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FreeRDP/libfreerdp/codec/h264.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* H.264 Bitmap Compression
*
* Copyright 2014 Mike McDonald <Mike.McDonald@software.dell.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <winpr/crt.h>
#include <winpr/print.h>
#include <winpr/bitstream.h>
#include <freerdp/codec/color.h>
#include <freerdp/codec/h264.h>
#define USE_GRAY_SCALE 0
#define USE_UPCONVERT 0
static BYTE clip(int x)
{
if (x < 0) return 0;
if (x > 255) return 255;
return (BYTE)x;
}
static UINT32 YUV_to_RGB(BYTE Y, BYTE U, BYTE V)
{
BYTE R, G, B;
#if USE_GRAY_SCALE
/*
* Displays the Y plane as a gray-scale image.
*/
R = Y;
G = Y;
B = Y;
#else
int C, D, E;
#if 0
/*
* Documented colorspace conversion from YUV to RGB.
* See http://msdn.microsoft.com/en-us/library/ms893078.aspx
*/
C = Y - 16;
D = U - 128;
E = V - 128;
R = clip(( 298 * C + 409 * E + 128) >> 8);
G = clip(( 298 * C - 100 * D - 208 * E + 128) >> 8);
B = clip(( 298 * C + 516 * D + 128) >> 8);
#endif
#if 0
/*
* These coefficients produce better results.
* See http://www.microchip.com/forums/m599060.aspx
*/
C = Y;
D = U - 128;
E = V - 128;
R = clip(( 256 * C + 359 * E + 128) >> 8);
G = clip(( 256 * C - 88 * D - 183 * E + 128) >> 8);
B = clip(( 256 * C + 454 * D + 128) >> 8);
#endif
#if 1
/*
* These coefficients produce excellent results.
*/
C = Y;
D = U - 128;
E = V - 128;
R = clip(( 256 * C + 403 * E + 128) >> 8);
G = clip(( 256 * C - 48 * D - 120 * E + 128) >> 8);
B = clip(( 256 * C + 475 * D + 128) >> 8);
#endif
#endif
return RGB32(R, G, B);
}
#if USE_UPCONVERT
static BYTE* h264_convert_420_to_444(BYTE* chroma420, int chroma420Width, int chroma420Height, int chroma420Stride)
{
BYTE *chroma444, *src, *dst;
int chroma444Width;
int chroma444Height;
int i, j;
chroma444Width = chroma420Width * 2;
chroma444Height = chroma420Height * 2;
chroma444 = (BYTE*) malloc(chroma444Width * chroma444Height);
if (!chroma444)
return NULL;
/* Upconvert in the horizontal direction. */
for (j = 0; j < chroma420Height; j++)
{
src = chroma420 + j * chroma420Stride;
dst = chroma444 + j * chroma444Width;
dst[0] = src[0];
for (i = 1; i < chroma420Width; i++)
{
dst[2*i-1] = (3 * src[i-1] + src[i] + 2) >> 2;
dst[2*i] = (src[i-1] + 3 * src[i] + 2) >> 2;
}
dst[chroma444Width-1] = src[chroma420Width-1];
}
/* Upconvert in the vertical direction (in-place, bottom-up). */
for (i = 0; i < chroma444Width; i++)
{
src = chroma444 + i + (chroma420Height-2) * chroma444Width;
dst = chroma444 + i + (2*(chroma420Height-2)+1) * chroma444Width;
dst[2*chroma444Width] = src[chroma444Width];
for (j = chroma420Height - 2; j >= 0; j--)
{
dst[chroma444Width] = (src[0] + 3 * src[chroma444Width] + 2) >> 2;
dst[0] = (3 * src[0] + src[chroma444Width] + 2) >> 2;
dst -= 2 * chroma444Width;
src -= chroma444Width;
}
}
return chroma444;
}
#endif
static int g_H264FrameId = 0;
static BOOL g_H264DumpFrames = FALSE;
static void h264_dump_h264_data(BYTE* data, int size)
{
FILE* fp;
char buf[4096];
snprintf(buf, sizeof(buf), "/tmp/wlog/bs_%d.h264", g_H264FrameId);
fp = fopen(buf, "wb");
fwrite(data, 1, size, fp);
fflush(fp);
fclose(fp);
}
static void h264_dump_yuv_data(BYTE* yuv[], int width, int height, int stride[])
{
FILE* fp;
BYTE* srcp;
char buf[4096];
int j;
snprintf(buf, sizeof(buf), "/tmp/wlog/H264_%d.ppm", g_H264FrameId);
fp = fopen(buf, "wb");
fwrite("P5\n", 1, 3, fp);
snprintf(buf, sizeof(buf), "%d %d\n", width, height);
fwrite(buf, 1, strlen(buf), fp);
fwrite("255\n", 1, 4, fp);
srcp = yuv[0];
for (j = 0; j < height; j++)
{
fwrite(srcp, 1, width, fp);
srcp += stride[0];
}
fflush(fp);
fclose(fp);
}
int h264_prepare_rgb_buffer(H264_CONTEXT* h264, int width, int height)
{
UINT32 size;
h264->width = width;
h264->height = height;
h264->scanline = h264->width * 4;
size = h264->scanline * h264->height;
if (size > h264->size)
{
h264->size = size;
h264->data = (BYTE*) realloc(h264->data, h264->size);
memset(h264->data, 0, h264->size);
}
if (!h264->data)
return -1;
return 1;
}
int freerdp_image_copy_yuv420p_to_xrgb(BYTE* pDstData, int nDstStep, int nXDst, int nYDst,
int nWidth, int nHeight, BYTE* pSrcData[3], int nSrcStep[2], int nXSrc, int nYSrc)
{
int x, y;
BYTE* pDstPixel8;
BYTE *pY, *pU, *pV;
int shift = 1;
#if USE_UPCONVERT
/* Convert 4:2:0 YUV to 4:4:4 YUV. */
pSrcData[1] = h264_convert_420_to_444(pSrcData[1], nWidth / 2, nHeight / 2, nSrcStep[1]);
pSrcData[2] = h264_convert_420_to_444(pSrcData[2], nWidth / 2, nHeight / 2, nSrcStep[1]);
nSrcStep[1] = nWidth;
shift = 0;
#endif
pY = pSrcData[0] + (nYSrc * nSrcStep[0]) + nXSrc;
pDstPixel8 = &pDstData[(nYDst * nDstStep) + (nXDst * 4)];
for (y = 0; y < nHeight; y++)
{
pU = pSrcData[1] + ((nYSrc + y) >> shift) * nSrcStep[1];
pV = pSrcData[2] + ((nYSrc + y) >> shift) * nSrcStep[1];
for (x = 0; x < nWidth; x++)
{
BYTE Y, U, V;
Y = *pY;
U = pU[(nXSrc + x) >> shift];
V = pV[(nXSrc + x) >> shift];
*((UINT32*) pDstPixel8) = YUV_to_RGB(Y, U, V);
pDstPixel8 += 4;
pY++;
}
pDstPixel8 += (nDstStep - (nWidth * 4));
pY += (nSrcStep[0] - nWidth);
}
#if USE_UPCONVERT
free(pSrcData[1]);
free(pSrcData[2]);
#endif
return 1;
}
BYTE* h264_strip_nal_unit_au_delimiter(BYTE* pSrcData, UINT32* pSrcSize)
{
BYTE* data = pSrcData;
UINT32 size = *pSrcSize;
BYTE forbidden_zero_bit = 0;
BYTE nal_ref_idc = 0;
BYTE nal_unit_type = 0;
/* ITU-T H.264 B.1.1 Byte stream NAL unit syntax */
while (size > 0)
{
if (*data)
break;
data++;
size--;
}
if (*data != 1)
return pSrcData;
data++;
size--;
forbidden_zero_bit = (data[0] >> 7);
nal_ref_idc = (data[0] >> 5);
nal_unit_type = (data[0] & 0x1F);
if (forbidden_zero_bit)
return pSrcData; /* invalid */
if (nal_unit_type == 9)
{
/* NAL Unit AU Delimiter */
printf("NAL Unit AU Delimiter: idc: %d\n", nal_ref_idc);
data += 2;
size -= 2;
*pSrcSize = size;
return data;
}
return pSrcData;
}
/*************************************************
*
* OpenH264 Implementation
*
************************************************/
#ifdef WITH_OPENH264
static BOOL g_openh264_trace_enabled = TRUE;
static void openh264_trace_callback(H264_CONTEXT* h264, int level, const char* message)
{
printf("%d - %s\n", level, message);
}
static int openh264_decompress(H264_CONTEXT* h264, BYTE* pSrcData, UINT32 SrcSize,
BYTE* pDstData, DWORD DstFormat, int nDstStep, int nXDst, int nYDst, int nWidth, int nHeight)
{
DECODING_STATE state;
SBufferInfo sBufferInfo;
SSysMEMBuffer* pSystemBuffer;
BYTE* pYUVData[3];
if (!h264->pDecoder)
return -1;
/*
* Decompress the image. The RDP host only seems to send I420 format.
*/
pYUVData[0] = NULL;
pYUVData[1] = NULL;
pYUVData[2] = NULL;
ZeroMemory(&sBufferInfo, sizeof(sBufferInfo));
state = (*h264->pDecoder)->DecodeFrame2(
h264->pDecoder,
pSrcData,
SrcSize,
pYUVData,
&sBufferInfo);
pSystemBuffer = &sBufferInfo.UsrData.sSystemBuffer;
#if 1
printf("h264_decompress: state=%u, pYUVData=[%p,%p,%p], bufferStatus=%d, width=%d, height=%d, format=%d, stride=[%d,%d]\n",
state, pYUVData[0], pYUVData[1], pYUVData[2], sBufferInfo.iBufferStatus,
pSystemBuffer->iWidth, pSystemBuffer->iHeight, pSystemBuffer->iFormat,
pSystemBuffer->iStride[0], pSystemBuffer->iStride[1]);
#endif
if (state != 0)
return -1;
if (!pYUVData[0] || !pYUVData[1] || !pYUVData[2])
return -1;
if (sBufferInfo.iBufferStatus != 1)
return -1;
if (pSystemBuffer->iFormat != videoFormatI420)
return -1;
/* Convert I420 (same as IYUV) to XRGB. */
if (g_H264DumpFrames)
{
h264_dump_yuv_data(pYUVData, pSystemBuffer->iWidth, pSystemBuffer->iHeight, pSystemBuffer->iStride);
}
g_H264FrameId++;
if (h264_prepare_rgb_buffer(h264, pSystemBuffer->iWidth, pSystemBuffer->iHeight) < 0)
return -1;
freerdp_image_copy_yuv420p_to_xrgb(h264->data, h264->scanline, 0, 0,
h264->width, h264->height, pYUVData, pSystemBuffer->iStride, 0, 0);
return 1;
}
static void openh264_free(H264_CONTEXT* h264)
{
if (h264->pDecoder)
{
(*h264->pDecoder)->Uninitialize(h264->pDecoder);
WelsDestroyDecoder(h264->pDecoder);
h264->pDecoder = NULL;
}
}
static BOOL openh264_init(H264_CONTEXT* h264)
{
static EVideoFormatType videoFormat = videoFormatI420;
static int traceLevel = WELS_LOG_DEBUG;
static WelsTraceCallback traceCallback = (WelsTraceCallback) openh264_trace_callback;
SDecodingParam sDecParam;
long status;
WelsCreateDecoder(&h264->pDecoder);
if (!h264->pDecoder)
{
printf("Failed to create OpenH264 decoder\n");
goto EXCEPTION;
}
ZeroMemory(&sDecParam, sizeof(sDecParam));
sDecParam.iOutputColorFormat = videoFormatI420;
sDecParam.uiEcActiveFlag = 1;
sDecParam.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_DEFAULT;
status = (*h264->pDecoder)->Initialize(h264->pDecoder, &sDecParam);
if (status != 0)
{
printf("Failed to initialize OpenH264 decoder (status=%ld)\n", status);
goto EXCEPTION;
}
status = (*h264->pDecoder)->SetOption(h264->pDecoder, DECODER_OPTION_DATAFORMAT, &videoFormat);
if (status != 0)
{
printf("Failed to set data format option on OpenH264 decoder (status=%ld)\n", status);
}
if (g_openh264_trace_enabled)
{
status = (*h264->pDecoder)->SetOption(h264->pDecoder, DECODER_OPTION_TRACE_LEVEL, &traceLevel);
if (status != 0)
{
printf("Failed to set trace level option on OpenH264 decoder (status=%ld)\n", status);
}
status = (*h264->pDecoder)->SetOption(h264->pDecoder, DECODER_OPTION_TRACE_CALLBACK, &traceCallback);
if (status != 0)
{
printf("Failed to set trace callback option on OpenH264 decoder (status=%ld)\n", status);
}
status = (*h264->pDecoder)->SetOption(h264->pDecoder, DECODER_OPTION_TRACE_CALLBACK_CONTEXT, &h264);
if (status != 0)
{
printf("Failed to set trace callback context option on OpenH264 decoder (status=%ld)\n", status);
}
}
return TRUE;
EXCEPTION:
openh264_free(h264);
return FALSE;
}
#endif
/*************************************************
*
* libavcodec Implementation
*
************************************************/
#ifdef WITH_LIBAVCODEC
static int libavcodec_decompress(H264_CONTEXT* h264, BYTE* pSrcData, UINT32 SrcSize,
BYTE* pDstData, DWORD DstFormat, int nDstStep, int nXDst, int nYDst, int nWidth, int nHeight)
{
AVPacket packet;
int gotFrame = 0;
int status;
av_init_packet(&packet);
packet.data = pSrcData;
packet.size = SrcSize;
status = avcodec_decode_video2(h264->codecContext, h264->videoFrame, &gotFrame, &packet);
if (status < 0)
{
printf("Failed to decode video frame (status=%d)\n", status);
return -1;
}
printf("libavcodec_decompress: frame decoded (status=%d, gotFrame=%d, width=%d, height=%d, Y=[%p,%d], U=[%p,%d], V=[%p,%d])\n",
status, gotFrame, h264->videoFrame->width, h264->videoFrame->height,
h264->videoFrame->data[0], h264->videoFrame->linesize[0],
h264->videoFrame->data[1], h264->videoFrame->linesize[1],
h264->videoFrame->data[2], h264->videoFrame->linesize[2]);
fflush(stdout);
if (gotFrame)
{
if (g_H264DumpFrames)
{
h264_dump_yuv_data(h264->videoFrame->data, h264->videoFrame->width, h264->videoFrame->height, h264->videoFrame->linesize);
}
if (h264_prepare_rgb_buffer(h264, h264->videoFrame->width, h264->videoFrame->height) < 0)
return -1;
freerdp_image_copy_yuv420p_to_xrgb(h264->data, h264->scanline, 0, 0,
h264->width, h264->height, h264->videoFrame->data, h264->videoFrame->linesize, 0, 0);
}
return 1;
}
static void libavcodec_free(H264_CONTEXT* h264)
{
if (h264->videoFrame)
{
av_free(h264->videoFrame);
}
if (h264->codecParser)
{
av_parser_close(h264->codecParser);
}
if (h264->codecContext)
{
avcodec_close(h264->codecContext);
av_free(h264->codecContext);
}
}
static BOOL libavcodec_init(H264_CONTEXT* h264)
{
avcodec_register_all();
h264->codec = avcodec_find_decoder(CODEC_ID_H264);
if (!h264->codec)
{
printf("Failed to find libav H.264 codec\n");
goto EXCEPTION;
}
h264->codecContext = avcodec_alloc_context3(h264->codec);
if (!h264->codecContext)
{
printf("Failed to allocate libav codec context\n");
goto EXCEPTION;
}
if (h264->codec->capabilities & CODEC_CAP_TRUNCATED)
{
h264->codecContext->flags |= CODEC_FLAG_TRUNCATED;
}
if (avcodec_open2(h264->codecContext, h264->codec, NULL) < 0)
{
printf("Failed to open libav codec\n");
goto EXCEPTION;
}
h264->codecParser = av_parser_init(CODEC_ID_H264);
if (!h264->codecParser)
{
printf("Failed to initialize libav parser\n");
goto EXCEPTION;
}
h264->videoFrame = avcodec_alloc_frame();
if (!h264->videoFrame)
{
printf("Failed to allocate libav frame\n");
goto EXCEPTION;
}
return TRUE;
EXCEPTION:
libavcodec_free(h264);
return FALSE;
}
#endif
int h264_decompress(H264_CONTEXT* h264, BYTE* pSrcData, UINT32 SrcSize,
BYTE** ppDstData, DWORD DstFormat, int nDstStep, int nXDst, int nYDst, int nWidth, int nHeight)
{
UINT32 UncompressedSize;
BYTE* pDstData;
if (!h264)
return -1;
#if 0
pSrcData = h264_strip_nal_unit_au_delimiter(pSrcData, &SrcSize);
#endif
#if 1
printf("h264_decompress: pSrcData=%p, SrcSize=%u, pDstData=%p, nDstStep=%d, nXDst=%d, nYDst=%d, nWidth=%d, nHeight=%d)\n",
pSrcData, SrcSize, *ppDstData, nDstStep, nXDst, nYDst, nWidth, nHeight);
#endif
/* Allocate a destination buffer (if needed). */
UncompressedSize = nWidth * nHeight * 4;
if (UncompressedSize == 0)
return -1;
pDstData = *ppDstData;
if (!pDstData)
{
pDstData = (BYTE*) malloc(UncompressedSize);
if (!pDstData)
return -1;
*ppDstData = pDstData;
}
if (g_H264DumpFrames)
{
h264_dump_h264_data(pSrcData, SrcSize);
}
#ifdef WITH_OPENH264
return openh264_decompress(
h264, pSrcData, SrcSize,
pDstData, DstFormat, nDstStep,
nXDst, nYDst, nWidth, nHeight);
#endif
#ifdef WITH_LIBAVCODEC
return libavcodec_decompress(
h264, pSrcData, SrcSize,
pDstData, DstFormat, nDstStep,
nXDst, nYDst, nWidth, nHeight);
#endif
return 1;
}
int h264_compress(H264_CONTEXT* h264, BYTE* pSrcData, UINT32 SrcSize, BYTE** ppDstData, UINT32* pDstSize)
{
return 1;
}
void h264_context_reset(H264_CONTEXT* h264)
{
}
H264_CONTEXT* h264_context_new(BOOL Compressor)
{
H264_CONTEXT* h264;
h264 = (H264_CONTEXT*) calloc(1, sizeof(H264_CONTEXT));
if (h264)
{
h264->Compressor = Compressor;
if (h264_prepare_rgb_buffer(h264, 256, 256) < 0)
return NULL;
#ifdef WITH_OPENH264
if (!openh264_init(h264))
{
free(h264);
return NULL;
}
#endif
#ifdef WITH_LIBAVCODEC
if (!libavcodec_init(h264))
{
free(h264);
return NULL;
}
#endif
h264_context_reset(h264);
}
return h264;
}
void h264_context_free(H264_CONTEXT* h264)
{
if (h264)
{
free(h264->data);
#ifdef WITH_OPENH264
openh264_free(h264);
#endif
#ifdef WITH_LIBAVCODEC
libavcodec_free(h264);
#endif
free(h264);
}
}
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