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/*
* Copyright (C) 2000-2002 the xine project
*
* This file is part of xine, a free video player.
*
* xine is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* xine is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* YUV4MPEG2 File Demuxer by Mike Melanson (melanson@pcisys.net)
* For more information regarding the YUV4MPEG2 file format and associated
* tools, visit:
* http://mjpeg.sourceforge.net/
*
* $Id: demux_yuv4mpeg2.c,v 1.13 2002/12/08 21:43:52 miguelfreitas Exp $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "xine_internal.h"
#include "xineutils.h"
#include "compat.h"
#include "demux.h"
#include "bswap.h"
#define Y4M_SIGNATURE_SIZE 9
#define Y4M_SIGNATURE "YUV4MPEG2"
#define Y4M_FRAME_SIGNATURE_SIZE 6
#define Y4M_FRAME_SIGNATURE "FRAME\x0A"
/* number of header bytes is completely arbitrary */
#define Y4M_HEADER_BYTES 100
typedef struct {
demux_plugin_t demux_plugin;
xine_stream_t *stream;
config_values_t *config;
fifo_buffer_t *video_fifo;
fifo_buffer_t *audio_fifo;
input_plugin_t *input;
pthread_t thread;
int thread_running;
pthread_mutex_t mutex;
int send_end_buffers;
off_t data_start;
off_t data_size;
int status;
xine_bmiheader bih;
unsigned int fps;
unsigned int frame_pts_inc;
unsigned int frame_size;
int seek_flag;
char last_mrl[1024];
} demux_yuv4mpeg2_t;
typedef struct {
demux_class_t demux_class;
/* class-wide, global variables here */
xine_t *xine;
config_values_t *config;
} demux_yuv4mpeg2_class_t;
/* returns 1 if the YUV4MPEG2 file was opened successfully, 0 otherwise */
static int open_yuv4mpeg2_file(demux_yuv4mpeg2_t *this) {
unsigned char header[Y4M_HEADER_BYTES];
int i;
this->bih.biWidth = this->bih.biHeight = this->fps = this->data_start = 0;
/* back to the start */
this->input->seek(this->input, 0, SEEK_SET);
/* read a chunk of bytes that should contain all the header info */
if (this->input->read(this->input, header, Y4M_HEADER_BYTES) !=
Y4M_HEADER_BYTES)
return 0;
/* check for the Y4M signature */
if (memcmp(header, Y4M_SIGNATURE, Y4M_SIGNATURE_SIZE) != 0)
return 0;
/* seek for the width (starts with " W") */
i = 0;
while ((header[i] != ' ') || (header[i + 1] != 'W'))
if (i < Y4M_HEADER_BYTES - 2)
i++;
else
break;
i += 2;
this->bih.biWidth = atoi(&header[i]);
/* go after the height next (starts with " H") */
while ((header[i] != ' ') || (header[i + 1] != 'H'))
if (i < Y4M_HEADER_BYTES - 2)
i++;
else
break;
i += 2;
this->bih.biHeight = atoi(&header[i]);
/* compute the size of an individual frame */
this->frame_size = this->bih.biWidth * this->bih.biHeight * 3 / 2;
/* find the frames/sec (starts with " F") */
while ((header[i] != ' ') || (header[i + 1] != 'F'))
if (i < Y4M_HEADER_BYTES - 2)
i++;
else
break;
i += 2;
this->fps = atoi(&header[i]);
this->frame_pts_inc = 90000 / this->fps;
/* finally, look for the first frame */
while ((header[i + 0] != 'F') ||
(header[i + 1] != 'R') ||
(header[i + 2] != 'A') ||
(header[i + 3] != 'M') ||
(header[i + 4] != 'E'))
if (i < Y4M_HEADER_BYTES - 5)
i++;
else
break;
this->data_start = i;
this->data_size = this->input->get_length(this->input) -
this->data_start;
/* make sure all the data was found */
if (!this->bih.biWidth || !this->bih.biHeight ||
!this->fps || !this->data_start)
return 0;
/* seek to first frame */
this->input->seek(this->input, this->data_start, SEEK_SET);
return 1;
}
static int demux_yuv4mpeg2_send_chunk(demux_plugin_t *this_gen) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
buf_element_t *buf = NULL;
unsigned char preamble[Y4M_FRAME_SIGNATURE_SIZE];
int bytes_remaining;
off_t current_file_pos;
int64_t pts;
/* validate that this is an actual frame boundary */
if (this->input->read(this->input, preamble, Y4M_FRAME_SIGNATURE_SIZE) !=
Y4M_FRAME_SIGNATURE_SIZE) {
this->status = DEMUX_FINISHED;
return this->status;
}
if (memcmp(preamble, Y4M_FRAME_SIGNATURE, Y4M_FRAME_SIGNATURE_SIZE) !=
0) {
this->status = DEMUX_FINISHED;
return this->status;
}
/* load and dispatch the raw frame */
bytes_remaining = this->frame_size;
current_file_pos =
this->input->get_current_pos(this->input) - this->data_start;
pts = current_file_pos;
pts /= (this->frame_size + Y4M_FRAME_SIGNATURE_SIZE);
pts *= this->frame_pts_inc;
/* reset the pts after a seek */
if (this->seek_flag) {
xine_demux_control_newpts(this->stream, pts, BUF_FLAG_SEEK);
this->seek_flag = 0;
}
while(bytes_remaining) {
buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
buf->type = BUF_VIDEO_YV12;
buf->input_pos = current_file_pos;
buf->input_length = this->data_size;
buf->pts = pts;
if (bytes_remaining > buf->max_size)
buf->size = buf->max_size;
else
buf->size = bytes_remaining;
bytes_remaining -= buf->size;
if (this->input->read(this->input, buf->content, buf->size) !=
buf->size) {
this->status = DEMUX_FINISHED;
break;
}
if (!bytes_remaining)
buf->decoder_flags |= BUF_FLAG_FRAME_END;
this->video_fifo->put(this->video_fifo, buf);
}
return this->status;
}
static void demux_yuv4mpeg2_send_headers(demux_plugin_t *this_gen) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
buf_element_t *buf;
this->video_fifo = this->stream->video_fifo;
this->audio_fifo = this->stream->audio_fifo;
this->status = DEMUX_OK;
/* load stream information */
this->stream->stream_info[XINE_STREAM_INFO_HAS_VIDEO] = 1;
this->stream->stream_info[XINE_STREAM_INFO_HAS_AUDIO] = 0;
this->stream->stream_info[XINE_STREAM_INFO_VIDEO_WIDTH] = this->bih.biWidth;
this->stream->stream_info[XINE_STREAM_INFO_VIDEO_HEIGHT] = this->bih.biHeight;
/* send start buffers */
xine_demux_control_start(this->stream);
/* send init info to decoders */
buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
buf->decoder_flags = BUF_FLAG_HEADER;
buf->decoder_info[0] = 0;
buf->decoder_info[1] = this->frame_pts_inc; /* initial video_step */
memcpy(buf->content, &this->bih, sizeof(this->bih));
buf->size = sizeof(this->bih);
buf->type = BUF_VIDEO_YV12;
this->video_fifo->put (this->video_fifo, buf);
}
static int demux_yuv4mpeg2_seek (demux_plugin_t *this_gen,
off_t start_pos, int start_time) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
/* YUV4MPEG2 files are essentially constant bit-rate video. Seek along
* the calculated frame boundaries. Divide the requested seek offset
* by the frame size integer-wise to obtain the desired frame number
* and then multiply the frame number by the frame size to get the
* starting offset. Add the data_start offset to obtain the final
* offset. */
start_pos /= (this->frame_size + Y4M_FRAME_SIGNATURE_SIZE);
start_pos *= (this->frame_size + Y4M_FRAME_SIGNATURE_SIZE);
start_pos += this->data_start;
this->input->seek(this->input, start_pos, SEEK_SET);
this->seek_flag = 1;
this->status = DEMUX_OK;
xine_demux_flush_engine (this->stream);
/* if thread is not running, initialize demuxer */
if( !this->stream->demux_thread_running ) {
/* send new pts */
xine_demux_control_newpts(this->stream, 0, 0);
this->status = DEMUX_OK;
}
return this->status;
}
static void demux_yuv4mpeg2_dispose (demux_plugin_t *this_gen) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
free(this);
}
static int demux_yuv4mpeg2_get_status (demux_plugin_t *this_gen) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
return this->status;
}
static int demux_yuv4mpeg2_get_stream_length (demux_plugin_t *this_gen) {
demux_yuv4mpeg2_t *this = (demux_yuv4mpeg2_t *) this_gen;
return (this->data_size / (this->frame_size + Y4M_FRAME_SIGNATURE_SIZE) /
this->fps);
}
static uint32_t demux_yuv4mpeg2_get_capabilities(demux_plugin_t *this_gen) {
return DEMUX_CAP_NOCAP;
}
static int demux_yuv4mpeg2_get_optional_data(demux_plugin_t *this_gen,
void *data, int data_type) {
return DEMUX_OPTIONAL_UNSUPPORTED;
}
static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *stream,
input_plugin_t *input_gen) {
input_plugin_t *input = (input_plugin_t *) input_gen;
demux_yuv4mpeg2_t *this;
if (! (input->get_capabilities(input) & INPUT_CAP_SEEKABLE)) {
printf(_("demux_yuv4mpeg2.c: input not seekable, can not handle!\n"));
return NULL;
}
this = xine_xmalloc (sizeof (demux_yuv4mpeg2_t));
this->stream = stream;
this->input = input;
this->demux_plugin.send_headers = demux_yuv4mpeg2_send_headers;
this->demux_plugin.send_chunk = demux_yuv4mpeg2_send_chunk;
this->demux_plugin.seek = demux_yuv4mpeg2_seek;
this->demux_plugin.dispose = demux_yuv4mpeg2_dispose;
this->demux_plugin.get_status = demux_yuv4mpeg2_get_status;
this->demux_plugin.get_stream_length = demux_yuv4mpeg2_get_stream_length;
this->demux_plugin.get_video_frame = NULL;
this->demux_plugin.got_video_frame_cb= NULL;
this->demux_plugin.get_capabilities = demux_yuv4mpeg2_get_capabilities;
this->demux_plugin.get_optional_data = demux_yuv4mpeg2_get_optional_data;
this->demux_plugin.demux_class = class_gen;
this->status = DEMUX_FINISHED;
switch (stream->content_detection_method) {
case METHOD_BY_CONTENT:
case METHOD_EXPLICIT:
if (!open_yuv4mpeg2_file(this)) {
free (this);
return NULL;
}
break;
case METHOD_BY_EXTENSION: {
char *ending, *mrl;
mrl = input->get_mrl (input);
ending = strrchr(mrl, '.');
if (!ending) {
free (this);
return NULL;
}
if (strncasecmp (ending, ".y4m", 4)) {
free (this);
return NULL;
}
if (!open_yuv4mpeg2_file(this)) {
free (this);
return NULL;
}
}
break;
default:
free (this);
return NULL;
}
strncpy (this->last_mrl, input->get_mrl (input), 1024);
/* print vital stats */
xine_log (this->stream->xine, XINE_LOG_MSG,
_("demux_yuv4mpeg2: raw YV12 video @ %d x %d\n"),
this->bih.biWidth,
this->bih.biHeight);
return &this->demux_plugin;
}
static char *get_description (demux_class_t *this_gen) {
return "YUV4MPEG2 file demux plugin";
}
static char *get_identifier (demux_class_t *this_gen) {
return "YUV4MPEG2";
}
static char *get_extensions (demux_class_t *this_gen) {
return "y4m";
}
static char *get_mimetypes (demux_class_t *this_gen) {
return NULL;
}
static void class_dispose (demux_class_t *this_gen) {
demux_yuv4mpeg2_class_t *this = (demux_yuv4mpeg2_class_t *) this_gen;
free (this);
}
static void *init_plugin (xine_t *xine, void *data) {
demux_yuv4mpeg2_class_t *this;
this = xine_xmalloc (sizeof (demux_yuv4mpeg2_class_t));
this->config = xine->config;
this->xine = xine;
this->demux_class.open_plugin = open_plugin;
this->demux_class.get_description = get_description;
this->demux_class.get_identifier = get_identifier;
this->demux_class.get_mimetypes = get_mimetypes;
this->demux_class.get_extensions = get_extensions;
this->demux_class.dispose = class_dispose;
return this;
}
/*
* exported plugin catalog entry
*/
plugin_info_t xine_plugin_info[] = {
/* type, API, "name", version, special_info, init_function */
{ PLUGIN_DEMUX, 18, "yuv4mpeg2", XINE_VERSION_CODE, NULL, init_plugin },
{ PLUGIN_NONE, 0, "", 0, NULL, NULL }
};
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