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openh264dec: As we require NAL alignment from upstream we don't need to parse anything

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This commit is contained in:
Sebastian Dröge 2014-10-02 16:19:46 +03:00
parent 0a31814ef3
commit 1eb740a7c3
1 changed files with 13 additions and 62 deletions
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75
ext/openh264/gstopenh264dec.cpp
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@ -35,7 +35,6 @@
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <gst/codecparsers/gsth264parser.h>
#include <string.h> /* for memcpy */
@ -73,7 +72,6 @@ enum
struct _GstOpenh264DecPrivate
{
ISVCDecoder *decoder;
GstH264NalParser *nal_parser;
GstVideoCodecState *input_state;
guint width, height;
};
@ -83,7 +81,7 @@ struct _GstOpenh264DecPrivate
static GstStaticPadTemplate gst_openh264dec_sink_template = GST_STATIC_PAD_TEMPLATE("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS("video/x-h264, stream-format=(string)\"byte-stream\", alignment=(string)\"nal\""));
GST_STATIC_CAPS("video/x-h264, stream-format=(string)byte-stream, alignment=(string)nal"));
static GstStaticPadTemplate gst_openh264dec_src_template = GST_STATIC_PAD_TEMPLATE("src",
GST_PAD_SRC,
@ -127,7 +125,6 @@ static void gst_openh264dec_class_init(GstOpenh264DecClass *klass)
static void gst_openh264dec_init(GstOpenh264Dec *openh264dec)
{
openh264dec->priv = GST_OPENH264DEC_GET_PRIVATE(openh264dec);
openh264dec->priv->nal_parser = NULL;
openh264dec->priv->decoder = NULL;
gst_video_decoder_set_packetized(GST_VIDEO_DECODER(openh264dec), TRUE);
@ -166,7 +163,6 @@ static gboolean gst_openh264dec_start(GstVideoDecoder *decoder)
GstOpenh264Dec *openh264dec = GST_OPENH264DEC(decoder);
gint ret;
SDecodingParam dec_param = {0};
openh264dec->priv->nal_parser = gst_h264_nal_parser_new();
if (openh264dec->priv->decoder != NULL)
{
@ -193,11 +189,6 @@ static gboolean gst_openh264dec_stop(GstVideoDecoder *decoder)
GstOpenh264Dec *openh264dec = GST_OPENH264DEC(decoder);
gint ret = TRUE;
if (openh264dec->priv->nal_parser) {
gst_h264_nal_parser_free(openh264dec->priv->nal_parser);
openh264dec->priv->nal_parser = NULL;
}
if (openh264dec->priv->decoder) {
ret = openh264dec->priv->decoder->Uninitialize();
WelsDestroyDecoder(openh264dec->priv->decoder);
@ -243,10 +234,6 @@ static GstFlowReturn gst_openh264dec_handle_frame(GstVideoDecoder *decoder, GstV
GstMapInfo map_info;
GstVideoCodecState *state;
SBufferInfo dst_buf_info;
guint offset = 0;
GstH264ParserResult parser_result;
GstH264NalUnit nalu;
GstH264SPS sps;
DECODING_STATE ret;
guint8 *yuvdata[3];
GstFlowReturn flow_status;
@ -264,56 +251,20 @@ static GstFlowReturn gst_openh264dec_handle_frame(GstVideoDecoder *decoder, GstV
GST_LOG_OBJECT(openh264dec, "handle frame, %d", map_info.size > 4 ? map_info.data[4] & 0x1f : -1);
while (offset < map_info.size) {
memset (&dst_buf_info, 0, sizeof (SBufferInfo));
parser_result = gst_h264_parser_identify_nalu(openh264dec->priv->nal_parser,
map_info.data, offset, map_info.size, &nalu);
offset = nalu.offset + nalu.size;
memset (&dst_buf_info, 0, sizeof (SBufferInfo));
ret = openh264dec->priv->decoder->DecodeFrame2(map_info.data, map_info.size, yuvdata, &dst_buf_info);
if (parser_result != GST_H264_PARSER_OK && parser_result != GST_H264_PARSER_NO_NAL_END) {
GST_WARNING_OBJECT(openh264dec, "Failed to identify nalu, parser result: %u", parser_result);
break;
}
if (ret == dsNoParamSets) {
GST_DEBUG_OBJECT(openh264dec, "Requesting a key unit");
gst_pad_push_event(GST_VIDEO_DECODER_SINK_PAD(decoder),
gst_video_event_new_upstream_force_key_unit(GST_CLOCK_TIME_NONE, FALSE, 0));
}
memset (&dst_buf_info, 0, sizeof (SBufferInfo));
ret = openh264dec->priv->decoder->DecodeFrame2(nalu.data, nalu.size + 4, yuvdata, &dst_buf_info);
if (ret == dsNoParamSets) {
GST_DEBUG_OBJECT(openh264dec, "Requesting a key unit");
gst_pad_push_event(GST_VIDEO_DECODER_SINK_PAD(decoder),
gst_video_event_new_upstream_force_key_unit(GST_CLOCK_TIME_NONE, FALSE, 0));
}
if (ret != dsErrorFree && ret != dsNoParamSets) {
GST_DEBUG_OBJECT(openh264dec, "Requesting a key unit");
gst_pad_push_event(GST_VIDEO_DECODER_SINK_PAD(decoder),
gst_video_event_new_upstream_force_key_unit(GST_CLOCK_TIME_NONE, FALSE, 0));
GST_LOG_OBJECT(openh264dec, "error decoding nal, return code: %d", ret);
GST_LOG_OBJECT(openh264dec, "nal first byte: %u", (guint) nalu.data[0]);
GST_LOG_OBJECT(openh264dec, "nal size: %u", nalu.size);
}
if (nalu.type == GST_H264_NAL_SPS) {
parser_result = gst_h264_parser_parse_sps(openh264dec->priv->nal_parser, &nalu, &sps, TRUE);
if (parser_result == GST_H264_PARSER_OK) {
GST_DEBUG_OBJECT(openh264dec, "Got SPS, fps_n: %u fps_d: %u", sps.fps_num, sps.fps_den);
openh264dec->priv->input_state->info.fps_n = sps.fps_num ? sps.fps_num : 30;
openh264dec->priv->input_state->info.fps_d = sps.fps_num ? sps.fps_den : 1;
} else {
GST_WARNING_OBJECT(openh264dec, "Failed to parse SPS, parser result: %u", parser_result);
}
} else {
parser_result = gst_h264_parser_parse_nal(openh264dec->priv->nal_parser, &nalu);
if (parser_result == GST_H264_PARSER_OK) {
if (nalu.type == GST_H264_NAL_SLICE_IDR) {
GST_DEBUG_OBJECT(openh264dec, "Got an intra picture");
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT(frame);
}
} else {
GST_WARNING_OBJECT(openh264dec, "Failed to parse nal, parser result: %u", parser_result);
}
}
if (ret != dsErrorFree && ret != dsNoParamSets) {
GST_DEBUG_OBJECT(openh264dec, "Requesting a key unit");
gst_pad_push_event(GST_VIDEO_DECODER_SINK_PAD(decoder),
gst_video_event_new_upstream_force_key_unit(GST_CLOCK_TIME_NONE, FALSE, 0));
GST_LOG_OBJECT(openh264dec, "error decoding nal, return code: %d", ret);
}
gst_buffer_unmap(frame->input_buffer, &map_info);