spotify-downloader/spotdl/encode/encoders/tests/test_ffmpeg.py

from spotdl.encode import EncoderBase
from spotdl.encode.exceptions import FFmpegNotFoundError
from spotdl.encode.encoders import EncoderFFmpeg

import pytest

class TestEncoderFFmpeg:
    def test_subclass(self):
        assert issubclass(EncoderFFmpeg, EncoderBase)

    def test_ffmpeg_not_found_error(self):
        with pytest.raises(FFmpegNotFoundError):
            EncoderFFmpeg(encoder_path="/a/nonexistent/path")


class TestEncodingDefaults:
    def m4a_to_mp3_encoder(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:v', 'copy',
            '-codec:a', 'libmp3lame',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-f', 'mp3',
            target_path
        ]
        return command

    def m4a_to_opus_encoder(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:a', 'libopus',
            '-vbr', 'on',
            '-b:a', '192k',
            '-vn',
            '-f', 'opus',
            target_path
        ]
        return command

    def m4a_to_m4a_encoder(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-acodec', 'copy',
            '-b:a', '192k',
            '-vn',
            '-f', 'm4a',
             target_path
        ]
        return command

    def m4a_to_flac_encoder(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:a', 'flac',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-f', 'flac',
            target_path
        ]
        return command

    @pytest.mark.parametrize("files, expected_command", [
        (("test.m4a", "test.mp3"), m4a_to_mp3_encoder("test.m4a", "test.mp3")),
        (("abc.m4a", "cba.opus"), m4a_to_opus_encoder("abc.m4a", "cba.opus")),
        (("bla bla.m4a", "ble ble.m4a"), m4a_to_m4a_encoder("bla bla.m4a", "ble ble.m4a")),
        (("😛.m4a", "• tongue.flac"), m4a_to_flac_encoder("😛.m4a", "• tongue.flac")),
    ])
    def test_generate_encode_command(self, files, expected_command):
        encoder = EncoderFFmpeg()
        assert encoder._generate_encode_command(*files) == expected_command


class TestEncodingInDebugMode:
    def m4a_to_mp3_encoder_with_debug(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-loglevel', 'debug',
            '-i', input_path,
            '-codec:v', 'copy',
            '-codec:a', 'libmp3lame',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-f', 'mp3',
            target_path
        ]
        return command

    def m4a_to_opus_encoder_with_debug(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-loglevel', 'debug',
            '-i', input_path,
            '-codec:a', 'libopus',
            '-vbr', 'on',
            '-b:a', '192k',
            '-vn',
            '-f', 'opus',
             target_path
        ]
        return command

    def m4a_to_m4a_encoder_with_debug(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-loglevel', 'debug',
            '-i', input_path,
            '-acodec', 'copy',
            '-b:a', '192k',
            '-vn',
            '-f', 'm4a',
             target_path
        ]
        return command

    def m4a_to_flac_encoder_with_debug(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-loglevel', 'debug',
            '-i', input_path,
            '-codec:a', 'flac',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-f', 'flac',
             target_path
        ]
        return command

    @pytest.mark.parametrize("files, expected_command", [
        (("test.m4a", "test.mp3"), m4a_to_mp3_encoder_with_debug("test.m4a", "test.mp3")),
        (("abc.m4a", "cba.opus"), m4a_to_opus_encoder_with_debug("abc.m4a", "cba.opus")),
        (("bla bla.m4a", "ble ble.m4a"), m4a_to_m4a_encoder_with_debug("bla bla.m4a", "ble ble.m4a")),
        (("😛.m4a", "• tongue.flac"), m4a_to_flac_encoder_with_debug("😛.m4a", "• tongue.flac")),
    ])
    def test_generate_encode_command_with_debug(self, files, expected_command):
        encoder = EncoderFFmpeg()
        encoder.set_debuglog()
        assert encoder._generate_encode_command(*files) == expected_command


class TestEncodingAndTrimSilence:
    def m4a_to_mp3_encoder_and_trim_silence(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:v', 'copy',
            '-codec:a', 'libmp3lame',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-af', 'silenceremove=start_periods=1',
            '-f', 'mp3',
            target_path
        ]
        return command

    def m4a_to_opus_encoder_and_trim_silence(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:a', 'libopus',
            '-vbr', 'on',
            '-b:a', '192k',
            '-vn',
            '-af', 'silenceremove=start_periods=1',
            '-f', 'opus',
            target_path
        ]
        return command

    def m4a_to_m4a_encoder_and_trim_silence(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-acodec', 'copy',
            '-b:a', '192k',
            '-vn',
            '-af', 'silenceremove=start_periods=1',
            '-f', 'm4a',
            target_path
        ]
        return command

    def m4a_to_flac_encoder_and_trim_silence(input_path, target_path):
        command = [
            'ffmpeg', '-y', '-nostdin', '-hide_banner', '-nostats', '-v', 'panic',
            '-i', input_path,
            '-codec:a', 'flac',
            '-ar', '48000',
            '-b:a', '192k',
            '-vn',
            '-af', 'silenceremove=start_periods=1',
            '-f', 'flac',
            target_path
        ]
        return command

    @pytest.mark.parametrize("files, expected_command", [
        (("test.m4a", "test.mp3"), m4a_to_mp3_encoder_and_trim_silence("test.m4a", "test.mp3")),
        (("abc.m4a", "cba.opus"), m4a_to_opus_encoder_and_trim_silence("abc.m4a", "cba.opus")),
        (("bla bla.m4a", "ble ble.m4a"), m4a_to_m4a_encoder_and_trim_silence("bla bla.m4a", "ble ble.m4a")),
        (("😛.m4a", "• tongue.flac"), m4a_to_flac_encoder_and_trim_silence("😛.m4a", "• tongue.flac")),
    ])
    def test_generate_encode_command_and_trim_silence(self, files, expected_command):
        encoder = EncoderFFmpeg()
        encoder.set_trim_silence()
        assert encoder._generate_encode_command(*files) == expected_command