Class: FFruby::File

Inherits:
Object
  • Object
show all
Defined in:
ext/ffruby/ffrubyfile.c,
ext/ffruby/ffrubyfile.c

Overview

An interface to FFmpeg on existing files. Provides access to metadata and stream instances.

Instance Method Summary collapse

Constructor Details

#new(filename) ⇒ FFruby::File

Creates an FFruby::File instance using the given filename.



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# File 'ext/ffruby/ffrubyfile.c', line 207

static VALUE ffrf_initialize(VALUE self, VALUE filename)
{
	size_t len;
	char* msg;
	AVFormatContext *fmt;
	VALUE exception;

	VALUE filename_str = rb_funcall(filename, rb_intern("to_s"), 0);
    char* filename_ptr = RSTRING(filename_str)->ptr;

	if (av_open_input_file(&fmt, filename_ptr, NULL, 0, NULL) != 0)
	{
		len = strlen("Cannot open file !") + strlen(filename_ptr) + 1;
		msg = ALLOC_N(char, len);
		snprintf(msg, len, "Cannot open file %s!", filename_ptr);
		exception = rb_exc_new2(rb_eIOError, msg);
		free(msg);
		rb_exc_raise(exception);
	}

	if (av_find_stream_info(fmt) < 0)
	{
		len = strlen("Problem reading file !") + strlen(filename_ptr) + 1;
		msg = ALLOC_N(char, len);
		snprintf(msg, len, "Problem reading file %s!", filename_ptr);
		exception = rb_exc_new2(rb_eIOError, msg);
		free(msg);
		rb_exc_raise(exception);
	}

	DATA_PTR(self) = fmt;
	return self;
}

Instance Method Details

#album ⇒ Object

Returns the album string.



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# File 'ext/ffruby/ffrubyfile.c', line 85

static VALUE ffrf_album(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->album);
}

#audio_streams ⇒ Object

Returns an array of audio streams contained within this file.



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# File 'ext/ffruby/ffrubyfile.c', line 198

static VALUE ffrf_audio_streams(VALUE self)
{
	return ffrf_av_streams(self, cFFrubyAudioStream);
}

#author ⇒ Object

Returns the author string.



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# File 'ext/ffruby/ffrubyfile.c', line 64

static VALUE ffrf_author(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->author);
}

#bit_rate ⇒ Object

Returns the bit rate.



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# File 'ext/ffruby/ffrubyfile.c', line 120

static VALUE ffrf_bit_rate(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return INT2NUM(fmt->bit_rate);
}

#comment ⇒ Object

Returns the comment string.



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# File 'ext/ffruby/ffrubyfile.c', line 78

static VALUE ffrf_comment(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->comment);
}

#copyright ⇒ Object

Returns the copyright string.



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# File 'ext/ffruby/ffrubyfile.c', line 71

static VALUE ffrf_copyright(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->copyright);
}

#duration ⇒ Object

Returns the duration in seconds as a float.



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# File 'ext/ffruby/ffrubyfile.c', line 113

static VALUE ffrf_duration(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_float_new((double) fmt->duration / (double) AV_TIME_BASE);
}

#format ⇒ Object

Returns the format name.



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# File 'ext/ffruby/ffrubyfile.c', line 127

static VALUE ffrf_format(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->iformat->name);
}

#genre ⇒ Object

Returns the genre string.



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# File 'ext/ffruby/ffrubyfile.c', line 92

static VALUE ffrf_genre(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->genre);
}

#streams ⇒ Object

Returns an array of streams contained within this file.



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# File 'ext/ffruby/ffrubyfile.c', line 134

static VALUE ffrf_streams(VALUE self)
{
	unsigned int i;
	AVFormatContext *fmt;
	VALUE streams;
	VALUE* args;

	if ((streams = rb_iv_get(self, "@streams")) == Qnil)
	{
		fmt = ffrf_get_fmt(self);
		streams = rb_ary_new();
		rb_iv_set(self, "@streams", streams);

		args = (VALUE*) ALLOCA_N(VALUE*, 2);
		args[0] = self;

		for (i = 0; i < fmt->nb_streams; i++)
		{
			args[1] = INT2FIX(i);

			switch (fmt->streams[i]->codec->codec_type)
			{
				case CODEC_TYPE_VIDEO:
					rb_ary_push(streams, rb_class_new_instance(2, args, cFFrubyVideoStream));
					break;
				case CODEC_TYPE_AUDIO:
					rb_ary_push(streams, rb_class_new_instance(2, args, cFFrubyAudioStream));
					break;
				default:
					break;
			}
		}
	}

	return streams;
}

#title ⇒ Object

Returns the title string.



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# File 'ext/ffruby/ffrubyfile.c', line 57

static VALUE ffrf_title(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return rb_str_new2(fmt->title);
}

#track ⇒ Object

Returns the track number.



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# File 'ext/ffruby/ffrubyfile.c', line 106

static VALUE ffrf_track(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return INT2NUM(fmt->track);
}

#video_streams ⇒ Object

Returns an array of video streams contained within this file.



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# File 'ext/ffruby/ffrubyfile.c', line 192

static VALUE ffrf_video_streams(VALUE self)
{
	return ffrf_av_streams(self, cFFrubyVideoStream);
}

#year ⇒ Object

Returns the year.



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# File 'ext/ffruby/ffrubyfile.c', line 99

static VALUE ffrf_year(VALUE self)
{
	AVFormatContext *fmt = ffrf_get_fmt(self);
	return INT2NUM(fmt->year);
}