* Based on code from the OggTheora software codec source code,
* Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
*/
+#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
int file_error;
size_t len = 0;
do {
- const size_t n = fread((uint8_t*)buf + len, 1, size - len, file);
+ const size_t n = fread((uint8_t *)buf + len, 1, size - len, file);
len += n;
file_error = ferror(file);
if (file_error) {
} while (!feof(file) && len < size && ++retry_count < kMaxRetries);
if (!feof(file) && len != size) {
- fprintf(stderr, "Error reading file: %u of %u bytes read,"
- " error: %d, retries: %d, %d: %s\n",
- (uint32_t)len, (uint32_t)size, file_error, retry_count,
- errno, strerror(errno));
+ fprintf(stderr,
+ "Error reading file: %u of %u bytes read,"
+ " error: %d, retries: %d, %d: %s\n",
+ (uint32_t)len, (uint32_t)size, file_error, retry_count, errno,
+ strerror(errno));
}
return len == size;
}
static int y4m_parse_tags(y4m_input *_y4m, char *_tags) {
- int got_w;
- int got_h;
- int got_fps;
- int got_interlace;
- int got_par;
- int got_chroma;
char *p;
char *q;
- got_w = got_h = got_fps = got_interlace = got_par = got_chroma = 0;
for (p = _tags;; p = q) {
/*Skip any leading spaces.*/
- while (*p == ' ')p++;
+ while (*p == ' ') p++;
/*If that's all we have, stop.*/
- if (p[0] == '\0')break;
+ if (p[0] == '\0') break;
/*Find the end of this tag.*/
- for (q = p + 1; *q != '\0' && *q != ' '; q++);
+ for (q = p + 1; *q != '\0' && *q != ' '; q++) {
+ }
/*Process the tag.*/
switch (p[0]) {
case 'W': {
- if (sscanf(p + 1, "%d", &_y4m->pic_w) != 1)return -1;
- got_w = 1;
+ if (sscanf(p + 1, "%d", &_y4m->pic_w) != 1) return -1;
+ break;
}
- break;
case 'H': {
- if (sscanf(p + 1, "%d", &_y4m->pic_h) != 1)return -1;
- got_h = 1;
+ if (sscanf(p + 1, "%d", &_y4m->pic_h) != 1) return -1;
+ break;
}
- break;
case 'F': {
if (sscanf(p + 1, "%d:%d", &_y4m->fps_n, &_y4m->fps_d) != 2) {
return -1;
}
- got_fps = 1;
+ break;
}
- break;
case 'I': {
_y4m->interlace = p[1];
- got_interlace = 1;
+ break;
}
- break;
case 'A': {
if (sscanf(p + 1, "%d:%d", &_y4m->par_n, &_y4m->par_d) != 2) {
return -1;
}
- got_par = 1;
+ break;
}
- break;
case 'C': {
- if (q - p > 16)return -1;
+ if (q - p > 16) return -1;
memcpy(_y4m->chroma_type, p + 1, q - p - 1);
_y4m->chroma_type[q - p - 1] = '\0';
- got_chroma = 1;
+ break;
}
- break;
- /*Ignore unknown tags.*/
+ /*Ignore unknown tags.*/
}
}
- if (!got_w || !got_h || !got_fps)return -1;
- if (!got_interlace)_y4m->interlace = '?';
- if (!got_par)_y4m->par_n = _y4m->par_d = 0;
- /*Chroma-type is not specified in older files, e.g., those generated by
- mplayer.*/
- if (!got_chroma)strcpy(_y4m->chroma_type, "420");
return 0;
}
+// Copy a single tag into the buffer, along with a null character.
+// Returns 0 if any file IO errors occur.
+static int copy_tag(char *buf, size_t buf_len, char *end_tag, FILE *file) {
+ size_t i;
+ assert(buf_len >= 1);
+ // Skip leading space characters.
+ do {
+ if (!file_read(buf, 1, file)) {
+ return 0;
+ }
+ } while (buf[0] == ' ');
+ // If we hit the newline, treat this as the "empty" tag.
+ if (buf[0] == '\n') {
+ buf[0] = '\0';
+ *end_tag = '\n';
+ return 1;
+ }
+
+ // Copy over characters until a space is hit, or the buffer is exhausted.
+ for (i = 1; i < buf_len; ++i) {
+ if (!file_read(buf + i, 1, file)) {
+ return 0;
+ }
+ if (buf[i] == ' ' || buf[i] == '\n') {
+ break;
+ }
+ }
+ if (i == buf_len) {
+ fprintf(stderr, "Error: Y4M header tags must be less than %lu characters\n",
+ (unsigned long)i);
+ return 0;
+ }
+ *end_tag = buf[i];
+ buf[i] = '\0';
+ return 1;
+}
+
+/* Returns 1 if tags were parsed successfully, 0 otherwise. */
+static int parse_tags(y4m_input *y4m_ctx, FILE *file) {
+ char tag[256];
+ char end; /* Character denoting the end of the tag, ' ' or '\n'. */
+ /* Set Y4M tags to defaults, updating them as processing occurs. Mandatory
+ fields are marked with -1 and will be checked after the tags are parsed. */
+ y4m_ctx->pic_w = -1;
+ y4m_ctx->pic_h = -1;
+ y4m_ctx->fps_n = -1; /* Also serves as marker for fps_d */
+ y4m_ctx->par_n = 0;
+ y4m_ctx->par_d = 0;
+ y4m_ctx->interlace = '?';
+ snprintf(y4m_ctx->chroma_type, sizeof(y4m_ctx->chroma_type), "420");
+
+ /* Find one tag at a time. */
+ do {
+ if (!copy_tag(tag, sizeof(tag), &end, file)) {
+ return 0;
+ }
+ /* y4m_parse_tags returns 0 on success. */
+ if (y4m_parse_tags(y4m_ctx, tag)) {
+ return 0;
+ }
+ } while (end != '\n');
+
+ /* Check the mandatory fields. */
+ if (y4m_ctx->pic_w == -1) {
+ fprintf(stderr, "Width field missing\n");
+ return 0;
+ }
+ if (y4m_ctx->pic_h == -1) {
+ fprintf(stderr, "Height field missing\n");
+ return 0;
+ }
+ if (y4m_ctx->fps_n == -1) {
+ fprintf(stderr, "FPS field missing\n");
+ return 0;
+ }
+ return 1;
+}
/*All anti-aliasing filters in the following conversion functions are based on
one of two window functions:
The number of taps is intentionally kept small to reduce computational
overhead and limit ringing.
- The taps from these filters are scaled so that their sum is 1, and the result
- is scaled by 128 and rounded to integers to create a filter whose
+ The taps from these filters are scaled so that their sum is 1, and the
+ result is scaled by 128 and rounded to integers to create a filter whose
intermediate values fit inside 16 bits.
Coefficients are rounded in such a way as to ensure their sum is still 128,
which is usually equivalent to normal rounding.
Conversions which require both horizontal and vertical filtering could
have these steps pipelined, for less memory consumption and better cache
performance, but we do them separately for simplicity.*/
-
-#define OC_MINI(_a,_b) ((_a)>(_b)?(_b):(_a))
-#define OC_MAXI(_a,_b) ((_a)<(_b)?(_b):(_a))
-#define OC_CLAMPI(_a,_b,_c) (OC_MAXI(_a,OC_MINI(_b,_c)))
+#define OC_MINI(_a, _b) ((_a) > (_b) ? (_b) : (_a))
+#define OC_MAXI(_a, _b) ((_a) < (_b) ? (_b) : (_a))
+#define OC_CLAMPI(_a, _b, _c) (OC_MAXI(_a, OC_MINI(_b, _c)))
/*420jpeg chroma samples are sited like:
Y-------Y-------Y-------Y-------
lines, and they are vertically co-sited with the luma samples in both the
mpeg2 and jpeg cases (thus requiring no vertical resampling).*/
static void y4m_42xmpeg2_42xjpeg_helper(unsigned char *_dst,
- const unsigned char *_src, int _c_w, int _c_h) {
+ const unsigned char *_src, int _c_w,
+ int _c_h) {
int y;
int x;
for (y = 0; y < _c_h; y++) {
/*Filter: [4 -17 114 35 -9 1]/128, derived from a 6-tap Lanczos
window.*/
for (x = 0; x < OC_MINI(_c_w, 2); x++) {
- _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[0] - 17 * _src[OC_MAXI(x - 1, 0)] +
- 114 * _src[x] + 35 * _src[OC_MINI(x + 1, _c_w - 1)] - 9 * _src[OC_MINI(x + 2, _c_w - 1)] +
- _src[OC_MINI(x + 3, _c_w - 1)] + 64) >> 7, 255);
+ _dst[x] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * _src[0] - 17 * _src[OC_MAXI(x - 1, 0)] + 114 * _src[x] +
+ 35 * _src[OC_MINI(x + 1, _c_w - 1)] -
+ 9 * _src[OC_MINI(x + 2, _c_w - 1)] + _src[OC_MINI(x + 3, _c_w - 1)] +
+ 64) >>
+ 7,
+ 255);
}
for (; x < _c_w - 3; x++) {
- _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[x - 2] - 17 * _src[x - 1] +
- 114 * _src[x] + 35 * _src[x + 1] - 9 * _src[x + 2] + _src[x + 3] + 64) >> 7, 255);
+ _dst[x] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * _src[x - 2] - 17 * _src[x - 1] + 114 * _src[x] +
+ 35 * _src[x + 1] - 9 * _src[x + 2] + _src[x + 3] + 64) >>
+ 7,
+ 255);
}
for (; x < _c_w; x++) {
- _dst[x] = (unsigned char)OC_CLAMPI(0, (4 * _src[x - 2] - 17 * _src[x - 1] +
- 114 * _src[x] + 35 * _src[OC_MINI(x + 1, _c_w - 1)] - 9 * _src[OC_MINI(x + 2, _c_w - 1)] +
- _src[_c_w - 1] + 64) >> 7, 255);
+ _dst[x] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * _src[x - 2] - 17 * _src[x - 1] + 114 * _src[x] +
+ 35 * _src[OC_MINI(x + 1, _c_w - 1)] -
+ 9 * _src[OC_MINI(x + 2, _c_w - 1)] + _src[_c_w - 1] + 64) >>
+ 7,
+ 255);
}
_dst += _c_w;
_src += _c_w;
}
}
-/*Handles both 422 and 420mpeg2 to 422jpeg and 420jpeg, respectively.*/
-static void y4m_convert_42xmpeg2_42xjpeg(y4m_input *_y4m, unsigned char *_dst,
- unsigned char *_aux) {
- int c_w;
- int c_h;
- int c_sz;
- int pli;
- /*Skip past the luma data.*/
- _dst += _y4m->pic_w * _y4m->pic_h;
- /*Compute the size of each chroma plane.*/
- c_w = (_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h;
- c_h = (_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v;
- c_sz = c_w * c_h;
- for (pli = 1; pli < 3; pli++) {
- y4m_42xmpeg2_42xjpeg_helper(_dst, _aux, c_w, c_h);
- _dst += c_sz;
- _aux += c_sz;
- }
-}
-
/*This format is only used for interlaced content, but is included for
completeness.
static void y4m_convert_42xpaldv_42xjpeg(y4m_input *_y4m, unsigned char *_dst,
unsigned char *_aux) {
unsigned char *tmp;
- int c_w;
- int c_h;
- int c_sz;
- int pli;
- int y;
- int x;
+ int c_w;
+ int c_h;
+ int c_sz;
+ int pli;
+ int y;
+ int x;
/*Skip past the luma data.*/
_dst += _y4m->pic_w * _y4m->pic_h;
/*Compute the size of each chroma plane.*/
This is the same filter used above, but in the other order.*/
for (x = 0; x < c_w; x++) {
for (y = 0; y < OC_MINI(c_h, 3); y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[0]
- - 9 * tmp[OC_MAXI(y - 2, 0) * c_w] + 35 * tmp[OC_MAXI(y - 1, 0) * c_w]
- + 114 * tmp[y * c_w] - 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w]
- + 4 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (tmp[0] - 9 * tmp[OC_MAXI(y - 2, 0) * c_w] +
+ 35 * tmp[OC_MAXI(y - 1, 0) * c_w] + 114 * tmp[y * c_w] -
+ 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] +
+ 4 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + 64) >>
+ 7,
+ 255);
}
for (; y < c_h - 2; y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[(y - 3) * c_w]
- - 9 * tmp[(y - 2) * c_w] + 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w]
- - 17 * tmp[(y + 1) * c_w] + 4 * tmp[(y + 2) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (tmp[(y - 3) * c_w] - 9 * tmp[(y - 2) * c_w] +
+ 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] -
+ 17 * tmp[(y + 1) * c_w] + 4 * tmp[(y + 2) * c_w] + 64) >>
+ 7,
+ 255);
}
for (; y < c_h; y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (tmp[(y - 3) * c_w]
- - 9 * tmp[(y - 2) * c_w] + 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w]
- - 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] + 4 * tmp[(c_h - 1) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (tmp[(y - 3) * c_w] - 9 * tmp[(y - 2) * c_w] +
+ 35 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] -
+ 17 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] +
+ 4 * tmp[(c_h - 1) * c_w] + 64) >>
+ 7,
+ 255);
}
_dst++;
tmp++;
}
_dst += c_sz - c_w;
tmp -= c_w;
+ break;
}
- break;
case 2: {
/*Slide C_r down a quarter-pel.
This is the same as the horizontal filter.*/
for (x = 0; x < c_w; x++) {
for (y = 0; y < OC_MINI(c_h, 2); y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[0]
- - 17 * tmp[OC_MAXI(y - 1, 0) * c_w] + 114 * tmp[y * c_w]
- + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] - 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w]
- + tmp[OC_MINI(y + 3, c_h - 1) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * tmp[0] - 17 * tmp[OC_MAXI(y - 1, 0) * c_w] +
+ 114 * tmp[y * c_w] + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] -
+ 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] +
+ tmp[OC_MINI(y + 3, c_h - 1) * c_w] + 64) >>
+ 7,
+ 255);
}
for (; y < c_h - 3; y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[(y - 2) * c_w]
- - 17 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] + 35 * tmp[(y + 1) * c_w]
- - 9 * tmp[(y + 2) * c_w] + tmp[(y + 3) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * tmp[(y - 2) * c_w] - 17 * tmp[(y - 1) * c_w] +
+ 114 * tmp[y * c_w] + 35 * tmp[(y + 1) * c_w] -
+ 9 * tmp[(y + 2) * c_w] + tmp[(y + 3) * c_w] + 64) >>
+ 7,
+ 255);
}
for (; y < c_h; y++) {
- _dst[y * c_w] = (unsigned char)OC_CLAMPI(0, (4 * tmp[(y - 2) * c_w]
- - 17 * tmp[(y - 1) * c_w] + 114 * tmp[y * c_w] + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w]
- - 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + tmp[(c_h - 1) * c_w] + 64) >> 7, 255);
+ _dst[y * c_w] = (unsigned char)OC_CLAMPI(
+ 0,
+ (4 * tmp[(y - 2) * c_w] - 17 * tmp[(y - 1) * c_w] +
+ 114 * tmp[y * c_w] + 35 * tmp[OC_MINI(y + 1, c_h - 1) * c_w] -
+ 9 * tmp[OC_MINI(y + 2, c_h - 1) * c_w] + tmp[(c_h - 1) * c_w] +
+ 64) >>
+ 7,
+ 255);
}
_dst++;
tmp++;
}
+ break;
}
- break;
}
/*For actual interlaced material, this would have to be done separately on
each field, and the shift amounts would be different.
/*Perform vertical filtering to reduce a single plane from 4:2:2 to 4:2:0.
This is used as a helper by several converation routines.*/
static void y4m_422jpeg_420jpeg_helper(unsigned char *_dst,
- const unsigned char *_src, int _c_w, int _c_h) {
+ const unsigned char *_src, int _c_w,
+ int _c_h) {
int y;
int x;
/*Filter: [3 -17 78 78 -17 3]/128, derived from a 6-tap Lanczos window.*/
for (x = 0; x < _c_w; x++) {
for (y = 0; y < OC_MINI(_c_h, 2); y += 2) {
- _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (64 * _src[0]
- + 78 * _src[OC_MINI(1, _c_h - 1) * _c_w]
- - 17 * _src[OC_MINI(2, _c_h - 1) * _c_w]
- + 3 * _src[OC_MINI(3, _c_h - 1) * _c_w] + 64) >> 7, 255);
+ _dst[(y >> 1) * _c_w] =
+ OC_CLAMPI(0,
+ (64 * _src[0] + 78 * _src[OC_MINI(1, _c_h - 1) * _c_w] -
+ 17 * _src[OC_MINI(2, _c_h - 1) * _c_w] +
+ 3 * _src[OC_MINI(3, _c_h - 1) * _c_w] + 64) >>
+ 7,
+ 255);
}
for (; y < _c_h - 3; y += 2) {
- _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (3 * (_src[(y - 2) * _c_w] + _src[(y + 3) * _c_w])
- - 17 * (_src[(y - 1) * _c_w] + _src[(y + 2) * _c_w])
- + 78 * (_src[y * _c_w] + _src[(y + 1) * _c_w]) + 64) >> 7, 255);
+ _dst[(y >> 1) * _c_w] =
+ OC_CLAMPI(0,
+ (3 * (_src[(y - 2) * _c_w] + _src[(y + 3) * _c_w]) -
+ 17 * (_src[(y - 1) * _c_w] + _src[(y + 2) * _c_w]) +
+ 78 * (_src[y * _c_w] + _src[(y + 1) * _c_w]) + 64) >>
+ 7,
+ 255);
}
for (; y < _c_h; y += 2) {
- _dst[(y >> 1)*_c_w] = OC_CLAMPI(0, (3 * (_src[(y - 2) * _c_w]
- + _src[(_c_h - 1) * _c_w]) - 17 * (_src[(y - 1) * _c_w]
- + _src[OC_MINI(y + 2, _c_h - 1) * _c_w])
- + 78 * (_src[y * _c_w] + _src[OC_MINI(y + 1, _c_h - 1) * _c_w]) + 64) >> 7, 255);
+ _dst[(y >> 1) * _c_w] = OC_CLAMPI(
+ 0,
+ (3 * (_src[(y - 2) * _c_w] + _src[(_c_h - 1) * _c_w]) -
+ 17 * (_src[(y - 1) * _c_w] + _src[OC_MINI(y + 2, _c_h - 1) * _c_w]) +
+ 78 * (_src[y * _c_w] + _src[OC_MINI(y + 1, _c_h - 1) * _c_w]) +
+ 64) >>
+ 7,
+ 255);
}
_src++;
_dst++;
static void y4m_convert_422_420jpeg(y4m_input *_y4m, unsigned char *_dst,
unsigned char *_aux) {
unsigned char *tmp;
- int c_w;
- int c_h;
- int c_sz;
- int dst_c_h;
- int dst_c_sz;
- int pli;
+ int c_w;
+ int c_h;
+ int c_sz;
+ int dst_c_h;
+ int dst_c_sz;
+ int pli;
/*Skip past the luma data.*/
_dst += _y4m->pic_w * _y4m->pic_h;
/*Compute the size of each chroma plane.*/
static void y4m_convert_411_420jpeg(y4m_input *_y4m, unsigned char *_dst,
unsigned char *_aux) {
unsigned char *tmp;
- int c_w;
- int c_h;
- int c_sz;
- int dst_c_w;
- int dst_c_h;
- int dst_c_sz;
- int tmp_sz;
- int pli;
- int y;
- int x;
+ int c_w;
+ int c_h;
+ int c_sz;
+ int dst_c_w;
+ int dst_c_h;
+ int dst_c_sz;
+ int tmp_sz;
+ int pli;
+ int y;
+ int x;
/*Skip past the luma data.*/
_dst += _y4m->pic_w * _y4m->pic_h;
/*Compute the size of each chroma plane.*/
/*Filters: [1 110 18 -1]/128 and [-3 50 86 -5]/128, both derived from a
4-tap Mitchell window.*/
for (x = 0; x < OC_MINI(c_w, 1); x++) {
- tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (111 * _aux[0]
- + 18 * _aux[OC_MINI(1, c_w - 1)] - _aux[OC_MINI(2, c_w - 1)] + 64) >> 7, 255);
- tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (47 * _aux[0]
- + 86 * _aux[OC_MINI(1, c_w - 1)] - 5 * _aux[OC_MINI(2, c_w - 1)] + 64) >> 7, 255);
+ tmp[x << 1] = (unsigned char)OC_CLAMPI(
+ 0,
+ (111 * _aux[0] + 18 * _aux[OC_MINI(1, c_w - 1)] -
+ _aux[OC_MINI(2, c_w - 1)] + 64) >>
+ 7,
+ 255);
+ tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(
+ 0,
+ (47 * _aux[0] + 86 * _aux[OC_MINI(1, c_w - 1)] -
+ 5 * _aux[OC_MINI(2, c_w - 1)] + 64) >>
+ 7,
+ 255);
}
for (; x < c_w - 2; x++) {
- tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (_aux[x - 1] + 110 * _aux[x]
- + 18 * _aux[x + 1] - _aux[x + 2] + 64) >> 7, 255);
- tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (-3 * _aux[x - 1] + 50 * _aux[x]
- + 86 * _aux[x + 1] - 5 * _aux[x + 2] + 64) >> 7, 255);
+ tmp[x << 1] =
+ (unsigned char)OC_CLAMPI(0,
+ (_aux[x - 1] + 110 * _aux[x] +
+ 18 * _aux[x + 1] - _aux[x + 2] + 64) >>
+ 7,
+ 255);
+ tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(
+ 0,
+ (-3 * _aux[x - 1] + 50 * _aux[x] + 86 * _aux[x + 1] -
+ 5 * _aux[x + 2] + 64) >>
+ 7,
+ 255);
}
for (; x < c_w; x++) {
- tmp[x << 1] = (unsigned char)OC_CLAMPI(0, (_aux[x - 1] + 110 * _aux[x]
- + 18 * _aux[OC_MINI(x + 1, c_w - 1)] - _aux[c_w - 1] + 64) >> 7, 255);
+ tmp[x << 1] = (unsigned char)OC_CLAMPI(
+ 0,
+ (_aux[x - 1] + 110 * _aux[x] + 18 * _aux[OC_MINI(x + 1, c_w - 1)] -
+ _aux[c_w - 1] + 64) >>
+ 7,
+ 255);
if ((x << 1 | 1) < dst_c_w) {
- tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(0, (-3 * _aux[x - 1] + 50 * _aux[x]
- + 86 * _aux[OC_MINI(x + 1, c_w - 1)] - 5 * _aux[c_w - 1] + 64) >> 7, 255);
+ tmp[x << 1 | 1] = (unsigned char)OC_CLAMPI(
+ 0,
+ (-3 * _aux[x - 1] + 50 * _aux[x] +
+ 86 * _aux[OC_MINI(x + 1, c_w - 1)] - 5 * _aux[c_w - 1] + 64) >>
+ 7,
+ 255);
}
}
tmp += dst_c_w;
static void y4m_convert_444_420jpeg(y4m_input *_y4m, unsigned char *_dst,
unsigned char *_aux) {
unsigned char *tmp;
- int c_w;
- int c_h;
- int c_sz;
- int dst_c_w;
- int dst_c_h;
- int dst_c_sz;
- int tmp_sz;
- int pli;
- int y;
- int x;
+ int c_w;
+ int c_h;
+ int c_sz;
+ int dst_c_w;
+ int dst_c_h;
+ int dst_c_sz;
+ int tmp_sz;
+ int pli;
+ int y;
+ int x;
/*Skip past the luma data.*/
_dst += _y4m->pic_w * _y4m->pic_h;
/*Compute the size of each chroma plane.*/
/*Filter: [3 -17 78 78 -17 3]/128, derived from a 6-tap Lanczos window.*/
for (y = 0; y < c_h; y++) {
for (x = 0; x < OC_MINI(c_w, 2); x += 2) {
- tmp[x >> 1] = OC_CLAMPI(0, (64 * _aux[0] + 78 * _aux[OC_MINI(1, c_w - 1)]
- - 17 * _aux[OC_MINI(2, c_w - 1)]
- + 3 * _aux[OC_MINI(3, c_w - 1)] + 64) >> 7, 255);
+ tmp[x >> 1] = OC_CLAMPI(0,
+ (64 * _aux[0] + 78 * _aux[OC_MINI(1, c_w - 1)] -
+ 17 * _aux[OC_MINI(2, c_w - 1)] +
+ 3 * _aux[OC_MINI(3, c_w - 1)] + 64) >>
+ 7,
+ 255);
}
for (; x < c_w - 3; x += 2) {
- tmp[x >> 1] = OC_CLAMPI(0, (3 * (_aux[x - 2] + _aux[x + 3])
- - 17 * (_aux[x - 1] + _aux[x + 2]) + 78 * (_aux[x] + _aux[x + 1]) + 64) >> 7, 255);
+ tmp[x >> 1] = OC_CLAMPI(0,
+ (3 * (_aux[x - 2] + _aux[x + 3]) -
+ 17 * (_aux[x - 1] + _aux[x + 2]) +
+ 78 * (_aux[x] + _aux[x + 1]) + 64) >>
+ 7,
+ 255);
}
for (; x < c_w; x += 2) {
- tmp[x >> 1] = OC_CLAMPI(0, (3 * (_aux[x - 2] + _aux[c_w - 1]) -
- 17 * (_aux[x - 1] + _aux[OC_MINI(x + 2, c_w - 1)]) +
- 78 * (_aux[x] + _aux[OC_MINI(x + 1, c_w - 1)]) + 64) >> 7, 255);
+ tmp[x >> 1] =
+ OC_CLAMPI(0,
+ (3 * (_aux[x - 2] + _aux[c_w - 1]) -
+ 17 * (_aux[x - 1] + _aux[OC_MINI(x + 2, c_w - 1)]) +
+ 78 * (_aux[x] + _aux[OC_MINI(x + 1, c_w - 1)]) + 64) >>
+ 7,
+ 255);
}
tmp += dst_c_w;
_aux += c_w;
(void)_aux;
}
-int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
- int only_420) {
- char buffer[80] = {0};
- int ret;
- int i;
- /*Read until newline, or 80 cols, whichever happens first.*/
- for (i = 0; i < 79; i++) {
- if (_nskip > 0) {
- buffer[i] = *_skip++;
- _nskip--;
- } else {
- if (!file_read(buffer + i, 1, _fin)) return -1;
- }
- if (buffer[i] == '\n')break;
+static const char TAG[] = "YUV4MPEG2";
+
+int y4m_input_open(y4m_input *y4m_ctx, FILE *file, char *skip_buffer,
+ int num_skip, int only_420) {
+ // File must start with |TAG|.
+ char tag_buffer[9]; // 9 == strlen(TAG)
+ // Read as much as possible from |skip_buffer|, which were characters
+ // that were previously read from the file to do input-type detection.
+ assert(num_skip >= 0 && num_skip <= 8);
+ if (num_skip > 0) {
+ memcpy(tag_buffer, skip_buffer, num_skip);
}
- /*We skipped too much header data.*/
- if (_nskip > 0)return -1;
- if (i == 79) {
- fprintf(stderr, "Error parsing header; not a YUV2MPEG2 file?\n");
+ // Start reading from the file now that the |skip_buffer| is depleted.
+ if (!file_read(tag_buffer + num_skip, 9 - num_skip, file)) {
return -1;
}
- buffer[i] = '\0';
- if (memcmp(buffer, "YUV4MPEG", 8)) {
- fprintf(stderr, "Incomplete magic for YUV4MPEG file.\n");
+ if (memcmp(TAG, tag_buffer, 9) != 0) {
+ fprintf(stderr, "Error parsing header: must start with %s\n", TAG);
return -1;
}
- if (buffer[8] != '2') {
- fprintf(stderr, "Incorrect YUV input file version; YUV4MPEG2 required.\n");
+ // Next character must be a space.
+ if (!file_read(tag_buffer, 1, file) || tag_buffer[0] != ' ') {
+ fprintf(stderr, "Error parsing header: space must follow %s\n", TAG);
+ return -1;
}
- ret = y4m_parse_tags(_y4m, buffer + 5);
- if (ret < 0) {
- fprintf(stderr, "Error parsing YUV4MPEG2 header.\n");
- return ret;
+ if (!parse_tags(y4m_ctx, file)) {
+ fprintf(stderr, "Error parsing %s header.\n", TAG);
}
- if (_y4m->interlace == '?') {
- fprintf(stderr, "Warning: Input video interlacing format unknown; "
+ if (y4m_ctx->interlace == '?') {
+ fprintf(stderr,
+ "Warning: Input video interlacing format unknown; "
"assuming progressive scan.\n");
- } else if (_y4m->interlace != 'p') {
- fprintf(stderr, "Input video is interlaced; "
+ } else if (y4m_ctx->interlace != 'p') {
+ fprintf(stderr,
+ "Input video is interlaced; "
"Only progressive scan handled.\n");
return -1;
}
- _y4m->vpx_fmt = VPX_IMG_FMT_I420;
- _y4m->bps = 12;
- _y4m->bit_depth = 8;
- if (strcmp(_y4m->chroma_type, "420") == 0 ||
- strcmp(_y4m->chroma_type, "420jpeg") == 0) {
- _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h
- + 2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I420;
+ y4m_ctx->bps = 12;
+ y4m_ctx->bit_depth = 8;
+ y4m_ctx->aux_buf = NULL;
+ y4m_ctx->dst_buf = NULL;
+ if (strcmp(y4m_ctx->chroma_type, "420") == 0 ||
+ strcmp(y4m_ctx->chroma_type, "420jpeg") == 0 ||
+ strcmp(y4m_ctx->chroma_type, "420mpeg2") == 0) {
+ y4m_ctx->src_c_dec_h = y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_v =
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz =
+ y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * ((y4m_ctx->pic_h + 1) / 2);
/* Natively supported: no conversion required. */
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
- } else if (strcmp(_y4m->chroma_type, "420p10") == 0) {
- _y4m->src_c_dec_h = 2;
- _y4m->dst_c_dec_h = 2;
- _y4m->src_c_dec_v = 2;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = 2 * (_y4m->pic_w * _y4m->pic_h +
- 2 * ((_y4m->pic_w + 1) / 2) *
- ((_y4m->pic_h + 1) / 2));
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
+ } else if (strcmp(y4m_ctx->chroma_type, "420p10") == 0) {
+ y4m_ctx->src_c_dec_h = 2;
+ y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 2;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz =
+ 2 * (y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * ((y4m_ctx->pic_h + 1) / 2));
/* Natively supported: no conversion required. */
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
- _y4m->bit_depth = 10;
- _y4m->bps = 15;
- _y4m->vpx_fmt = VPX_IMG_FMT_I42016;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
+ y4m_ctx->bit_depth = 10;
+ y4m_ctx->bps = 15;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I42016;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 420p10 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "420p12") == 0) {
- _y4m->src_c_dec_h = 2;
- _y4m->dst_c_dec_h = 2;
- _y4m->src_c_dec_v = 2;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = 2 * (_y4m->pic_w * _y4m->pic_h +
- 2 * ((_y4m->pic_w + 1) / 2) *
- ((_y4m->pic_h + 1) / 2));
+ } else if (strcmp(y4m_ctx->chroma_type, "420p12") == 0) {
+ y4m_ctx->src_c_dec_h = 2;
+ y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 2;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz =
+ 2 * (y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * ((y4m_ctx->pic_h + 1) / 2));
/* Natively supported: no conversion required. */
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
- _y4m->bit_depth = 12;
- _y4m->bps = 18;
- _y4m->vpx_fmt = VPX_IMG_FMT_I42016;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
+ y4m_ctx->bit_depth = 12;
+ y4m_ctx->bps = 18;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I42016;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 420p12 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "420mpeg2") == 0) {
- _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
- /*Chroma filter required: read into the aux buf first.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz =
- 2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
- _y4m->convert = y4m_convert_42xmpeg2_42xjpeg;
- } else if (strcmp(_y4m->chroma_type, "420paldv") == 0) {
- _y4m->src_c_dec_h = _y4m->dst_c_dec_h = _y4m->src_c_dec_v = _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ } else if (strcmp(y4m_ctx->chroma_type, "420paldv") == 0) {
+ y4m_ctx->src_c_dec_h = y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_v =
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Chroma filter required: read into the aux buf first.
We need to make two filter passes, so we need some extra space in the
aux buffer.*/
- _y4m->aux_buf_sz = 3 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
- _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * ((_y4m->pic_h + 1) / 2);
- _y4m->convert = y4m_convert_42xpaldv_42xjpeg;
- } else if (strcmp(_y4m->chroma_type, "422jpeg") == 0) {
- _y4m->src_c_dec_h = _y4m->dst_c_dec_h = 2;
- _y4m->src_c_dec_v = 1;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ y4m_ctx->aux_buf_sz =
+ 3 * ((y4m_ctx->pic_w + 1) / 2) * ((y4m_ctx->pic_h + 1) / 2);
+ y4m_ctx->aux_buf_read_sz =
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * ((y4m_ctx->pic_h + 1) / 2);
+ y4m_ctx->convert = y4m_convert_42xpaldv_42xjpeg;
+ } else if (strcmp(y4m_ctx->chroma_type, "422jpeg") == 0) {
+ y4m_ctx->src_c_dec_h = y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Chroma filter required: read into the aux buf first.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_422jpeg_420jpeg;
- } else if (strcmp(_y4m->chroma_type, "422") == 0) {
- _y4m->src_c_dec_h = 2;
- _y4m->src_c_dec_v = 1;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz =
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
+ y4m_ctx->convert = y4m_convert_422jpeg_420jpeg;
+ } else if (strcmp(y4m_ctx->chroma_type, "422") == 0) {
+ y4m_ctx->src_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 1;
if (only_420) {
- _y4m->dst_c_dec_h = 2;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Chroma filter required: read into the aux buf first.
We need to make two filter passes, so we need some extra space in the
aux buffer.*/
- _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz +
- ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_422_420jpeg;
+ y4m_ctx->aux_buf_read_sz =
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz +
+ ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
+ y4m_ctx->convert = y4m_convert_422_420jpeg;
} else {
- _y4m->vpx_fmt = VPX_IMG_FMT_I422;
- _y4m->bps = 16;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h
- + 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I422;
+ y4m_ctx->bps = 16;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz =
+ y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
/*Natively supported: no conversion required.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
}
- } else if (strcmp(_y4m->chroma_type, "422p10") == 0) {
- _y4m->src_c_dec_h = 2;
- _y4m->src_c_dec_v = 1;
- _y4m->vpx_fmt = VPX_IMG_FMT_I42216;
- _y4m->bps = 20;
- _y4m->bit_depth = 10;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 2 * (_y4m->pic_w * _y4m->pic_h +
- 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h);
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ } else if (strcmp(y4m_ctx->chroma_type, "422p10") == 0) {
+ y4m_ctx->src_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I42216;
+ y4m_ctx->bps = 20;
+ y4m_ctx->bit_depth = 10;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz =
+ 2 * (y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h);
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 422p10 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "422p12") == 0) {
- _y4m->src_c_dec_h = 2;
- _y4m->src_c_dec_v = 1;
- _y4m->vpx_fmt = VPX_IMG_FMT_I42216;
- _y4m->bps = 24;
- _y4m->bit_depth = 12;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 2 * (_y4m->pic_w * _y4m->pic_h +
- 2 * ((_y4m->pic_w + 1) / 2) * _y4m->pic_h);
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ } else if (strcmp(y4m_ctx->chroma_type, "422p12") == 0) {
+ y4m_ctx->src_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I42216;
+ y4m_ctx->bps = 24;
+ y4m_ctx->bit_depth = 12;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz =
+ 2 * (y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h);
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 422p12 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "411") == 0) {
- _y4m->src_c_dec_h = 4;
- _y4m->dst_c_dec_h = 2;
- _y4m->src_c_dec_v = 1;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ } else if (strcmp(y4m_ctx->chroma_type, "411") == 0) {
+ y4m_ctx->src_c_dec_h = 4;
+ y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Chroma filter required: read into the aux buf first.
We need to make two filter passes, so we need some extra space in the
aux buffer.*/
- _y4m->aux_buf_read_sz = 2 * ((_y4m->pic_w + 3) / 4) * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz + ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_411_420jpeg;
- } else if (strcmp(_y4m->chroma_type, "444") == 0) {
- _y4m->src_c_dec_h = 1;
- _y4m->src_c_dec_v = 1;
+ y4m_ctx->aux_buf_read_sz = 2 * ((y4m_ctx->pic_w + 3) / 4) * y4m_ctx->pic_h;
+ y4m_ctx->aux_buf_sz =
+ y4m_ctx->aux_buf_read_sz + ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
+ y4m_ctx->convert = y4m_convert_411_420jpeg;
+ fprintf(stderr, "Unsupported conversion from yuv 411\n");
+ return -1;
+ } else if (strcmp(y4m_ctx->chroma_type, "444") == 0) {
+ y4m_ctx->src_c_dec_h = 1;
+ y4m_ctx->src_c_dec_v = 1;
if (only_420) {
- _y4m->dst_c_dec_h = 2;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ y4m_ctx->dst_c_dec_h = 2;
+ y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Chroma filter required: read into the aux buf first.
We need to make two filter passes, so we need some extra space in the
aux buffer.*/
- _y4m->aux_buf_read_sz = 2 * _y4m->pic_w * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz +
- ((_y4m->pic_w + 1) / 2) * _y4m->pic_h;
- _y4m->convert = y4m_convert_444_420jpeg;
+ y4m_ctx->aux_buf_read_sz = 2 * y4m_ctx->pic_w * y4m_ctx->pic_h;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz +
+ ((y4m_ctx->pic_w + 1) / 2) * y4m_ctx->pic_h;
+ y4m_ctx->convert = y4m_convert_444_420jpeg;
} else {
- _y4m->vpx_fmt = VPX_IMG_FMT_I444;
- _y4m->bps = 24;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I444;
+ y4m_ctx->bps = 24;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz = 3 * y4m_ctx->pic_w * y4m_ctx->pic_h;
/*Natively supported: no conversion required.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
}
- } else if (strcmp(_y4m->chroma_type, "444p10") == 0) {
- _y4m->src_c_dec_h = 1;
- _y4m->src_c_dec_v = 1;
- _y4m->vpx_fmt = VPX_IMG_FMT_I44416;
- _y4m->bps = 30;
- _y4m->bit_depth = 10;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 2 * 3 * _y4m->pic_w * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ } else if (strcmp(y4m_ctx->chroma_type, "444p10") == 0) {
+ y4m_ctx->src_c_dec_h = 1;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I44416;
+ y4m_ctx->bps = 30;
+ y4m_ctx->bit_depth = 10;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz = 2 * 3 * y4m_ctx->pic_w * y4m_ctx->pic_h;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 444p10 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "444p12") == 0) {
- _y4m->src_c_dec_h = 1;
- _y4m->src_c_dec_v = 1;
- _y4m->vpx_fmt = VPX_IMG_FMT_I44416;
- _y4m->bps = 36;
- _y4m->bit_depth = 12;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 2 * 3 * _y4m->pic_w * _y4m->pic_h;
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
+ } else if (strcmp(y4m_ctx->chroma_type, "444p12") == 0) {
+ y4m_ctx->src_c_dec_h = 1;
+ y4m_ctx->src_c_dec_v = 1;
+ y4m_ctx->vpx_fmt = VPX_IMG_FMT_I44416;
+ y4m_ctx->bps = 36;
+ y4m_ctx->bit_depth = 12;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->src_c_dec_h;
+ y4m_ctx->dst_c_dec_v = y4m_ctx->src_c_dec_v;
+ y4m_ctx->dst_buf_read_sz = 2 * 3 * y4m_ctx->pic_w * y4m_ctx->pic_h;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_null;
if (only_420) {
fprintf(stderr, "Unsupported conversion from 444p12 to 420jpeg\n");
return -1;
}
- } else if (strcmp(_y4m->chroma_type, "444alpha") == 0) {
- _y4m->src_c_dec_h = 1;
- _y4m->src_c_dec_v = 1;
- if (only_420) {
- _y4m->dst_c_dec_h = 2;
- _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
- /*Chroma filter required: read into the aux buf first.
- We need to make two filter passes, so we need some extra space in the
- aux buffer.
- The extra plane also gets read into the aux buf.
- It will be discarded.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 3 * _y4m->pic_w * _y4m->pic_h;
- _y4m->convert = y4m_convert_444_420jpeg;
- } else {
- _y4m->vpx_fmt = VPX_IMG_FMT_444A;
- _y4m->bps = 32;
- _y4m->dst_c_dec_h = _y4m->src_c_dec_h;
- _y4m->dst_c_dec_v = _y4m->src_c_dec_v;
- _y4m->dst_buf_read_sz = 4 * _y4m->pic_w * _y4m->pic_h;
- /*Natively supported: no conversion required.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_null;
- }
- } else if (strcmp(_y4m->chroma_type, "mono") == 0) {
- _y4m->src_c_dec_h = _y4m->src_c_dec_v = 0;
- _y4m->dst_c_dec_h = _y4m->dst_c_dec_v = 2;
- _y4m->dst_buf_read_sz = _y4m->pic_w * _y4m->pic_h;
+ } else if (strcmp(y4m_ctx->chroma_type, "mono") == 0) {
+ y4m_ctx->src_c_dec_h = y4m_ctx->src_c_dec_v = 0;
+ y4m_ctx->dst_c_dec_h = y4m_ctx->dst_c_dec_v = 2;
+ y4m_ctx->dst_buf_read_sz = y4m_ctx->pic_w * y4m_ctx->pic_h;
/*No extra space required, but we need to clear the chroma planes.*/
- _y4m->aux_buf_sz = _y4m->aux_buf_read_sz = 0;
- _y4m->convert = y4m_convert_mono_420jpeg;
+ y4m_ctx->aux_buf_sz = y4m_ctx->aux_buf_read_sz = 0;
+ y4m_ctx->convert = y4m_convert_mono_420jpeg;
} else {
- fprintf(stderr, "Unknown chroma sampling type: %s\n", _y4m->chroma_type);
+ fprintf(stderr, "Unknown chroma sampling type: %s\n", y4m_ctx->chroma_type);
return -1;
}
/*The size of the final frame buffers is always computed from the
destination chroma decimation type.*/
- _y4m->dst_buf_sz = _y4m->pic_w * _y4m->pic_h
- + 2 * ((_y4m->pic_w + _y4m->dst_c_dec_h - 1) / _y4m->dst_c_dec_h) *
- ((_y4m->pic_h + _y4m->dst_c_dec_v - 1) / _y4m->dst_c_dec_v);
- if (_y4m->bit_depth == 8)
- _y4m->dst_buf = (unsigned char *)malloc(_y4m->dst_buf_sz);
+ y4m_ctx->dst_buf_sz =
+ y4m_ctx->pic_w * y4m_ctx->pic_h +
+ 2 * ((y4m_ctx->pic_w + y4m_ctx->dst_c_dec_h - 1) / y4m_ctx->dst_c_dec_h) *
+ ((y4m_ctx->pic_h + y4m_ctx->dst_c_dec_v - 1) / y4m_ctx->dst_c_dec_v);
+ if (y4m_ctx->bit_depth == 8)
+ y4m_ctx->dst_buf = (unsigned char *)malloc(y4m_ctx->dst_buf_sz);
else
- _y4m->dst_buf = (unsigned char *)malloc(2 * _y4m->dst_buf_sz);
+ y4m_ctx->dst_buf = (unsigned char *)malloc(2 * y4m_ctx->dst_buf_sz);
+ if (!y4m_ctx->dst_buf) return -1;
- if (_y4m->aux_buf_sz > 0)
- _y4m->aux_buf = (unsigned char *)malloc(_y4m->aux_buf_sz);
+ if (y4m_ctx->aux_buf_sz > 0) {
+ y4m_ctx->aux_buf = (unsigned char *)malloc(y4m_ctx->aux_buf_sz);
+ if (!y4m_ctx->aux_buf) {
+ free(y4m_ctx->dst_buf);
+ return -1;
+ }
+ }
return 0;
}
int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *_img) {
char frame[6];
- int pic_sz;
- int c_w;
- int c_h;
- int c_sz;
- int bytes_per_sample = _y4m->bit_depth > 8 ? 2 : 1;
+ int pic_sz;
+ int c_w;
+ int c_h;
+ int c_sz;
+ int bytes_per_sample = _y4m->bit_depth > 8 ? 2 : 1;
/*Read and skip the frame header.*/
if (!file_read(frame, 6, _fin)) return 0;
if (memcmp(frame, "FRAME", 5)) {
}
if (frame[5] != '\n') {
char c;
- int j;
- for (j = 0; j < 79 && file_read(&c, 1, _fin) && c != '\n'; j++) {}
+ int j;
+ for (j = 0; j < 79 && file_read(&c, 1, _fin) && c != '\n'; j++) {
+ }
if (j == 79) {
fprintf(stderr, "Error parsing Y4M frame header\n");
return -1;
projects / platform / upstream / libvpx.git / blobdiff