Illusion/flac-odin
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improve the linux example

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Illusion
2024-09-24 23:07:49 +02:00
parent dfaca585fd
commit f444efc5af
1 changed files with 35 additions and 20 deletions
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example/main.odin → example/main_linux.odin
+35 -20
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@@ -1,4 +1,4 @@
package flac_example
package flac_linux_example
import "core:fmt"
import "core:mem"
@@ -51,9 +51,13 @@ main :: proc() {
os.exit(1)
}
sample_rate := flac_data.metadata.sample_rate
// TODO: channel mapping is incorrect for anything with more than 2 channels.
channels := flac_data.metadata.channels
chmap := alsa.pcm_get_chmap(handle)
fmt.println(chmap)
md5_ctx: md5.Context
md5.init(&md5_ctx)
for {
@@ -67,20 +71,30 @@ main :: proc() {
}
}
//if frame.sample_rate != sample_rate || frame.channels != channels {
// sample_rate = frame.sample_rate
// channels = frame.channels
// alsa_err = alsa.pcm_set_params(handle, .S16_LE, .RW_INTERLEAVED, u32(channels), sample_rate, 1, 0)
// if alsa_err < 0 {
// fmt.eprintln("Playback open error:", alsa.strerror(alsa_err))
// os.exit(1)
// }
//}
if frame.channels != channels {
// Finish playing the previous frame before changing the hw params.
alsa.pcm_drain(handle)
channels = frame.channels
alsa_err = alsa.pcm_set_params(handle, .S16_LE, .RW_INTERLEAVED, u32(channels), flac_data.metadata.sample_rate, 1, 500000)
if alsa_err < 0 {
fmt.eprintln("Playback open error:", alsa.strerror(alsa_err))
os.exit(1)
}
}
fmt.println("Channels:", frame.channels)
if frame.channels == 6 {
fmt.println("Sample:", len(frame.samples))
}
// TODO: resampling
// 8 bps audio
//converted_samples := make([]u8, len(samples))
//converted_samples := make([]u8, len(frame.samples))
//defer delete(converted_samples)
//for sample, i in samples {
//for sample, i in frame.samples {
// converted_samples[i] = u8(sample & 0xFF)
//}
@@ -102,13 +116,6 @@ main :: proc() {
flac.md5hash(&md5_ctx, flac_data.metadata.bits_per_sample, frame.samples)
}
end := time.now()
err = flac.md5sum(&md5_ctx, flac_data)
if err == .MD5_Mismatch {
fmt.println("Decoded audio data is not correct.")
os.exit(1)
}
alsa_err = alsa.pcm_drain(handle)
if alsa_err < 0 {
@@ -116,6 +123,14 @@ main :: proc() {
}
alsa.pcm_close(handle)
end := time.now()
err = flac.md5sum(&md5_ctx, flac_data)
if err == .MD5_Mismatch {
fmt.printfln("Decoded audio data is not correct. Expected MD5: %v, Got: %v", flac_data.metadata.expected_md5, flac_data.metadata.calculated_md5)
os.exit(1)
}
elapsed := time.diff(start, end)
fmt.println("Decoding took", elapsed)
}