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Diffstat (limited to 'media/libyuv/libyuv/source/convert_jpeg.cc')
| -rw-r--r-- | media/libyuv/libyuv/source/convert_jpeg.cc | 602 |
1 files changed, 602 insertions, 0 deletions
diff --git a/media/libyuv/libyuv/source/convert_jpeg.cc b/media/libyuv/libyuv/source/convert_jpeg.cc new file mode 100644 index 0000000000..d7556ee91b --- /dev/null +++ b/media/libyuv/libyuv/source/convert_jpeg.cc @@ -0,0 +1,602 @@ +/* + * Copyright 2011 The LibYuv Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "libyuv/convert.h" +#include "libyuv/convert_argb.h" + +#ifdef HAVE_JPEG +#include "libyuv/mjpeg_decoder.h" +#endif + +#ifdef __cplusplus +namespace libyuv { +extern "C" { +#endif + +#ifdef HAVE_JPEG +struct I420Buffers { + uint8_t* y; + int y_stride; + uint8_t* u; + int u_stride; + uint8_t* v; + int v_stride; + int w; + int h; +}; + +static void JpegCopyI420(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + I420Buffers* dest = (I420Buffers*)(opaque); + I420Copy(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->u, dest->u_stride, dest->v, + dest->v_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->u += ((rows + 1) >> 1) * dest->u_stride; + dest->v += ((rows + 1) >> 1) * dest->v_stride; + dest->h -= rows; +} + +static void JpegI422ToI420(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + I420Buffers* dest = (I420Buffers*)(opaque); + I422ToI420(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->u, dest->u_stride, dest->v, + dest->v_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->u += ((rows + 1) >> 1) * dest->u_stride; + dest->v += ((rows + 1) >> 1) * dest->v_stride; + dest->h -= rows; +} + +static void JpegI444ToI420(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + I420Buffers* dest = (I420Buffers*)(opaque); + I444ToI420(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->u, dest->u_stride, dest->v, + dest->v_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->u += ((rows + 1) >> 1) * dest->u_stride; + dest->v += ((rows + 1) >> 1) * dest->v_stride; + dest->h -= rows; +} + +static void JpegI400ToI420(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + I420Buffers* dest = (I420Buffers*)(opaque); + I400ToI420(data[0], strides[0], dest->y, dest->y_stride, dest->u, + dest->u_stride, dest->v, dest->v_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->u += ((rows + 1) >> 1) * dest->u_stride; + dest->v += ((rows + 1) >> 1) * dest->v_stride; + dest->h -= rows; +} + +// Query size of MJPG in pixels. +LIBYUV_API +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(src_mjpg, src_size_mjpg); + if (ret) { + *width = mjpeg_decoder.GetWidth(); + *height = mjpeg_decoder.GetHeight(); + } + mjpeg_decoder.UnloadFrame(); + return ret ? 0 : -1; // -1 for runtime failure. +} + +// MJPG (Motion JPeg) to I420 +// TODO(fbarchard): review src_width and src_height requirement. dst_width and +// dst_height may be enough. +LIBYUV_API +int MJPGToI420(const uint8_t* src_mjpg, + size_t src_size_mjpg, + uint8_t* dst_y, + int dst_stride_y, + uint8_t* dst_u, + int dst_stride_u, + uint8_t* dst_v, + int dst_stride_v, + int src_width, + int src_height, + int dst_width, + int dst_height) { + 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(src_mjpg, src_size_mjpg); + if (ret && (mjpeg_decoder.GetWidth() != src_width || + mjpeg_decoder.GetHeight() != src_height)) { + // ERROR: MJPEG frame has unexpected dimensions + mjpeg_decoder.UnloadFrame(); + return 1; // runtime failure + } + if (ret) { + I420Buffers bufs = {dst_y, dst_stride_y, dst_u, dst_stride_u, + dst_v, dst_stride_v, dst_width, dst_height}; + // YUV420 + if (mjpeg_decoder.GetColorSpace() == MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 2 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegCopyI420, &bufs, dst_width, + dst_height); + // YUV422 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI422ToI420, &bufs, dst_width, + dst_height); + // YUV444 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI444ToI420, &bufs, dst_width, + dst_height); + // YUV400 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceGrayscale && + mjpeg_decoder.GetNumComponents() == 1 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToI420, &bufs, dst_width, + dst_height); + } else { + // 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; + } + } + return ret ? 0 : 1; +} + +struct NV21Buffers { + uint8_t* y; + int y_stride; + uint8_t* vu; + int vu_stride; + int w; + int h; +}; + +static void JpegI420ToNV21(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + I420ToNV21(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI422ToNV21(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + I422ToNV21(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI444ToNV21(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + I444ToNV21(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI400ToNV21(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + I400ToNV21(data[0], strides[0], dest->y, dest->y_stride, dest->vu, + dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +// MJPG (Motion JPeg) to NV21 +LIBYUV_API +int MJPGToNV21(const uint8_t* src_mjpg, + size_t src_size_mjpg, + uint8_t* dst_y, + int dst_stride_y, + uint8_t* dst_vu, + int dst_stride_vu, + int src_width, + int src_height, + int dst_width, + int dst_height) { + 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(src_mjpg, src_size_mjpg); + if (ret && (mjpeg_decoder.GetWidth() != src_width || + mjpeg_decoder.GetHeight() != src_height)) { + // ERROR: MJPEG frame has unexpected dimensions + mjpeg_decoder.UnloadFrame(); + return 1; // runtime failure + } + if (ret) { + NV21Buffers bufs = {dst_y, dst_stride_y, dst_vu, + dst_stride_vu, dst_width, dst_height}; + // YUV420 + if (mjpeg_decoder.GetColorSpace() == MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 2 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI420ToNV21, &bufs, dst_width, + dst_height); + // YUV422 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI422ToNV21, &bufs, dst_width, + dst_height); + // YUV444 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI444ToNV21, &bufs, dst_width, + dst_height); + // YUV400 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceGrayscale && + mjpeg_decoder.GetNumComponents() == 1 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToNV21, &bufs, dst_width, + dst_height); + } else { + // Unknown colorspace. + mjpeg_decoder.UnloadFrame(); + return 1; + } + } + return ret ? 0 : 1; +} + +static void JpegI420ToNV12(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + // Use NV21 with VU swapped. + I420ToNV21(data[0], strides[0], data[2], strides[2], data[1], strides[1], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI422ToNV12(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + // Use NV21 with VU swapped. + I422ToNV21(data[0], strides[0], data[2], strides[2], data[1], strides[1], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI444ToNV12(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + // Use NV21 with VU swapped. + I444ToNV21(data[0], strides[0], data[2], strides[2], data[1], strides[1], + dest->y, dest->y_stride, dest->vu, dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +static void JpegI400ToNV12(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + NV21Buffers* dest = (NV21Buffers*)(opaque); + // Use NV21 since there is no UV plane. + I400ToNV21(data[0], strides[0], dest->y, dest->y_stride, dest->vu, + dest->vu_stride, dest->w, rows); + dest->y += rows * dest->y_stride; + dest->vu += ((rows + 1) >> 1) * dest->vu_stride; + dest->h -= rows; +} + +// MJPG (Motion JPEG) to NV12. +LIBYUV_API +int MJPGToNV12(const uint8_t* sample, + size_t sample_size, + uint8_t* dst_y, + int dst_stride_y, + uint8_t* dst_uv, + int dst_stride_uv, + int src_width, + int src_height, + int dst_width, + int dst_height) { + if (sample_size == 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); + if (ret && (mjpeg_decoder.GetWidth() != src_width || + mjpeg_decoder.GetHeight() != src_height)) { + // ERROR: MJPEG frame has unexpected dimensions + mjpeg_decoder.UnloadFrame(); + return 1; // runtime failure + } + if (ret) { + // Use NV21Buffers but with UV instead of VU. + NV21Buffers bufs = {dst_y, dst_stride_y, dst_uv, + dst_stride_uv, dst_width, dst_height}; + // YUV420 + if (mjpeg_decoder.GetColorSpace() == MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 2 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI420ToNV12, &bufs, dst_width, + dst_height); + // YUV422 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI422ToNV12, &bufs, dst_width, + dst_height); + // YUV444 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI444ToNV12, &bufs, dst_width, + dst_height); + // YUV400 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceGrayscale && + mjpeg_decoder.GetNumComponents() == 1 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToNV12, &bufs, dst_width, + dst_height); + } else { + // Unknown colorspace. + mjpeg_decoder.UnloadFrame(); + return 1; + } + } + return ret ? 0 : 1; +} + +struct ARGBBuffers { + uint8_t* argb; + int argb_stride; + int w; + int h; +}; + +static void JpegI420ToARGB(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + ARGBBuffers* dest = (ARGBBuffers*)(opaque); + I420ToARGB(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->argb, dest->argb_stride, dest->w, rows); + dest->argb += rows * dest->argb_stride; + dest->h -= rows; +} + +static void JpegI422ToARGB(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + ARGBBuffers* dest = (ARGBBuffers*)(opaque); + I422ToARGB(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->argb, dest->argb_stride, dest->w, rows); + dest->argb += rows * dest->argb_stride; + dest->h -= rows; +} + +static void JpegI444ToARGB(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + ARGBBuffers* dest = (ARGBBuffers*)(opaque); + I444ToARGB(data[0], strides[0], data[1], strides[1], data[2], strides[2], + dest->argb, dest->argb_stride, dest->w, rows); + dest->argb += rows * dest->argb_stride; + dest->h -= rows; +} + +static void JpegI400ToARGB(void* opaque, + const uint8_t* const* data, + const int* strides, + int rows) { + ARGBBuffers* dest = (ARGBBuffers*)(opaque); + I400ToARGB(data[0], strides[0], dest->argb, dest->argb_stride, dest->w, rows); + dest->argb += rows * dest->argb_stride; + dest->h -= rows; +} + +// MJPG (Motion JPeg) to ARGB +// TODO(fbarchard): review src_width and src_height requirement. dst_width and +// dst_height may be enough. +LIBYUV_API +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 (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(src_mjpg, src_size_mjpg); + if (ret && (mjpeg_decoder.GetWidth() != src_width || + mjpeg_decoder.GetHeight() != src_height)) { + // ERROR: MJPEG frame has unexpected dimensions + mjpeg_decoder.UnloadFrame(); + return 1; // runtime failure + } + if (ret) { + ARGBBuffers bufs = {dst_argb, dst_stride_argb, dst_width, dst_height}; + // YUV420 + if (mjpeg_decoder.GetColorSpace() == MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 2 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI420ToARGB, &bufs, dst_width, + dst_height); + // YUV422 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 2 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI422ToARGB, &bufs, dst_width, + dst_height); + // YUV444 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceYCbCr && + mjpeg_decoder.GetNumComponents() == 3 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1 && + mjpeg_decoder.GetVertSampFactor(1) == 1 && + mjpeg_decoder.GetHorizSampFactor(1) == 1 && + mjpeg_decoder.GetVertSampFactor(2) == 1 && + mjpeg_decoder.GetHorizSampFactor(2) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI444ToARGB, &bufs, dst_width, + dst_height); + // YUV400 + } else if (mjpeg_decoder.GetColorSpace() == + MJpegDecoder::kColorSpaceGrayscale && + mjpeg_decoder.GetNumComponents() == 1 && + mjpeg_decoder.GetVertSampFactor(0) == 1 && + mjpeg_decoder.GetHorizSampFactor(0) == 1) { + ret = mjpeg_decoder.DecodeToCallback(&JpegI400ToARGB, &bufs, dst_width, + dst_height); + } else { + // 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; + } + } + return ret ? 0 : 1; +} + +#endif // HAVE_JPEG + +#ifdef __cplusplus +} // extern "C" +} // namespace libyuv +#endif |