--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/avwrapper.c Sun Sep 16 16:54:51 2012 +0200
@@ -0,0 +1,515 @@
+/*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * 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 <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdarg.h>
+#include "libavformat/avformat.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;
+
+/*
+Initially I wrote code for latest ffmpeg, but on Linux (Ubuntu)
+only older version is available from repository. That's why you see here
+all of this #if LIBAVCODEC_VERSION_MAJOR < 54.
+Actually, it may be possible to remove code for newer version
+and use only code for older version.
+*/
+
+#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, ...)
+{
+ const 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)
+{
+ const char Buffer[1024];
+
+ vsnprintf(Buffer, 1024, pFmt, VaArgs);
+ AddFileLogRaw(Buffer);
+}
+
+static void Log(const char* pFmt, ...)
+{
+ const 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 >= 54
+ 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 >= 54
+ 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 >= 54
+ 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 < 54
+ // 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);
+}