gstreamer/ext/tarkin/info.c
Thomas Vander Stichele 4fd57bbe3f don't mix tabs and spaces
Original commit message from CVS:
don't mix tabs and spaces
2004-03-15 19:32:27 +00:00

621 lines
16 KiB
C

/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
********************************************************************
function: maintain the info structure, info <-> header packets
last mod: $Id$
********************************************************************/
/* general handling of the header and the TarkinInfo structure (and
substructures) */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <ogg/ogg.h>
#include "tarkin.h"
#include "yuv.h"
#include "mem.h"
/* helpers */
static void
_v_writestring (oggpack_buffer * o, char *s, int bytes)
{
while (bytes--) {
oggpack_write (o, *s++, 8);
}
}
static void
_v_readstring (oggpack_buffer * o, char *buf, int bytes)
{
while (bytes--) {
*buf++ = oggpack_read (o, 8);
}
}
void
tarkin_comment_init (TarkinComment * vc)
{
memset (vc, 0, sizeof (*vc));
}
void
tarkin_comment_add (TarkinComment * vc, char *comment)
{
vc->user_comments = REALLOC (vc->user_comments,
(vc->comments + 2) * sizeof (*vc->user_comments));
vc->comment_lengths = REALLOC (vc->comment_lengths,
(vc->comments + 2) * sizeof (*vc->comment_lengths));
vc->comment_lengths[vc->comments] = strlen (comment);
vc->user_comments[vc->comments] =
MALLOC (vc->comment_lengths[vc->comments] + 1);
strcpy (vc->user_comments[vc->comments], comment);
vc->comments++;
vc->user_comments[vc->comments] = NULL;
}
void
tarkin_comment_add_tag (TarkinComment * vc, char *tag, char *contents)
{
char *comment = alloca (strlen (tag) + strlen (contents) + 2); /* +2 for = and \0 */
strcpy (comment, tag);
strcat (comment, "=");
strcat (comment, contents);
tarkin_comment_add (vc, comment);
}
/* This is more or less the same as strncasecmp - but that doesn't exist
* everywhere, and this is a fairly trivial function, so we include it */
static int
tagcompare (const char *s1, const char *s2, int n)
{
int c = 0;
while (c < n) {
if (toupper (s1[c]) != toupper (s2[c]))
return !0;
c++;
}
return 0;
}
char *
tarkin_comment_query (TarkinComment * vc, char *tag, int count)
{
long i;
int found = 0;
int taglen = strlen (tag) + 1; /* +1 for the = we append */
char *fulltag = alloca (taglen + 1);
strcpy (fulltag, tag);
strcat (fulltag, "=");
for (i = 0; i < vc->comments; i++) {
if (!tagcompare (vc->user_comments[i], fulltag, taglen)) {
if (count == found)
/* We return a pointer to the data, not a copy */
return vc->user_comments[i] + taglen;
else
found++;
}
}
return NULL; /* didn't find anything */
}
int
tarkin_comment_query_count (TarkinComment * vc, char *tag)
{
int i, count = 0;
int taglen = strlen (tag) + 1; /* +1 for the = we append */
char *fulltag = alloca (taglen + 1);
strcpy (fulltag, tag);
strcat (fulltag, "=");
for (i = 0; i < vc->comments; i++) {
if (!tagcompare (vc->user_comments[i], fulltag, taglen))
count++;
}
return count;
}
void
tarkin_comment_clear (TarkinComment * vc)
{
if (vc) {
long i;
for (i = 0; i < vc->comments; i++)
if (vc->user_comments[i])
FREE (vc->user_comments[i]);
if (vc->user_comments)
FREE (vc->user_comments);
if (vc->comment_lengths)
FREE (vc->comment_lengths);
if (vc->vendor)
FREE (vc->vendor);
}
memset (vc, 0, sizeof (*vc));
}
/* used by synthesis, which has a full, alloced vi */
void
tarkin_info_init (TarkinInfo * vi)
{
memset (vi, 0, sizeof (*vi));
}
void
tarkin_info_clear (TarkinInfo * vi)
{
memset (vi, 0, sizeof (*vi));
}
/* Header packing/unpacking ********************************************/
static int
_tarkin_unpack_info (TarkinInfo * vi, oggpack_buffer * opb)
{
#ifdef DBG_OGG
printf ("dbg_ogg: Decoding Info: ");
#endif
vi->version = oggpack_read (opb, 32);
if (vi->version != 0)
return (-TARKIN_VERSION);
vi->n_layers = oggpack_read (opb, 8);
vi->inter.numerator = oggpack_read (opb, 32);
vi->inter.denominator = oggpack_read (opb, 32);
vi->bitrate_upper = oggpack_read (opb, 32);
vi->bitrate_nominal = oggpack_read (opb, 32);
vi->bitrate_lower = oggpack_read (opb, 32);
#ifdef DBG_OGG
printf (" n_layers %d, interleave: %d/%d, ",
vi->n_layers, vi->inter.numerator, vi->inter.denominator);
#endif
if (vi->inter.numerator < 1)
goto err_out;
if (vi->inter.denominator < 1)
goto err_out;
if (vi->n_layers < 1)
goto err_out;
if (oggpack_read (opb, 1) != 1)
goto err_out; /* EOP check */
#ifdef DBG_OGG
printf ("Success\n");
#endif
return (0);
err_out:
#ifdef DBG_OGG
printf ("Failed\n");
#endif
tarkin_info_clear (vi);
return (-TARKIN_BAD_HEADER);
}
static int
_tarkin_unpack_comment (TarkinComment * vc, oggpack_buffer * opb)
{
int i;
int vendorlen = oggpack_read (opb, 32);
#ifdef DBG_OGG
printf ("dbg_ogg: Decoding comment: ");
#endif
if (vendorlen < 0)
goto err_out;
vc->vendor = _ogg_calloc (vendorlen + 1, 1);
_v_readstring (opb, vc->vendor, vendorlen);
vc->comments = oggpack_read (opb, 32);
if (vc->comments < 0)
goto err_out;
vc->user_comments =
_ogg_calloc (vc->comments + 1, sizeof (*vc->user_comments));
vc->comment_lengths =
_ogg_calloc (vc->comments + 1, sizeof (*vc->comment_lengths));
for (i = 0; i < vc->comments; i++) {
int len = oggpack_read (opb, 32);
if (len < 0)
goto err_out;
vc->comment_lengths[i] = len;
vc->user_comments[i] = _ogg_calloc (len + 1, 1);
_v_readstring (opb, vc->user_comments[i], len);
}
if (oggpack_read (opb, 1) != 1)
goto err_out; /* EOP check */
#ifdef DBG_OGG
printf ("Success, read %d comments\n", vc->comments);
#endif
return (0);
err_out:
#ifdef DBG_OGG
printf ("Failed\n");
#endif
tarkin_comment_clear (vc);
return (-TARKIN_BAD_HEADER);
}
/* the real encoding details are here, currently TarkinVideoLayerDesc. */
static int
_tarkin_unpack_layer_desc (TarkinInfo * vi, oggpack_buffer * opb)
{
int i, j;
vi->layer = CALLOC (vi->n_layers, (sizeof (*vi->layer)));
memset (vi->layer, 0, vi->n_layers * sizeof (*vi->layer));
#ifdef DBG_OGG
printf ("ogg: Decoding layers description: ");
#endif
for (i = 0; i < vi->n_layers; i++) {
TarkinVideoLayer *layer = vi->layer + i;
layer->desc.width = oggpack_read (opb, 32);
layer->desc.height = oggpack_read (opb, 32);
layer->desc.a_moments = oggpack_read (opb, 32);
layer->desc.s_moments = oggpack_read (opb, 32);
layer->desc.frames_per_buf = oggpack_read (opb, 32);
layer->desc.bitstream_len = oggpack_read (opb, 32);
layer->desc.format = oggpack_read (opb, 32);
switch (layer->desc.format) {
case TARKIN_GRAYSCALE:
layer->n_comp = 1;
layer->color_fwd_xform = grayscale_to_y;
layer->color_inv_xform = y_to_grayscale;
break;
case TARKIN_RGB24:
layer->n_comp = 3;
layer->color_fwd_xform = rgb24_to_yuv;
layer->color_inv_xform = yuv_to_rgb24;
break;
case TARKIN_RGB32:
layer->n_comp = 3;
layer->color_fwd_xform = rgb32_to_yuv;
layer->color_inv_xform = yuv_to_rgb32;
break;
case TARKIN_RGBA:
layer->n_comp = 4;
layer->color_fwd_xform = rgba_to_yuv;
layer->color_inv_xform = yuv_to_rgba;
break;
default:
return -TARKIN_INVALID_COLOR_FORMAT;
};
layer->waveletbuf = (Wavelet3DBuf **) CALLOC (layer->n_comp,
sizeof (Wavelet3DBuf *));
layer->packet = MALLOC (layer->n_comp * sizeof (*layer->packet));
memset (layer->packet, 0, layer->n_comp * sizeof (*layer->packet));
for (j = 0; j < layer->n_comp; j++) {
layer->waveletbuf[j] = wavelet_3d_buf_new (layer->desc.width,
layer->desc.height, layer->desc.frames_per_buf);
layer->packet[j].data = MALLOC (layer->desc.bitstream_len);
layer->packet[j].storage = layer->desc.bitstream_len;
}
vi->max_bitstream_len += layer->desc.bitstream_len + 2 * 10 * sizeof (uint32_t) * layer->n_comp; /* truncation tables */
#ifdef DBG_OGG
printf
("\n layer%d: size %dx%dx%d, format %d, a_m %d, s_m %d, %d fpb\n",
i, layer->desc.width, layer->desc.height, layer->n_comp,
layer->desc.format, layer->desc.a_moments, layer->desc.s_moments,
layer->desc.frames_per_buf);
#endif
} /* for each layer */
if (oggpack_read (opb, 1) != 1)
goto err_out; /* EOP check */
#ifdef DBG_OGG
printf ("Success\n");
#endif
return (0);
err_out:
#ifdef DBG_OGG
printf ("Failed\n");
#endif
tarkin_info_clear (vi);
return (-TARKIN_BAD_HEADER);
}
/* The Tarkin header is in three packets; the initial small packet in
the first page that identifies basic parameters, a second packet
with bitstream comments and a third packet that holds the
layer description structures. */
TarkinError
tarkin_synthesis_headerin (TarkinInfo * vi, TarkinComment * vc, ogg_packet * op)
{
oggpack_buffer opb;
if (op) {
oggpack_readinit (&opb, op->packet, op->bytes);
/* Which of the three types of header is this? */
/* Also verify header-ness, tarkin */
{
char buffer[6];
int packtype = oggpack_read (&opb, 8);
memset (buffer, 0, 6);
_v_readstring (&opb, buffer, 6);
if (memcmp (buffer, "tarkin", 6)) {
/* not a tarkin header */
return (-TARKIN_NOT_TARKIN);
}
switch (packtype) {
case 0x01: /* least significant *bit* is read first */
if (!op->b_o_s) {
/* Not the initial packet */
return (-TARKIN_BAD_HEADER);
}
if (vi->inter.numerator != 0) {
/* previously initialized info header */
return (-TARKIN_BAD_HEADER);
}
return (_tarkin_unpack_info (vi, &opb));
case 0x03: /* least significant *bit* is read first */
if (vi->inter.denominator == 0) {
/* um... we didn't get the initial header */
return (-TARKIN_BAD_HEADER);
}
return (_tarkin_unpack_comment (vc, &opb));
case 0x05: /* least significant *bit* is read first */
if (vi->inter.numerator == 0 || vc->vendor == NULL) {
/* um... we didn;t get the initial header or comments yet */
return (-TARKIN_BAD_HEADER);
}
return (_tarkin_unpack_layer_desc (vi, &opb));
default:
/* Not a valid tarkin header type */
return (-TARKIN_BAD_HEADER);
break;
}
}
}
return (-TARKIN_BAD_HEADER);
}
/* pack side **********************************************************/
static int
_tarkin_pack_info (oggpack_buffer * opb, TarkinInfo * vi)
{
/* preamble */
oggpack_write (opb, 0x01, 8);
_v_writestring (opb, "tarkin", 6);
/* basic information about the stream */
oggpack_write (opb, 0x00, 32);
oggpack_write (opb, vi->n_layers, 8);
oggpack_write (opb, vi->inter.numerator, 32);
oggpack_write (opb, vi->inter.denominator, 32);
oggpack_write (opb, vi->bitrate_upper, 32);
oggpack_write (opb, vi->bitrate_nominal, 32);
oggpack_write (opb, vi->bitrate_lower, 32);
oggpack_write (opb, 1, 1);
#ifdef DBG_OGG
printf ("dbg_ogg: Putting out info, inter %d/%d, n_layers %d\n",
vi->inter.numerator, vi->inter.denominator, vi->n_layers);
#endif
return (0);
}
static int
_tarkin_pack_comment (oggpack_buffer * opb, TarkinComment * vc)
{
char temp[] = "libTarkin debugging edition 20011104";
int bytes = strlen (temp);
/* preamble */
oggpack_write (opb, 0x03, 8);
_v_writestring (opb, "tarkin", 6);
/* vendor */
oggpack_write (opb, bytes, 32);
_v_writestring (opb, temp, bytes);
/* comments */
oggpack_write (opb, vc->comments, 32);
if (vc->comments) {
int i;
for (i = 0; i < vc->comments; i++) {
if (vc->user_comments[i]) {
oggpack_write (opb, vc->comment_lengths[i], 32);
_v_writestring (opb, vc->user_comments[i], vc->comment_lengths[i]);
} else {
oggpack_write (opb, 0, 32);
}
}
}
oggpack_write (opb, 1, 1);
#ifdef DBG_OGG
printf ("dbg_ogg: Putting out %d comments\n", vc->comments);
#endif
return (0);
}
static int
_tarkin_pack_layer_desc (oggpack_buffer * opb, TarkinInfo * vi)
{
int i;
TarkinVideoLayer *layer;
#ifdef DBG_OGG
printf ("dbg_ogg: Putting out layers description:\n");
#endif
oggpack_write (opb, 0x05, 8);
_v_writestring (opb, "tarkin", 6);
for (i = 0; i < vi->n_layers; i++) {
layer = vi->layer + i;
oggpack_write (opb, layer->desc.width, 32);
oggpack_write (opb, layer->desc.height, 32);
oggpack_write (opb, layer->desc.a_moments, 32);
oggpack_write (opb, layer->desc.s_moments, 32);
oggpack_write (opb, layer->desc.frames_per_buf, 32);
oggpack_write (opb, layer->desc.bitstream_len, 32);
oggpack_write (opb, layer->desc.format, 32);
#ifdef DBG_OGG
printf (" res. %dx%d, format %d, a_m %d, s_m %d, fpb %d\n",
layer->desc.width, layer->desc.height, layer->desc.format,
layer->desc.a_moments, layer->desc.s_moments,
layer->desc.frames_per_buf);
#endif
}
oggpack_write (opb, 1, 1);
#ifdef DBG_OGG
printf (" wrote %ld bytes.\n", oggpack_bytes (opb));
#endif
return (0);
}
int
tarkin_comment_header_out (TarkinComment * vc, ogg_packet * op)
{
oggpack_buffer opb;
oggpack_writeinit (&opb);
if (_tarkin_pack_comment (&opb, vc))
return -TARKIN_NOT_IMPLEMENTED;
op->packet = MALLOC (oggpack_bytes (&opb));
memcpy (op->packet, opb.buffer, oggpack_bytes (&opb));
op->bytes = oggpack_bytes (&opb);
op->b_o_s = 0;
op->e_o_s = 0;
op->granulepos = 0;
return 0;
}
TarkinError
tarkin_analysis_headerout (TarkinStream * v,
TarkinComment * vc,
ogg_packet * op, ogg_packet * op_comm, ogg_packet * op_code)
{
int ret = -TARKIN_NOT_IMPLEMENTED;
TarkinInfo *vi;
oggpack_buffer opb;
tarkin_header_store *b = &v->headers;
vi = v->ti;
/* first header packet ********************************************* */
oggpack_writeinit (&opb);
if (_tarkin_pack_info (&opb, vi))
goto err_out;
/* build the packet */
if (b->header)
FREE (b->header);
b->header = MALLOC (oggpack_bytes (&opb));
memcpy (b->header, opb.buffer, oggpack_bytes (&opb));
op->packet = b->header;
op->bytes = oggpack_bytes (&opb);
op->b_o_s = 1;
op->e_o_s = 0;
op->granulepos = 0;
/* second header packet (comments) ********************************* */
oggpack_reset (&opb);
if (_tarkin_pack_comment (&opb, vc))
goto err_out;
if (b->header1)
FREE (b->header1);
b->header1 = MALLOC (oggpack_bytes (&opb));
memcpy (b->header1, opb.buffer, oggpack_bytes (&opb));
op_comm->packet = b->header1;
op_comm->bytes = oggpack_bytes (&opb);
op_comm->b_o_s = 0;
op_comm->e_o_s = 0;
op_comm->granulepos = 0;
/* third header packet (modes/codebooks) *************************** */
oggpack_reset (&opb);
if (_tarkin_pack_layer_desc (&opb, vi))
goto err_out;
if (b->header2)
FREE (b->header2);
b->header2 = MALLOC (oggpack_bytes (&opb));
memcpy (b->header2, opb.buffer, oggpack_bytes (&opb));
op_code->packet = b->header2;
op_code->bytes = oggpack_bytes (&opb);
op_code->b_o_s = 0;
op_code->e_o_s = 0;
op_code->granulepos = 0;
oggpack_writeclear (&opb);
return (0);
err_out:
oggpack_writeclear (&opb);
memset (op, 0, sizeof (*op));
memset (op_comm, 0, sizeof (*op_comm));
memset (op_code, 0, sizeof (*op_code));
if (b->header)
FREE (b->header);
if (b->header1)
FREE (b->header1);
if (b->header2)
FREE (b->header2);
b->header = NULL;
b->header1 = NULL;
b->header2 = NULL;
return (ret);
}