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freeswitch/src/mod/codecs/mod_openh264/mod_openh264.cpp

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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005-2013, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Seven Du <dujinfang@gmail.com>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Seven Du <dujinfang@gmail.com>
*
* mod_openh264 -- H264 Coded Using Cisco OpenH264
*
*/
// #define DEBUG_H264
#include <switch.h>
#define EPSN (0.000001f) // (1e-6) // desired float precision
#define PESN (0.000001f) // (1e-6) // desired float precision
#define MT_ENABLED
#include "codec_api.h"
//#include "inc/logging.h" // for debug
#define FPS 20.0f // frame rate
#define H264_NALU_BUFFER_SIZE 65536
#define MAX_NALUS 100
#define SLICE_SIZE SWITCH_DEFAULT_VIDEO_SIZE //NALU Slice Size
SWITCH_MODULE_LOAD_FUNCTION(mod_openh264_load);
SWITCH_MODULE_DEFINITION(mod_openh264, mod_openh264_load, NULL, NULL);
typedef struct h264_codec_context_s {
ISVCEncoder *encoder;
switch_bool_t encoder_initialized;
SEncParamExt encoder_params;
SFrameBSInfo bit_stream_info;
EVideoFrameType last_frame_type;
int cur_layer;
int cur_nalu_index;
uint8_t last_nalu_type;
uint8_t last_nri;
int last_nalu_data_pos;
int nalu_eat;
ISVCDecoder *decoder;
SDecodingParam decoder_params;
switch_buffer_t *nalu_buffer;
switch_image_t *img;
int got_sps;
int64_t pts;
int need_key_frame;
switch_size_t last_received_timestamp;
switch_bool_t last_received_complete_picture;
} h264_codec_context_t;
int FillSpecificParameters(SEncParamExt& param) {
/* Test for temporal, spatial, SNR scalability */
param.iPicWidth = 1280; // width of picture in samples
param.iPicHeight = 720; // height of picture in samples
param.iTargetBitrate = 1280 * 720 * 8; // target bitrate desired
param.iRCMode = RC_QUALITY_MODE; // rc mode control
param.uiMaxNalSize = SLICE_SIZE * 20;
param.iTemporalLayerNum = 1; // layer number at temporal level
param.iSpatialLayerNum = 1; // layer number at spatial level
param.bEnableDenoise = 0; // denoise control
param.bEnableBackgroundDetection = 1; // background detection control
param.bEnableAdaptiveQuant = 1; // adaptive quantization control
param.bEnableLongTermReference = 0; // long term reference control
param.iLtrMarkPeriod = 30;
param.iComplexityMode = MEDIUM_COMPLEXITY;
param.uiIntraPeriod = FPS * 3; // period of Intra frame
param.bEnableSpsPpsIdAddition = 0;
param.bPrefixNalAddingCtrl = 0;
int iIndexLayer = 0;
param.sSpatialLayers[iIndexLayer].iVideoWidth = 1280;
param.sSpatialLayers[iIndexLayer].iVideoHeight = 720;
param.sSpatialLayers[iIndexLayer].fFrameRate = (double) (FPS * 1.0f);
// param.sSpatialLayers[iIndexLayer].iQualityLayerNum = 1;
param.sSpatialLayers[iIndexLayer].iSpatialBitrate = 1280 * 720 * 8;
#ifdef MT_ENABLED
param.sSpatialLayers[iIndexLayer].sSliceCfg.uiSliceMode = SM_DYN_SLICE;
param.sSpatialLayers[iIndexLayer].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = SLICE_SIZE;
#endif
float fMaxFr = param.sSpatialLayers[param.iSpatialLayerNum - 1].fFrameRate;
for (int32_t i = param.iSpatialLayerNum - 2; i >= 0; --i) {
if (param.sSpatialLayers[i].fFrameRate > fMaxFr + EPSN) {
fMaxFr = param.sSpatialLayers[i].fFrameRate;
}
}
param.fMaxFrameRate = fMaxFr;
return 0;
}
// return none-zero on error
long set_decoder_options(ISVCDecoder *decoder)
{
int32_t iColorFormat = videoFormatI420;
// EBufferProperty eOutputProperty = BUFFER_HOST;
long ret = 0;
ret += decoder->SetOption(DECODER_OPTION_DATAFORMAT, &iColorFormat);
// ret += decoder->SetOption(DECODER_OPTION_OUTPUT_PROPERTY, &eOutputProperty);
return ret;
}
static switch_size_t buffer_h264_nalu(h264_codec_context_t *context, switch_frame_t *frame)
{
uint8_t nalu_idc = 0;
uint8_t nalu_type = 0;
uint8_t *data = (uint8_t *)frame->data;
uint8_t nalu_hdr = *data;
uint8_t sync_bytes[] = {0, 0, 0, 1};
switch_buffer_t *buffer = context->nalu_buffer;
switch_size_t size = 0;
switch_assert(frame);
nalu_idc = (nalu_hdr & 0x60) >> 5;
nalu_type = nalu_hdr & 0x1f;
if (!context->got_sps && nalu_type != 7) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Waiting SPS/PPS\n");
return 0;
}
if (!context->got_sps) context->got_sps = 1;
size = switch_buffer_write(buffer, sync_bytes, sizeof(sync_bytes));
size = switch_buffer_write(buffer, frame->data, frame->datalen);
#ifdef DEBUG_H264
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "ts: %ld len: %4d %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x mark=%d size=%d\n",
(frame)->timestamp, (frame)->datalen,
*((uint8_t *)(frame)->data), *((uint8_t *)(frame)->data + 1),
*((uint8_t *)(frame)->data + 2), *((uint8_t *)(frame)->data + 3),
*((uint8_t *)(frame)->data + 4), *((uint8_t *)(frame)->data + 5),
*((uint8_t *)(frame)->data + 6), *((uint8_t *)(frame)->data + 7),
*((uint8_t *)(frame)->data + 8), *((uint8_t *)(frame)->data + 9),
*((uint8_t *)(frame)->data + 10), (frame)->m, size);
#endif
return size;
}
static switch_status_t nalu_slice(h264_codec_context_t *context, switch_frame_t *frame)
{
int nalu_len;
uint8_t *buffer;
switch_status_t status = SWITCH_STATUS_SUCCESS;
frame->m = SWITCH_FALSE;
if (context->cur_nalu_index >= context->bit_stream_info.sLayerInfo[context->cur_layer].iNalCount) {
context->cur_nalu_index = 0;
context->cur_layer++;
context->last_nalu_data_pos = 0;
}
#if 0
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "uiTemporalId:%d uiSpatialId:%d uiQualityId:%d uiLayerType:%d FrameType: %d\n",
context->bit_stream_info.sLayerInfo[context->cur_layer].uiTemporalId,
context->bit_stream_info.sLayerInfo[context->cur_layer].uiSpatialId,
context->bit_stream_info.sLayerInfo[context->cur_layer].uiQualityId,
context->bit_stream_info.sLayerInfo[context->cur_layer].uiLayerType,
context->last_frame_type);
#endif
if (context->last_frame_type == videoFrameTypeSkip ||
context->cur_layer >= context->bit_stream_info.iLayerNum) {
frame->datalen = 0;
frame->m = SWITCH_TRUE;
context->cur_layer = 0;
context->cur_nalu_index = 0;
return status;
}
nalu_len = context->bit_stream_info.sLayerInfo[context->cur_layer].pNalLengthInByte[context->cur_nalu_index] - 4; // NALU w/o sync bits
buffer = context->bit_stream_info.sLayerInfo[context->cur_layer].pBsBuf;
#if 0
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "layer: %d/%d nalu:%d/%d nalu_len:%d/%d\n",
context->cur_layer, context->bit_stream_info.iLayerNum,
context->cur_nalu_index, context->bit_stream_info.sLayerInfo[context->cur_layer].iNalCount,
nalu_len, context->last_nalu_data_pos);
#endif
switch_assert(nalu_len > 0);
if (nalu_len <= SLICE_SIZE) {
uint8_t nalu_type;
context->last_nalu_data_pos += 4;
nalu_type = *(buffer + context->last_nalu_data_pos) & 0x1f;
// if (nalu_type == 7) switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Got SPS\n");
memcpy(frame->data, (buffer + context->last_nalu_data_pos), nalu_len);
frame->datalen = nalu_len;
// *flag |= (nalu_type == 6 || nalu_type == 7 || nalu_type == 8 || (nalu_type == 0xe && context->last_nalu_type == 8)) ? 0 : SFF_MARKER;
if ((context->cur_nalu_index == context->bit_stream_info.sLayerInfo[context->cur_layer].iNalCount - 1) &&
(context->cur_layer == context->bit_stream_info.iLayerNum - 1)) {
frame->m = SWITCH_TRUE;
} else {
status = SWITCH_STATUS_MORE_DATA;
}
context->cur_nalu_index++;
context->last_nalu_data_pos += nalu_len;
context->last_nalu_type = nalu_type;
goto end;
} else {
int left = nalu_len;
uint8_t *p = (uint8_t *) frame->data;
if (context->nalu_eat) {
left = nalu_len + 4 - context->nalu_eat;
switch_assert(left > 0);
}
if (left > (SLICE_SIZE - 2)) {
uint8_t start_bit;
if (context->nalu_eat) {
start_bit = 0;
} else {
start_bit = 0x80;
context->last_nalu_data_pos += 4;
context->last_nalu_type = *(buffer + context->last_nalu_data_pos) & 0x1f;
context->last_nri = context->last_nalu_type & 0x60;
context->last_nalu_data_pos++;
context->nalu_eat = 5;
}
p[0] = context->last_nri | 28; // FU-A
p[1] = start_bit | context->last_nalu_type;
memcpy(p + 2, buffer + context->last_nalu_data_pos, SLICE_SIZE - 2);
context->last_nalu_data_pos += (SLICE_SIZE - 2);
context->nalu_eat += (SLICE_SIZE - 2);
frame->datalen = SLICE_SIZE;
status = SWITCH_STATUS_MORE_DATA;
goto end;
} else {
p[0] = context->last_nri | 28; // FU-A
p[1] = 0x40 | context->last_nalu_type;
memcpy(p + 2, buffer + context->last_nalu_data_pos, left);
context->last_nalu_data_pos += left;
frame->datalen = left + 2;
frame->m = SWITCH_TRUE;
context->nalu_eat = 0;
context->cur_nalu_index++;
status = SWITCH_STATUS_SUCCESS;
goto end;
}
}
end:
return status;
}
static switch_status_t switch_h264_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
{
h264_codec_context_t *context = NULL;
int encoding, decoding;
int ret;
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
if (!(encoding || decoding)) {
return SWITCH_STATUS_FALSE;
}
if (codec->fmtp_in) {
codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
}
context = (h264_codec_context_t*)switch_core_alloc(codec->memory_pool, sizeof(h264_codec_context_t));
memset(context, 0, sizeof(*context));
if (decoding) {
WelsCreateDecoder(&context->decoder);
if (!context->decoder) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "CreateDecoder Error\n");
return SWITCH_STATUS_FALSE;
}
context->decoder_params.eOutputColorFormat = videoFormatI420;
context->decoder_params.uiTargetDqLayer = (uint8_t) -1;
context->decoder_params.eEcActiveIdc = ERROR_CON_SLICE_COPY;
context->decoder_params.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_AVC;
context->decoder_params.sVideoProperty.size = sizeof(context->decoder_params.sVideoProperty);
if (context->decoder->Initialize(&context->decoder_params)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Decoder Initialize failed\n");
goto error;
}
if (set_decoder_options(context->decoder)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Set Decoder Option Error\n");
}
}
if (encoding) {
ret = WelsCreateSVCEncoder(&context->encoder);
if (ret) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Cannot create encoder, error: %d\n", ret);
goto error;
}
FillSpecificParameters(context->encoder_params);
}
//if (encoding | decoding) WelsStderrSetTraceLevel(10);
switch_buffer_create_dynamic(&(context->nalu_buffer), H264_NALU_BUFFER_SIZE, H264_NALU_BUFFER_SIZE * 8, 0);
codec->private_info = context;
return SWITCH_STATUS_SUCCESS;
error:
// TODO, do some proper clean up
return SWITCH_STATUS_FALSE;
}
static switch_status_t init_encoder(h264_codec_context_t *context, uint32_t width, uint32_t height)
{
int i;
context->encoder_params.iPicWidth = width;
context->encoder_params.iPicHeight = height;
for (int i=0; i<context->encoder_params.iSpatialLayerNum; i++) {
context->encoder_params.sSpatialLayers[i].iVideoWidth = width;
context->encoder_params.sSpatialLayers[i].iVideoHeight = height;
}
/* just do it, the encoder will Uninitialize first by itself if already initialized */
if (cmResultSuccess != context->encoder->InitializeExt(&context->encoder_params)) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Encoder Init Error\n");
return SWITCH_STATUS_FALSE;
}
context->encoder_initialized = SWITCH_TRUE;
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t switch_h264_encode(switch_codec_t *codec, switch_frame_t *frame)
{
h264_codec_context_t *context = (h264_codec_context_t *)codec->private_info;
int width = 0;
int height = 0;
long enc_ret;
SSourcePicture* pic = NULL;
long result;
frame->m = SWITCH_FALSE;
if (context->need_key_frame) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_NOTICE, "H264 KEYFRAME GENERATED\n");
context->encoder->ForceIntraFrame(1);
context->need_key_frame = 0;
}
if (frame->flags & SFF_SAME_IMAGE) {
return nalu_slice(context, frame);
}
if (frame->img->d_h > 1) {
width = frame->img->d_w;
height = frame->img->d_h;
} else {
width = frame->img->w;
height = frame->img->h;
}
//switch_assert(width > 0 && (width % 2 == 0));
//switch_assert(height > 0 && (height % 2 == 0));
if (!context->encoder_initialized) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "initializing encoder %dx%d\n", width, height);
init_encoder(context, width, height);
}
if (width != context->encoder_params.iPicWidth || height != context->encoder_params.iPicHeight ) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "picture size changed from %dx%d to %dx%d, reinitializing encoder",
context->encoder_params.iPicWidth, context->encoder_params.iPicHeight, width, height);
init_encoder(context, width, height);
}
pic = new SSourcePicture;
if (pic == NULL) goto error;
pic->iColorFormat = videoFormatI420;
pic->iPicHeight = height;
pic->iPicWidth = width;
pic->iStride[0] = frame->img->stride[0];
pic->iStride[1] = frame->img->stride[1]; // = frame->img->stride[2];
pic->pData[0] = frame->img->planes[0];
pic->pData[1] = frame->img->planes[1];
pic->pData[2] = frame->img->planes[2];
result = (EVideoFrameType)context->encoder->EncodeFrame(pic, &context->bit_stream_info);
if (result != cmResultSuccess ) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "EncodeFrame() failed, result = %ld\n", result);
goto error;
}
context->cur_layer = 0;
context->cur_nalu_index = 0;
context->last_nalu_data_pos = 0;
if (pic){
delete pic;
pic = NULL;
}
return nalu_slice(context, frame);
error:
if(pic){
delete pic;
pic = NULL;
}
frame->datalen = 0;
return SWITCH_STATUS_FALSE;
}
static switch_status_t switch_h264_decode(switch_codec_t *codec, switch_frame_t *frame)
{
h264_codec_context_t *context = (h264_codec_context_t *)codec->private_info;
switch_size_t size = 0;
uint32_t error_code;
switch_status_t status = SWITCH_STATUS_SUCCESS;
// switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "len: %d ts: %u mark:%d\n", frame->datalen, ntohl(frame->timestamp), frame->m);
if (0 && context->last_received_timestamp && context->last_received_timestamp != frame->timestamp &&
(!frame->m) && (!context->last_received_complete_picture)) {
// possible packet loss
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Packet Loss, skip privousely received packets\n");
switch_goto_status(SWITCH_STATUS_RESTART, end);
}
context->last_received_timestamp = frame->timestamp;
context->last_received_complete_picture = frame->m ? SWITCH_TRUE : SWITCH_FALSE;
size = buffer_h264_nalu(context, frame);
//printf("READ buf:%ld got_key:%d st:%d m:%d\n", size, context->got_sps, status, frame->m);
if (frame->m && size) {
int got_picture = 0;
int decoded_len;
int i;
const void *nalu = NULL;
int width, height;
SBufferInfo dest_buffer_info;
switch_buffer_peek_zerocopy(context->nalu_buffer, &nalu);
uint8_t* pData[3] = { 0 };
frame->m = SWITCH_FALSE;
frame->flags = 0;
pData[0] = NULL;
pData[1] = NULL;
pData[2] = NULL;
memset(&dest_buffer_info, 0, sizeof(dest_buffer_info));
error_code = context->decoder->DecodeFrame2((uint8_t *)nalu, size, (uint8_t **)pData, &dest_buffer_info);
if (error_code == dsErrorFree && dest_buffer_info.iBufferStatus == 1) {
width = dest_buffer_info.UsrData.sSystemBuffer.iWidth;
height = dest_buffer_info.UsrData.sSystemBuffer.iHeight;
// switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "got pic: [%dx%d]\n", width, height);
if (!context->img) {
context->img = switch_img_wrap(NULL, SWITCH_IMG_FMT_I420, width, height, 0, pData[0]);
assert(context->img);
}
context->img->w = dest_buffer_info.UsrData.sSystemBuffer.iStride[0];
context->img->h = dest_buffer_info.UsrData.sSystemBuffer.iStride[1];
context->img->d_w = width;
context->img->d_h = height;
context->img->planes[0] = pData[0];
context->img->planes[1] = pData[1];
context->img->planes[2] = pData[2];
context->img->stride[0] = dest_buffer_info.UsrData.sSystemBuffer.iStride[0];
context->img->stride[1] = dest_buffer_info.UsrData.sSystemBuffer.iStride[1];
context->img->stride[2] = dest_buffer_info.UsrData.sSystemBuffer.iStride[1];
frame->img = context->img;
// TODO: keep going and see if more picture available
// pDecoder->DecodeFrame (NULL, 0, pData, &sDstBufInfo);
} else {
if (error_code) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Decode error: 0x%x\n", error_code);
switch_goto_status(SWITCH_STATUS_RESTART, end);
}
}
switch_buffer_zero(context->nalu_buffer);
status = SWITCH_STATUS_SUCCESS;
}
end:
if (size == 0) {
status = SWITCH_STATUS_MORE_DATA;
}
if (status == SWITCH_STATUS_RESTART) {
context->got_sps = 0;
switch_buffer_zero(context->nalu_buffer);
}
if (!context->got_sps) {
switch_set_flag(frame, SFF_WAIT_KEY_FRAME);
}
if (frame->img) {
switch_set_flag(frame, SFF_USE_VIDEO_TIMESTAMP);
} else {
status = SWITCH_STATUS_MORE_DATA;
}
return status;
}
static switch_status_t switch_h264_control(switch_codec_t *codec,
switch_codec_control_command_t cmd,
switch_codec_control_type_t ctype,
void *cmd_data,
switch_codec_control_type_t *rtype,
void **ret_data) {
h264_codec_context_t *context = (h264_codec_context_t *)codec->private_info;
switch(cmd) {
case SCC_VIDEO_REFRESH:
context->need_key_frame = 1;
break;
default:
break;
}
return SWITCH_STATUS_SUCCESS;
}
static switch_status_t switch_h264_destroy(switch_codec_t *codec)
{
h264_codec_context_t *context = (h264_codec_context_t *)codec->private_info;
if (!context) return SWITCH_STATUS_SUCCESS;
if (context->nalu_buffer) switch_buffer_destroy(&context->nalu_buffer);
if (context->encoder) {
context->encoder->Uninitialize();
WelsDestroySVCEncoder(context->encoder);
}
if (context->decoder) {
switch_img_free(&context->img);
context->decoder->Uninitialize();
WelsDestroyDecoder(context->decoder);
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_MODULE_LOAD_FUNCTION(mod_openh264_load)
{
switch_codec_interface_t *codec_interface;
/* connect my internal structure to the blank pointer passed to me */
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
SWITCH_ADD_CODEC(codec_interface, "H264 Video (with Cisco OpenH264)");
switch_core_codec_add_video_implementation(pool, codec_interface, 99, "H264", NULL,
switch_h264_init, switch_h264_encode, switch_h264_decode, switch_h264_control, switch_h264_destroy);
/* indicate that the module should continue to be loaded */
return SWITCH_STATUS_SUCCESS;
}
/* For Emacs:
* Local Variables:
* mode:c
* indent-tabs-mode:t
* tab-width:4
* c-basic-offset:4
* End:
* For VIM:
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
*/
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