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synced 2024-11-10 03:19:40 +00:00
h264: exclusively use GstAdapter, drop sub-buffer hack.
Maintaining the sub-buffer is rather suboptimal especially since we were also maintaining a GstAdapter. Now, we only use the GstAdapter thus requiring minor extra parsing when receiving avcC buffers.
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parent
3d7e4a3a33
commit
dde9232e10
1 changed files with 63 additions and 39 deletions
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@ -253,7 +253,6 @@ G_DEFINE_TYPE(GstVaapiDecoderH264,
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struct _GstVaapiDecoderH264Private {
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GstAdapter *adapter;
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GstBuffer *sub_buffer;
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GstH264NalParser *parser;
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GstH264SPS *sps;
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GstH264SPS last_sps;
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@ -526,11 +525,6 @@ gst_vaapi_decoder_h264_close(GstVaapiDecoderH264 *decoder)
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clear_references(decoder, priv->long_ref, &priv->long_ref_count );
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clear_references(decoder, priv->dpb, &priv->dpb_count );
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if (priv->sub_buffer) {
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gst_buffer_unref(priv->sub_buffer);
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priv->sub_buffer = NULL;
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}
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if (priv->parser) {
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gst_h264_nal_parser_free(priv->parser);
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priv->parser = NULL;
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@ -2210,6 +2204,15 @@ error:
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return status;
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}
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static inline gint
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scan_for_start_code(GstAdapter *adapter, guint ofs, guint size, guint32 *scp)
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{
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return (gint)gst_adapter_masked_scan_uint32_peek(adapter,
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0xffffff00, 0x00000100,
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ofs, size,
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scp);
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}
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static GstVaapiDecoderStatus
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decode_buffer(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
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{
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@ -2217,55 +2220,80 @@ decode_buffer(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
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GstVaapiDecoderStatus status;
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GstH264ParserResult result;
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GstH264NalUnit nalu;
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guchar *buf;
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guint buf_size, ofs;
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const guchar *buf;
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guint i, buf_size, nalu_size, size;
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guint32 start_code;
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gint ofs;
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buf = GST_BUFFER_DATA(buffer);
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buf_size = GST_BUFFER_SIZE(buffer);
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if (!buf && buf_size == 0)
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return decode_sequence_end(decoder);
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gst_buffer_ref(buffer);
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gst_adapter_push(priv->adapter, buffer);
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gst_adapter_push(priv->adapter, gst_buffer_ref(buffer));
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if (priv->sub_buffer) {
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buffer = gst_buffer_merge(priv->sub_buffer, buffer);
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if (!buffer)
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return GST_VAAPI_DECODER_STATUS_ERROR_ALLOCATION_FAILED;
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gst_buffer_unref(priv->sub_buffer);
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priv->sub_buffer = NULL;
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}
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buf = GST_BUFFER_DATA(buffer);
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buf_size = GST_BUFFER_SIZE(buffer);
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ofs = 0;
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size = gst_adapter_available(priv->adapter);
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do {
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status = gst_vaapi_decoder_check_status(GST_VAAPI_DECODER(decoder));
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if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
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break;
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status = GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA;
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if (priv->is_avc) {
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if (size < priv->nal_length_size)
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break;
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buf = gst_adapter_peek(priv->adapter, priv->nal_length_size);
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nalu_size = 0;
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for (i = 0; i < priv->nal_length_size; i++)
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nalu_size = (nalu_size << 8) | buf[i];
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buf_size = priv->nal_length_size + nalu_size;
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if (size < buf_size)
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break;
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buffer = gst_adapter_take_buffer(priv->adapter, buf_size);
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size -= buf_size;
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buf = GST_BUFFER_DATA(buffer);
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buf_size = GST_BUFFER_SIZE(buffer);
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result = gst_h264_parser_identify_nalu_avc(
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priv->parser,
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buf, ofs, buf_size, priv->nal_length_size,
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buf, 0, buf_size, priv->nal_length_size,
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&nalu
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);
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}
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else {
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result = gst_h264_parser_identify_nalu(
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if (size < 8)
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break;
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ofs = scan_for_start_code(priv->adapter, 0, size, &start_code);
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if (ofs < 0)
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break;
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gst_adapter_flush(priv->adapter, ofs);
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size -= ofs;
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if (size < 8)
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break;
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ofs = scan_for_start_code(priv->adapter, 4, size - 4, NULL);
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if (ofs < 0)
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break;
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buffer = gst_adapter_take_buffer(priv->adapter, ofs);
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size -= ofs;
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buf = GST_BUFFER_DATA(buffer);
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buf_size = GST_BUFFER_SIZE(buffer);
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result = gst_h264_parser_identify_nalu_unchecked(
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priv->parser,
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buf, ofs, buf_size,
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buf, 0, buf_size,
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&nalu
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);
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}
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status = get_status(result);
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if (status == GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA) {
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priv->sub_buffer = gst_buffer_create_sub(buffer, ofs, buf_size - ofs);
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if (status != GST_VAAPI_DECODER_STATUS_SUCCESS) {
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gst_buffer_unref(buffer);
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break;
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}
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if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
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break;
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ofs = nalu.offset - ofs;
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if (gst_adapter_available(priv->adapter) >= ofs)
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gst_adapter_flush(priv->adapter, ofs);
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switch (nalu.type) {
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case GST_H264_NAL_SLICE_IDR:
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@ -2298,11 +2326,8 @@ decode_buffer(GstVaapiDecoderH264 *decoder, GstBuffer *buffer)
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status = GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
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break;
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}
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if (gst_adapter_available(priv->adapter) >= nalu.size)
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gst_adapter_flush(priv->adapter, nalu.size);
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ofs = nalu.offset + nalu.size;
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} while (status == GST_VAAPI_DECODER_STATUS_SUCCESS && ofs < buf_size);
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gst_buffer_unref(buffer);
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} while (status == GST_VAAPI_DECODER_STATUS_SUCCESS);
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return status;
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}
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@ -2462,7 +2487,6 @@ gst_vaapi_decoder_h264_init(GstVaapiDecoderH264 *decoder)
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priv->mb_width = 0;
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priv->mb_height = 0;
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priv->adapter = NULL;
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priv->sub_buffer = NULL;
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priv->field_poc[0] = 0;
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priv->field_poc[1] = 0;
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priv->poc_msb = 0;
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