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add decodebin2 caps, stereo audio timeline

This commit is contained in:
j 2010-11-07 15:16:29 +01:00
parent 38261db238
commit 716612999c
2 changed files with 44 additions and 19 deletions
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61
oxtimeline/audio.py
View File

@ -13,10 +13,11 @@ import gst
class Audio(gst.Pipeline):
_data = []
_left = []
_right = []
position = 0
def __init__(self, uri, samplerate=22050, channels=1):
def __init__(self, uri, samplerate=22050, channels=2):
gst.Pipeline.__init__(self)
self.duration = -1
self.framerate = 25
@ -28,6 +29,8 @@ class Audio(gst.Pipeline):
self.src = gst.element_factory_make("filesrc")
self.src.props.location = self.uri
self.sbin = gst.element_factory_make("decodebin2")
self.sbin.props.caps = gst.Caps("audio/x-raw-int;audio/x-raw-float")
self.sbin.props.expose_all_streams = False
self.queue = gst.element_factory_make("queue")
self.rate = gst.element_factory_make("audioresample")
@ -60,33 +63,53 @@ class Audio(gst.Pipeline):
def _data_callback(self, sink, buff, pad):
timestamp = buff.timestamp
samples = buff.size // 2
samples = int(buff.size // 2 / self.channels)
fmt = "<" + str(samples) + "h"
data = unpack(fmt, buff.data)
data = self._data + list(data)
samples_per_pixel = self.samplerate / self.framerate
while len(data) > samples_per_pixel:
pixel = data[:samples_per_pixel]
left = unpack(fmt, buff.data[:2*samples])
left = self._left + list(left)
right = unpack(fmt, buff.data[2*samples:])
right = self._right + list(right)
samples_per_pixel = int(self.samplerate / self.framerate)
while len(left) > samples_per_pixel:
pixel = left[:samples_per_pixel]
pixel = np.asarray(pixel)
data = data[samples_per_pixel:]
left = left[samples_per_pixel:]
l = np.sum(np.abs(pixel)) / samples_per_pixel
l = int(l / 256)
lheight = int((l * self.tile_height) / 256) * 2
if l: l += 20
l = (l, l, l, 255)
pixel = right[:samples_per_pixel]
pixel = np.asarray(pixel)
right = right[samples_per_pixel:]
r = np.sum(np.abs(pixel)) / samples_per_pixel
r = int(r / 256)
rheight = int((r * self.tile_height) / 256) * 2
if r: r += 20
r = (r, r, r, 255)
p = np.sum(np.abs(pixel)) / samples_per_pixel
p = p / 256
height = int((p * self.tile_height) / 256) * 2
if p: p += 20
p = (p, p, p, 255)
tile = int(math.floor(float(self.position) / self.input_tile_width))
tilePos = self.position - (tile * self.input_tile_width)
tilePos = int(self.position - (tile * self.input_tile_width))
crop = (self.tile_height-height) / 2
lcrop = int((self.tile_height-lheight) / 2)
rcrop = int((self.tile_height-rheight) / 2)
for i in range(crop, self.tile_height-crop):
self.tiles[tile].putpixel((tilePos, i), p)
for i in range(lcrop, int(self.tile_height/2)):
self.tiles[tile].putpixel((tilePos, i), l)
for i in range(int(self.tile_height/2), self.tile_height-rcrop):
self.tiles[tile].putpixel((tilePos, i), r)
self.position += 1
self._data = data
self._left = left
self._right = right
if self.mainloop and timestamp >= self.duration:
self.done()

2
oxtimeline/video.py
View File

@ -24,6 +24,8 @@ class Video(gst.Pipeline):
self.src = gst.element_factory_make("filesrc")
self.src.props.location = uri
self.sbin = gst.element_factory_make("decodebin2")
self.sbin.props.caps = gst.Caps("video/x-raw-yuv;video/x-raw-rgb")
self.sbin.props.expose_all_streams = False
self.csp = gst.element_factory_make("ffmpegcolorspace")
self.scale = gst.element_factory_make("videoscale")