User:Elleke Hageman/Python: Sound and Image

Image #2 (above)

import struct, array
 
width = 320
height = 240
 
filename="original.tga"
datafile = open(filename, "wb")

header = struct.pack("<BBBHHBHHHHBB", 0, 0, 2, 0, 0, 8, 0, 0, width, height, 24, 1 << 5)
datafile.write(header)
 
data = ''
 
for y in xrange(50):
    for x in xrange(50):
        r, g, b = 5, 0, 205
        #achtergrond

        if x > 10 and x < 10: 
                #middenstuk eerste cf breedte ervoor 2de breedte ding zelf
            g = 255
 
        if y < 20:
            #hoogte bovenste kolom
            r = 255
 
        if y > 120:
            b = 128

for x in xrange(50):
    for y in xrange(50):

        if y > 10 and x < 10: 
                #middenstuk eerste cf breedte ervoor 2de breedte ding zelf
            g = 255
 
        if y < 20:
            #hoogte bovenste kolom
            r = 255
 
        if y > 120:
            b = 128

 
        data += struct.pack('B', b)
        data += struct.pack('B', g)
        data += struct.pack('B', r)
 
datafile.write(data)
datafile.close()

Image #1 (failed attempt)

import struct, array
 
width = 320
height = 240
 
filename="image1.tga"
datafile = open(filename, "wb")
# TGA format: http://gpwiki.org/index.php/TGA
# Offset, ColorType, ImageType, PaletteStart, PaletteLen, PalBits, XOrigin, YOrigin, Width, Height, BPP, Orientation
header = struct.pack("<BBBHHBHHHHBB", 0, 0, 2, 0, 0, 8, 0, 0, width, height, 24, 1 << 5)
datafile.write(header)
 
data = ''
 
for y in xrange(320):
    for x in xrange(240):
        r, g, b = 150, 0, 205
 
        if y < 32:
            r = 217
 
        if x > 64 and x < 256:
            g = 0
 
        if y > 120:
            b = 10
 
        data += struct.pack('B', b)
        data += struct.pack('B', g)
        data += struct.pack('B', r)


for y in xrange(170):
    for x in xrange(90):
        r, g, b = 100, 100, 100
 
        if y < 150:
            r = 192
 
        if x > 80 and x < 256:
            g = 4
 
        if y > 200:
            b = 159
 
        data += struct.pack('B', b)
        data += struct.pack('B', g)
        data += struct.pack('B', r)       


for y in xrange(height):
    for x in xrange(width):
        r, g, b = 0, 0, 0
 
        if y < 32:
            r = 36
 
        if x > 64 and x < 256:
            g = 0
 
        if y > 120:
            b = 217
 
        data += struct.pack('B', b)
        data += struct.pack('B', g)
        data += struct.pack('B', r)       
 
datafile.write(data)
datafile.close()

'''Sound #1'''
<source lang="python">
import wave, struct
 
filename = "sound.wav"
nframes=0
nchannels=1
sampwidth=1 # in bytes so 2=16bit, 1=8bit
framerate=44100
bufsize=2048
 
w = wave.open(filename, 'w')
w.setparams((nchannels, sampwidth, framerate, nframes, 'NONE', 'not compressed'))
 
max_amplitude = float(int((2 ** (sampwidth * 8)) / 2) - 1)
 
# split the samples into chunks (to reduce memory consumption and improve performance)
#for chunk in grouper(bufsize, samples):
#    frames = ''.join(''.join(struct.pack('h', int(max_amplitude * sample)) for sample in channels) for channels in chunk if channels is not None)
#    w.writeframesraw(frames)
 
freq = 15000
# this means that FREQ times a second, we need to complete a cycle
# there are FRAMERATE samples per second
# so FRAMERATE / FREQ = CYCLE LENGTH
cycle = framerate / freq
 
 
data = ''
for i in range(10):
    for x in range(20000):
        data += struct.pack('h', int(0.4 * max_amplitude))
    for x in range(1000):
        data += struct.pack('h', int(-0.8 * max_amplitude))
 
w.writeframesraw(data)
 
w.close()

Sound #2

import wave, struct
 
filename = "sound2.wav"
nframes=0
nchannels=1
sampwidth=2 
framerate=44100
bufsize=2048
 
w = wave.open(filename, 'w')
w.setparams((nchannels, sampwidth, framerate, nframes, 'NONE', 'not compressed'))
 
max_amplitude = float(int((2 ** (sampwidth * 8)) / 2) - 1)

 
freq = 1200
cycle = framerate / freq
 
 
data = ''
for i in range(500):
    for _ in range(cycle/1):
        data += struct.pack('h', int(0.5 * max_amplitude))
    for _ in range(cycle/1):
        data += struct.pack('h', int(-0.5 * max_amplitude))

freq = 200
cycle = framerate / freq
 
for _ in range(100):
    data = ''
    cycle = framerate / freq
    for _ in range(190):
        for _ in range(cycle/2):
            data += struct.pack('h', int(0.5 * max_amplitude))
            data += struct.pack('h', 0)
        for _ in range(cycle/2):
            data += struct.pack('h', int(-0.5 * max_amplitude))
            data += struct.pack('h', 0)      
 
w.writeframesraw(data)
 
w.close()