jsmpeg-ffmpeg.zip

ffmpeg+websocket+jsmpeg实现html播放rtsp实时视频流，它主要是通过webSocket发送MPEG，前端通过js解析MPEG不断绘制canvas，包括音频。最终测试的结果就是一个1920*1080分辨率的画面延时大概的0.5s左右

#include 
#include 
#include 

#include “buffer.h“

typedef struct bit_buffer_t {
	uint8_t *bytes;
	unsigned int index;
	unsigned int byte_capacity;
	unsigned int byte_length;
	bit_buffer_mode_t mode;
} bit_buffer_t;

void bit_buffer_resize（bit_buffer_t *self unsigned int byte_capacity）;
void bit_buffer_evict（bit_buffer_t *self unsigned int bytes_needed）;



bit_buffer_t *bit_buffer_create（unsigned int initial_byte_capacity bit_buffer_mode_t mode） {
	bit_buffer_t *self = malloc（sizeof（bit_buffer_t））;
	self->mode = mode;
	self->bytes = malloc（initial_byte_capacity）;
	self->byte_capacity = initial_byte_capacity;
	self->byte_length = 0;
	self->index = 0;
	return self;
}


void bit_buffer_destroy（bit_buffer_t *self） {
	free（self->bytes）;
	free（self）;
}


int bit_buffer_get_index（bit_buffer_t *self） {
	return self->index;
}


void bit_buffer_set_index（bit_buffer_t *self unsigned int index） {
	self->index = index; // TODO check validity!
}


uint8_t *bit_buffer_get_write_ptr（bit_buffer_t *self unsigned int bytes_to_write） {
	int bytes_available = self->byte_capacity - self->byte_length;

	if （bytes_to_write > bytes_available） {
		if （self->mode == BIT_BUFFER_MODE_EXPAND） {
			int new_byte_capacity = self->byte_capacity * 2;
			if （new_byte_capacity + bytes_available < bytes_to_write） {
				new_byte_capacity = bytes_to_write - bytes_available;
			}
			bit_buffer_resize（self new_byte_capacity）;
		}
		else {
			bit_buffer_evict（self bytes_to_write）;
		}
	}

	return self->bytes + self->byte_length;
};


void bit_buffer_did_write（bit_buffer_t *self unsigned int bytes_written） {
	self->byte_length += bytes_written;
}


int bit_buffer_find_next_start_code（bit_buffer_t *self） {
	for （int i = （（self->index + 7） >> 3）; i < self->byte_length; i++） {
		if（
			self->bytes[i] == 0x00 &&
			self->bytes[i+1] == 0x00 &&
			self->bytes[i+2] == 0x01
		） {
			self->index = （i+4） << 3;
			return self->bytes[i+3];
		}
	}
	self->index = （self->byte_length << 3）;
	return -1;
}


int bit_buffer_find_start_code（bit_buffer_t *self int code） {
	int current = 0;
	while （true） {
		current = bit_buffer_find_next_start_code（self）;
		if （current == code || current == -1） {
			return current;
		}
	}
	return -1;
}


int bit_buffer_next_bytes_are_start_code（bit_buffer_t *self） {
	int i = （（self->index + 7） >> 3）;
	return （
		i >= self->byte_length || （
			self->bytes[i] == 0x00 && 
			self->bytes[i+1] == 0x00 &&
			self->bytes[i+2] == 0x01
		）
	）;
}


int bit_buffer_peek（bit_buffer_t *self unsigned int count） {
	int offset = self->index;
	int value = 0;
	while （count） {
		int current_byte = self->bytes[offset >> 3];
		int remaining = 8 - （offset & 7）; // remaining bits in byte
		int read = remaining < count ? remaining : count; // bits in self run
		int shift = remaining - read;
		int mask = （0xff >> （8-read））;

		value = （value << read） | （（current_byte & （mask << shift）） >> shift）;

		offset += read;
		count -= read;
	}

	return value;
}


int b

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2020-03-02 17:22  jsmpeg-master\
     文件        2273  2019-05-28 22:22  jsmpeg-master\build.sh
     文件      139179  2019-05-28 22:22  jsmpeg-master\jsmpeg.min.js
     文件        1084  2019-05-28 22:22  jsmpeg-master\LICENSE
     目录           0  2020-03-02 17:25  jsmpeg-master\node_modules\
     目录           0  2020-03-02 17:25  jsmpeg-master\node_modules\ws\
     文件         175  1985-10-26 16:15  jsmpeg-master\node_modules\ws\browser.js
     文件         296  1985-10-26 16:15  jsmpeg-master\node_modules\ws\index.js
     目录           0  2020-03-02 17:25  jsmpeg-master\node_modules\ws\lib\
     文件        3389  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\buffer-util.js
     文件         268  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\constants.js
     文件        3937  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\event-target.js
     文件        6883  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\extension.js
     文件         981  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\limiter.js
     文件       14239  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\permessage-deflate.js
     文件       11968  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\receiver.js
     文件        9523  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\sender.js
     文件        3410  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\stream.js
     文件         695  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\validation.js
     文件       11460  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\websocket-server.js
     文件       24275  1985-10-26 16:15  jsmpeg-master\node_modules\ws\lib\websocket.js
     文件        1106  1985-10-26 16:15  jsmpeg-master\node_modules\ws\LICENSE
     文件        2542  2020-03-02 17:25  jsmpeg-master\node_modules\ws\package.json
     文件       13769  1985-10-26 16:15  jsmpeg-master\node_modules\ws\README.md
     文件         299  2020-03-02 17:22  jsmpeg-master\package-lock.json
     文件       14827  2019-05-28 22:22  jsmpeg-master\README.md
     目录           0  2020-03-02 17:20  jsmpeg-master\src\
     文件        3326  2019-05-28 22:22  jsmpeg-master\src\ajax-progressive.js
     文件        1517  2019-05-28 22:22  jsmpeg-master\src\ajax.js
     文件        4498  2019-05-28 22:22  jsmpeg-master\src\buffer.js
     文件        2873  2019-05-28 22:22  jsmpeg-master\src\canvas2d.js
............此处省略23个文件信息