mirror of https://github.com/mgba-emu/mgba.git
Rough FFmpeg video encoder
This commit is contained in:
Jeffrey Pfau
parent
6291a62860
commit
88695a5ab1
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@ -5,6 +5,7 @@ set(CMAKE_C_FLAGS_DEBUG "-g -Wall -Wextra -std=gnu99")
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set(CMAKE_C_FLAGS_RELEASE "-O3 -Wall -Wextra -std=gnu99")
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set(USE_CLI_DEBUGGER ON CACHE BOOL "Whether or not to enable the CLI-mode ARM debugger")
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set(USE_GDB_STUB ON CACHE BOOL "Whether or not to enable the GDB stub ARM debugger")
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set(USE_FFMPEG ON CACHE BOOL "Whether or not to enable FFmpeg support")
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set(BUILD_SDL ON CACHE BOOL "Build SDL frontend")
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set(BUILD_PERF ON CACHE BOOL "Build performance profiling tool")
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file(GLOB ARM_SRC ${CMAKE_SOURCE_DIR}/src/arm/*.c)
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@ -84,6 +85,15 @@ if(USE_GDB_STUB)
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add_definitions(-DUSE_GDB_STUB)
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set(DEBUGGER_SRC "${DEBUGGER_SRC};${CMAKE_SOURCE_DIR}/src/debugger/gdb-stub.c")
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endif()
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if(USE_FFMPEG)
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pkg_search_module(LIBAVCODEC libavcodec REQUIRED)
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pkg_search_module(LIBAVFORMAT libavformat REQUIRED)
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pkg_search_module(LIBAVUTIL libavutil REQUIRED)
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add_definitions(-DUSE_FFMPEG)
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list(APPEND UTIL_SRC "${CMAKE_SOURCE_DIR}/src/platform/ffmpeg/ffmpeg-encoder.c")
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list(APPEND DEPENDENCY_LIB ${LIBAVCODEC_LIBRARIES} ${LIBAVFORMAT_LIBRARIES} ${LIBAVUTIL_LIBRARIES})
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endif()
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source_group("ARM debugger" FILES ${DEBUGGER_SRC})
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add_library(${BINARY_NAME} SHARED ${ARM_SRC} ${GBA_SRC} ${DEBUGGER_SRC} ${RENDERER_SRC} ${UTIL_SRC} ${VFS_SRC} ${OS_SRC})
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@ -704,6 +704,10 @@ static void _sample(struct GBAAudio* audio) {
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CircleBufferWrite32(&audio->left, sampleLeft);
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CircleBufferWrite32(&audio->right, sampleRight);
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unsigned produced = CircleBufferSize(&audio->left);
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struct GBAThread* thread = GBAThreadGetContext();
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if (thread && thread->stream) {
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thread->stream->postAudioFrame(thread->stream, sampleLeft, sampleRight);
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}
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GBASyncProduceAudio(audio->p->sync, produced >= CircleBufferCapacity(&audio->left) / sizeof(int32_t) * 3);
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}
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@ -559,6 +559,9 @@ void GBASyncPostFrame(struct GBASync* sync) {
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GBARecordFrame(thread);
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}
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}
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if (thread->stream) {
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thread->stream->postVideoFrame(thread->stream, thread->renderer);
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}
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if (thread->frameCallback) {
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thread->frameCallback(thread);
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}
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@ -39,6 +39,11 @@ struct GBASync {
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Mutex audioBufferMutex;
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};
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struct GBAAVStream {
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void (*postVideoFrame)(struct GBAAVStream*, struct GBAVideoRenderer* renderer);
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void (*postAudioFrame)(struct GBAAVStream*, int32_t left, int32_t right);
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};
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struct GBAThread {
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// Output
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enum ThreadState state;
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@ -58,6 +63,7 @@ struct GBAThread {
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const char* fname;
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int activeKeys;
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struct GBAInputMap inputMap;
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struct GBAAVStream* stream;
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// Run-time options
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int frameskip;
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@ -0,0 +1,134 @@
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#include "ffmpeg-encoder.h"
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#include "gba-video.h"
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#include <libavutil/imgutils.h>
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static void _ffmpegPostVideoFrame(struct GBAAVStream*, struct GBAVideoRenderer* renderer);
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static void _ffmpegPostAudioFrame(struct GBAAVStream*, int32_t left, int32_t right);
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bool FFmpegEncoderCreate(struct FFmpegEncoder* encoder) {
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av_register_all();
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AVCodec* acodec = avcodec_find_encoder(AV_CODEC_ID_FLAC);
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AVCodec* vcodec = avcodec_find_encoder(AV_CODEC_ID_HUFFYUV);
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if (!acodec || !vcodec) {
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return false;
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}
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encoder->d.postVideoFrame = _ffmpegPostVideoFrame;
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encoder->d.postAudioFrame = _ffmpegPostAudioFrame;
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encoder->currentAudioSample = 0;
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encoder->currentAudioFrame = 0;
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encoder->currentVideoFrame = 0;
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avformat_alloc_output_context2(&encoder->context, NULL, NULL, "test.mkv");
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encoder->audioStream = avformat_new_stream(encoder->context, acodec);
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encoder->audio = encoder->audioStream->codec;
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encoder->audio->bit_rate = 128000;
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encoder->audio->sample_rate = 0x8000;
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encoder->audio->channels = 2;
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encoder->audio->channel_layout = AV_CH_LAYOUT_STEREO;
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encoder->audio->sample_fmt = AV_SAMPLE_FMT_S16;
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avcodec_open2(encoder->audio, acodec, 0);
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encoder->audioFrame = av_frame_alloc();
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encoder->audioFrame->nb_samples = encoder->audio->frame_size;
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encoder->audioFrame->format = encoder->audio->sample_fmt;
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encoder->audioFrame->pts = 0;
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encoder->audioBufferSize = av_samples_get_buffer_size(0, encoder->audio->channels, encoder->audio->frame_size, encoder->audio->sample_fmt, 0);
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encoder->audioBuffer = av_malloc(encoder->audioBufferSize);
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avcodec_fill_audio_frame(encoder->audioFrame, encoder->audio->channels, encoder->audio->sample_fmt, (const uint8_t*) encoder->audioBuffer, encoder->audioBufferSize, 0);
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encoder->videoStream = avformat_new_stream(encoder->context, vcodec);
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encoder->video = encoder->videoStream->codec;
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encoder->video->bit_rate = 4000000;
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encoder->video->width = VIDEO_HORIZONTAL_PIXELS;
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encoder->video->height = VIDEO_VERTICAL_PIXELS;
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encoder->video->time_base = (AVRational) { VIDEO_TOTAL_LENGTH, GBA_ARM7TDMI_FREQUENCY };
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encoder->video->pix_fmt = AV_PIX_FMT_RGB24;
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encoder->video->gop_size = 15;
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encoder->video->max_b_frames = 0;
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avcodec_open2(encoder->video, vcodec, 0);
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encoder->videoFrame = av_frame_alloc();
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encoder->videoFrame->format = encoder->video->pix_fmt;
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encoder->videoFrame->width = encoder->video->width;
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encoder->videoFrame->height = encoder->video->height;
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encoder->videoFrame->pts = 0;
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av_image_alloc(encoder->videoFrame->data, encoder->videoFrame->linesize, encoder->video->width, encoder->video->height, encoder->video->pix_fmt, 32);
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if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
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encoder->audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
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encoder->video->flags |= CODEC_FLAG_GLOBAL_HEADER;
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}
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avio_open(&encoder->context->pb, "test.mkv", AVIO_FLAG_WRITE);
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avformat_write_header(encoder->context, 0);
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return true;
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}
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void _ffmpegPostAudioFrame(struct GBAAVStream* stream, int32_t left, int32_t right) {
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struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
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av_frame_make_writable(encoder->audioFrame);
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encoder->audioBuffer[encoder->currentAudioSample * 2] = left;
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encoder->audioBuffer[encoder->currentAudioSample * 2 + 1] = right;
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encoder->audioFrame->pts = av_rescale_q(encoder->currentAudioFrame, encoder->audio->time_base, encoder->audioStream->time_base);
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++encoder->currentAudioFrame;
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++encoder->currentAudioSample;
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if ((encoder->currentAudioSample * 4) < encoder->audioBufferSize) {
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return;
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}
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encoder->currentAudioSample = 0;
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AVPacket packet;
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av_init_packet(&packet);
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packet.data = 0;
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packet.size = 0;
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int gotData;
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avcodec_encode_audio2(encoder->audio, &packet, encoder->audioFrame, &gotData);
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if (gotData) {
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packet.stream_index = encoder->audioStream->index;
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av_interleaved_write_frame(encoder->context, &packet);
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}
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av_free_packet(&packet);
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}
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void _ffmpegPostVideoFrame(struct GBAAVStream* stream, struct GBAVideoRenderer* renderer) {
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struct FFmpegEncoder* encoder = (struct FFmpegEncoder*) stream;
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uint32_t* pixels;
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unsigned stride;
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renderer->getPixels(renderer, &stride, (void**) &pixels);
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AVPacket packet;
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av_init_packet(&packet);
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packet.data = 0;
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packet.size = 0;
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av_frame_make_writable(encoder->videoFrame);
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encoder->videoFrame->pts = av_rescale_q(encoder->currentVideoFrame, encoder->video->time_base, encoder->videoStream->time_base);
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++encoder->currentVideoFrame;
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unsigned x, y;
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for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
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for (x = 0; x < VIDEO_HORIZONTAL_PIXELS; ++x) {
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uint32_t pixel = pixels[stride * y + x];
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encoder->videoFrame->data[0][y * encoder->videoFrame->linesize[0] + x * 3] = pixel;
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encoder->videoFrame->data[0][y * encoder->videoFrame->linesize[0] + x * 3 + 1] = pixel >> 8;
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encoder->videoFrame->data[0][y * encoder->videoFrame->linesize[0] + x * 3 + 2] = pixel >> 16;
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}
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}
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int gotData;
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avcodec_encode_video2(encoder->video, &packet, encoder->videoFrame, &gotData);
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if (gotData) {
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if (encoder->videoStream->codec->coded_frame->key_frame) {
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packet.flags |= AV_PKT_FLAG_KEY;
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}
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packet.stream_index = encoder->videoStream->index;
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av_interleaved_write_frame(encoder->context, &packet);
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}
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av_free_packet(&packet);
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}
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@ -0,0 +1,30 @@
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#ifndef FFMPEG_ENCODER
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#define FFMPEG_ENCODER
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#include "gba-thread.h"
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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struct FFmpegEncoder {
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struct GBAAVStream d;
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AVFormatContext* context;
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AVCodecContext* audio;
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uint16_t* audioBuffer;
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size_t audioBufferSize;
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AVFrame* audioFrame;
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size_t currentAudioSample;
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int64_t currentAudioFrame;
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AVStream* audioStream;
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AVCodecContext* video;
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AVFrame* videoFrame;
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int64_t currentVideoFrame;
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AVStream* videoStream;
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};
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bool FFmpegEncoderCreate(struct FFmpegEncoder*);
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void FFmpegEncoderDestroy(struct FFmpegEncoder*);
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#endif
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