gstreamer/subprojects/gst-omx/omx/gstomxh264dec.c

216 lines
6.8 KiB
C

/*
* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include "gstomxh264dec.h"
#include "gstomxh264utils.h"
GST_DEBUG_CATEGORY_STATIC (gst_omx_h264_dec_debug_category);
#define GST_CAT_DEFAULT gst_omx_h264_dec_debug_category
/* prototypes */
static gboolean gst_omx_h264_dec_is_format_change (GstOMXVideoDec * dec,
GstOMXPort * port, GstVideoCodecState * state);
static gboolean gst_omx_h264_dec_set_format (GstOMXVideoDec * dec,
GstOMXPort * port, GstVideoCodecState * state);
enum
{
PROP_0
};
/* class initialization */
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_omx_h264_dec_debug_category, "omxh264dec", 0, \
"debug category for gst-omx video decoder base class");
G_DEFINE_TYPE_WITH_CODE (GstOMXH264Dec, gst_omx_h264_dec,
GST_TYPE_OMX_VIDEO_DEC, DEBUG_INIT);
#define MAKE_CAPS(alignment) \
"video/x-h264, " \
"alignment=(string) " alignment ", " \
"stream-format=(string) byte-stream, " \
"width=(int) [1,MAX], height=(int) [1,MAX]"
/* The Zynq supports decoding subframes, though we want "au" to be the
* default, so we keep it prepended. This is the only way that it works with
* rtph264depay. */
#ifdef USE_OMX_TARGET_ZYNQ_USCALE_PLUS
#define SINK_CAPS MAKE_CAPS ("au") ";" MAKE_CAPS ("nal")
#else
#define SINK_CAPS MAKE_CAPS ("au")
#endif
static void
gst_omx_h264_dec_class_init (GstOMXH264DecClass * klass)
{
GstOMXVideoDecClass *videodec_class = GST_OMX_VIDEO_DEC_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
videodec_class->is_format_change =
GST_DEBUG_FUNCPTR (gst_omx_h264_dec_is_format_change);
videodec_class->set_format = GST_DEBUG_FUNCPTR (gst_omx_h264_dec_set_format);
videodec_class->cdata.default_sink_template_caps = SINK_CAPS;
gst_element_class_set_static_metadata (element_class,
"OpenMAX H.264 Video Decoder",
"Codec/Decoder/Video/Hardware",
"Decode H.264 video streams",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
gst_omx_set_default_role (&videodec_class->cdata, "video_decoder.avc");
}
static void
gst_omx_h264_dec_init (GstOMXH264Dec * self)
{
}
static gboolean
gst_omx_h264_dec_is_format_change (GstOMXVideoDec * dec,
GstOMXPort * port, GstVideoCodecState * state)
{
GstCaps *old_caps = NULL;
GstCaps *new_caps = state->caps;
GstStructure *old_structure, *new_structure;
const gchar *old_profile, *old_level, *old_alignment, *new_profile,
*new_level, *new_alignment;
if (dec->input_state) {
old_caps = dec->input_state->caps;
}
if (!old_caps) {
return FALSE;
}
old_structure = gst_caps_get_structure (old_caps, 0);
new_structure = gst_caps_get_structure (new_caps, 0);
old_profile = gst_structure_get_string (old_structure, "profile");
old_level = gst_structure_get_string (old_structure, "level");
old_alignment = gst_structure_get_string (old_structure, "alignment");
new_profile = gst_structure_get_string (new_structure, "profile");
new_level = gst_structure_get_string (new_structure, "level");
new_alignment = gst_structure_get_string (new_structure, "alignment");
if (g_strcmp0 (old_profile, new_profile) != 0
|| g_strcmp0 (old_level, new_level) != 0
|| g_strcmp0 (old_alignment, new_alignment) != 0) {
return TRUE;
}
return FALSE;
}
static gboolean
set_profile_and_level (GstOMXH264Dec * self, GstVideoCodecState * state)
{
OMX_ERRORTYPE err;
OMX_VIDEO_PARAM_PROFILELEVELTYPE param;
const gchar *profile_string, *level_string;
GstStructure *s;
GST_OMX_INIT_STRUCT (&param);
param.nPortIndex = GST_OMX_VIDEO_DEC (self)->dec_in_port->index;
/* Pass profile and level to the decoder if we have both info from the
* caps. */
s = gst_caps_get_structure (state->caps, 0);
profile_string = gst_structure_get_string (s, "profile");
if (!profile_string)
return TRUE;
param.eProfile = gst_omx_h264_utils_get_profile_from_str (profile_string);
if (param.eProfile == OMX_VIDEO_AVCProfileMax)
goto unsupported_profile;
level_string = gst_structure_get_string (s, "level");
if (!level_string)
return TRUE;
param.eLevel = gst_omx_h264_utils_get_level_from_str (level_string);
if (param.eLevel == OMX_VIDEO_AVCLevelMax)
goto unsupported_level;
GST_DEBUG_OBJECT (self, "Set profile (%s) and level (%s) on decoder",
profile_string, level_string);
err =
gst_omx_component_set_parameter (GST_OMX_VIDEO_DEC (self)->dec,
OMX_IndexParamVideoProfileLevelCurrent, &param);
if (err == OMX_ErrorUnsupportedIndex) {
GST_WARNING_OBJECT (self,
"Setting profile/level not supported by component");
} else if (err != OMX_ErrorNone) {
GST_ERROR_OBJECT (self,
"Error setting profile %u and level %u: %s (0x%08x)",
(guint) param.eProfile, (guint) param.eLevel,
gst_omx_error_to_string (err), err);
return FALSE;
}
return TRUE;
unsupported_profile:
GST_ERROR_OBJECT (self, "Unsupported profile %s", profile_string);
return FALSE;
unsupported_level:
GST_ERROR_OBJECT (self, "Unsupported level %s", level_string);
return FALSE;
}
static gboolean
gst_omx_h264_dec_set_format (GstOMXVideoDec * dec, GstOMXPort * port,
GstVideoCodecState * state)
{
GstOMXVideoDecClass *klass = GST_OMX_VIDEO_DEC_GET_CLASS (dec);
OMX_PARAM_PORTDEFINITIONTYPE port_def;
OMX_ERRORTYPE err;
const GstStructure *s;
gst_omx_port_get_port_definition (port, &port_def);
port_def.format.video.eCompressionFormat = OMX_VIDEO_CodingAVC;
err = gst_omx_port_update_port_definition (port, &port_def);
if (err != OMX_ErrorNone)
return FALSE;
if (klass->cdata.hacks & GST_OMX_HACK_PASS_PROFILE_TO_DECODER) {
if (!set_profile_and_level (GST_OMX_H264_DEC (dec), state))
return FALSE;
}
/* Enable subframe mode if NAL aligned */
s = gst_caps_get_structure (state->caps, 0);
if (!g_strcmp0 (gst_structure_get_string (s, "alignment"), "nal")
&& gst_omx_port_set_subframe (dec->dec_in_port, TRUE)) {
gst_video_decoder_set_subframe_mode (GST_VIDEO_DECODER (dec), TRUE);
}
return TRUE;
}