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/*******************************************************************************
v210.c
libquicktime - A library for reading and writing quicktime/avi/mp4 files.
http://libquicktime.sourceforge.net
Copyright (C) 2002 Heroine Virtual Ltd.
Copyright (C) 2002-2007 Members of the libquicktime project.
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation; either version 2.1 of the License, or (at your option)
any later version.
This library 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 Lesser General Public License for more
details.
You should have received a copy of the GNU Lesser General Public License along
with this library; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*******************************************************************************/
#include "lqt_private.h"
#include "workarounds.h"
#include "videocodec.h"
#include <quicktime/colormodels.h>
#include <stdlib.h>
typedef struct
{
uint8_t *buffer;
int buffer_alloc;
/* The V210 codec reqires a bytes/line that is a multiple of 128 (48 pixels). */
int64_t bytes_per_line;
int initialized;
} quicktime_v210_codec_t;
static int delete_codec(quicktime_video_map_t *vtrack)
{
quicktime_v210_codec_t *codec;
codec = ((quicktime_codec_t*)vtrack->codec)->priv;
if (codec->buffer)
free(codec->buffer);
free(codec);
return 0;
}
/*
* http://developer.apple.com/quicktime/icefloe/dispatch019.html
*
* Lines must be a multiple of 48 pixels. Bytes per luma sample is 8/3.
* Alignment of 48 pixels * bytes/luma = 128. Q.E.D.
*/
static void initialize(quicktime_video_map_t *vtrack,
quicktime_v210_codec_t *codec, int width, int height)
{
if (codec->initialized != 0)
return;
codec->bytes_per_line = ((((width + 47) / 48) * 48 * 8) / 3);;
codec->buffer_alloc = codec->bytes_per_line * vtrack->track->tkhd.track_height;
if (!codec->buffer)
codec->buffer = malloc(codec->buffer_alloc);
codec->initialized = 1;
}
static int decode(quicktime_t *file, unsigned char **row_pointers, int track)
{
uint32_t i1, i2, i3, i4;
uint8_t *in_ptr, *iptr;
uint16_t * out_y, * out_u, * out_v;
int i, j;
int64_t bytes;
int result = 0;
quicktime_video_map_t *vtrack = &(file->vtracks[track]);
quicktime_v210_codec_t *codec = ((quicktime_codec_t*)vtrack->codec)->priv;
int width = vtrack->track->tkhd.track_width;
int height = vtrack->track->tkhd.track_height;
if (!row_pointers)
{
vtrack->stream_cmodel = BC_YUV422P16;
return 0;
}
initialize(vtrack, codec, width, height);
bytes = lqt_read_video_frame(file, &codec->buffer, &codec->buffer_alloc,
vtrack->current_position, NULL, track);
if(bytes <= 0)
return -1;
in_ptr = codec->buffer;
for (i = 0; i < height; i++, in_ptr += codec->bytes_per_line)
{
out_y = (uint16_t*)(row_pointers[0] + i * file->vtracks[track].stream_row_span);
out_u = (uint16_t*)(row_pointers[1] + i * file->vtracks[track].stream_row_span_uv);
out_v = (uint16_t*)(row_pointers[2] + i * file->vtracks[track].stream_row_span_uv);
/*
* 4 32bit words unpack into 6 pixels. Due to padding (v210 pads lines to
* the nearest 48pixel boundary) the last several pixels can be mingled with
* padding zeroes. For example 1280 is not a multiple of 48 and is padded
* to 1296.
*
* Do as many groups of 6 pixels that do not exceed the (unpadded) width. The
* remaining 2 or 4 pixels will done outside the loop.
*/
for (iptr = in_ptr, j = 0; j < width / 6; j++, iptr += 16)
{
/* v210 is LITTLE endian!! */
i1 = iptr[0] | (iptr[1] << 8) | (iptr[2] << 16) | (iptr[3] << 24);
i2 = iptr[4] | (iptr[5] << 8) | (iptr[6] << 16) | (iptr[7] << 24);
i3 = iptr[8] | (iptr[9] << 8) | (iptr[10] << 16) | (iptr[11] << 24);
i4 = iptr[12] | (iptr[13] << 8) | (iptr[14] << 16) | (iptr[15] << 24);
/* These are grouped to show the "pixel pairs" of 4:2:2 */
*(out_u++) = (i1 & 0x3ff) << 6; /* Cb0 */
*(out_y++) = (i1 & 0xffc00) >> 4; /* Y0 */
*(out_v++) = (i1 & 0x3ff00000) >> 14; /* Cr0 */
*(out_y++) = (i2 & 0x3ff) << 6; /* Y1 */
*(out_u++) = (i2 & 0xffc00) >> 4; /* Cb1 */
*(out_y++) = (i2 & 0x3ff00000) >> 14; /* Y2 */
*(out_v++) = (i3 & 0x3ff) << 6; /* Cr1 */
*(out_y++) = (i3 & 0xffc00) >> 4; /* Y3 */
*(out_u++) = (i3 & 0x3ff00000) >> 14; /* Cb2 */
*(out_y++) = (i4 & 0x3ff) << 6; /* Y4 */
*(out_v++) = (i4 & 0xffc00) >> 4; /* Cr2 */
*(out_y++) = (i4 & 0x3ff00000) >> 14; /* Y5 */
}
/* Handle the 2 or 4 pixels possibly remaining */
j = (width - ((width / 6) * 6));
if (j != 0)
{
i1 = iptr[0] | (iptr[1] << 8) | (iptr[2] << 16) | (iptr[3] << 24);
i2 = iptr[4] | (iptr[5] << 8) | (iptr[6] << 16) | (iptr[7] << 24);
i3 = iptr[8] | (iptr[9] << 8) | (iptr[10] << 16) | (iptr[11] << 24);
i4 = iptr[12] | (iptr[13] << 8) | (iptr[14] << 16) | (iptr[15] << 24);
*(out_u++) = (i1 & 0x3ff) << 6; /* Cb0 */
*(out_y++) = (i1 & 0xffc00) >> 4; /* Y0 */
*(out_v++) = (i1 & 0x3ff00000) >> 14; /* Cr0 */
*(out_y++) = (i2 & 0x3ff) << 6; /* Y1 */
if (j == 4)
{
*(out_u++) = (i2 & 0xffc00) >> 4; /* Cb1 */
*(out_y++) = (i2 & 0x3ff00000) >> 14; /* Y2 */
*(out_v++) = (i3 & 0x3ff) << 6; /* Cr1 */
*(out_y++) = (i3 & 0xffc00) >> 4; /* Y3 */
}
}
}
return result;
}
static int encode(quicktime_t *file, unsigned char **row_pointers, int track)
{
quicktime_video_map_t *vtrack = &(file->vtracks[track]);
quicktime_v210_codec_t *codec = ((quicktime_codec_t*)vtrack->codec)->priv;
quicktime_trak_t *trak = vtrack->track;
int width = vtrack->track->tkhd.track_width;
int height = vtrack->track->tkhd.track_height;
int result = 0;
int i, j;
quicktime_atom_t chunk_atom;
uint16_t * in_y, * in_u, * in_v;
uint8_t *out_ptr, *optr;
uint32_t o1, o2, o3 = 0, o4;
if (!row_pointers)
{
vtrack->stream_cmodel = BC_YUV422P16;
return 0;
}
if(!codec->initialized)
lqt_set_fiel_uncompressed(file, track);
initialize(vtrack, codec, width, height);
out_ptr = codec->buffer;
for (i = 0; i < height; i++, out_ptr += codec->bytes_per_line)
{
in_y = (uint16_t*)(row_pointers[0] + i * file->vtracks[track].stream_row_span);
in_u = (uint16_t*)(row_pointers[1] + i * file->vtracks[track].stream_row_span_uv);
in_v = (uint16_t*)(row_pointers[2] + i * file->vtracks[track].stream_row_span_uv);
/*
* 12 values (6 pixels = 2 Y', 1 Cb/u and 1 Cr/v) pack into 4 32bit words.
*/
optr = out_ptr;
for (j = 0; j < width / 6; j++)
{
o1 = ((*in_v & 0xffc0) << 14) | /* Cr0 */
((*in_y & 0xffc0) << 4) | /* Y0 */
((*in_u & 0xffc0) >> 6); /* Cb0 */
in_y++; in_u++; in_v++;
o2 = ((in_y[1] & 0xffc0) << 14) | /* Y2 */
((*in_u & 0xffc0) << 4) | /* Cb1 */
((in_y[0] & 0xffc0) >> 6); /* Y1 */
in_y ++; in_u++; in_y++;
o3 = ((*in_u & 0xffc0) << 14) | /* Cb2 */
((*in_y & 0xffc0) << 4) | /* Y3 */
((*in_v & 0xffc0) >> 6); /* Cr1 */
in_u++; in_y++; in_v++;
o4 = ((in_y[1] & 0xffc0) << 14) | /* Y5 */
((*in_v & 0xffc0) << 4) | /* Cr2 */
((in_y[0] & 0xffc0) >> 6); /* Y4 */
in_y++; in_v++; in_y++;
*(optr++) = (o1 & 0xff);
*(optr++) = (o1 & 0xff00) >> 8;
*(optr++) = (o1 & 0xff0000) >> 16;
*(optr++) = (o1 & 0xff000000) >> 24;
*(optr++) = (o2 & 0xff);
*(optr++) = (o2 & 0xff00) >> 8;
*(optr++) = (o2 & 0xff0000) >> 16;
*(optr++) = (o2 & 0xff000000) >> 24;
*(optr++) = (o3 & 0xff);
*(optr++) = (o3 & 0xff00) >> 8;
*(optr++) = (o3 & 0xff0000) >> 16;
*(optr++) = (o3 & 0xff000000) >> 24;
*(optr++) = (o4 & 0xff);
*(optr++) = (o4 & 0xff00) >> 8;
*(optr++) = (o4 & 0xff0000) >> 16;
*(optr++) = (o4 & 0xff000000) >> 24;
}
/* Handle the 2 or 4 pixels remaining before the padding */
j = (width - ((width / 6) * 6));
if (j != 0)
{
o1 = ((*in_v & 0xffc0) << 14) | /* Cr0 */
((*in_y & 0xffc0) << 4) | /* Y0 */
((*in_u & 0xffc0) >> 6); /* Cb0 */
in_y++; in_u++; in_v++;
o2 = (*in_y & 0xffc0) >> 6; /* Y1 */
in_y++;
if (j == 4)
{
o2 |= (((in_y[1] & 0xffc0) << 14) | /* Y2 */
((*in_u & 0xffc0) << 4)); /* Cb1 */
in_y ++; in_u++;
o3 = ((*in_y & 0xffc0) << 4) | /* Y3 */
((*in_v & 0xffc0) >> 6); /* Cr1 */
in_y++; in_v++;
}
*(optr++) = (o1 & 0xff);
*(optr++) = (o1 & 0xff00) >> 8;
*(optr++) = (o1 & 0xff0000) >> 16;
*(optr++) = (o1 & 0xff000000) >> 24;
*(optr++) = (o2 & 0xff);
*(optr++) = (o2 & 0xff00) >> 8;
*(optr++) = (o2 & 0xff0000) >> 16;
*(optr++) = (o2 & 0xff000000) >> 24;
*(optr++) = (o3 & 0xff);
*(optr++) = (o3 & 0xff00) >> 8;
*(optr++) = (o3 & 0xff0000) >> 16;
*(optr++) = (o3 & 0xff000000) >> 24;
/*
* The above are sufficient for 2 or 4 pixels, the 4th word (which would be o4)
* contains the two Y' samples (Y4 and Y5) and the Cr (Cr2) for pixels 5 and 6.
* We don't need Y4/Y5/Cr2 so don't put any more bytes into the out buffer.
*/
}
/*
* Now compute the number of bytes used in the current line. Zero pad until
* the padded width is reached. If the line does not require padding (for
* 720xN) then the number of bytes used will be equal to bytes_per_line and
* no padding will be performed.
*/
j = optr - out_ptr;
while (j++ < codec->bytes_per_line)
*(optr++) = '\0';
}
quicktime_write_chunk_header(file, trak, &chunk_atom);
result = !quicktime_write_data(file,
codec->buffer,
codec->bytes_per_line * height);
quicktime_write_chunk_footer(file,
trak,
vtrack->current_chunk,&chunk_atom,
1);
vtrack->current_chunk++;
return result;
}
void quicktime_init_codec_v210(quicktime_video_map_t *vtrack)
{
quicktime_codec_t *codec_base = (quicktime_codec_t*)vtrack->codec;
/* Init public items */
codec_base->priv = calloc(1, sizeof(quicktime_v210_codec_t));
codec_base->delete_vcodec = delete_codec;
codec_base->decode_video = decode;
codec_base->encode_video = encode;
codec_base->decode_audio = 0;
codec_base->encode_audio = 0;
}
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