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cf15661e9c
Some mpeg versions use LSF (low sampling frequency) when encoding low sample rates which changes a bit how the side info is layed out. Also skip trying to separate data and other_data as after reading up a bit on how main data begin and bit reservoir works i think it was done incorrectly. To know the real audio data length i think you need to decode the huffman tables. Instead just have a "audio_data" field which are the bits with audo data for current and possibly following frames.
311 lines
10 KiB
Plaintext
311 lines
10 KiB
Plaintext
# TODO: various gojq fq fork regression tests, should probably be move to fork code instead
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# 0xf_ffff_ffff_fffff_fffff-1 | toradix(2,8,16)
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$ fq -n '0b1111111111111111111111111111111111111111111111111111111111111111111111111110, 0o17777777777777777777777776, 0xffffffffffffffffffe'
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75557863725914323419134
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75557863725914323419134
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75557863725914323419134
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$ fq -n '[true] | all'
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true
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$ fq -n '{a:1, b: 2} | tostream'
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[
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[
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"a"
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],
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1
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]
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[
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[
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"b"
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],
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2
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]
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[
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[
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"b"
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]
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]
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$ fq -d mp3 '{(.headers[0].magic): 123}' test.mp3
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{
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"ID3": 123
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}
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$ fq -d mp3 '{(.headers[0].magic): 123}' test.mp3
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{
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"ID3": 123
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}
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$ fq -d mp3 '.frames | group_by(.side_info | {b: .main_data_end}) | map(length)' test.mp3
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[
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3
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]
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$ fq -d mp3 '.frames | map(.header) | group_by(.bitrate)' test.mp3
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[
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[
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{
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"bitrate": 56000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 0,
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"padding": "not_padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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}
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],
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[
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{
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"bitrate": 64000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 1,
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"padding": "not_padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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},
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{
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"bitrate": 64000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 1,
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"padding": "padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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}
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]
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]
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$ fq -d mp3 '.frames | map(.header) | sort_by(.bitrate)' test.mp3
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[
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{
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"bitrate": 56000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 0,
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"padding": "not_padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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},
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{
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"bitrate": 64000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 1,
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"padding": "not_padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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},
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{
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"bitrate": 64000,
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"channel_mode": "none",
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"channels": "mono",
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"copyright": 0,
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"emphasis": "none",
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"layer": 3,
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"mpeg_version": "1",
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"original": 1,
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"padding": "padded",
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"private": 0,
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"protection_absent": true,
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"sample_count": 1152,
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"sample_rate": 44100,
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"sync": 2047
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}
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]
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$ fq -d mp3 '.frames | map(.header) | sort_by(.bitrate)[0]' test.mp3
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|00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.frames[0].header{}:
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0x20| ff fb | .. | sync: 0b11111111111 (valid)
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0x20| fb | . | mpeg_version: "1" (3) (MPEG Version 1)
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0x20| fb | . | layer: 3 (1) (MPEG Layer 3)
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| | | sample_count: 1152
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0x20| fb | . | protection_absent: true (No CRC)
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0x20| 40| @| bitrate: 56000 (4)
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0x20| 40| @| sample_rate: 44100 (0)
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0x20| 40| @| padding: "not_padded" (0b0)
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0x20| 40| @| private: 0
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0x30|c0 |. | channels: "mono" (0b11)
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0x30|c0 |. | channel_mode: "none" (0b0)
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0x30|c0 |. | copyright: 0
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0x30|c0 |. | original: 0
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0x30|c0 |. | emphasis: "none" (0b0)
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$ fq -d mp3 '.frames | map(.header) | min_by(.bitrate)' test.mp3
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|00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.frames[0].header{}:
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0x20| ff fb | .. | sync: 0b11111111111 (valid)
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0x20| fb | . | mpeg_version: "1" (3) (MPEG Version 1)
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0x20| fb | . | layer: 3 (1) (MPEG Layer 3)
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| | | sample_count: 1152
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0x20| fb | . | protection_absent: true (No CRC)
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0x20| 40| @| bitrate: 56000 (4)
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0x20| 40| @| sample_rate: 44100 (0)
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0x20| 40| @| padding: "not_padded" (0b0)
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0x20| 40| @| private: 0
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0x30|c0 |. | channels: "mono" (0b11)
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0x30|c0 |. | channel_mode: "none" (0b0)
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0x30|c0 |. | copyright: 0
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0x30|c0 |. | original: 0
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0x30|c0 |. | emphasis: "none" (0b0)
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$ fq -d mp3 '.frames | map(.header) | max_by(.bitrate)' test.mp3
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|00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.frames[2].header{}:
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0x1b0| ff fb | .. | sync: 0b11111111111 (valid)
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0x1b0| fb | . | mpeg_version: "1" (3) (MPEG Version 1)
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0x1b0| fb | . | layer: 3 (1) (MPEG Layer 3)
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| | | sample_count: 1152
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0x1b0| fb | . | protection_absent: true (No CRC)
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0x1b0| 52 | R | bitrate: 64000 (5)
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0x1b0| 52 | R | sample_rate: 44100 (0)
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0x1b0| 52 | R | padding: "padded" (0b1)
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0x1b0| 52 | R | private: 0
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0x1b0| c4 | . | channels: "mono" (0b11)
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0x1b0| c4 | . | channel_mode: "none" (0b0)
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0x1b0| c4 | . | copyright: 0
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0x1b0| c4 | . | original: 1
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0x1b0| c4 | . | emphasis: "none" (0b0)
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$ fq -d mp3 '.frames[0] | . + .header | keys, .bitrate' test.mp3
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[
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"audio_data",
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"bitrate",
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"channel_mode",
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"channels",
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"copyright",
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"crc_calculated",
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"emphasis",
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"header",
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"layer",
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"mpeg_version",
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"original",
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"padding",
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"private",
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"protection_absent",
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"sample_count",
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"sample_rate",
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"side_info",
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"sync",
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"xing"
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]
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|00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|
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0x20| 40| @|.frames[0].header.bitrate: 56000 (4)
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$ fq -d mp3 '[.frames[0] | ., .header] | add | keys, .bitrate' test.mp3
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[
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"audio_data",
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"bitrate",
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"channel_mode",
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"channels",
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"copyright",
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"crc_calculated",
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"emphasis",
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"header",
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"layer",
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"mpeg_version",
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"original",
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"padding",
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"private",
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"protection_absent",
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"sample_count",
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"sample_rate",
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"side_info",
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"sync",
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"xing"
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]
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|00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|
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0x20| 40| @|.frames[0].header.bitrate: 56000 (4)
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# make sure to_entries preserve struct order
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$ fq -d mp3 '.frames[0] | keys' test.mp3
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[
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"header",
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"side_info",
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"xing",
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"audio_data",
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"crc_calculated"
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]
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$ fq -d mp3 '.frames[0] | to_entries[].key' test.mp3
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"header"
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"side_info"
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"xing"
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"audio_data"
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"crc_calculated"
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# xml, csv does string normalization, make sure it works with nested JQValue:s
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# TODO: move this test as it depends on xml
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$ fq -r '.headers[0] | toxml({indent: 2})' test.mp3
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<doc>
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<flags>
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<experimental_indicator>false</experimental_indicator>
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<extended_header>false</extended_header>
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<unsynchronisation>false</unsynchronisation>
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<unused>0</unused>
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</flags>
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<frames>
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<flags>
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<compression>false</compression>
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<data_length_indicator>false</data_length_indicator>
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<encryption>false</encryption>
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<file_alter_preservation>false</file_alter_preservation>
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<grouping_identity>false</grouping_identity>
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<read_only>false</read_only>
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<tag_alter_preservation>false</tag_alter_preservation>
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<unsync>false</unsync>
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<unused0>0</unused0>
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<unused1>0</unused1>
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<unused2>0</unused2>
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</flags>
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<id>TSSE</id>
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<size>15</size>
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<text>Lavf58.45.100</text>
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<text_encoding>utf8</text_encoding>
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</frames>
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<magic>ID3</magic>
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<padding><3E><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></padding>
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<revision>0</revision>
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<size>35</size>
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<version>4</version>
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</doc>
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$ fq -i
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null> 0b0_1
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1
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null> 0b1_0000_0000_0000_0000_0000_0000_0000_0000
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4294967296
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null> 0b0_1x
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^ unexpected token "x"
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null> 0o012_34567
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342391
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null> 0o7_0000_0000_0000_0000_0000_0000_0000_0000
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554597137599850363154807652352
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null> 0o012_34567x
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^ unexpected token "x"
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null> 0x012_3456789abcdef
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81985529216486895
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null> 0xf_0000_0000_0000_0000_0000_0000_0000_0000
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5104235503814076951950619111476523171840
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null> 0x012_3456789abcdefx
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^ unexpected token "x"
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null> ^D
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