#!/usr/bin/python

"""

rewrite all the songs with silence at the start and end

"""

import sys, wave, logging, os

sys.path.append(".")

from light9 import networking, showconfig

from light9.namespaces import L9

logging.basicConfig(level=logging.INFO)

log = logging.getLogger()

introPad = 4

postPad = 4

graph = showconfig.getGraph()

# instead of taking a show uri like it should, i just convert every

# path i find in the graph (hoping that you only loaded statements for

# the current show)

for p in sorted(graph.objects(None, L9['showPath'])):

    assert p.startswith("file://")

    p = p[len("file://"):]

    log.info("read %s", p)

    inputWave = wave.open(p, 'r')

    outputDir = os.path.join(os.path.dirname(p), "pad")

    try:

        os.makedirs(outputDir)

    except OSError:

        pass # exists

    outputPath = os.path.join(outputDir, os.path.basename(p))

    outputWave = wave.open(outputPath, 'w')

    outputWave.setparams(inputWave.getparams())

    bytesPerSecond = (inputWave.getnchannels() * inputWave.getsampwidth() *

                      inputWave.getframerate())

    outputWave.writeframesraw("\x00" * (bytesPerSecond * introPad))

    outputWave.writeframesraw(inputWave.readframes(inputWave.getnframes()))

    outputWave.writeframesraw("\x00" * (bytesPerSecond * postPad))

    outputWave.close()

    log.info("wrote %s", outputPath)