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9a2ed78532
Add API to parse the Slice header. This also calculates the macroblock position as specified in 6.3.16. https://bugzilla.gnome.org/show_bug.cgi?id=664274 Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com> Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
552 lines
19 KiB
C
552 lines
19 KiB
C
/* Gstreamer
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* Copyright (C) <2011> Intel Corporation
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* Copyright (C) <2011> Collabora Ltd.
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* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.com>
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*
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* From bad/sys/vdpau/mpeg/mpegutil.c:
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* Copyright (C) <2007> Jan Schmidt <thaytan@mad.scientist.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MPEG_VIDEO_UTILS_H__
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#define __GST_MPEG_VIDEO_UTILS_H__
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#ifndef GST_USE_UNSTABLE_API
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#warning "The Mpeg video parsing library is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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G_BEGIN_DECLS
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/**
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* GstMpegVideoPacketTypeCode:
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* @GST_MPEG_VIDEO_PACKET_PICTURE: Picture packet starting code
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* @GST_MPEG_VIDEO_PACKET_SLICE_MIN: Slice min packet starting code
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* @GST_MPEG_VIDEO_PACKET_SLICE_MAX: Slice max packet starting code
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* @GST_MPEG_VIDEO_PACKET_USER_DATA: User data packet starting code
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* @GST_MPEG_VIDEO_PACKET_SEQUENCE : Sequence packet starting code
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* @GST_MPEG_VIDEO_PACKET_EXTENSION: Extension packet starting code
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* @GST_MPEG_VIDEO_PACKET_SEQUENCE_END: Sequence end packet code
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* @GST_MPEG_VIDEO_PACKET_GOP: Group of Picture packet starting code
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* @GST_MPEG_VIDEO_PACKET_NONE: None packet code
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*
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* Indicates the type of MPEG packet
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*/
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typedef enum {
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GST_MPEG_VIDEO_PACKET_PICTURE = 0x00,
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GST_MPEG_VIDEO_PACKET_SLICE_MIN = 0x01,
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GST_MPEG_VIDEO_PACKET_SLICE_MAX = 0xaf,
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GST_MPEG_VIDEO_PACKET_USER_DATA = 0xb2,
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GST_MPEG_VIDEO_PACKET_SEQUENCE = 0xb3,
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GST_MPEG_VIDEO_PACKET_EXTENSION = 0xb5,
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GST_MPEG_VIDEO_PACKET_SEQUENCE_END = 0xb7,
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GST_MPEG_VIDEO_PACKET_GOP = 0xb8,
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GST_MPEG_VIDEO_PACKET_NONE = 0xff
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} GstMpegVideoPacketTypeCode;
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/**
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* GST_MPEG_VIDEO_PACKET_IS_SLICE:
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* @typecode: The MPEG video packet type code
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*
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* Checks whether a packet type code is a slice.
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*
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* Returns: %TRUE if the packet type code corresponds to a slice,
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* else %FALSE.
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*/
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#define GST_MPEG_VIDEO_PACKET_IS_SLICE(typecode) ((typecode) >= GST_MPEG_VIDEO_PACKET_SLICE_MIN && \
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(typecode) <= GST_MPEG_VIDEO_PACKET_SLICE_MAX)
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/**
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* GstMpegVideoPacketExtensionCode:
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* @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE: Sequence extension code
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* @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_DISPLAY: Sequence Display extension code
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* @GST_MPEG_VIDEO_PACKET_EXT_QUANT_MATRIX: Quantization Matrix extension code
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* @GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_SCALABLE: Sequence Scalable extension code
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* @GST_MPEG_VIDEO_PACKET_EXT_PICTURE: Picture coding extension
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*
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* Indicates what type of packets are in this block, some are mutually
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* exclusive though - ie, sequence packs are accumulated separately. GOP &
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* Picture may occur together or separately.
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*/
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typedef enum {
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GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE = 0x01,
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GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_DISPLAY = 0x02,
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GST_MPEG_VIDEO_PACKET_EXT_QUANT_MATRIX = 0x03,
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GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_SCALABLE = 0x05,
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GST_MPEG_VIDEO_PACKET_EXT_PICTURE = 0x08
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} GstMpegVideoPacketExtensionCode;
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/**
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* GstMpegVideoSequenceScalableMode:
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* GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_DATA_PARTITIONING: Data partitioning
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* GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SPATIAL: Spatial Scalability
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* GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SNR: SNR Scalability
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* GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_TEMPORAL: Temporal Scalability
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*/
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typedef enum {
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GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_DATA_PARTITIONING = 0x00,
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GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SPATIAL = 0x01,
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GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_SNR = 0x02,
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GST_MPEG_VIDEO_SEQ_SCALABLE_MODE_TEMPORAL = 0x03
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} GstMpegVideoSequenceScalableMode;
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/**
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* GstMpegVideoLevel:
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* @GST_MPEG_VIDEO_LEVEL_LOW: Low level (LL)
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* @GST_MPEG_VIDEO_LEVEL_MAIN: Main level (ML)
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* @GST_MPEG_VIDEO_LEVEL_HIGH_1440: High 1440 level (H-14)
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* @GST_MPEG_VIDEO_LEVEL_HIGH: High level (HL)
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*
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* Mpeg-2 Levels.
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**/
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typedef enum {
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GST_MPEG_VIDEO_LEVEL_HIGH = 0x04,
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GST_MPEG_VIDEO_LEVEL_HIGH_1440 = 0x06,
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GST_MPEG_VIDEO_LEVEL_MAIN = 0x08,
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GST_MPEG_VIDEO_LEVEL_LOW = 0x0a
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} GstMpegVideoLevel;
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/**
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* GstMpegVideoProfile:
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* @GST_MPEG_VIDEO_PROFILE_422: 4:2:2 profile (422)
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* @GST_MPEG_VIDEO_PROFILE_HIGH: High profile (HP)
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* @GST_MPEG_VIDEO_PROFILE_SPATIALLY_SCALABLE: Spatially Scalable profile (Spatial)
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* @GST_MPEG_VIDEO_PROFILE_SNR_SCALABLE: SNR Scalable profile (SNR)
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* @GST_MPEG_VIDEO_PROFILE_MAIN: Main profile (MP)
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* @GST_MPEG_VIDEO_PROFILE_SIMPLE: Simple profile (SP)
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*
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* Mpeg-2 Profiles.
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**/
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typedef enum {
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GST_MPEG_VIDEO_PROFILE_422 = 0x00,
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GST_MPEG_VIDEO_PROFILE_HIGH = 0x01,
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GST_MPEG_VIDEO_PROFILE_SPATIALLY_SCALABLE = 0x02,
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GST_MPEG_VIDEO_PROFILE_SNR_SCALABLE = 0x03,
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GST_MPEG_VIDEO_PROFILE_MAIN = 0x04,
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GST_MPEG_VIDEO_PROFILE_SIMPLE = 0x05
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} GstMpegVideoProfile;
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/**
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* GstMpegVideoChromaFormat:
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* @GST_MPEG_VIDEO_CHROMA_RES: Invalid (reserved for future use)
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* @GST_MPEG_VIDEO_CHROMA_420: 4:2:0 subsampling
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* @GST_MPEG_VIDEO_CHROMA_422: 4:2:2 subsampling
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* @GST_MPEG_VIDEO_CHROMA_444: 4:4:4 (non-subsampled)
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*
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* Chroma subsampling type.
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*/
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typedef enum {
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GST_MPEG_VIDEO_CHROMA_RES = 0x00,
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GST_MPEG_VIDEO_CHROMA_420 = 0x01,
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GST_MPEG_VIDEO_CHROMA_422 = 0x02,
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GST_MPEG_VIDEO_CHROMA_444 = 0x03,
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} GstMpegVideoChromaFormat;
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/**
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* GstMpegVideoPictureType:
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* @GST_MPEG_VIDEO_PICTURE_TYPE_I: Intra-coded (I) frame
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* @GST_MPEG_VIDEO_PICTURE_TYPE_P: Predictive-codec (P) frame
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* @GST_MPEG_VIDEO_PICTURE_TYPE_B: Bidirectionally predictive-coded (B) frame
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* @GST_MPEG_VIDEO_PICTURE_TYPE_D: D frame
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*
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* Picture type.
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*/
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typedef enum {
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GST_MPEG_VIDEO_PICTURE_TYPE_I = 0x01,
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GST_MPEG_VIDEO_PICTURE_TYPE_P = 0x02,
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GST_MPEG_VIDEO_PICTURE_TYPE_B = 0x03,
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GST_MPEG_VIDEO_PICTURE_TYPE_D = 0x04
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} GstMpegVideoPictureType;
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/**
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* GstMpegVideoPictureStructure:
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* @GST_MPEG_VIDEO_PICTURE_STRUCTURE_TOP_FIELD: Top field
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* @GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD: Bottom field
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* @GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME: Frame picture
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*
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* Picture structure type.
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*/
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typedef enum {
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GST_MPEG_VIDEO_PICTURE_STRUCTURE_TOP_FIELD = 0x01,
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GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD = 0x02,
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GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME = 0x03
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} GstMpegVideoPictureStructure;
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typedef struct _GstMpegVideoSequenceHdr GstMpegVideoSequenceHdr;
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typedef struct _GstMpegVideoSequenceExt GstMpegVideoSequenceExt;
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typedef struct _GstMpegVideoSequenceDisplayExt GstMpegVideoSequenceDisplayExt;
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typedef struct _GstMpegVideoSequenceScalableExt GstMpegVideoSequenceScalableExt;
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typedef struct _GstMpegVideoPictureHdr GstMpegVideoPictureHdr;
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typedef struct _GstMpegVideoGop GstMpegVideoGop;
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typedef struct _GstMpegVideoPictureExt GstMpegVideoPictureExt;
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typedef struct _GstMpegVideoQuantMatrixExt GstMpegVideoQuantMatrixExt;
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typedef struct _GstMpegVideoSliceHdr GstMpegVideoSliceHdr;
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typedef struct _GstMpegVideoPacket GstMpegVideoPacket;
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/**
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* GstMpegVideoSequenceHdr:
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* @width: Width of each frame
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* @height: Height of each frame
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* @par_w: Calculated Pixel Aspect Ratio width
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* @par_h: Calculated Pixel Aspect Ratio height
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* @fps_n: Calculated Framrate nominator
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* @fps_d: Calculated Framerate denominator
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* @bitrate_value: Value of the bitrate as is in the stream (400bps unit)
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* @bitrate: the real bitrate of the Mpeg video stream in bits per second, 0 if VBR stream
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* @constrained_parameters_flag: %TRUE if this stream uses contrained parameters.
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* @intra_quantizer_matrix: intra-quantization table, in zigzag scan order
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* @non_intra_quantizer_matrix: non-intra quantization table, in zigzag scan order
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*
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* The Mpeg2 Video Sequence Header structure.
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*/
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struct _GstMpegVideoSequenceHdr
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{
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guint16 width, height;
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guint8 aspect_ratio_info;
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guint8 frame_rate_code;
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guint32 bitrate_value;
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guint16 vbv_buffer_size_value;
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guint8 constrained_parameters_flag;
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guint8 intra_quantizer_matrix[64];
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guint8 non_intra_quantizer_matrix[64];
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/* Calculated values */
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guint par_w, par_h;
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guint fps_n, fps_d;
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guint bitrate;
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};
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/**
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* GstMpegVideoSequenceExt:
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* @profile: mpeg2 decoder profile
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* @level: mpeg2 decoder level
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* @progressive: %TRUE if the frames are progressive %FALSE otherwise
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* @chroma_format: indicates the chrominance format
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* @horiz_size_ext: Horizontal size
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* @vert_size_ext: Vertical size
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* @bitrate_ext: The bitrate
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* @vbv_buffer_size_extension: VBV vuffer size
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* @low_delay: %TRUE if the sequence doesn't contain any B-pictures, %FALSE
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* otherwise
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* @fps_n_ext: Framerate nominator code
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* @fps_d_ext: Framerate denominator code
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*
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* The Mpeg2 Video Sequence Extension structure.
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**/
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struct _GstMpegVideoSequenceExt
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{
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/* mpeg2 decoder profile */
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guint8 profile;
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/* mpeg2 decoder level */
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guint8 level;
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guint8 progressive;
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guint8 chroma_format;
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guint8 horiz_size_ext, vert_size_ext;
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guint16 bitrate_ext;
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guint8 vbv_buffer_size_extension;
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guint8 low_delay;
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guint8 fps_n_ext, fps_d_ext;
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};
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/**
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* GstMpegVideoSequenceDisplayExt:
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* @profile: mpeg2 decoder profil
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*/
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struct _GstMpegVideoSequenceDisplayExt
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{
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guint8 video_format;
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guint8 colour_description_flag;
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/* if colour_description_flag: */
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guint8 colour_primaries;
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guint8 transfer_characteristics;
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guint8 matrix_coefficients;
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guint16 display_horizontal_size;
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guint16 display_vertical_size;
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};
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/**
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* GstMpegVideoSequenceScalableExt:
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* @scalable_mode:
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* @layer_id:
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* @lower_layer_prediction_horizontal_size:
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* @lower_layer_prediction_vertical_size:
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* @horizontal_subsampling_factor_m:
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* @horizontal_subsampling_factor_n:
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* @vertical_subsampling_factor_m:
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* @vertical_subsampling_factor_n:
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* @picture_mux_enable:
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* @mux_to_progressive_sequence:
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* @picture_mux_order:
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* @picture_mux_factor:
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*
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* The Sequence Scalable Extension structure.
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*
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* Since: 1.2
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*/
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struct _GstMpegVideoSequenceScalableExt
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{
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guint8 scalable_mode;
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guint8 layer_id;
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/* if spatial scalability */
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guint16 lower_layer_prediction_horizontal_size;
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guint16 lower_layer_prediction_vertical_size;
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guint8 horizontal_subsampling_factor_m;
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guint8 horizontal_subsampling_factor_n;
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guint8 vertical_subsampling_factor_m;
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guint8 vertical_subsampling_factor_n;
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/* if temporal scalability */
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guint8 picture_mux_enable;
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guint8 mux_to_progressive_sequence;
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guint8 picture_mux_order;
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guint8 picture_mux_factor;
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};
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/**
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* GstMpegVideoQuantMatrixExt:
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* @load_intra_quantiser_matrix:
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* @intra_quantiser_matrix:
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* @load_non_intra_quantiser_matrix:
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* @non_intra_quantiser_matrix:
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* @load_chroma_intra_quantiser_matrix:
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* @chroma_intra_quantiser_matrix:
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* @load_chroma_non_intra_quantiser_matrix:
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* @chroma_non_intra_quantiser_matrix:
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*
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* The Quant Matrix Extension structure that exposes quantization
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* matrices in zigzag scan order. i.e. the original encoded scan
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* order.
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*/
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struct _GstMpegVideoQuantMatrixExt
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{
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guint8 load_intra_quantiser_matrix;
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guint8 intra_quantiser_matrix[64];
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guint8 load_non_intra_quantiser_matrix;
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guint8 non_intra_quantiser_matrix[64];
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guint8 load_chroma_intra_quantiser_matrix;
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guint8 chroma_intra_quantiser_matrix[64];
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guint8 load_chroma_non_intra_quantiser_matrix;
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guint8 chroma_non_intra_quantiser_matrix[64];
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};
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/**
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* GstMpegVideoPictureHdr:
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* @tsn: Temporal Sequence Number
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* @pic_type: Type of the frame
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* @full_pel_forward_vector: the full pel forward flag of
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* the frame: 0 or 1.
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* @full_pel_backward_vector: the full pel backward flag
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* of the frame: 0 or 1.
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* @f_code: F code
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*
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* The Mpeg2 Video Picture Header structure.
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*/
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struct _GstMpegVideoPictureHdr
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{
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guint16 tsn;
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guint8 pic_type;
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guint8 full_pel_forward_vector, full_pel_backward_vector;
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guint8 f_code[2][2];
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};
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/**
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* GstMpegVideoPictureExt:
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* @intra_dc_precision: Intra DC precision
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* @picture_structure: Structure of the picture
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* @top_field_first: Top field first
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* @frame_pred_frame_dct: Frame
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* @concealment_motion_vectors: Concealment Motion Vectors
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* @q_scale_type: Q Scale Type
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* @intra_vlc_format: Intra Vlc Format
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* @alternate_scan: Alternate Scan
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* @repeat_first_field: Repeat First Field
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* @chroma_420_type: Chroma 420 Type
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* @progressive_frame: %TRUE if the frame is progressive %FALSE otherwize
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*
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* The Mpeg2 Video Picture Extension structure.
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*/
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struct _GstMpegVideoPictureExt
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{
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guint8 f_code[2][2];
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guint8 intra_dc_precision;
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guint8 picture_structure;
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guint8 top_field_first;
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guint8 frame_pred_frame_dct;
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guint8 concealment_motion_vectors;
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guint8 q_scale_type;
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guint8 intra_vlc_format;
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guint8 alternate_scan;
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guint8 repeat_first_field;
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guint8 chroma_420_type;
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guint8 progressive_frame;
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guint8 composite_display;
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guint8 v_axis;
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guint8 field_sequence;
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guint8 sub_carrier;
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guint8 burst_amplitude;
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guint8 sub_carrier_phase;
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};
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/**
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* GstMpegVideoGop:
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* @drop_frame_flag: Drop Frame Flag
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* @hour: Hour (0-23)
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* @minute: Minute (O-59)
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* @second: Second (0-59)
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* @frame: Frame (0-59)
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* @closed_gop: Closed Gop
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* @broken_link: Broken link
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*
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* The Mpeg Video Group of Picture structure.
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*/
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struct _GstMpegVideoGop
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{
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guint8 drop_frame_flag;
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guint8 hour, minute, second, frame;
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guint8 closed_gop;
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guint8 broken_link;
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};
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/**
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* GstMpegVideoSliceHdr:
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* @slice_vertical_position_extension: Extension to slice_vertical_position
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* @priority_breakpoint: Point where the bitstream shall be partitioned
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* @quantiser_scale_code: Quantiser value (range: 1-31)
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* @intra_slice: Equal to one if all the macroblocks are intra macro blocks.
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* @slice_picture_id: Intended to aid recovery on severe bursts of
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* errors for certain types of applications
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|
*
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* The Mpeg2 Video Slice Header structure.
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*
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* Since: 1.2
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*/
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struct _GstMpegVideoSliceHdr
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|
{
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guint8 priority_breakpoint;
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guint8 quantiser_scale_code;
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|
guint8 intra_slice;
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|
guint8 slice_picture_id;
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|
|
|
/* Calculated values */
|
|
guint header_size; /* slice_header size in bits */
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gint mb_row; /* macroblock row */
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|
gint mb_column; /* macroblock column */
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|
};
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|
|
|
/**
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|
* GstMpegVideoTypeOffsetSize:
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|
* @type: the type of the packet that start at @offset
|
|
* @data: the data containing the packet starting at @offset
|
|
* @offset: the offset of the packet start in bytes, it is the exact, start of the packet, no sync code included
|
|
* @size: The size in bytes of the packet or -1 if the end wasn't found. It is the exact size of the packet, no sync code included
|
|
*
|
|
* A structure that contains the type of a packet, its offset and its size
|
|
*/
|
|
struct _GstMpegVideoPacket
|
|
{
|
|
const guint8 *data;
|
|
guint8 type;
|
|
guint offset;
|
|
gint size;
|
|
};
|
|
|
|
gboolean gst_mpeg_video_parse (GstMpegVideoPacket * packet,
|
|
const guint8 * data, gsize size, guint offset);
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|
|
|
gboolean gst_mpeg_video_packet_parse_sequence_header (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoSequenceHdr * seqhdr);
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|
|
|
gboolean gst_mpeg_video_packet_parse_sequence_extension (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoSequenceExt * seqext);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_sequence_display_extension (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoSequenceDisplayExt * seqdisplayext);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_sequence_scalable_extension (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoSequenceScalableExt * seqscaleext);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_picture_header (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoPictureHdr* pichdr);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_picture_extension (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoPictureExt *picext);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_gop (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoGop * gop);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_slice_header (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoSliceHdr * slice_hdr,
|
|
GstMpegVideoSequenceHdr * seq_hdr,
|
|
GstMpegVideoSequenceScalableExt * seqscaleext);
|
|
|
|
gboolean gst_mpeg_video_packet_parse_quant_matrix_extension (const GstMpegVideoPacket * packet,
|
|
GstMpegVideoQuantMatrixExt * quant);
|
|
|
|
/* seqext and displayext may be NULL if not received */
|
|
gboolean gst_mpeg_video_finalise_mpeg2_sequence_header (GstMpegVideoSequenceHdr *hdr,
|
|
GstMpegVideoSequenceExt *seqext, GstMpegVideoSequenceDisplayExt *displayext);
|
|
|
|
#ifndef GST_DISABLE_DEPRECATED
|
|
gboolean gst_mpeg_video_parse_picture_header (GstMpegVideoPictureHdr* hdr,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_picture_extension (GstMpegVideoPictureExt *ext,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_gop (GstMpegVideoGop * gop,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_sequence_header (GstMpegVideoSequenceHdr * seqhdr,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_sequence_extension (GstMpegVideoSequenceExt * seqext,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_sequence_display_extension (GstMpegVideoSequenceDisplayExt * seqdisplayext,
|
|
const guint8 * data, gsize size, guint offset);
|
|
|
|
gboolean gst_mpeg_video_parse_quant_matrix_extension (GstMpegVideoQuantMatrixExt * quant,
|
|
const guint8 * data, gsize size, guint offset);
|
|
#endif
|
|
|
|
void gst_mpeg_video_quant_matrix_get_raster_from_zigzag (guint8 out_quant[64],
|
|
const guint8 quant[64]);
|
|
|
|
void gst_mpeg_video_quant_matrix_get_zigzag_from_raster (guint8 out_quant[64],
|
|
const guint8 quant[64]);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif
|