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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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534 lines
16 KiB
C
534 lines
16 KiB
C
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/* GStreamer
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*
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* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/base/gstadapter.h>
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#include <gst/base/gstbitreader.h>
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#include <string.h>
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#include "../gstvdp/gstvdpvideosrcpad.h"
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#include "gstvdph264frame.h"
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#include "gstvdph264dec.h"
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GST_DEBUG_CATEGORY_STATIC (gst_vdp_h264_dec_debug);
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#define GST_CAT_DEFAULT gst_vdp_h264_dec_debug
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static GstStaticPadTemplate sink_template =
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GST_STATIC_PAD_TEMPLATE (GST_BASE_VIDEO_DECODER_SINK_NAME,
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-h264, " "parsed = (boolean) false")
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);
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#define DEBUG_INIT(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_vdp_h264_dec_debug, "vdpauh264dec", 0, \
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"VDPAU h264 decoder");
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GST_BOILERPLATE_FULL (GstVdpH264Dec, gst_vdp_h264_dec, GstBaseVideoDecoder,
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GST_TYPE_BASE_VIDEO_DECODER, DEBUG_INIT);
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#define SYNC_CODE_SIZE 3
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#define READ_UINT8(reader, val, nbits) { \
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if (!gst_bit_reader_get_bits_uint8 (reader, &val, nbits)) { \
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GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
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return FALSE; \
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} \
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}
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#define READ_UINT16(reader, val, nbits) { \
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if (!gst_bit_reader_get_bits_uint16 (reader, &val, nbits)) { \
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GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
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return FALSE; \
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} \
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}
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#define SKIP(reader, nbits) { \
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if (!gst_bit_reader_skip (reader, nbits)) { \
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GST_WARNING ("failed to skip nbits: %d", nbits); \
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return FALSE; \
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} \
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}
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static gboolean
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gst_vdp_h264_dec_set_sink_caps (GstBaseVideoDecoder * base_video_decoder,
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GstCaps * caps)
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{
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GstVdpH264Dec *h264_dec;
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GstStructure *structure;
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const GValue *value;
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h264_dec = GST_VDP_H264_DEC (base_video_decoder);
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structure = gst_caps_get_structure (caps, 0);
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/* packetized video has a codec_data */
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if ((value = gst_structure_get_value (structure, "codec_data"))) {
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GstBuffer *buf;
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GstBitReader reader;
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guint8 version;
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guint8 n_sps, n_pps;
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gint i;
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GST_DEBUG_OBJECT (h264_dec, "have packetized h264");
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h264_dec->packetized = TRUE;
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buf = gst_value_get_buffer (value);
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GST_MEMDUMP ("avcC:", GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
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/* parse the avcC data */
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if (GST_BUFFER_SIZE (buf) < 7) {
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GST_ERROR_OBJECT (h264_dec, "avcC size %u < 7", GST_BUFFER_SIZE (buf));
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return FALSE;
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}
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gst_bit_reader_init_from_buffer (&reader, buf);
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READ_UINT8 (&reader, version, 8);
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if (version != 1)
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return FALSE;
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SKIP (&reader, 30);
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READ_UINT8 (&reader, h264_dec->nal_length_size, 2);
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h264_dec->nal_length_size += 1;
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GST_DEBUG_OBJECT (h264_dec, "nal length %u", h264_dec->nal_length_size);
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SKIP (&reader, 3);
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READ_UINT8 (&reader, n_sps, 5);
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for (i = 0; i < n_sps; i++) {
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guint16 sps_length;
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guint8 *data;
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READ_UINT16 (&reader, sps_length, 16);
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sps_length -= 1;
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SKIP (&reader, 8);
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data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
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if (!gst_h264_parser_parse_sequence (h264_dec->parser, data, sps_length))
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return FALSE;
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SKIP (&reader, sps_length * 8);
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}
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READ_UINT8 (&reader, n_pps, 8);
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for (i = 0; i < n_pps; i++) {
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guint16 pps_length;
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guint8 *data;
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READ_UINT16 (&reader, pps_length, 16);
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pps_length -= 1;
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SKIP (&reader, 8);
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data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
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if (!gst_h264_parser_parse_picture (h264_dec->parser, data, pps_length))
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return FALSE;
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SKIP (&reader, pps_length * 8);
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}
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}
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return TRUE;
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}
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static GstFlowReturn
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gst_vdp_h264_dec_shape_output (GstBaseVideoDecoder * base_video_decoder,
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GstBuffer * buf)
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{
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GstVdpVideoSrcPad *vdp_pad;
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vdp_pad =
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(GstVdpVideoSrcPad *) GST_BASE_VIDEO_DECODER_SRC_PAD (base_video_decoder);
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return gst_vdp_video_src_pad_push (vdp_pad, GST_VDP_VIDEO_BUFFER (buf));
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}
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static GstFlowReturn
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gst_vdp_h264_dec_handle_frame (GstBaseVideoDecoder * base_video_decoder,
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GstVideoFrame * frame, GstClockTimeDiff deadline)
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{
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GstVdpH264Frame *h264_frame;
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GST_DEBUG ("handle_frame");
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h264_frame = (GstVdpH264Frame *) frame;
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GST_DEBUG ("frame_num: %d", h264_frame->slice_hdr.frame_num);
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GST_DEBUG ("pic_order_cnt_type: %d",
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h264_frame->slice_hdr.picture->sequence->pic_order_cnt_type);
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GST_DEBUG ("pic_order_cnt_lsb: %d", h264_frame->slice_hdr.pic_order_cnt_lsb);
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GST_DEBUG ("delta_pic_order_cnt_bottom: %d",
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h264_frame->slice_hdr.delta_pic_order_cnt_bottom);
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gst_base_video_decoder_skip_frame (base_video_decoder, frame);
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return GST_FLOW_OK;
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}
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static gint
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gst_vdp_h264_dec_scan_for_sync (GstBaseVideoDecoder * base_video_decoder,
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GstAdapter * adapter)
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{
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GstVdpH264Dec *h264_dec = GST_VDP_H264_DEC (base_video_decoder);
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gint m;
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if (h264_dec->packetized)
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return 0;
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m = gst_adapter_masked_scan_uint32 (adapter, 0xffffff00, 0x00000100,
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0, gst_adapter_available (adapter));
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if (m == -1)
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return gst_adapter_available (adapter) - SYNC_CODE_SIZE;
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return m;
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}
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static GstBaseVideoDecoderScanResult
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gst_vdp_h264_dec_scan_for_packet_end (GstBaseVideoDecoder * base_video_decoder,
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GstAdapter * adapter, guint * size, gboolean at_eos)
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{
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GstVdpH264Dec *h264_dec = GST_VDP_H264_DEC (base_video_decoder);
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guint avail;
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avail = gst_adapter_available (adapter);
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if (avail < h264_dec->nal_length_size)
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return GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA;
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if (h264_dec->packetized) {
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guint8 *data;
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gint i;
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guint32 nal_length;
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data = g_slice_alloc (h264_dec->nal_length_size);
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gst_adapter_copy (adapter, data, 0, h264_dec->nal_length_size);
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for (i = 0; i < h264_dec->nal_length_size; i++)
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nal_length = (nal_length << 8) | data[i];
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g_slice_free1 (h264_dec->nal_length_size, data);
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nal_length += h264_dec->nal_length_size;
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/* check for invalid NALU sizes, assume the size if the available bytes
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* when something is fishy */
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if (nal_length <= 1 || nal_length > avail) {
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nal_length = avail - h264_dec->nal_length_size;
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GST_DEBUG ("fixing invalid NALU size to %u", nal_length);
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}
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*size = nal_length;
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}
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else {
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guint8 *data;
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guint32 start_code;
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guint n;
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data = g_slice_alloc (SYNC_CODE_SIZE);
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gst_adapter_copy (adapter, data, 0, SYNC_CODE_SIZE);
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start_code = ((data[0] << 16) && (data[1] << 8) && data[2]);
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g_slice_free1 (SYNC_CODE_SIZE, data);
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GST_DEBUG ("start_code: %d", start_code);
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if (start_code == 0x000001)
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return GST_BASE_VIDEO_DECODER_SCAN_RESULT_LOST_SYNC;
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n = gst_adapter_masked_scan_uint32 (adapter, 0xffffff00, 0x00000100,
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SYNC_CODE_SIZE, avail - SYNC_CODE_SIZE);
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if (n == -1)
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return GST_BASE_VIDEO_DECODER_SCAN_RESULT_NEED_DATA;
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*size = n;
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}
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GST_DEBUG ("NAL size: %d", *size);
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return GST_BASE_VIDEO_DECODER_SCAN_RESULT_OK;
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}
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static GstFlowReturn
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gst_vdp_h264_dec_parse_data (GstBaseVideoDecoder * base_video_decoder,
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GstBuffer * buf, gboolean at_eos)
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{
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GstVdpH264Dec *h264_dec = GST_VDP_H264_DEC (base_video_decoder);
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GstBitReader reader;
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GstNalUnit nal_unit;
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guint8 forbidden_zero_bit;
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guint8 *data;
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guint size;
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gint i;
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GstVideoFrame *frame;
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GST_MEMDUMP ("data", GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
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gst_bit_reader_init_from_buffer (&reader, buf);
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/* skip nal_length or sync code */
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gst_bit_reader_skip (&reader, h264_dec->nal_length_size * 8);
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if (!gst_bit_reader_get_bits_uint8 (&reader, &forbidden_zero_bit, 1))
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goto invalid_packet;
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if (forbidden_zero_bit != 0) {
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GST_WARNING ("forbidden_zero_bit != 0");
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return GST_FLOW_ERROR;
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}
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if (!gst_bit_reader_get_bits_uint16 (&reader, &nal_unit.ref_idc, 2))
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goto invalid_packet;
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GST_DEBUG ("nal_ref_idc: %u", nal_unit.ref_idc);
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/* read nal_unit_type */
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if (!gst_bit_reader_get_bits_uint16 (&reader, &nal_unit.type, 5))
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goto invalid_packet;
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GST_DEBUG ("nal_unit_type: %u", nal_unit.type);
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if (nal_unit.type == 14 || nal_unit.type == 20) {
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if (!gst_bit_reader_skip (&reader, 24))
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goto invalid_packet;
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}
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data = GST_BUFFER_DATA (buf) + gst_bit_reader_get_pos (&reader) / 8;
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size = gst_bit_reader_get_remaining (&reader) / 8;
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i = size - 1;
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while (size >= 0 && data[i] == 0x00) {
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size--;
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i--;
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}
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frame = gst_base_video_decoder_get_current_frame (base_video_decoder);
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/* does this mark the beginning of a new access unit */
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if (nal_unit.type == GST_NAL_AU_DELIMITER)
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VDP_H264_FRAME_GOT_PRIMARY)) {
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if (nal_unit.type == GST_NAL_SPS || nal_unit.type == GST_NAL_PPS ||
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nal_unit.type == GST_NAL_SEI ||
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(nal_unit.type >= 14 && nal_unit.type <= 18))
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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}
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if (nal_unit.type >= GST_NAL_SLICE && nal_unit.type <= GST_NAL_SLICE_IDR) {
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GstH264Slice slice;
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if (!gst_h264_parser_parse_slice_header (h264_dec->parser, &slice, data,
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size, nal_unit))
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goto invalid_packet;
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if (slice.redundant_pic_cnt == 0) {
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if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VDP_H264_FRAME_GOT_PRIMARY)) {
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GstH264Slice *p_slice;
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guint8 pic_order_cnt_type, p_pic_order_cnt_type;
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p_slice = &(GST_VDP_H264_FRAME_CAST (frame)->slice_hdr);
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pic_order_cnt_type = slice.picture->sequence->pic_order_cnt_type;
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p_pic_order_cnt_type = p_slice->picture->sequence->pic_order_cnt_type;
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if (slice.frame_num != p_slice->frame_num)
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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else if (slice.picture != p_slice->picture)
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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else if (slice.bottom_field_flag != p_slice->bottom_field_flag)
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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else if (nal_unit.ref_idc != p_slice->nal_unit.ref_idc &&
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(nal_unit.ref_idc == 0 || p_slice->nal_unit.ref_idc == 0))
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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else if ((pic_order_cnt_type == 0 && p_pic_order_cnt_type == 0) &&
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(slice.pic_order_cnt_lsb != p_slice->pic_order_cnt_lsb ||
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slice.delta_pic_order_cnt_bottom !=
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p_slice->delta_pic_order_cnt_bottom))
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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else if ((p_pic_order_cnt_type == 1 && p_pic_order_cnt_type == 1) &&
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(slice.delta_pic_order_cnt[0] != p_slice->delta_pic_order_cnt[0] ||
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slice.delta_pic_order_cnt[1] !=
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p_slice->delta_pic_order_cnt[1]))
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gst_base_video_decoder_have_frame (base_video_decoder, &frame);
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}
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if (!GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VDP_H264_FRAME_GOT_PRIMARY)) {
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if (GST_H264_IS_I_SLICE (slice.type)
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|| GST_H264_IS_SI_SLICE (slice.type))
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GST_VIDEO_FRAME_FLAG_SET (frame, GST_VIDEO_FRAME_FLAG_KEYFRAME);
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GST_VDP_H264_FRAME_CAST (frame)->slice_hdr = slice;
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GST_VIDEO_FRAME_FLAG_SET (frame, GST_VDP_H264_FRAME_GOT_PRIMARY);
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}
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}
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|
gst_vdp_h264_frame_add_slice ((GstVdpH264Frame *) frame, buf);
|
||
|
}
|
||
|
|
||
|
if (nal_unit.type == GST_NAL_SPS) {
|
||
|
if (!gst_h264_parser_parse_sequence (h264_dec->parser, data, size))
|
||
|
goto invalid_packet;
|
||
|
}
|
||
|
|
||
|
if (nal_unit.type == GST_NAL_PPS) {
|
||
|
if (!gst_h264_parser_parse_picture (h264_dec->parser, data, size))
|
||
|
goto invalid_packet;
|
||
|
}
|
||
|
|
||
|
if (nal_unit.type == GST_NAL_SEI) {
|
||
|
GstH264Sequence *seq;
|
||
|
GstH264SEIMessage sei;
|
||
|
|
||
|
if (GST_VIDEO_FRAME_FLAG_IS_SET (frame, GST_VDP_H264_FRAME_GOT_PRIMARY))
|
||
|
seq = GST_VDP_H264_FRAME_CAST (frame)->slice_hdr.picture->sequence;
|
||
|
else
|
||
|
seq = NULL;
|
||
|
|
||
|
if (!gst_h264_parser_parse_sei_message (h264_dec->parser, seq, &sei, data,
|
||
|
size))
|
||
|
goto invalid_packet;
|
||
|
}
|
||
|
|
||
|
gst_buffer_unref (buf);
|
||
|
return GST_FLOW_OK;
|
||
|
|
||
|
invalid_packet:
|
||
|
GST_WARNING ("Invalid packet size!");
|
||
|
gst_buffer_unref (buf);
|
||
|
|
||
|
return GST_FLOW_OK;
|
||
|
}
|
||
|
|
||
|
static GstVideoFrame *
|
||
|
gst_vdp_h264_dec_create_frame (GstBaseVideoDecoder * base_video_decoder)
|
||
|
{
|
||
|
return GST_VIDEO_FRAME_CAST (gst_vdp_h264_frame_new ());
|
||
|
}
|
||
|
|
||
|
static GstPad *
|
||
|
gst_vdp_h264_dec_create_srcpad (GstBaseVideoDecoder * base_video_decoder,
|
||
|
GstBaseVideoDecoderClass * base_video_decoder_class)
|
||
|
{
|
||
|
GstPadTemplate *pad_template;
|
||
|
GstVdpVideoSrcPad *vdp_pad;
|
||
|
|
||
|
pad_template = gst_element_class_get_pad_template
|
||
|
(GST_ELEMENT_CLASS (base_video_decoder_class),
|
||
|
GST_BASE_VIDEO_DECODER_SRC_NAME);
|
||
|
|
||
|
vdp_pad = gst_vdp_video_src_pad_new (pad_template,
|
||
|
GST_BASE_VIDEO_DECODER_SRC_NAME);
|
||
|
|
||
|
return GST_PAD (vdp_pad);
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_vdp_h264_dec_flush (GstBaseVideoDecoder * base_video_decoder)
|
||
|
{
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_vdp_h264_dec_start (GstBaseVideoDecoder * base_video_decoder)
|
||
|
{
|
||
|
GstVdpH264Dec *h264_dec = GST_VDP_H264_DEC (base_video_decoder);
|
||
|
|
||
|
h264_dec->packetized = FALSE;
|
||
|
h264_dec->nal_length_size = SYNC_CODE_SIZE;
|
||
|
h264_dec->parser = g_object_new (GST_TYPE_H264_PARSER, NULL);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_vdp_h264_dec_stop (GstBaseVideoDecoder * base_video_decoder)
|
||
|
{
|
||
|
GstVdpH264Dec *h264_dec = GST_VDP_H264_DEC (base_video_decoder);
|
||
|
|
||
|
g_object_unref (h264_dec->parser);
|
||
|
|
||
|
return TRUE;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_vdp_h264_dec_base_init (gpointer g_class)
|
||
|
{
|
||
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
||
|
|
||
|
GstCaps *src_caps;
|
||
|
GstPadTemplate *src_template;
|
||
|
|
||
|
gst_element_class_set_details_simple (element_class,
|
||
|
"VDPAU H264 Decoder",
|
||
|
"Decoder",
|
||
|
"Decode h264 stream with vdpau",
|
||
|
"Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>");
|
||
|
|
||
|
gst_element_class_add_pad_template (element_class,
|
||
|
gst_static_pad_template_get (&sink_template));
|
||
|
|
||
|
src_caps = gst_vdp_video_buffer_get_caps (TRUE, VDP_CHROMA_TYPE_420);
|
||
|
src_template = gst_pad_template_new (GST_BASE_VIDEO_DECODER_SRC_NAME,
|
||
|
GST_PAD_SRC, GST_PAD_ALWAYS, src_caps);
|
||
|
|
||
|
gst_element_class_add_pad_template (element_class, src_template);
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_vdp_h264_dec_init (GstVdpH264Dec * h264_dec, GstVdpH264DecClass * klass)
|
||
|
{
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_vdp_h264_dec_finalize (GObject * object)
|
||
|
{
|
||
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
gst_vdp_h264_dec_class_init (GstVdpH264DecClass * klass)
|
||
|
{
|
||
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
||
|
GstBaseVideoDecoderClass *base_video_decoder_class =
|
||
|
GST_BASE_VIDEO_DECODER_CLASS (klass);
|
||
|
|
||
|
gobject_class->finalize = gst_vdp_h264_dec_finalize;
|
||
|
|
||
|
base_video_decoder_class->start = gst_vdp_h264_dec_start;
|
||
|
base_video_decoder_class->stop = gst_vdp_h264_dec_stop;
|
||
|
base_video_decoder_class->flush = gst_vdp_h264_dec_flush;
|
||
|
|
||
|
base_video_decoder_class->create_srcpad = gst_vdp_h264_dec_create_srcpad;
|
||
|
base_video_decoder_class->set_sink_caps = gst_vdp_h264_dec_set_sink_caps;
|
||
|
|
||
|
base_video_decoder_class->scan_for_sync = gst_vdp_h264_dec_scan_for_sync;
|
||
|
base_video_decoder_class->scan_for_packet_end =
|
||
|
gst_vdp_h264_dec_scan_for_packet_end;
|
||
|
base_video_decoder_class->parse_data = gst_vdp_h264_dec_parse_data;
|
||
|
|
||
|
base_video_decoder_class->handle_frame = gst_vdp_h264_dec_handle_frame;
|
||
|
base_video_decoder_class->create_frame = gst_vdp_h264_dec_create_frame;
|
||
|
|
||
|
base_video_decoder_class->shape_output = gst_vdp_h264_dec_shape_output;
|
||
|
}
|