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Add commment for jpeg parameters.

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Bug: None
Test: Try bots
Change-Id: I7b90731e828169af96b3e0b8f8821635cff57755
Reviewed-on: https://chromium-review.googlesource.com/c/1308819
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
This commit is contained in:
Frank Barchard 2018-10-30 18:41:29 -07:00
parent 76630fb27a
commit 12f9b5f351
8 changed files with 51 additions and 45 deletions
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2
README.chromium
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@ -1,6 +1,6 @@
Name: libyuv
URL: http://code.google.com/p/libyuv/
Version: 1722
Version: 1724
License: BSD
License File: LICENSE

14
include/libyuv/convert.h
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@ -375,11 +375,13 @@ int ARGB4444ToI420(const uint8_t* src_argb4444,
int height);
#ifdef HAVE_JPEG
// src_mjpg is pointer to raw jpeg bytes in memory
// src_size_mjpg is size of jpeg in bytes
// src_width/height provided by capture.
// dst_width/height for clipping determine final size.
LIBYUV_API
int MJPGToI420(const uint8_t* sample,
size_t sample_size,
int MJPGToI420(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_y,
int dst_stride_y,
uint8_t* dst_u,
@ -393,8 +395,8 @@ int MJPGToI420(const uint8_t* sample,
// JPEG to NV21
LIBYUV_API
int MJPGToNV21(const uint8_t* sample,
size_t sample_size,
int MJPGToNV21(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_y,
int dst_stride_y,
uint8_t* dst_vu,
@ -406,8 +408,8 @@ int MJPGToNV21(const uint8_t* sample,
// Query size of MJPG in pixels.
LIBYUV_API
int MJPGSize(const uint8_t* sample,
size_t sample_size,
int MJPGSize(const uint8_t* src_mjpg,
size_t src_size_mjpg,
int* width,
int* height);
#endif

4
include/libyuv/convert_argb.h
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@ -627,8 +627,8 @@ int AR30ToAB30(const uint8_t* src_ar30,
// src_width/height provided by capture
// dst_width/height for clipping determine final size.
LIBYUV_API
int MJPGToARGB(const uint8_t* sample,
size_t sample_size,
int MJPGToARGB(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_argb,
int dst_stride_argb,
int src_width,

2
include/libyuv/mjpeg_decoder.h
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@ -26,7 +26,7 @@ namespace libyuv {
extern "C" {
#endif
LIBYUV_BOOL ValidateJpeg(const uint8_t* sample, size_t sample_size);
LIBYUV_BOOL ValidateJpeg(const uint8_t* src_mjpg, size_t src_size_mjpg_size);
#ifdef __cplusplus
} // extern "C"

2
include/libyuv/version.h
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@ -11,6 +11,6 @@
#ifndef INCLUDE_LIBYUV_VERSION_H_
#define INCLUDE_LIBYUV_VERSION_H_
#define LIBYUV_VERSION 1723
#define LIBYUV_VERSION 1724
#endif // INCLUDE_LIBYUV_VERSION_H_

42
source/convert_jpeg.cc
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@ -89,12 +89,12 @@ static void JpegI400ToI420(void* opaque,
// Query size of MJPG in pixels.
LIBYUV_API
int MJPGSize(const uint8_t* sample,
size_t sample_size,
int MJPGSize(const uint8_t* src_mjpg,
size_t src_size_mjpg,
int* width,
int* height) {
MJpegDecoder mjpeg_decoder;
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(sample, sample_size);
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(src_mjpg, src_size_mjpg);
if (ret) {
*width = mjpeg_decoder.GetWidth();
*height = mjpeg_decoder.GetHeight();
@ -107,8 +107,8 @@ int MJPGSize(const uint8_t* sample,
// TODO(fbarchard): review src_width and src_height requirement. dst_width and
// dst_height may be enough.
LIBYUV_API
int MJPGToI420(const uint8_t* sample,
size_t sample_size,
int MJPGToI420(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_y,
int dst_stride_y,
uint8_t* dst_u,
@ -119,14 +119,14 @@ int MJPGToI420(const uint8_t* sample,
int src_height,
int dst_width,
int dst_height) {
if (sample_size == kUnknownDataSize) {
if (src_size_mjpg == kUnknownDataSize) {
// ERROR: MJPEG frame size unknown
return -1;
}
// TODO(fbarchard): Port MJpeg to C.
MJpegDecoder mjpeg_decoder;
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(sample, sample_size);
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(src_mjpg, src_size_mjpg);
if (ret && (mjpeg_decoder.GetWidth() != src_width ||
mjpeg_decoder.GetHeight() != src_height)) {
// ERROR: MJPEG frame has unexpected dimensions
@ -180,9 +180,9 @@ int MJPGToI420(const uint8_t* sample,
ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToI420, &bufs, dst_width,
dst_height);
} else {
// TODO(fbarchard): Implement conversion for any other colorspace/sample
// factors that occur in practice.
// ERROR: Unable to convert MJPEG frame because format is not supported
// TODO(fbarchard): Implement conversion for any other
// colorspace/subsample factors that occur in practice. ERROR: Unable to
// convert MJPEG frame because format is not supported
mjpeg_decoder.UnloadFrame();
return 1;
}
@ -249,8 +249,8 @@ static void JpegI400ToNV21(void* opaque,
// MJPG (Motion JPeg) to NV21
LIBYUV_API
int MJPGToNV21(const uint8_t* sample,
size_t sample_size,
int MJPGToNV21(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_y,
int dst_stride_y,
uint8_t* dst_vu,
@ -259,14 +259,14 @@ int MJPGToNV21(const uint8_t* sample,
int src_height,
int dst_width,
int dst_height) {
if (sample_size == kUnknownDataSize) {
if (src_size_mjpg == kUnknownDataSize) {
// ERROR: MJPEG frame size unknown
return -1;
}
// TODO(fbarchard): Port MJpeg to C.
MJpegDecoder mjpeg_decoder;
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(sample, sample_size);
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(src_mjpg, src_size_mjpg);
if (ret && (mjpeg_decoder.GetWidth() != src_width ||
mjpeg_decoder.GetHeight() != src_height)) {
// ERROR: MJPEG frame has unexpected dimensions
@ -382,22 +382,22 @@ static void JpegI400ToARGB(void* opaque,
// TODO(fbarchard): review src_width and src_height requirement. dst_width and
// dst_height may be enough.
LIBYUV_API
int MJPGToARGB(const uint8_t* sample,
size_t sample_size,
int MJPGToARGB(const uint8_t* src_mjpg,
size_t src_size_mjpg,
uint8_t* dst_argb,
int dst_stride_argb,
int src_width,
int src_height,
int dst_width,
int dst_height) {
if (sample_size == kUnknownDataSize) {
if (src_size_mjpg == kUnknownDataSize) {
// ERROR: MJPEG frame size unknown
return -1;
}
// TODO(fbarchard): Port MJpeg to C.
MJpegDecoder mjpeg_decoder;
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(sample, sample_size);
LIBYUV_BOOL ret = mjpeg_decoder.LoadFrame(src_mjpg, src_size_mjpg);
if (ret && (mjpeg_decoder.GetWidth() != src_width ||
mjpeg_decoder.GetHeight() != src_height)) {
// ERROR: MJPEG frame has unexpected dimensions
@ -450,9 +450,9 @@ int MJPGToARGB(const uint8_t* sample,
ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToARGB, &bufs, dst_width,
dst_height);
} else {
// TODO(fbarchard): Implement conversion for any other colorspace/sample
// factors that occur in practice.
// ERROR: Unable to convert MJPEG frame because format is not supported
// TODO(fbarchard): Implement conversion for any other
// colorspace/subsample factors that occur in practice. ERROR: Unable to
// convert MJPEG frame because format is not supported
mjpeg_decoder.UnloadFrame();
return 1;
}

26
source/mjpeg_validate.cc
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@ -18,10 +18,10 @@ extern "C" {
#endif
// Helper function to scan for EOI marker (0xff 0xd9).
static LIBYUV_BOOL ScanEOI(const uint8_t* sample, size_t sample_size) {
if (sample_size >= 2) {
const uint8_t* end = sample + sample_size - 1;
const uint8_t* it = sample;
static LIBYUV_BOOL ScanEOI(const uint8_t* src_mjpg, size_t src_size_mjpg) {
if (src_size_mjpg >= 2) {
const uint8_t* end = src_mjpg + src_size_mjpg - 1;
const uint8_t* it = src_mjpg;
while (it < end) {
// TODO(fbarchard): scan for 0xd9 instead.
it = (const uint8_t*)(memchr(it, 0xff, end - it));
@ -34,34 +34,34 @@ static LIBYUV_BOOL ScanEOI(const uint8_t* sample, size_t sample_size) {
++it; // Skip over current 0xff.
}
}
// ERROR: Invalid jpeg end code not found. Size sample_size
// ERROR: Invalid jpeg end code not found. Size src_size_mjpg
return LIBYUV_FALSE;
}
// Helper function to validate the jpeg appears intact.
LIBYUV_BOOL ValidateJpeg(const uint8_t* sample, size_t sample_size) {
LIBYUV_BOOL ValidateJpeg(const uint8_t* src_mjpg, size_t src_size_mjpg) {
// Maximum size that ValidateJpeg will consider valid.
const size_t kMaxJpegSize = 0x7fffffffull;
const size_t kBackSearchSize = 1024;
if (sample_size < 64 || sample_size > kMaxJpegSize || !sample) {
// ERROR: Invalid jpeg size: sample_size
if (src_size_mjpg < 64 || src_size_mjpg > kMaxJpegSize || !src_mjpg) {
// ERROR: Invalid jpeg size: src_size_mjpg
return LIBYUV_FALSE;
}
if (sample[0] != 0xff || sample[1] != 0xd8) { // SOI marker
if (src_mjpg[0] != 0xff || src_mjpg[1] != 0xd8) { // SOI marker
// ERROR: Invalid jpeg initial start code
return LIBYUV_FALSE;
}
// Look for the End Of Image (EOI) marker near the end of the buffer.
if (sample_size > kBackSearchSize) {
if (ScanEOI(sample + sample_size - kBackSearchSize, kBackSearchSize)) {
if (src_size_mjpg > kBackSearchSize) {
if (ScanEOI(src_mjpg + src_size_mjpg - kBackSearchSize, kBackSearchSize)) {
return LIBYUV_TRUE; // Success: Valid jpeg.
}
// Reduce search size for forward search.
sample_size = sample_size - kBackSearchSize + 1;
src_size_mjpg = src_size_mjpg - kBackSearchSize + 1;
}
// Step over SOI marker and scan for EOI.
return ScanEOI(sample + 2, sample_size - 2);
return ScanEOI(src_mjpg + 2, src_size_mjpg - 2);
}
#ifdef __cplusplus

4
source/scale_mmi.cc
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@ -26,6 +26,8 @@ extern "C" {
// This module is for Mips MMI.
#if !defined(LIBYUV_DISABLE_MMI) && defined(_MIPS_ARCH_LOONGSON3A)
// clang-format off
// CPU agnostic row functions
void ScaleRowDown2_MMI(const uint8_t* src_ptr,
ptrdiff_t src_stride,
@ -1101,6 +1103,8 @@ void ScaleRowUp2_16_MMI(const uint16_t* src_ptr,
: "memory");
}
// clang-format on
#endif // !defined(LIBYUV_DISABLE_MMI) && defined(_MIPS_ARCH_LOONGSON3A)
#ifdef __cplusplus