),
                    GST_BUFFER_SIZE(inBuf),
                    &isContiguous);

    if (isContiguous && dmaiaccel->width){
        GST_DEBUG("Is contiguous video buffer");

        Memory_registerContigBuf((UInt32)GST_BUFFER_DATA(inBuf),
            GST_BUFFER_SIZE(inBuf),phys);
        /* This is a contiguous buffer, create a dmai buffer transport */
        BufferGfx_Attrs gfxAttrs    = BufferGfx_Attrs_DEFAULT;

        gfxAttrs.bAttrs.reference   = TRUE;
        gfxAttrs.dim.width          = dmaiaccel->width;
        gfxAttrs.dim.height         = dmaiaccel->height;
        gfxAttrs.colorSpace         = dmaiaccel->colorSpace;
        gfxAttrs.dim.lineLength     = dmaiaccel->lineLength;

        hOutBuf = Buffer_create(GST_BUFFER_SIZE(inBuf), &gfxAttrs.bAttrs);
        BufferGfx_setDimensions(hOutBuf,&gfxAttrs.dim);
        BufferGfx_setColorSpace(hOutBuf,gfxAttrs.colorSpace);
        Buffer_setUserPtr(hOutBuf, (Int8*)GST_BUFFER_DATA(inBuf));
        Buffer_setNumBytesUsed(hOutBuf, GST_BUFFER_SIZE(inBuf));
        *outBuf = gst_tidmaibuffertransport_new(hOutBuf, NULL, NULL, FALSE);
        gst_buffer_set_data(*outBuf, (guint8*) Buffer_getUserPtr(hOutBuf),
            Buffer_getSize(hOutBuf));
        gst_buffer_copy_metadata(*outBuf,inBuf,GST_BUFFER_COPY_ALL);
        gst_buffer_set_caps(*outBuf, GST_PAD_CAPS(trans->srcpad));

        /* We need to grab a reference to the input buffer since we have 
         * a pointer to his buffer */
        gst_buffer_ref(inBuf);

        gst_tidmaibuffertransport_set_release_callback(
            (GstTIDmaiBufferTransport *)*outBuf,
            dmaiaccel_release_cb,inBuf);

        return GST_FLOW_OK;
    } else {
        GST_DEBUG("Copying into contiguous video buffer");
        /* This is a contiguous buffer, create a dmai buffer transport */
        if (!dmaiaccel->bufTabAllocated){
            /* Initialize our buffer tab */
            BufferGfx_Attrs gfxAttrs    = BufferGfx_Attrs_DEFAULT;

            gfxAttrs.dim.width          = dmaiaccel->width;
            gfxAttrs.dim.height         = dmaiaccel->height;
            gfxAttrs.colorSpace         = dmaiaccel->colorSpace;
            gfxAttrs.dim.lineLength     = dmaiaccel->lineLength;

            dmaiaccel->hOutBufTab =
                        BufTab_create(2, GST_BUFFER_SIZE(inBuf),
                            BufferGfx_getBufferAttrs(&gfxAttrs));
            pthread_mutex_init(&dmaiaccel->bufTabMutex, NULL);
            pthread_cond_init(&dmaiaccel->bufTabCond, NULL);
            if (dmaiaccel->hOutBufTab == NULL) {
                GST_ELEMENT_ERROR(dmaiaccel,RESOURCE,NO_SPACE_LEFT,(NULL),
                    ("failed to create output buffer tab"));
                return GST_FLOW_ERROR;
            }
            dmaiaccel->bufTabAllocated = TRUE;
        }

        pthread_mutex_lock(&dmaiaccel->bufTabMutex);
        hOutBuf = BufTab_getFreeBuf(dmaiaccel->hOutBufTab);
        if (hOutBuf == NULL) {
            GST_INFO("Failed to get free buffer, waiting on bufTab\n");
            pthread_cond_wait(&dmaiaccel->bufTabCond, &dmaiaccel->bufTabMutex);

            hOutBuf = BufTab_getFreeBuf(dmaiaccel->hOutBufTab);

            if (hOutBuf == NULL) {
                GST_ELEMENT_ERROR(dmaiaccel,RESOURCE,NO_SPACE_LEFT,(NULL),
                    ("failed to get a free contiguous buffer from BufTab"));
                pthread_mutex_unlock(&dmaiaccel->bufTabMutex);
                return GST_FLOW_ERROR;
            }
        }
        pthread_mutex_unlock(&dmaiaccel->bufTabMutex);

        memcpy(Buffer_getUserPtr(hOutBuf),GST_BUFFER_DATA(inBuf),
            GST_BUFFER_SIZE(inBuf));
        Buffer_setNumBytesUsed(hOutBuf, GST_BUFFER_SIZE(inBuf));
        *outBuf = gst_tidmaibuffertransport_new(hOutBuf, &dmaiaccel->bufTabMutex,
            &dmaiaccel->bufTabCond, FALSE);
        gst_buffer_set_data(*outBuf, (guint8*) Buffer_getUserPtr(hOutBuf),
//.........这里部分代码省略.........

static GstFlowReturn
gst_xvidenc_chain (GstPad * pad, GstBuffer * buf)
{
  GstXvidEnc *xvidenc = GST_XVIDENC (GST_PAD_PARENT (pad));
  GstBuffer *outbuf;
  xvid_enc_frame_t xframe;

  const gint motion_presets[] = {
    0, 0, 0, 0,
    XVID_ME_HALFPELREFINE16,
    XVID_ME_HALFPELREFINE16 | XVID_ME_ADVANCEDDIAMOND16,
    XVID_ME_HALFPELREFINE16 | XVID_ME_EXTSEARCH16
        | XVID_ME_HALFPELREFINE8 | XVID_ME_USESQUARES16
  };

  if (!xvidenc->handle) {
    GST_ELEMENT_ERROR (xvidenc, CORE, NEGOTIATION, (NULL),
        ("format wasn't negotiated before chain function"));
    gst_buffer_unref (buf);
    return GST_FLOW_NOT_NEGOTIATED;
  }

  GST_DEBUG_OBJECT (xvidenc,
      "Received buffer of time %" GST_TIME_FORMAT ", size %d",
      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_SIZE (buf));

  if (xvidenc->xframe_cache)
    memcpy (&xframe, xvidenc->xframe_cache, sizeof (xframe));
  else {                        /* need to build some inital xframe to be cached */
    /* encode and so ... */
    gst_xvid_init_struct (xframe);

    if (xvidenc->par_width == xvidenc->par_height)
      xframe.par = XVID_PAR_11_VGA;
    else {
      xframe.par = XVID_PAR_EXT;
      xframe.par_width = xvidenc->par_width;
      xframe.par_height = xvidenc->par_height;
    }

    /* handle options */
    xframe.vol_flags |= xvidenc->quant_type;
    xframe.vop_flags = XVID_VOP_HALFPEL;
    xframe.motion = motion_presets[xvidenc->motion];

    if (xvidenc->me_chroma) {
      xframe.motion |= XVID_ME_CHROMA_PVOP;
      xframe.motion |= XVID_ME_CHROMA_BVOP;
    }

    if (xvidenc->me_vhq >= 1) {
      xframe.vop_flags |= XVID_VOP_MODEDECISION_RD;
    }
    if (xvidenc->me_vhq >= 2) {
      xframe.motion |= XVID_ME_HALFPELREFINE16_RD;
      xframe.motion |= XVID_ME_QUARTERPELREFINE16_RD;
    }
    if (xvidenc->me_vhq >= 3) {
      xframe.motion |= XVID_ME_HALFPELREFINE8_RD;
      xframe.motion |= XVID_ME_QUARTERPELREFINE8_RD;
      xframe.motion |= XVID_ME_CHECKPREDICTION_RD;
    }
    if (xvidenc->me_vhq >= 4) {
      xframe.motion |= XVID_ME_EXTSEARCH_RD;
    }

    /* no motion estimation, then only intra */
    if (xvidenc->motion == 0) {
      xframe.type = XVID_TYPE_IVOP;
    } else {
      xframe.type = XVID_TYPE_AUTO;
    }

    if (xvidenc->motion > 4) {
      xframe.vop_flags |= XVID_VOP_INTER4V;
    }

    if (xvidenc->me_quarterpel) {
      xframe.vol_flags |= XVID_VOL_QUARTERPEL;
      xframe.motion |= XVID_ME_QUARTERPELREFINE16;
      xframe.motion |= XVID_ME_QUARTERPELREFINE8;
    }

    if (xvidenc->gmc) {
      xframe.vol_flags |= XVID_VOL_GMC;
      xframe.motion |= XVID_ME_GME_REFINE;
    }

    if (xvidenc->interlaced) {
      xframe.vol_flags |= XVID_VOL_INTERLACING;
    }

    if (xvidenc->trellis) {
      xframe.vop_flags |= XVID_VOP_TRELLISQUANT;
    }

    if (xvidenc->hqacpred) {
      xframe.vop_flags |= XVID_VOP_HQACPRED;
    }

//.........这里部分代码省略.........

static GstFlowReturn
gst_rtp_speex_pay_handle_buffer (GstBaseRTPPayload * basepayload,
    GstBuffer * buffer)
{
  GstRtpSPEEXPay *rtpspeexpay;
  guint size, payload_len;
  GstBuffer *outbuf;
  guint8 *payload, *data;
  GstClockTime timestamp, duration;
  GstFlowReturn ret;

  rtpspeexpay = GST_RTP_SPEEX_PAY (basepayload);

  size = GST_BUFFER_SIZE (buffer);
  data = GST_BUFFER_DATA (buffer);

  switch (rtpspeexpay->packet) {
    case 0:
      /* ident packet. We need to parse the headers to construct the RTP
       * properties. */
      if (!gst_rtp_speex_pay_parse_ident (rtpspeexpay, data, size))
        goto parse_error;

      ret = GST_FLOW_OK;
      goto done;
    case 1:
      /* comment packet, we ignore it */
      ret = GST_FLOW_OK;
      goto done;
    default:
      /* other packets go in the payload */
      break;
  }

  timestamp = GST_BUFFER_TIMESTAMP (buffer);
  duration = GST_BUFFER_DURATION (buffer);

  /* FIXME, only one SPEEX frame per RTP packet for now */
  payload_len = size;

  outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
  /* FIXME, assert for now */
  g_assert (payload_len <= GST_BASE_RTP_PAYLOAD_MTU (rtpspeexpay));

  /* copy timestamp and duration */
  GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
  GST_BUFFER_DURATION (outbuf) = duration;

  /* get payload */
  payload = gst_rtp_buffer_get_payload (outbuf);

  /* copy data in payload */
  memcpy (&payload[0], data, size);

  ret = gst_basertppayload_push (basepayload, outbuf);

done:
  gst_buffer_unref (buffer);

  rtpspeexpay->packet++;

  return ret;

  /* ERRORS */
parse_error:
  {
    GST_ELEMENT_ERROR (rtpspeexpay, STREAM, DECODE, (NULL),
        ("Error parsing first identification packet."));
    gst_buffer_unref (buffer);
    return GST_FLOW_ERROR;
  }
}

HRESULT AudioFakeSink::DoRenderSample(IMediaSample *pMediaSample)
{
  GstBuffer *out_buf = NULL;
  gboolean in_seg = FALSE;
  GstClockTime buf_start, buf_stop;
  gint64 clip_start = 0, clip_stop = 0;
  guint start_offset = 0, stop_offset;
  GstClockTime duration;

  if(pMediaSample)
  {
    BYTE *pBuffer = NULL;
    LONGLONG lStart = 0, lStop = 0;
    long size = pMediaSample->GetActualDataLength();

    pMediaSample->GetPointer(&pBuffer);
    pMediaSample->GetTime(&lStart, &lStop);
    
    if (!GST_CLOCK_TIME_IS_VALID (mDec->timestamp)) {
      // Convert REFERENCE_TIME to GST_CLOCK_TIME
      mDec->timestamp = (GstClockTime)lStart * 100;
    }
    duration = (lStop - lStart) * 100;

    buf_start = mDec->timestamp;
    buf_stop = mDec->timestamp + duration;

    /* save stop position to start next buffer with it */
    mDec->timestamp = buf_stop;

    /* check if this buffer is in our current segment */
    in_seg = gst_segment_clip (mDec->segment, GST_FORMAT_TIME,
        buf_start, buf_stop, &clip_start, &clip_stop);

    /* if the buffer is out of segment do not push it downstream */
    if (!in_seg) {
      GST_DEBUG_OBJECT (mDec,
          "buffer is out of segment, start %" GST_TIME_FORMAT " stop %"
          GST_TIME_FORMAT, GST_TIME_ARGS (buf_start), GST_TIME_ARGS (buf_stop));
      goto done;
    }

    /* buffer is entirely or partially in-segment, so allocate a
     * GstBuffer for output, and clip if required */

    /* allocate a new buffer for raw audio */
    mDec->last_ret = gst_pad_alloc_buffer (mDec->srcpad, 
        GST_BUFFER_OFFSET_NONE,
        size,
        GST_PAD_CAPS (mDec->srcpad), &out_buf);
    if (!out_buf) {
      GST_WARNING_OBJECT (mDec, "cannot allocate a new GstBuffer");
      goto done;
    }

    /* set buffer properties */
    GST_BUFFER_TIMESTAMP (out_buf) = buf_start;
    GST_BUFFER_DURATION (out_buf) = duration;
    memcpy (GST_BUFFER_DATA (out_buf), pBuffer,
        MIN ((unsigned int)size, GST_BUFFER_SIZE (out_buf)));

    /* we have to remove some heading samples */
    if ((GstClockTime) clip_start > buf_start) {
      start_offset = (guint)gst_util_uint64_scale_int (clip_start - buf_start,
          mDec->rate, GST_SECOND) * mDec->depth / 8 * mDec->channels;
    }
    else
      start_offset = 0;
    /* we have to remove some trailing samples */
    if ((GstClockTime) clip_stop < buf_stop) {
      stop_offset = (guint)gst_util_uint64_scale_int (buf_stop - clip_stop,
          mDec->rate, GST_SECOND) * mDec->depth / 8 * mDec->channels;
    }
    else
      stop_offset = size;

    /* truncating */
    if ((start_offset != 0) || (stop_offset != (size_t) size)) {
      GstBuffer *subbuf = gst_buffer_create_sub (out_buf, start_offset,
          stop_offset - start_offset);

      if (subbuf) {
        gst_buffer_set_caps (subbuf, GST_PAD_CAPS (mDec->srcpad));
        gst_buffer_unref (out_buf);
        out_buf = subbuf;
      }
    }

    GST_BUFFER_TIMESTAMP (out_buf) = clip_start;
    GST_BUFFER_DURATION (out_buf) = clip_stop - clip_start;

    /* replace the saved stop position by the clipped one */
    mDec->timestamp = clip_stop;

    GST_DEBUG_OBJECT (mDec,
        "push_buffer (size %d)=> pts %" GST_TIME_FORMAT " stop %" GST_TIME_FORMAT
        " duration %" GST_TIME_FORMAT, size,
        GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out_buf)),
        GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (out_buf) +
            GST_BUFFER_DURATION (out_buf)),
//.........这里部分代码省略.........

static GstFlowReturn
gst_tta_dec_chain (GstPad * pad, GstBuffer * in)
{
  GstTtaDec *ttadec;
  GstBuffer *outbuf, *buf = GST_BUFFER (in);
  guchar *data, *p;
  decoder *dec;
  unsigned long outsize;
  unsigned long size;
  guint32 frame_samples;
  long res;
  long *prev;

  ttadec = GST_TTA_DEC (GST_OBJECT_PARENT (pad));

  data = GST_BUFFER_DATA (buf);
  size = GST_BUFFER_SIZE (buf);

  ttadec->tta_buf.bit_count = 0;
  ttadec->tta_buf.bit_cache = 0;
  ttadec->tta_buf.bitpos = ttadec->tta_buf.buffer_end;
  ttadec->tta_buf.offset = 0;
  decoder_init (ttadec->tta, ttadec->channels, ttadec->bytes);

  if (GST_BUFFER_DURATION_IS_VALID (buf)) {
    frame_samples =
        ceil ((gdouble) (GST_BUFFER_DURATION (buf) * ttadec->samplerate) /
        (gdouble) GST_SECOND);
  } else {
    frame_samples = ttadec->samplerate * FRAME_TIME;
  }
  outsize = ttadec->channels * frame_samples * ttadec->bytes;

  dec = ttadec->tta;
  p = ttadec->decdata;
  prev = ttadec->cache;
  for (res = 0;
      p < ttadec->decdata + frame_samples * ttadec->channels * ttadec->bytes;) {
    unsigned long unary, binary, depth, k;
    long value, temp_value;
    fltst *fst = &dec->fst;
    adapt *rice = &dec->rice;
    long *last = &dec->last;

    // decode Rice unsigned
    get_unary (&ttadec->tta_buf, data, size, &unary);

    switch (unary) {
      case 0:
        depth = 0;
        k = rice->k0;
        break;
      default:
        depth = 1;
        k = rice->k1;
        unary--;
    }

    if (k) {
      get_binary (&ttadec->tta_buf, data, size, &binary, k);
      value = (unary << k) + binary;
    } else
      value = unary;

    switch (depth) {
      case 1:
        rice->sum1 += value - (rice->sum1 >> 4);
        if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
          rice->k1--;
        else if (rice->sum1 > shift_16[rice->k1 + 1])
          rice->k1++;
        value += bit_shift[rice->k0];
      default:
        rice->sum0 += value - (rice->sum0 >> 4);
        if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
          rice->k0--;
        else if (rice->sum0 > shift_16[rice->k0 + 1])
          rice->k0++;
    }

    /* this only uses a temporary variable to silence a gcc warning */
    temp_value = DEC (value);
    value = temp_value;

    // decompress stage 1: adaptive hybrid filter
    hybrid_filter (fst, &value);

    // decompress stage 2: fixed order 1 prediction
    switch (ttadec->bytes) {
      case 1:
        value += PREDICTOR1 (*last, 4);
        break;                  // bps 8
      case 2:
        value += PREDICTOR1 (*last, 5);
        break;                  // bps 16
      case 3:
        value += PREDICTOR1 (*last, 5);
        break;                  // bps 24
      case 4:
        value += *last;
//.........这里部分代码省略.........

static gboolean
gst_aiff_parse_parse_comm (GstAiffParse * aiff, GstBuffer * buf)
{
  guint8 *data;
  int size;

  if (aiff->is_aifc)
    size = 22;
  else
    size = 18;

  if (GST_BUFFER_SIZE (buf) < size) {
    GST_WARNING_OBJECT (aiff, "COMM chunk too short, cannot parse header");
    return FALSE;
  }

  data = GST_BUFFER_DATA (buf);

  aiff->channels = GST_READ_UINT16_BE (data);
  aiff->total_frames = GST_READ_UINT32_BE (data + 2);
  aiff->depth = GST_READ_UINT16_BE (data + 6);
  aiff->width = GST_ROUND_UP_8 (aiff->depth);
  aiff->rate = (int) gst_aiff_parse_read_IEEE80 (data + 8);

  aiff->floating_point = FALSE;

  if (aiff->is_aifc) {
    guint32 fourcc = GST_READ_UINT32_LE (data + 18);

    /* We only support the 'trivial' uncompressed AIFC, but it can be
     * either big or little endian */
    switch (fourcc) {
      case GST_MAKE_FOURCC ('N', 'O', 'N', 'E'):
        aiff->endianness = G_BIG_ENDIAN;
        break;
      case GST_MAKE_FOURCC ('s', 'o', 'w', 't'):
        aiff->endianness = G_LITTLE_ENDIAN;
        break;
      case GST_MAKE_FOURCC ('F', 'L', '3', '2'):
      case GST_MAKE_FOURCC ('f', 'l', '3', '2'):
        aiff->floating_point = TRUE;
        aiff->width = aiff->depth = 32;
        aiff->endianness = G_BIG_ENDIAN;
        break;
      case GST_MAKE_FOURCC ('f', 'l', '6', '4'):
        aiff->floating_point = TRUE;
        aiff->width = aiff->depth = 64;
        aiff->endianness = G_BIG_ENDIAN;
        break;
      default:
        GST_WARNING_OBJECT (aiff, "Unsupported compression in AIFC "
            "file: %" GST_FOURCC_FORMAT,
            GST_FOURCC_ARGS (GST_READ_UINT32_LE (data + 18)));
        return FALSE;

    }
  } else
    aiff->endianness = G_BIG_ENDIAN;

  return TRUE;
}

//.........这里部分代码省略.........
          size = MIN (datasize, (upstream_size - aiff->datastart));
        }
        aiff->datasize = (guint64) datasize;
        aiff->dataleft = (guint64) datasize;
        aiff->end_offset = datasize + aiff->datastart;
        if (!aiff->streaming) {
          /* We will continue looking at chunks until the end - to read tags,
           * etc. */
          aiff->offset += datasize;
        }
        GST_DEBUG_OBJECT (aiff, "datasize = %d", datasize);
        if (aiff->streaming) {
          done = TRUE;
        }
        break;
      }
      case GST_MAKE_FOURCC ('I', 'D', '3', ' '):{
        GstTagList *tags;

        if (aiff->streaming) {
          if (!gst_aiff_parse_peek_chunk (aiff, &tag, &size))
            return GST_FLOW_OK;

          gst_adapter_flush (aiff->adapter, 8);
          aiff->offset += 8;

          buf = gst_adapter_take_buffer (aiff->adapter, size);
        } else {
          if ((res = gst_aiff_parse_read_chunk (aiff,
                      &aiff->offset, &tag, &buf)) != GST_FLOW_OK)
            return res;
        }

        GST_LOG_OBJECT (aiff, "ID3 chunk of size %u", GST_BUFFER_SIZE (buf));

        tags = gst_tag_list_from_id3v2_tag (buf);
        gst_buffer_unref (buf);

        GST_INFO_OBJECT (aiff, "ID3 tags: %" GST_PTR_FORMAT, tags);

        if (aiff->tags == NULL) {
          aiff->tags = tags;
        } else {
          gst_tag_list_insert (aiff->tags, tags, GST_TAG_MERGE_APPEND);
          gst_tag_list_free (tags);
        }
        break;
      }
      default:
        gst_aiff_parse_ignore_chunk (aiff, buf, tag, size);
    }

    if (upstream_size && (aiff->offset >= upstream_size)) {
      /* Now we have gone through the whole file */
      done = TRUE;
    }
  }

  /* We read all the chunks (in pull mode) or reached the SSND chunk
   * (in push mode). We must have both COMM and SSND now; error out 
   * otherwise.
   */
  if (!aiff->got_comm) {
    GST_WARNING_OBJECT (aiff, "Failed to find COMM chunk");
    goto no_header;
  }

/* protected helper method which can be used by derived classes:
 */
GstFlowReturn
gst_omx_base_src_create_from_port (GstOmxBaseSrc *self,
                                   GOmxPort *out_port,
                                   GstBuffer **ret_buf)
{
    GOmxCore *gomx;
    GstFlowReturn ret = GST_FLOW_OK;

    gomx = self->gomx;

    GST_LOG_OBJECT (self, "begin");

    if (out_port->enabled)
    {
        if (G_UNLIKELY (gomx->omx_state == OMX_StateIdle))
        {
            GST_INFO_OBJECT (self, "omx: play");
            g_omx_core_start (gomx);
        }

        if (G_UNLIKELY (gomx->omx_state != OMX_StateExecuting))
        {
            GST_ERROR_OBJECT (self, "Whoa! very wrong");
            ret = GST_FLOW_ERROR;
            goto beach;
        }

        while (out_port->enabled)
        {
            gpointer obj = g_omx_port_recv (out_port);

            if (G_UNLIKELY (!obj))
            {
                ret = GST_FLOW_ERROR;
                break;
            }

            if (G_LIKELY (GST_IS_BUFFER (obj)))
            {
                GstBuffer *buf = GST_BUFFER (obj);
                if (G_LIKELY (GST_BUFFER_SIZE (buf) > 0))
                {
                    PRINT_BUFFER (self, buf);
                    *ret_buf = buf;
                    break;
                }
            }
            else if (GST_IS_EVENT (obj))
            {
                GST_INFO_OBJECT (self, "got eos");
                g_omx_core_set_done (gomx);
                break;
            }
        }
    }

    if (!out_port->enabled)
    {
        GST_WARNING_OBJECT (self, "done");
        ret = GST_FLOW_UNEXPECTED;
    }

beach:

    GST_LOG_OBJECT (self, "end");

    return ret;
}

static GstFlowReturn
gst_aiff_parse_stream_data (GstAiffParse * aiff)
{
  GstBuffer *buf = NULL;
  GstFlowReturn res = GST_FLOW_OK;
  guint64 desired, obtained;
  GstClockTime timestamp, next_timestamp, duration;
  guint64 pos, nextpos;

iterate_adapter:
  GST_LOG_OBJECT (aiff,
      "offset: %" G_GINT64_FORMAT " , end: %" G_GINT64_FORMAT " , dataleft: %"
      G_GINT64_FORMAT, aiff->offset, aiff->end_offset, aiff->dataleft);

  /* Get the next n bytes and output them */
  if (aiff->dataleft == 0 || aiff->dataleft < aiff->bytes_per_sample)
    goto found_eos;

  /* scale the amount of data by the segment rate so we get equal
   * amounts of data regardless of the playback rate */
  desired =
      MIN (gst_guint64_to_gdouble (aiff->dataleft),
      MAX_BUFFER_SIZE * aiff->segment.abs_rate);

  if (desired >= aiff->bytes_per_sample && aiff->bytes_per_sample > 0)
    desired -= (desired % aiff->bytes_per_sample);

  GST_LOG_OBJECT (aiff, "Fetching %" G_GINT64_FORMAT " bytes of data "
      "from the sinkpad", desired);

  if (aiff->streaming) {
    guint avail = gst_adapter_available (aiff->adapter);

    if (avail < desired) {
      GST_LOG_OBJECT (aiff, "Got only %d bytes of data from the sinkpad",
          avail);
      return GST_FLOW_OK;
    }

    buf = gst_adapter_take_buffer (aiff->adapter, desired);
  } else {
    if ((res = gst_pad_pull_range (aiff->sinkpad, aiff->offset,
                desired, &buf)) != GST_FLOW_OK)
      goto pull_error;
  }

  /* If we have a pending close/start segment, send it now. */
  if (G_UNLIKELY (aiff->close_segment != NULL)) {
    gst_pad_push_event (aiff->srcpad, aiff->close_segment);
    aiff->close_segment = NULL;
  }
  if (G_UNLIKELY (aiff->start_segment != NULL)) {
    gst_pad_push_event (aiff->srcpad, aiff->start_segment);
    aiff->start_segment = NULL;
  }
  if (G_UNLIKELY (aiff->tags != NULL)) {
    gst_element_found_tags_for_pad (GST_ELEMENT_CAST (aiff), aiff->srcpad,
        aiff->tags);
    aiff->tags = NULL;
  }

  obtained = GST_BUFFER_SIZE (buf);

  /* our positions in bytes */
  pos = aiff->offset - aiff->datastart;
  nextpos = pos + obtained;

  /* update offsets, does not overflow. */
  GST_BUFFER_OFFSET (buf) = pos / aiff->bytes_per_sample;
  GST_BUFFER_OFFSET_END (buf) = nextpos / aiff->bytes_per_sample;

  if (aiff->bps > 0) {
    /* and timestamps if we have a bitrate, be careful for overflows */
    timestamp =
        gst_util_uint64_scale_ceil (pos, GST_SECOND, (guint64) aiff->bps);
    next_timestamp =
        gst_util_uint64_scale_ceil (nextpos, GST_SECOND, (guint64) aiff->bps);
    duration = next_timestamp - timestamp;

    /* update current running segment position */
    gst_segment_set_last_stop (&aiff->segment, GST_FORMAT_TIME, next_timestamp);
  } else {
    /* no bitrate, all we know is that the first sample has timestamp 0, all
     * other positions and durations have unknown timestamp. */
    if (pos == 0)
      timestamp = 0;
    else
      timestamp = GST_CLOCK_TIME_NONE;
    duration = GST_CLOCK_TIME_NONE;
    /* update current running segment position with byte offset */
    gst_segment_set_last_stop (&aiff->segment, GST_FORMAT_BYTES, nextpos);
  }
  if (aiff->discont) {
    GST_DEBUG_OBJECT (aiff, "marking DISCONT");
    GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
    aiff->discont = FALSE;
  }

  GST_BUFFER_TIMESTAMP (buf) = timestamp;
  GST_BUFFER_DURATION (buf) = duration;
//.........这里部分代码省略.........

/**
 * gst_tag_list_from_xmp_buffer:
 * @buffer: buffer
 *
 * Parse a xmp packet into a taglist.
 *
 * Returns: new taglist or %NULL, free the list when done
 *
 * Since: 0.10.29
 */
GstTagList *
gst_tag_list_from_xmp_buffer (const GstBuffer * buffer)
{
  GstTagList *list = NULL;
  const gchar *xps, *xp1, *xp2, *xpe, *ns, *ne;
  guint len, max_ft_len;
  gboolean in_tag;
  gchar *part, *pp;
  guint i;
  const gchar *last_tag = NULL;
  XmpTag *last_xmp_tag = NULL;
  GSList *pending_tags = NULL;

  xmp_tags_initialize ();

  g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
  g_return_val_if_fail (GST_BUFFER_SIZE (buffer) > 0, NULL);

  xps = (const gchar *) GST_BUFFER_DATA (buffer);
  len = GST_BUFFER_SIZE (buffer);
  xpe = &xps[len + 1];

  /* check header and footer */
  xp1 = g_strstr_len (xps, len, "<?xpacket begin");
  if (!xp1)
    goto missing_header;
  xp1 = &xp1[strlen ("<?xpacket begin")];
  while (*xp1 != '>' && *xp1 != '<' && xp1 < xpe)
    xp1++;
  if (*xp1 != '>')
    goto missing_header;

  max_ft_len = 1 + strlen ("<?xpacket end=\".\"?>\n");
  if (len < max_ft_len)
    goto missing_footer;

  GST_DEBUG ("checking footer: [%s]", &xps[len - max_ft_len]);
  xp2 = g_strstr_len (&xps[len - max_ft_len], max_ft_len, "<?xpacket ");
  if (!xp2)
    goto missing_footer;

  GST_INFO ("xmp header okay");

  /* skip > and text until first xml-node */
  xp1++;
  while (*xp1 != '<' && xp1 < xpe)
    xp1++;

  /* no tag can be longer that the whole buffer */
  part = g_malloc (xp2 - xp1);
  list = gst_tag_list_new ();

  /* parse data into a list of nodes */
  /* data is between xp1..xp2 */
  in_tag = TRUE;
  ns = ne = xp1;
  pp = part;
  while (ne < xp2) {
    if (in_tag) {
      ne++;
      while (ne < xp2 && *ne != '>' && *ne != '<') {
        if (*ne == '\n' || *ne == '\t' || *ne == ' ') {
          while (ne < xp2 && (*ne == '\n' || *ne == '\t' || *ne == ' '))
            ne++;
          *pp++ = ' ';
        } else {
          *pp++ = *ne++;
        }
      }
      *pp = '\0';
      if (*ne != '>')
        goto broken_xml;
      /* create node */
      /* {XML, ns, ne-ns} */
      if (ns[0] != '/') {
        gchar *as = strchr (part, ' ');
        /* only log start nodes */
        GST_INFO ("xml: %s", part);

        if (as) {
          gchar *ae, *d;

          /* skip ' ' and scan the attributes */
          as++;
          d = ae = as;

          /* split attr=value pairs */
          while (*ae != '\0') {
            if (*ae == '=') {
              /* attr/value delimmiter */
//.........这里部分代码省略.........

static gboolean
spc_setup (GstSpcDec * spc)
{
  spc_tag_info *info;
  GstTagList *taglist;
  guint64 total_duration;

  if (!spc->buf || !spc_negotiate (spc)) {
    return FALSE;
  }

  info = &(spc->tag_info);

  spc_tag_get_info (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf),
      info);

  taglist = gst_tag_list_new ();

  if (info->title)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE,
        info->title, NULL);
  if (info->artist)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST,
        info->artist, NULL);
  /* Prefer the name of the official soundtrack over the name of the game (since this is
   * how track numbers are derived)
   */
  if (info->album)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM,
        info->album, NULL);
  else if (info->game)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM, info->game,
        NULL);
  if (info->year) {
    GDate *date = g_date_new_dmy (1, 1, info->year);

    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_DATE, date, NULL);
    g_date_free (date);
  }
  if (info->track) {
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TRACK_NUMBER,
        info->track, NULL);
  }
  if (info->comment)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_COMMENT,
        info->comment, NULL);
  if (info->disc)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
        GST_TAG_ALBUM_VOLUME_NUMBER, info->disc, NULL);
  if (info->publisher)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ORGANIZATION,
        info->publisher, NULL);
  if (info->dumper)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_CONTACT,
        info->dumper, NULL);
  if (info->emulator)
    gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER,
        info->emulator == EMU_ZSNES ? "ZSNES" : "Snes9x", NULL);

  total_duration = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));

  gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
      GST_TAG_DURATION, total_duration,
      GST_TAG_GENRE, "Game", GST_TAG_CODEC, "SPC700", NULL);

  gst_element_found_tags_for_pad (GST_ELEMENT (spc), spc->srcpad, taglist);

  /* spc_tag_info_free(&info); */


  if (OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf)) != 0) {
    return FALSE;
  }

  gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, 1.0,
          GST_FORMAT_TIME, 0, -1, 0));

  gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play, spc->srcpad);

  /* We can't unreference this buffer because we might need to re-initialize
   * the emulator with the original data during a reverse seek
   * gst_buffer_unref (spc->buf);
   * spc->buf = NULL;
   */
  spc->initialized = TRUE;
  spc->seeking = FALSE;
  spc->seekpoint = 0;
  spc->byte_pos = 0;
  return spc->initialized;
}

static void
spc_play (GstPad * pad)
{
  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
  GstFlowReturn flow_return;
  GstBuffer *out;
  gboolean seeking = spc->seeking;
  gint64 duration, fade, end, position;

  if (!seeking) {
    out = gst_buffer_new_and_alloc (1600 * 4);
    gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
    GST_BUFFER_TIMESTAMP (out) =
        (gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
        32000 * 2 * 2);
    spc->byte_pos += OSPC_Run (-1, (short *) GST_BUFFER_DATA (out), 1600 * 4);
  } else {
    if (spc->seekpoint < spc->byte_pos) {
      OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf));
      spc->byte_pos = 0;
    }
    spc->byte_pos += OSPC_Run (-1, NULL, 1600 * 4);
    if (spc->byte_pos >= spc->seekpoint) {
      spc->seeking = FALSE;
    }
    out = gst_buffer_new ();
    gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
  }

  duration = gst_spc_duration (spc);
  fade = gst_spc_fadeout (spc);
  end = duration + fade;
  position =
      (gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
      32000 * 2 * 2);

  if (position >= duration) {
    gint16 *data = (gint16 *) GST_BUFFER_DATA (out);
    guint32 size = GST_BUFFER_SIZE (out) / sizeof (gint16);
    unsigned int i;

    gint64 num = (fade - (position - duration));

    for (i = 0; i < size; i++) {
      /* Apply a parabolic volume envelope */
      data[i] = (gint16) (data[i] * num / fade * num / fade);
    }
  }

  if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
    GST_DEBUG_OBJECT (spc, "pausing task, reason %s",
        gst_flow_get_name (flow_return));

    gst_pad_pause_task (pad);

    if (flow_return <= GST_FLOW_UNEXPECTED
        || flow_return == GST_FLOW_NOT_LINKED) {
      gst_pad_push_event (pad, gst_event_new_eos ());
    }
  }

  if (position >= end) {
    gst_pad_pause_task (pad);
    gst_pad_push_event (pad, gst_event_new_eos ());
  }

  gst_object_unref (spc);

  return;
}

static gboolean
gst_vdp_h264_dec_set_sink_caps (GstBaseVideoDecoder * base_video_decoder,
    GstCaps * caps)
{
  GstVdpH264Dec *h264_dec;
  GstStructure *structure;
  const GValue *value;

  h264_dec = GST_VDP_H264_DEC (base_video_decoder);

  structure = gst_caps_get_structure (caps, 0);
  /* packetized video has a codec_data */
  if ((value = gst_structure_get_value (structure, "codec_data"))) {
    GstBuffer *buf;
    GstBitReader reader;
    guint8 version;
    guint8 n_sps, n_pps;
    gint i;

    GST_DEBUG_OBJECT (h264_dec, "have packetized h264");
    h264_dec->packetized = TRUE;

    buf = gst_value_get_buffer (value);
    GST_MEMDUMP ("avcC:", GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));

    /* parse the avcC data */
    if (GST_BUFFER_SIZE (buf) < 7) {
      GST_ERROR_OBJECT (h264_dec, "avcC size %u < 7", GST_BUFFER_SIZE (buf));
      return FALSE;
    }

    gst_bit_reader_init_from_buffer (&reader, buf);

    READ_UINT8 (&reader, version, 8);
    if (version != 1)
      return FALSE;

    SKIP (&reader, 30);

    READ_UINT8 (&reader, h264_dec->nal_length_size, 2);
    h264_dec->nal_length_size += 1;
    GST_DEBUG_OBJECT (h264_dec, "nal length %u", h264_dec->nal_length_size);

    SKIP (&reader, 3);

    READ_UINT8 (&reader, n_sps, 5);
    for (i = 0; i < n_sps; i++) {
      guint16 sps_length;
      guint8 *data;

      READ_UINT16 (&reader, sps_length, 16);
      sps_length -= 1;
      SKIP (&reader, 8);

      data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
      if (!gst_h264_parser_parse_sequence (h264_dec->parser, data, sps_length))
        return FALSE;

      SKIP (&reader, sps_length * 8);
    }

    READ_UINT8 (&reader, n_pps, 8);
    for (i = 0; i < n_pps; i++) {
      guint16 pps_length;
      guint8 *data;

      READ_UINT16 (&reader, pps_length, 16);
      pps_length -= 1;
      SKIP (&reader, 8);

      data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
      if (!gst_h264_parser_parse_picture (h264_dec->parser, data, pps_length))
        return FALSE;

      SKIP (&reader, pps_length * 8);
    }
  }

  return TRUE;
}