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White space for forcing carriage return in a paragraph
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@JeromeMartinez
JeromeMartinez committed Jan 5, 2018
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Expand Up @@ -721,14 +721,14 @@ ConfigurationRecord( NumBytes ) { |

### reserved_for_future_use

`reserved_for_future_use` has semantics that are reserved for future use.
Encoders conforming to this version of this specification SHALL NOT write this value.
`reserved_for_future_use` has semantics that are reserved for future use.
Encoders conforming to this version of this specification SHALL NOT write this value.
Decoders conforming to this version of this specification SHALL ignore its value.

### configuration_record_crc_parity

`configuration_record_crc_parity` 32 bits that are chosen so that the `Configuration Record` as a whole has a crc remainder of 0.
This is equivalent to storing the crc remainder in the 32-bit parity.
`configuration_record_crc_parity` 32 bits that are chosen so that the `Configuration Record` as a whole has a crc remainder of 0.
This is equivalent to storing the crc remainder in the 32-bit parity.
The CRC generator polynomial used is the standard IEEE CRC polynomial (0x104C11DB7) with initial value 0.

### Mapping FFV1 into Containers
Expand All @@ -737,7 +737,7 @@ This `Configuration Record` can be placed in any file format supporting `Configu

#### AVI File Format

The `Configuration Record` extends the stream format chunk ("AVI ", "hdlr", "strl", "strf") with the ConfigurationRecord bitstream.
The `Configuration Record` extends the stream format chunk ("AVI ", "hdlr", "strl", "strf") with the ConfigurationRecord bitstream.
See [@AVI] for more information about chunks.

`NumBytes` is defined as the size, in bytes, of the strf chunk indicated in the chunk header minus the size of the stream format structure.
Expand Down Expand Up @@ -820,22 +820,22 @@ SliceHeader( ) { |
### slice_x
`slice_x` indicates the x position on the slice raster formed by num_h_slices.
`slice_x` indicates the x position on the slice raster formed by num_h_slices.
Inferred to be 0 if not present.
### slice_y
`slice_y` indicates the y position on the slice raster formed by num_v_slices.
`slice_y` indicates the y position on the slice raster formed by num_v_slices.
Inferred to be 0 if not present.
### slice_width
`slice_width` indicates the width on the slice raster formed by num_h_slices.
`slice_width` indicates the width on the slice raster formed by num_h_slices.
Inferred to be 1 if not present.
### slice_height
`slice_height` indicates the height on the slice raster formed by num_v_slices.
`slice_height` indicates the height on the slice raster formed by num_v_slices.
Inferred to be 1 if not present.
### quant_table_set_index_count
Expand All @@ -844,12 +844,12 @@ Inferred to be 1 if not present.
### quant_table_set_index
`quant_table_set_index` indicates the Quantization Table Set index to select the Quantization Table Set and the initial states for the slice.
`quant_table_set_index` indicates the Quantization Table Set index to select the Quantization Table Set and the initial states for the slice.
Inferred to be 0 if not present.
### picture_structure
`picture_structure` specifies the temporal and spatial relationship of each line of the `Frame`.
`picture_structure` specifies the temporal and spatial relationship of each line of the `Frame`.
Inferred to be 0 if not present.
|value | picture structure used |
Expand All @@ -862,24 +862,24 @@ Inferred to be 0 if not present.
### sar_num
`sar_num` specifies the sample aspect ratio numerator.
Inferred to be 0 if not present.
`sar_num` specifies the sample aspect ratio numerator.
Inferred to be 0 if not present.
MUST be 0 if sample aspect ratio is unknown.
### sar_den
`sar_den` specifies the sample aspect ratio numerator.
Inferred to be 0 if not present.
`sar_den` specifies the sample aspect ratio numerator.
Inferred to be 0 if not present.
MUST be 0 if sample aspect ratio is unknown.
### reset_contexts
`reset_contexts` indicates if slice contexts must be reset.
`reset_contexts` indicates if slice contexts must be reset.
Inferred to be 0 if not present.
### slice_coding_mode
`slice_coding_mode` indicates the slice coding mode.
`slice_coding_mode` indicates the slice coding mode.
Inferred to be 0 if not present.
|value | slice coding mode |
Expand Down Expand Up @@ -912,20 +912,20 @@ SliceContent( ) { |

### plane_pixel_height

`plane_pixel_height[ p ]` is the height in pixels of plane p of the slice.
`plane_pixel_height[ 0 ]` and `plane_pixel_height[ 1 + ( chroma_planes ? 2 : 0 ) ]` value is `slice_pixel_height`.
`plane_pixel_height[ p ]` is the height in pixels of plane p of the slice.
`plane_pixel_height[ 0 ]` and `plane_pixel_height[ 1 + ( chroma_planes ? 2 : 0 ) ]` value is `slice_pixel_height`.
PDF:If `chroma_planes` is set to 1, `plane_pixel_height[ 1 ]` and `plane_pixel_height[ 2 ]` value is $\lceil slice\_pixel\_height / v\_chroma\_subsample \rceil$.
RFC:If `chroma_planes` is set to 1, `plane_pixel_height[ 1 ]` and `plane_pixel_height[ 2 ]` value is `ceil(slice_pixel_height / v_chroma_subsample)`.

### slice_pixel_height

`slice_pixel_height` is the height in pixels of the slice.
`slice_pixel_height` is the height in pixels of the slice.
PDF:Its value is $\lfloor ( slice\_y + slice\_height ) * slice\_pixel\_height / num\_v\_slices \rfloor - slice\_pixel\_y$.
RFC:Its value is `floor(( slice_y + slice_height ) * slice_pixel_height / num_v_slices) - slice_pixel_y`.

### slice_pixel_y

`slice_pixel_y` is the slice vertical position in pixels.
`slice_pixel_y` is the slice vertical position in pixels.
PDF:Its value is $\lfloor slice\_y * frame\_pixel\_height / num\_v\_slices \rfloor$.
RFC:Its value is `floor(slice_y * frame_pixel_height / num_v_slices)`.

Expand All @@ -947,20 +947,20 @@ Line( p, y ) { |
### plane_pixel_width
`plane_pixel_width[ p ]` is the width in pixels of plane p of the slice.
`plane_pixel_width[ 0 ]` and `plane_pixel_width[ 1 + ( chroma_planes ? 2 : 0 ) ]` value is `slice_pixel_width`.
`plane_pixel_width[ p ]` is the width in pixels of plane p of the slice.
`plane_pixel_width[ 0 ]` and `plane_pixel_width[ 1 + ( chroma_planes ? 2 : 0 ) ]` value is `slice_pixel_width`.
PDF:If `chroma_planes` is set to 1, `plane_pixel_width[ 1 ]` and `plane_pixel_width[ 2 ]` value is $\lceil slice\_pixel\_width / v\_chroma\_subsample \rceil$.
RFC:If `chroma_planes` is set to 1, `plane_pixel_width[ 1 ]` and `plane_pixel_width[ 2 ]` value is `ceil(slice_pixel_width / v_chroma_subsample)`.
### slice_pixel_width
`slice_pixel_width` is the width in pixels of the slice.
`slice_pixel_width` is the width in pixels of the slice.
PDF:Its value is $\lfloor ( slice\_x + slice\_width ) * slice\_pixel\_width / num\_h\_slices \rfloor - slice\_pixel\_x$.
RFC:Its value is `floor(( slice_x + slice_width ) * slice_pixel_width / num_h_slices) - slice_pixel_x`.
### slice_pixel_x
`slice_pixel_x` is the slice horizontal position in pixels.
`slice_pixel_x` is the slice horizontal position in pixels.
PDF:Its value is $\lfloor slice\_x * frame\_pixel\_width / num\_h\_slices \rfloor$.
RFC:Its value is `floor(slice_x * frame_pixel_width / num_h_slices)`.
Expand All @@ -982,7 +982,7 @@ SliceFooter( ) { |

### slice_size

`slice_size` indicates the size of the slice in bytes.
`slice_size` indicates the size of the slice in bytes.
Note: this allows finding the start of slices before previous slices have been fully decoded. And allows this way parallel decoding as well as error resilience.

### error_status
Expand All @@ -998,8 +998,8 @@ Note: this allows finding the start of slices before previous slices have been f

### slice_crc_parity

`slice_crc_parity` 32 bits that are chosen so that the slice as a whole has a crc remainder of 0.
This is equivalent to storing the crc remainder in the 32-bit parity.
`slice_crc_parity` 32 bits that are chosen so that the slice as a whole has a crc remainder of 0.
This is equivalent to storing the crc remainder in the 32-bit parity.
The CRC generator polynomial used is the standard IEEE CRC polynomial (0x104C11DB7) with initial value 0.

## Parameters
Expand Down Expand Up @@ -1045,9 +1045,9 @@ Parameters( ) { |
### version
`version` specifies the version of the FFV1 bitstream.
Each version is incompatible with others versions: decoders SHOULD reject a file due to unknown version.
Decoders SHOULD reject a file with version <= 1 && ConfigurationRecordIsPresent == 1.
`version` specifies the version of the FFV1 bitstream.
Each version is incompatible with others versions: decoders SHOULD reject a file due to unknown version.
Decoders SHOULD reject a file with version <= 1 && ConfigurationRecordIsPresent == 1.
Decoders SHOULD reject a file with version >= 3 && ConfigurationRecordIsPresent == 0.
|value | version |
Expand All @@ -1062,7 +1062,7 @@ Decoders SHOULD reject a file with version >= 3 && ConfigurationRecordIsPresent
### micro_version
`micro_version` specifies the micro-version of the FFV1 bitstream.
`micro_version` specifies the micro-version of the FFV1 bitstream.
After a version is considered stable (a micro-version value is assigned to be the first stable variant of a specific version), each new micro-version after this first stable variant is compatible with the previous micro-version: decoders SHOULD NOT reject a file due to an unknown micro-version equal or above the micro-version considered as stable.
Meaning of micro_version for version 3:
Expand Down Expand Up @@ -1098,7 +1098,7 @@ Meaning of micro_version for version 4 (note: at the time of writing of this spe
### state_transition_delta
`state_transition_delta` specifies the Range coder custom state transition table.
`state_transition_delta` specifies the Range coder custom state transition table.
If state_transition_delta is not present in the FFV1 bitstream, all Range coder custom state transition table elements are assumed to be 0.
### colorspace_type
Expand Down Expand Up @@ -1134,18 +1134,17 @@ Decoders SHOULD accept and interpret bits_per_raw_sample = 0 as 8.
### h_chroma_subsample
PDF:`h_chroma_subsample` indicates the subsample factor between luma and chroma width ($chroma\_width=2^{-log2\_h\_chroma\_subsample}luma\_width$).
PDF:`h_chroma_subsample` indicates the subsample factor between luma and chroma width ($chroma\_width=2^{-log2\_h\_chroma\_subsample}luma\_width$).
RFC:`h_chroma_subsample` indicates the subsample factor between luma and chroma width (`chroma_width = 2^(-log2_h_chroma_subsample) * luma_width`).
### v_chroma_subsample
PDF:`v_chroma_subsample` indicates the subsample factor between luma and chroma height ($chroma\_height=2^{-log2\_v\_chroma\_subsample}luma\_height$).
PDF:`v_chroma_subsample` indicates the subsample factor between luma and chroma height ($chroma\_height=2^{-log2\_v\_chroma\_subsample}luma\_height$).
RFC:`v_chroma_subsample` indicates the subsample factor between luma and chroma height (`chroma_height=2^(-log2_v_chroma_subsample) * luma_height`).
### alpha_plane
`alpha_plane`
: indicates if a transparency plane is present.
`alpha_plane` indicates if a transparency plane is present.
|value | color space used |
|-------|:---------------------------------|
Expand All @@ -1154,23 +1153,23 @@ RFC:`v_chroma_subsample` indicates the subsample factor between luma and chroma
### num_h_slices
`num_h_slices` indicates the number of horizontal elements of the slice raster.
`num_h_slices` indicates the number of horizontal elements of the slice raster.
Inferred to be 1 if not present.
### num_v_slices
`num_v_slices` indicates the number of vertical elements of the slice raster.
`num_v_slices` indicates the number of vertical elements of the slice raster.
Inferred to be 1 if not present.
### quant_table_set_count
`quant_table_set_count` indicates the number of Quantization Table Sets.
Inferred to be 1 if not present.
`quant_table_set_count` indicates the number of Quantization Table Sets.
Inferred to be 1 if not present.
MUST NOT be 0.
### states_coded
`states_coded` indicates if the respective Quantization Table Set has the initial states coded.
`states_coded` indicates if the respective Quantization Table Set has the initial states coded.
Inferred to be 0 if not present.
| value | initial states |
Expand All @@ -1180,8 +1179,8 @@ Inferred to be 0 if not present.
### initial_state_delta
`initial_state_delta` [ i ][ j ][ k ] indicates the initial Range coder state, it is encoded using k as context index and
pred = j ? initial\_states[ i ][j - 1][ k ] : 128
`initial_state_delta` [ i ][ j ][ k ] indicates the initial Range coder state, it is encoded using k as context index and
pred = j ? initial\_states[ i ][j - 1][ k ] : 128
initial\_state[ i ][ j ][ k ] = ( pred + initial\_state\_delta[ i ][ j ][ k ] ) & 255
### ec
Expand All @@ -1196,8 +1195,8 @@ initial\_state[ i ][ j ][ k ] = ( pred + initial\_state\_delta[ i ][ j ][ k ] )
### intra
`intra` indicates the relationship between the instances of `Frame`.
Inferred to be 0 if not present.
`intra` indicates the relationship between the instances of `Frame`.
Inferred to be 0 if not present.
|value | relationship |
|-------|:-----------------------------------------------------------------|
Expand Down

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