diff -r 8ce66f1106f1 -r dcdfcddf37ee hedgewars/avwrapper/avwrapper.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hedgewars/avwrapper/avwrapper.c Tue Mar 19 17:14:10 2013 +0100 @@ -0,0 +1,509 @@ +/* + * Hedgewars, a free turn based strategy game + * Copyright (c) 2004-2012 Andrey Korotaev + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include +#include +#include +#include +#include +#include "libavformat/avformat.h" +#include "libavutil/mathematics.h" + +#ifndef AVIO_FLAG_WRITE +#define AVIO_FLAG_WRITE AVIO_WRONLY +#endif + +static AVFormatContext* g_pContainer; +static AVOutputFormat* g_pFormat; +static AVStream* g_pAStream; +static AVStream* g_pVStream; +static AVFrame* g_pAFrame; +static AVFrame* g_pVFrame; +static AVCodec* g_pACodec; +static AVCodec* g_pVCodec; +static AVCodecContext* g_pAudio; +static AVCodecContext* g_pVideo; + +static int g_Width, g_Height; +static uint32_t g_Frequency, g_Channels; +static int g_VQuality; +static AVRational g_Framerate; + +static FILE* g_pSoundFile; +static int16_t* g_pSamples; +static int g_NumSamples; + + +#if LIBAVCODEC_VERSION_MAJOR < 54 +#define OUTBUFFER_SIZE 200000 +static uint8_t g_OutBuffer[OUTBUFFER_SIZE]; +#endif + +// pointer to function from hwengine (uUtils.pas) +static void (*AddFileLogRaw)(const char* pString); + +static void FatalError(const char* pFmt, ...) +{ + char Buffer[1024]; + va_list VaArgs; + + va_start(VaArgs, pFmt); + vsnprintf(Buffer, 1024, pFmt, VaArgs); + va_end(VaArgs); + + AddFileLogRaw("Error in av-wrapper: "); + AddFileLogRaw(Buffer); + AddFileLogRaw("\n"); + exit(1); +} + +// Function to be called from libav for logging. +// Note: libav can call LogCallback from different threads +// (there is mutex in AddFileLogRaw). +static void LogCallback(void* p, int Level, const char* pFmt, va_list VaArgs) +{ + char Buffer[1024]; + + vsnprintf(Buffer, 1024, pFmt, VaArgs); + AddFileLogRaw(Buffer); +} + +static void Log(const char* pFmt, ...) +{ + char Buffer[1024]; + va_list VaArgs; + + va_start(VaArgs, pFmt); + vsnprintf(Buffer, 1024, pFmt, VaArgs); + va_end(VaArgs); + + AddFileLogRaw(Buffer); +} + +static void AddAudioStream() +{ +#if LIBAVFORMAT_VERSION_MAJOR >= 53 + g_pAStream = avformat_new_stream(g_pContainer, g_pACodec); +#else + g_pAStream = av_new_stream(g_pContainer, 1); +#endif + if(!g_pAStream) + { + Log("Could not allocate audio stream\n"); + return; + } + g_pAStream->id = 1; + + g_pAudio = g_pAStream->codec; + + avcodec_get_context_defaults3(g_pAudio, g_pACodec); + g_pAudio->codec_id = g_pACodec->id; + + // put parameters + g_pAudio->sample_fmt = AV_SAMPLE_FMT_S16; + g_pAudio->sample_rate = g_Frequency; + g_pAudio->channels = g_Channels; + + // set quality + g_pAudio->bit_rate = 160000; + + // for codecs that support variable bitrate use it, it should be better + g_pAudio->flags |= CODEC_FLAG_QSCALE; + g_pAudio->global_quality = 1*FF_QP2LAMBDA; + + // some formats want stream headers to be separate + if (g_pFormat->flags & AVFMT_GLOBALHEADER) + g_pAudio->flags |= CODEC_FLAG_GLOBAL_HEADER; + + // open it +#if LIBAVCODEC_VERSION_MAJOR >= 53 + if (avcodec_open2(g_pAudio, g_pACodec, NULL) < 0) +#else + if (avcodec_open(g_pAudio, g_pACodec) < 0) +#endif + { + Log("Could not open audio codec %s\n", g_pACodec->long_name); + return; + } + +#if LIBAVCODEC_VERSION_MAJOR >= 54 + if (g_pACodec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE) +#else + if (g_pAudio->frame_size == 0) +#endif + g_NumSamples = 4096; + else + g_NumSamples = g_pAudio->frame_size; + g_pSamples = (int16_t*)av_malloc(g_NumSamples*g_Channels*sizeof(int16_t)); + g_pAFrame = avcodec_alloc_frame(); + if (!g_pAFrame) + { + Log("Could not allocate frame\n"); + return; + } +} + +// returns non-zero if there is more sound +static int WriteAudioFrame() +{ + if (!g_pAStream) + return 0; + + AVPacket Packet = { 0 }; + av_init_packet(&Packet); + + int NumSamples = fread(g_pSamples, 2*g_Channels, g_NumSamples, g_pSoundFile); + +#if LIBAVCODEC_VERSION_MAJOR >= 53 + AVFrame* pFrame = NULL; + if (NumSamples > 0) + { + g_pAFrame->nb_samples = NumSamples; + avcodec_fill_audio_frame(g_pAFrame, g_Channels, AV_SAMPLE_FMT_S16, + (uint8_t*)g_pSamples, NumSamples*2*g_Channels, 1); + pFrame = g_pAFrame; + } + // when NumSamples == 0 we still need to call encode_audio2 to flush + int got_packet; + if (avcodec_encode_audio2(g_pAudio, &Packet, pFrame, &got_packet) != 0) + FatalError("avcodec_encode_audio2 failed"); + if (!got_packet) + return 0; +#else + if (NumSamples == 0) + return 0; + int BufferSize = OUTBUFFER_SIZE; + if (g_pAudio->frame_size == 0) + BufferSize = NumSamples*g_Channels*2; + Packet.size = avcodec_encode_audio(g_pAudio, g_OutBuffer, BufferSize, g_pSamples); + if (Packet.size == 0) + return 1; + if (g_pAudio->coded_frame && g_pAudio->coded_frame->pts != AV_NOPTS_VALUE) + Packet.pts = av_rescale_q(g_pAudio->coded_frame->pts, g_pAudio->time_base, g_pAStream->time_base); + Packet.flags |= AV_PKT_FLAG_KEY; + Packet.data = g_OutBuffer; +#endif + + // Write the compressed frame to the media file. + Packet.stream_index = g_pAStream->index; + if (av_interleaved_write_frame(g_pContainer, &Packet) != 0) + FatalError("Error while writing audio frame"); + return 1; +} + +// add a video output stream +static void AddVideoStream() +{ +#if LIBAVFORMAT_VERSION_MAJOR >= 53 + g_pVStream = avformat_new_stream(g_pContainer, g_pVCodec); +#else + g_pVStream = av_new_stream(g_pContainer, 0); +#endif + if (!g_pVStream) + FatalError("Could not allocate video stream"); + + g_pVideo = g_pVStream->codec; + + avcodec_get_context_defaults3(g_pVideo, g_pVCodec); + g_pVideo->codec_id = g_pVCodec->id; + + // put parameters + // resolution must be a multiple of two + g_pVideo->width = g_Width & ~1; // make even (dimensions should be even) + g_pVideo->height = g_Height & ~1; // make even + /* time base: this is the fundamental unit of time (in seconds) in terms + of which frame timestamps are represented. for fixed-fps content, + timebase should be 1/framerate and timestamp increments should be + identically 1. */ + g_pVideo->time_base.den = g_Framerate.num; + g_pVideo->time_base.num = g_Framerate.den; + //g_pVideo->gop_size = 12; /* emit one intra frame every twelve frames at most */ + g_pVideo->pix_fmt = PIX_FMT_YUV420P; + + // set quality + if (g_VQuality > 100) + g_pVideo->bit_rate = g_VQuality; + else + { + g_pVideo->flags |= CODEC_FLAG_QSCALE; + g_pVideo->global_quality = g_VQuality*FF_QP2LAMBDA; + } + + // some formats want stream headers to be separate + if (g_pFormat->flags & AVFMT_GLOBALHEADER) + g_pVideo->flags |= CODEC_FLAG_GLOBAL_HEADER; + +#if LIBAVCODEC_VERSION_MAJOR < 53 + // for some versions of ffmpeg x264 options must be set explicitly + if (strcmp(g_pVCodec->name, "libx264") == 0) + { + g_pVideo->coder_type = FF_CODER_TYPE_AC; + g_pVideo->flags |= CODEC_FLAG_LOOP_FILTER; + g_pVideo->crf = 23; + g_pVideo->thread_count = 3; + g_pVideo->me_cmp = FF_CMP_CHROMA; + g_pVideo->partitions = X264_PART_I8X8 | X264_PART_I4X4 | X264_PART_P8X8 | X264_PART_B8X8; + g_pVideo->me_method = ME_HEX; + g_pVideo->me_subpel_quality = 7; + g_pVideo->me_range = 16; + g_pVideo->gop_size = 250; + g_pVideo->keyint_min = 25; + g_pVideo->scenechange_threshold = 40; + g_pVideo->i_quant_factor = 0.71; + g_pVideo->b_frame_strategy = 1; + g_pVideo->qcompress = 0.6; + g_pVideo->qmin = 10; + g_pVideo->qmax = 51; + g_pVideo->max_qdiff = 4; + g_pVideo->max_b_frames = 3; + g_pVideo->refs = 3; + g_pVideo->directpred = 1; + g_pVideo->trellis = 1; + g_pVideo->flags2 = CODEC_FLAG2_BPYRAMID | CODEC_FLAG2_MIXED_REFS | CODEC_FLAG2_WPRED | CODEC_FLAG2_8X8DCT | CODEC_FLAG2_FASTPSKIP; + g_pVideo->weighted_p_pred = 2; + } +#endif + + // open the codec +#if LIBAVCODEC_VERSION_MAJOR >= 53 + AVDictionary* pDict = NULL; + if (strcmp(g_pVCodec->name, "libx264") == 0) + av_dict_set(&pDict, "preset", "medium", 0); + + if (avcodec_open2(g_pVideo, g_pVCodec, &pDict) < 0) +#else + if (avcodec_open(g_pVideo, g_pVCodec) < 0) +#endif + FatalError("Could not open video codec %s", g_pVCodec->long_name); + + g_pVFrame = avcodec_alloc_frame(); + if (!g_pVFrame) + FatalError("Could not allocate frame"); + + g_pVFrame->linesize[0] = g_Width; + g_pVFrame->linesize[1] = g_Width/2; + g_pVFrame->linesize[2] = g_Width/2; + g_pVFrame->linesize[3] = 0; +} + +static int WriteFrame(AVFrame* pFrame) +{ + double AudioTime, VideoTime; + + // write interleaved audio frame + if (g_pAStream) + { + VideoTime = (double)g_pVStream->pts.val*g_pVStream->time_base.num/g_pVStream->time_base.den; + do + AudioTime = (double)g_pAStream->pts.val*g_pAStream->time_base.num/g_pAStream->time_base.den; + while (AudioTime < VideoTime && WriteAudioFrame()); + } + + if (!g_pVStream) + return 0; + + AVPacket Packet; + av_init_packet(&Packet); + Packet.data = NULL; + Packet.size = 0; + + g_pVFrame->pts++; + if (g_pFormat->flags & AVFMT_RAWPICTURE) + { + /* raw video case. The API will change slightly in the near + future for that. */ + Packet.flags |= AV_PKT_FLAG_KEY; + Packet.stream_index = g_pVStream->index; + Packet.data = (uint8_t*)pFrame; + Packet.size = sizeof(AVPicture); + + if (av_interleaved_write_frame(g_pContainer, &Packet) != 0) + FatalError("Error while writing video frame"); + return 0; + } + else + { +#if LIBAVCODEC_VERSION_MAJOR >= 54 + int got_packet; + if (avcodec_encode_video2(g_pVideo, &Packet, pFrame, &got_packet) < 0) + FatalError("avcodec_encode_video2 failed"); + if (!got_packet) + return 0; + + if (Packet.pts != AV_NOPTS_VALUE) + Packet.pts = av_rescale_q(Packet.pts, g_pVideo->time_base, g_pVStream->time_base); + if (Packet.dts != AV_NOPTS_VALUE) + Packet.dts = av_rescale_q(Packet.dts, g_pVideo->time_base, g_pVStream->time_base); +#else + Packet.size = avcodec_encode_video(g_pVideo, g_OutBuffer, OUTBUFFER_SIZE, pFrame); + if (Packet.size < 0) + FatalError("avcodec_encode_video failed"); + if (Packet.size == 0) + return 0; + + if( g_pVideo->coded_frame->pts != AV_NOPTS_VALUE) + Packet.pts = av_rescale_q(g_pVideo->coded_frame->pts, g_pVideo->time_base, g_pVStream->time_base); + if( g_pVideo->coded_frame->key_frame ) + Packet.flags |= AV_PKT_FLAG_KEY; + Packet.data = g_OutBuffer; +#endif + // write the compressed frame in the media file + Packet.stream_index = g_pVStream->index; + if (av_interleaved_write_frame(g_pContainer, &Packet) != 0) + FatalError("Error while writing video frame"); + + return 1; + } +} + +void AVWrapper_WriteFrame(uint8_t* pY, uint8_t* pCb, uint8_t* pCr) +{ + g_pVFrame->data[0] = pY; + g_pVFrame->data[1] = pCb; + g_pVFrame->data[2] = pCr; + WriteFrame(g_pVFrame); +} + +void AVWrapper_Init( + void (*pAddFileLogRaw)(const char*), + const char* pFilename, + const char* pDesc, + const char* pSoundFile, + const char* pFormatName, + const char* pVCodecName, + const char* pACodecName, + int Width, int Height, + int FramerateNum, int FramerateDen, + int VQuality) +{ + AddFileLogRaw = pAddFileLogRaw; + av_log_set_callback( &LogCallback ); + + g_Width = Width; + g_Height = Height; + g_Framerate.num = FramerateNum; + g_Framerate.den = FramerateDen; + g_VQuality = VQuality; + + // initialize libav and register all codecs and formats + av_register_all(); + + // find format + g_pFormat = av_guess_format(pFormatName, NULL, NULL); + if (!g_pFormat) + FatalError("Format \"%s\" was not found", pFormatName); + + // allocate the output media context + g_pContainer = avformat_alloc_context(); + if (!g_pContainer) + FatalError("Could not allocate output context"); + + g_pContainer->oformat = g_pFormat; + + // store description of file + av_dict_set(&g_pContainer->metadata, "comment", pDesc, 0); + + // append extesnion to filename + char ext[16]; + strncpy(ext, g_pFormat->extensions, 16); + ext[15] = 0; + ext[strcspn(ext,",")] = 0; + snprintf(g_pContainer->filename, sizeof(g_pContainer->filename), "%s.%s", pFilename, ext); + + // find codecs + g_pVCodec = avcodec_find_encoder_by_name(pVCodecName); + g_pACodec = avcodec_find_encoder_by_name(pACodecName); + + // add audio and video stream to container + g_pVStream = NULL; + g_pAStream = NULL; + + if (g_pVCodec) + AddVideoStream(); + else + Log("Video codec \"%s\" was not found; video will be ignored.\n", pVCodecName); + + if (g_pACodec) + { + g_pSoundFile = fopen(pSoundFile, "rb"); + if (g_pSoundFile) + { + fread(&g_Frequency, 4, 1, g_pSoundFile); + fread(&g_Channels, 4, 1, g_pSoundFile); + AddAudioStream(); + } + else + Log("Could not open %s\n", pSoundFile); + } + else + Log("Audio codec \"%s\" was not found; audio will be ignored.\n", pACodecName); + + if (!g_pAStream && !g_pVStream) + FatalError("No video, no audio, aborting..."); + + // write format info to log + av_dump_format(g_pContainer, 0, g_pContainer->filename, 1); + + // open the output file, if needed + if (!(g_pFormat->flags & AVFMT_NOFILE)) + { + if (avio_open(&g_pContainer->pb, g_pContainer->filename, AVIO_FLAG_WRITE) < 0) + FatalError("Could not open output file (%s)", g_pContainer->filename); + } + + // write the stream header, if any + avformat_write_header(g_pContainer, NULL); + + g_pVFrame->pts = -1; +} + +void AVWrapper_Close() +{ + // output buffered frames + if (g_pVCodec->capabilities & CODEC_CAP_DELAY) + while( WriteFrame(NULL) ); + // output any remaining audio + while( WriteAudioFrame() ); + + // write the trailer, if any. + av_write_trailer(g_pContainer); + + // close the output file + if (!(g_pFormat->flags & AVFMT_NOFILE)) + avio_close(g_pContainer->pb); + + // free everything + if (g_pVStream) + { + avcodec_close(g_pVideo); + av_free(g_pVideo); + av_free(g_pVStream); + av_free(g_pVFrame); + } + if (g_pAStream) + { + avcodec_close(g_pAudio); + av_free(g_pAudio); + av_free(g_pAStream); + av_free(g_pAFrame); + av_free(g_pSamples); + fclose(g_pSoundFile); + } + + av_free(g_pContainer); +}