mirror of
https://github.com/retroSoC/retroSoC.git
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maksyuki
39bc1c84b4
- Implemented tests for the deterministic baseline JPEG reference model in , covering encoding, decoding, quality scaling, and error handling. - Created to ensure synchronization between RTL and C register constants for JPEG. - Updated to reflect changes in the number of APB interfaces and IRQ mappings, ensuring the topology generates correct bindings.
100 lines
3.0 KiB
Python
100 lines
3.0 KiB
Python
"""Tests for the deterministic baseline JPEG reference model."""
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from __future__ import annotations
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import io
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import pytest
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from jpeg_reference import (
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JpegModelError,
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Sampling,
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decode_rgb,
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encode_rgb,
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fdct,
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idct,
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scaled_quant_table,
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LUMA_QUANT,
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)
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def _pattern(width: int, height: int) -> bytes:
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data = bytearray()
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for y_pos in range(height):
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for x_pos in range(width):
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data.extend(
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(
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(x_pos * 17 + y_pos * 3) & 0xFF,
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(x_pos * 5 + y_pos * 19) & 0xFF,
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(x_pos * 11 + y_pos * 7) & 0xFF,
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)
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)
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return bytes(data)
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def test_constant_block_transform_round_trip() -> None:
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coefficients = fdct([1] * 64)
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assert coefficients[0] == 8
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assert coefficients[1:] == (0,) * 63
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assert idct(coefficients) == (1,) * 64
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def test_quality_scaling_bounds() -> None:
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assert scaled_quant_table(LUMA_QUANT, 50) == LUMA_QUANT
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assert scaled_quant_table(LUMA_QUANT, 100) == (1,) * 64
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assert max(scaled_quant_table(LUMA_QUANT, 1)) == 255
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with pytest.raises(ValueError, match="1..100"):
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scaled_quant_table(LUMA_QUANT, 0)
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@pytest.mark.parametrize(
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"sampling",
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[Sampling.GRAY, Sampling.YUV444, Sampling.YUV422, Sampling.YUV420],
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)
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@pytest.mark.parametrize("dimensions", [(1, 1), (8, 8), (17, 15), (31, 19)])
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def test_baseline_round_trip(sampling: Sampling, dimensions: tuple[int, int]) -> None:
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width, height = dimensions
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encoded = encode_rgb(_pattern(width, height), width, height, quality=90, sampling=sampling)
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decoded = decode_rgb(encoded)
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assert decoded.width == width
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assert decoded.height == height
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assert decoded.sampling == sampling
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assert len(decoded.rgb) == width * height * 3
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assert encoded[:2] == b"\xff\xd8"
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assert encoded[-2:] == b"\xff\xd9"
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def test_restart_markers_round_trip() -> None:
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encoded = encode_rgb(
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_pattern(33, 25),
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33,
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25,
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quality=80,
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sampling=Sampling.YUV420,
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restart_interval=1,
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)
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assert b"\xff\xd0" in encoded
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assert b"\xff\xd1" in encoded
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decoded = decode_rgb(encoded)
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assert (decoded.width, decoded.height) == (33, 25)
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def test_dimension_and_process_rejections() -> None:
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encoded = encode_rgb(_pattern(8, 8), 8, 8)
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with pytest.raises(JpegModelError, match="dimension limit"):
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decode_rgb(encoded, max_dimension=7)
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progressive = encoded.replace(b"\xff\xc0", b"\xff\xc2", 1)
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with pytest.raises(JpegModelError, match="unsupported JPEG frame process"):
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decode_rgb(progressive)
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with pytest.raises(JpegModelError):
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decode_rgb(encoded[:-3])
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def test_stream_is_accepted_by_pillow_when_available() -> None:
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pillow = pytest.importorskip("PIL.Image")
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encoded = encode_rgb(_pattern(19, 13), 19, 13, quality=85, sampling=Sampling.YUV420)
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image = pillow.open(io.BytesIO(encoded))
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image.load()
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assert image.size == (19, 13)
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assert image.mode == "RGB"
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