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/*
* Copyright (c) 2014, Ericsson AB. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstopenh264dec.h"
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/gstvideodecoder.h>
#include <string.h> /* for memcpy */
GST_DEBUG_CATEGORY_STATIC (gst_openh264dec_debug_category);
#define GST_CAT_DEFAULT gst_openh264dec_debug_category
/* prototypes */
static gboolean gst_openh264dec_start (GstVideoDecoder * decoder);
static gboolean gst_openh264dec_stop (GstVideoDecoder * decoder);
static gboolean gst_openh264dec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state);
static gboolean gst_openh264dec_reset (GstVideoDecoder * decoder,
gboolean hard);
static GstFlowReturn gst_openh264dec_finish (GstVideoDecoder * decoder);
static GstFlowReturn gst_openh264dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static gboolean gst_openh264dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query);
/* pad templates */
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)au, "
"profile=(string){ constrained-baseline, baseline}"));
static GstStaticPadTemplate gst_openh264dec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")));
/* class initialization */
G_DEFINE_TYPE_WITH_CODE (GstOpenh264Dec, gst_openh264dec,
GST_TYPE_VIDEO_DECODER,
GST_DEBUG_CATEGORY_INIT (gst_openh264dec_debug_category, "openh264dec", 0,
"debug category for openh264dec element"));
static void
gst_openh264dec_class_init (GstOpenh264DecClass * klass)
{
GstVideoDecoderClass *video_decoder_class = GST_VIDEO_DECODER_CLASS (klass);
gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
&gst_openh264dec_sink_template);
gst_element_class_add_static_pad_template (GST_ELEMENT_CLASS (klass),
&gst_openh264dec_src_template);
gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
"OpenH264 video decoder", "Decoder/Video", "OpenH264 video decoder",
"Ericsson AB, http://www.ericsson.com");
video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_openh264dec_start);
video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_openh264dec_stop);
video_decoder_class->set_format =
GST_DEBUG_FUNCPTR (gst_openh264dec_set_format);
video_decoder_class->reset = GST_DEBUG_FUNCPTR (gst_openh264dec_reset);
video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_openh264dec_finish);
video_decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (gst_openh264dec_handle_frame);
video_decoder_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_openh264dec_decide_allocation);
}
static void
gst_openh264dec_init (GstOpenh264Dec * openh264dec)
{
openh264dec->decoder = NULL;
gst_video_decoder_set_packetized (GST_VIDEO_DECODER (openh264dec), TRUE);
gst_video_decoder_set_needs_format (GST_VIDEO_DECODER (openh264dec), TRUE);
}
static gboolean
gst_openh264dec_start (GstVideoDecoder * decoder)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
gint ret;
SDecodingParam dec_param = { 0 };
if (openh264dec->decoder != NULL) {
openh264dec->decoder->Uninitialize ();
WelsDestroyDecoder (openh264dec->decoder);
openh264dec->decoder = NULL;
}
WelsCreateDecoder (&(openh264dec->decoder));
dec_param.uiTargetDqLayer = 255;
dec_param.eEcActiveIdc = ERROR_CON_FRAME_COPY;
dec_param.eOutputColorFormat = videoFormatI420;
dec_param.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_AVC;
ret = openh264dec->decoder->Initialize (&dec_param);
GST_DEBUG_OBJECT (openh264dec,
"openh264_dec_start called, openh264dec %sinitialized OK!",
(ret != cmResultSuccess) ? "NOT " : "");
return (ret == cmResultSuccess);
}
static gboolean
gst_openh264dec_stop (GstVideoDecoder * decoder)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
if (openh264dec->decoder) {
openh264dec->decoder->Uninitialize ();
WelsDestroyDecoder (openh264dec->decoder);
openh264dec->decoder = NULL;
}
if (openh264dec->input_state) {
gst_video_codec_state_unref (openh264dec->input_state);
openh264dec->input_state = NULL;
}
openh264dec->width = openh264dec->height = 0;
return TRUE;
}
static gboolean
gst_openh264dec_set_format (GstVideoDecoder * decoder,
GstVideoCodecState * state)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
GST_DEBUG_OBJECT (openh264dec, "input caps: %" GST_PTR_FORMAT, state->caps);
if (openh264dec->input_state) {
gst_video_codec_state_unref (openh264dec->input_state);
openh264dec->input_state = NULL;
}
openh264dec->input_state = gst_video_codec_state_ref (state);
return TRUE;
}
static gboolean
gst_openh264dec_reset (GstVideoDecoder * decoder, gboolean hard)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
GST_DEBUG_OBJECT (openh264dec, "reset");
return TRUE;
}
static GstFlowReturn
gst_openh264dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
GstMapInfo map_info;
GstVideoCodecState *state;
SBufferInfo dst_buf_info;
DECODING_STATE ret;
guint8 *yuvdata[3];
GstFlowReturn flow_status;
GstVideoFrame video_frame;
guint actual_width, actual_height;
guint i;
guint8 *p;
guint row_stride, component_width, component_height, src_width, row;
if (frame) {
if (!gst_buffer_map (frame->input_buffer, &map_info, GST_MAP_READ)) {
GST_ERROR_OBJECT (openh264dec, "Cannot map input buffer!");
gst_video_codec_frame_unref (frame);
return GST_FLOW_ERROR;
}
GST_LOG_OBJECT (openh264dec, "handle frame, %d",
map_info.size > 4 ? map_info.data[4] & 0x1f : -1);
memset (&dst_buf_info, 0, sizeof (SBufferInfo));
ret =
openh264dec->decoder->DecodeFrame2 (map_info.data, map_info.size,
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_buffer_unmap (frame->input_buffer, &map_info);
gst_video_codec_frame_unref (frame);
frame = NULL;
} else {
memset (&dst_buf_info, 0, sizeof (SBufferInfo));
ret = openh264dec->decoder->DecodeFrame2 (NULL, 0, yuvdata, &dst_buf_info);
if (ret != dsErrorFree) {
gst_video_codec_frame_unref (frame);
return GST_FLOW_EOS;
}
}
/* FIXME: openh264 has no way for us to get a connection
* between the input and output frames, we just have to
* guess based on the input. Fortunately openh264 can
* only do baseline profile. */
frame = gst_video_decoder_get_oldest_frame (decoder);
if (!frame) {
/* Can only happen in finish() */
return GST_FLOW_EOS;
}
/* No output available yet */
if (dst_buf_info.iBufferStatus != 1) {
gst_video_codec_frame_unref (frame);
return (frame ? GST_FLOW_OK : GST_FLOW_EOS);
}
actual_width = dst_buf_info.UsrData.sSystemBuffer.iWidth;
actual_height = dst_buf_info.UsrData.sSystemBuffer.iHeight;
if (!gst_pad_has_current_caps (GST_VIDEO_DECODER_SRC_PAD (openh264dec))
|| actual_width != openh264dec->width
|| actual_height != openh264dec->height) {
state =
gst_video_decoder_set_output_state (decoder, GST_VIDEO_FORMAT_I420,
actual_width, actual_height, openh264dec->input_state);
openh264dec->width = actual_width;
openh264dec->height = actual_height;
if (!gst_video_decoder_negotiate (decoder)) {
GST_ERROR_OBJECT (openh264dec,
"Failed to negotiate with downstream elements");
gst_video_codec_state_unref (state);
gst_video_codec_frame_unref (frame);
return GST_FLOW_NOT_NEGOTIATED;
}
} else {
state = gst_video_decoder_get_output_state (decoder);
}
flow_status = gst_video_decoder_allocate_output_frame (decoder, frame);
if (flow_status != GST_FLOW_OK) {
gst_video_codec_state_unref (state);
gst_video_codec_frame_unref (frame);
return flow_status;
}
if (!gst_video_frame_map (&video_frame, &state->info, frame->output_buffer,
GST_MAP_WRITE)) {
GST_ERROR_OBJECT (openh264dec, "Cannot map output buffer!");
gst_video_codec_state_unref (state);
gst_video_codec_frame_unref (frame);
return GST_FLOW_ERROR;
}
for (i = 0; i < 3; i++) {
p = GST_VIDEO_FRAME_COMP_DATA (&video_frame, i);
row_stride = GST_VIDEO_FRAME_COMP_STRIDE (&video_frame, i);
component_width = GST_VIDEO_FRAME_COMP_WIDTH (&video_frame, i);
component_height = GST_VIDEO_FRAME_COMP_HEIGHT (&video_frame, i);
src_width =
i <
1 ? dst_buf_info.UsrData.sSystemBuffer.
iStride[0] : dst_buf_info.UsrData.sSystemBuffer.iStride[1];
for (row = 0; row < component_height; row++) {
memcpy (p, yuvdata[i], component_width);
p += row_stride;
yuvdata[i] += src_width;
}
}
gst_video_codec_state_unref (state);
gst_video_frame_unmap (&video_frame);
return gst_video_decoder_finish_frame (decoder, frame);
}
static GstFlowReturn
gst_openh264dec_finish (GstVideoDecoder * decoder)
{
GstOpenh264Dec *openh264dec = GST_OPENH264DEC (decoder);
GST_DEBUG_OBJECT (openh264dec, "finish");
/* Decoder not negotiated yet */
if (openh264dec->width == 0)
return GST_FLOW_OK;
/* Drain all pending frames */
while ((gst_openh264dec_handle_frame (decoder, NULL)) == GST_FLOW_OK);
return GST_FLOW_OK;
}
static gboolean
gst_openh264dec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query)
{
GstVideoCodecState *state;
GstBufferPool *pool;
guint size, min, max;
GstStructure *config;
if (!GST_VIDEO_DECODER_CLASS (gst_openh264dec_parent_class)->decide_allocation
(decoder, query))
return FALSE;
state = gst_video_decoder_get_output_state (decoder);
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
config = gst_buffer_pool_get_config (pool);
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
gst_object_unref (pool);
gst_video_codec_state_unref (state);
return TRUE;
}