2 #include "h264encode.h"
4 #include <movit/util.h>
5 #include <EGL/eglplatform.h>
11 #include <libavcodec/avcodec.h>
12 #include <libavformat/avformat.h>
13 #include <libavresample/avresample.h>
14 #include <libavutil/channel_layout.h>
15 #include <libavutil/frame.h>
16 #include <libavutil/rational.h>
17 #include <libavutil/samplefmt.h>
18 #include <libavutil/opt.h>
20 #include <libdrm/drm_fourcc.h>
26 #include <va/va_drm.h>
27 #include <va/va_drmcommon.h>
28 #include <va/va_enc_h264.h>
29 #include <va/va_x11.h>
31 #include <condition_variable>
47 #include "x264encode.h"
54 #define CHECK_VASTATUS(va_status, func) \
55 if (va_status != VA_STATUS_SUCCESS) { \
56 fprintf(stderr, "%s:%d (%s) failed with %d\n", __func__, __LINE__, func, va_status); \
60 #define BUFFER_OFFSET(i) ((char *)NULL + (i))
62 //#include "loadsurface.h"
64 #define NAL_REF_IDC_NONE 0
65 #define NAL_REF_IDC_LOW 1
66 #define NAL_REF_IDC_MEDIUM 2
67 #define NAL_REF_IDC_HIGH 3
75 #define SLICE_TYPE_P 0
76 #define SLICE_TYPE_B 1
77 #define SLICE_TYPE_I 2
78 #define IS_P_SLICE(type) (SLICE_TYPE_P == (type))
79 #define IS_B_SLICE(type) (SLICE_TYPE_B == (type))
80 #define IS_I_SLICE(type) (SLICE_TYPE_I == (type))
83 #define ENTROPY_MODE_CAVLC 0
84 #define ENTROPY_MODE_CABAC 1
86 #define PROFILE_IDC_BASELINE 66
87 #define PROFILE_IDC_MAIN 77
88 #define PROFILE_IDC_HIGH 100
90 #define BITSTREAM_ALLOCATE_STEPPING 4096
91 #define SURFACE_NUM 16 /* 16 surfaces for source YUV */
92 #define MAX_NUM_REF1 16 // Seemingly a hardware-fixed value, not related to SURFACE_NUM
93 #define MAX_NUM_REF2 32 // Seemingly a hardware-fixed value, not related to SURFACE_NUM
95 static constexpr unsigned int MaxFrameNum = (2<<16);
96 static constexpr unsigned int MaxPicOrderCntLsb = (2<<8);
97 static constexpr unsigned int Log2MaxFrameNum = 16;
98 static constexpr unsigned int Log2MaxPicOrderCntLsb = 8;
99 static constexpr int rc_default_modes[] = { // Priority list of modes.
102 VA_RC_VBR_CONSTRAINED,
108 /* thread to save coded data */
109 #define SRC_SURFACE_FREE 0
110 #define SRC_SURFACE_IN_ENCODING 1
113 unsigned int *buffer;
115 int max_size_in_dword;
117 typedef struct __bitstream bitstream;
121 // H.264 video comes out in encoding order (e.g. with two B-frames:
122 // 0, 3, 1, 2, 6, 4, 5, etc.), but uncompressed video needs to
123 // come in the right order. Since we do everything, including waiting
124 // for the frames to come out of OpenGL, in encoding order, we need
125 // a reordering buffer for uncompressed frames so that they come out
126 // correctly. We go the super-lazy way of not making it understand
127 // anything about the true order (which introduces some extra latency,
128 // though); we know that for N B-frames we need at most (N-1) frames
129 // in the reorder buffer, and can just sort on that.
131 // The class also deals with keeping a freelist as needed.
132 class FrameReorderer {
134 FrameReorderer(unsigned queue_length, int width, int height);
136 // Returns the next frame to insert with its pts, if any. Otherwise -1 and nullptr.
137 // Does _not_ take ownership of data; a copy is taken if needed.
138 // The returned pointer is valid until the next call to reorder_frame, or destruction.
139 // As a special case, if queue_length == 0, will just return pts and data (no reordering needed).
140 pair<int64_t, const uint8_t *> reorder_frame(int64_t pts, const uint8_t *data);
142 // The same as reorder_frame, but without inserting anything. Used to empty the queue.
143 pair<int64_t, const uint8_t *> get_first_frame();
145 bool empty() const { return frames.empty(); }
148 unsigned queue_length;
151 priority_queue<pair<int64_t, uint8_t *>> frames;
152 stack<uint8_t *> freelist; // Includes the last value returned from reorder_frame.
154 // Owns all the pointers. Normally, freelist and frames could do this themselves,
155 // except priority_queue doesn't work well with movable-only types.
156 vector<unique_ptr<uint8_t[]>> owner;
159 FrameReorderer::FrameReorderer(unsigned queue_length, int width, int height)
160 : queue_length(queue_length), width(width), height(height)
162 for (unsigned i = 0; i < queue_length; ++i) {
163 owner.emplace_back(new uint8_t[width * height * 2]);
164 freelist.push(owner.back().get());
168 pair<int64_t, const uint8_t *> FrameReorderer::reorder_frame(int64_t pts, const uint8_t *data)
170 if (queue_length == 0) {
171 return make_pair(pts, data);
174 assert(!freelist.empty());
175 uint8_t *storage = freelist.top();
177 memcpy(storage, data, width * height * 2);
178 frames.emplace(-pts, storage); // Invert pts to get smallest first.
180 if (frames.size() >= queue_length) {
181 return get_first_frame();
183 return make_pair(-1, nullptr);
187 pair<int64_t, const uint8_t *> FrameReorderer::get_first_frame()
189 assert(!frames.empty());
190 pair<int64_t, uint8_t *> storage = frames.top();
192 int64_t pts = storage.first;
193 freelist.push(storage.second);
194 return make_pair(-pts, storage.second); // Re-invert pts (see reorder_frame()).
197 class H264EncoderImpl : public KeyFrameSignalReceiver {
199 H264EncoderImpl(QSurface *surface, const string &va_display, int width, int height, HTTPD *httpd);
201 void add_audio(int64_t pts, vector<float> audio);
202 bool begin_frame(GLuint *y_tex, GLuint *cbcr_tex);
203 RefCountedGLsync end_frame(int64_t pts, const vector<RefCountedFrame> &input_frames);
205 void open_output_file(const std::string &filename);
206 void close_output_file();
208 virtual void signal_keyframe() override {
209 stream_mux_writing_keyframes = true;
213 struct storage_task {
214 unsigned long long display_order;
219 struct PendingFrame {
220 RefCountedGLsync fence;
221 vector<RefCountedFrame> input_frames;
225 // So we never get negative dts.
226 int64_t global_delay() const {
227 return int64_t(ip_period - 1) * (TIMEBASE / MAX_FPS);
230 void encode_thread_func();
231 void encode_remaining_frames_as_p(int encoding_frame_num, int gop_start_display_frame_num, int64_t last_dts);
232 void add_packet_for_uncompressed_frame(int64_t pts, const uint8_t *data);
233 void encode_frame(PendingFrame frame, int encoding_frame_num, int display_frame_num, int gop_start_display_frame_num,
234 int frame_type, int64_t pts, int64_t dts);
235 void storage_task_thread();
236 void encode_audio(const vector<float> &audio,
237 vector<float> *audio_queue,
240 AVAudioResampleContext *resampler,
241 const vector<Mux *> &muxes);
242 void encode_audio_one_frame(const float *audio,
243 size_t num_samples, // In each channel.
246 AVAudioResampleContext *resampler,
247 const vector<Mux *> &muxes);
248 void storage_task_enqueue(storage_task task);
249 void save_codeddata(storage_task task);
250 int render_packedsequence();
251 int render_packedpicture();
252 void render_packedslice();
253 int render_sequence();
254 int render_picture(int frame_type, int display_frame_num, int gop_start_display_frame_num);
255 void sps_rbsp(bitstream *bs);
256 void pps_rbsp(bitstream *bs);
257 int build_packed_pic_buffer(unsigned char **header_buffer);
258 int render_slice(int encoding_frame_num, int display_frame_num, int gop_start_display_frame_num, int frame_type);
259 void slice_header(bitstream *bs);
260 int build_packed_seq_buffer(unsigned char **header_buffer);
261 int build_packed_slice_buffer(unsigned char **header_buffer);
262 int init_va(const string &va_display);
264 void enable_zerocopy_if_possible();
265 VADisplay va_open_display(const string &va_display);
266 void va_close_display(VADisplay va_dpy);
268 int release_encode();
269 void update_ReferenceFrames(int frame_type);
270 int update_RefPicList(int frame_type);
271 void open_output_stream();
272 void close_output_stream();
273 static int write_packet_thunk(void *opaque, uint8_t *buf, int buf_size);
274 int write_packet(uint8_t *buf, int buf_size);
276 bool is_shutdown = false;
280 thread encode_thread, storage_thread;
282 mutex storage_task_queue_mutex;
283 condition_variable storage_task_queue_changed;
284 int srcsurface_status[SURFACE_NUM]; // protected by storage_task_queue_mutex
285 queue<storage_task> storage_task_queue; // protected by storage_task_queue_mutex
286 bool storage_thread_should_quit = false; // protected by storage_task_queue_mutex
288 mutex frame_queue_mutex;
289 condition_variable frame_queue_nonempty;
290 bool encode_thread_should_quit = false; // under frame_queue_mutex
292 int current_storage_frame;
294 map<int, PendingFrame> pending_video_frames; // under frame_queue_mutex
295 map<int64_t, vector<float>> pending_audio_frames; // under frame_queue_mutex
298 AVCodecContext *context_audio_file;
299 AVCodecContext *context_audio_stream = nullptr; // nullptr = don't code separate audio for stream.
301 AVAudioResampleContext *resampler_audio_file = nullptr;
302 AVAudioResampleContext *resampler_audio_stream = nullptr;
304 vector<float> audio_queue_file;
305 vector<float> audio_queue_stream;
307 AVFrame *audio_frame = nullptr;
309 unique_ptr<FrameReorderer> reorderer;
310 unique_ptr<X264Encoder> x264_encoder; // nullptr if not using x264.
312 Display *x11_display = nullptr;
314 // Encoder parameters
316 VAProfile h264_profile = (VAProfile)~0;
317 VAConfigAttrib config_attrib[VAConfigAttribTypeMax];
318 int config_attrib_num = 0, enc_packed_header_idx;
321 VASurfaceID src_surface, ref_surface;
322 VABufferID coded_buf;
324 VAImage surface_image;
325 GLuint y_tex, cbcr_tex;
327 // Only if use_zerocopy == true.
328 EGLImage y_egl_image, cbcr_egl_image;
330 // Only if use_zerocopy == false.
332 uint8_t *y_ptr, *cbcr_ptr;
333 size_t y_offset, cbcr_offset;
335 GLSurface gl_surfaces[SURFACE_NUM];
337 VAConfigID config_id;
338 VAContextID context_id;
339 VAEncSequenceParameterBufferH264 seq_param;
340 VAEncPictureParameterBufferH264 pic_param;
341 VAEncSliceParameterBufferH264 slice_param;
342 VAPictureH264 CurrentCurrPic;
343 VAPictureH264 ReferenceFrames[MAX_NUM_REF1], RefPicList0_P[MAX_NUM_REF2], RefPicList0_B[MAX_NUM_REF2], RefPicList1_B[MAX_NUM_REF2];
345 // Static quality settings.
346 static constexpr unsigned int frame_bitrate = 15000000 / 60; // Doesn't really matter; only initial_qp does.
347 static constexpr unsigned int num_ref_frames = 2;
348 static constexpr int initial_qp = 15;
349 static constexpr int minimal_qp = 0;
350 static constexpr int intra_period = 30;
351 static constexpr int intra_idr_period = MAX_FPS; // About a second; more at lower frame rates. Not ideal.
353 // Quality settings that are meant to be static, but might be overridden
355 int constraint_set_flag = 0;
356 int h264_packedheader = 0; /* support pack header? */
357 int h264_maxref = (1<<16|1);
358 int h264_entropy_mode = 1; /* cabac */
362 unsigned int current_frame_num = 0;
363 unsigned int numShortTerm = 0;
367 int frame_width_mbaligned;
368 int frame_height_mbaligned;
370 unique_ptr<Mux> stream_mux; // To HTTP.
371 unique_ptr<Mux> file_mux; // To local disk.
373 // While Mux object is constructing, <stream_mux_writing_header> is true,
374 // and the header is being collected into stream_mux_header.
375 bool stream_mux_writing_header;
376 string stream_mux_header;
378 bool stream_mux_writing_keyframes = false;
381 // Supposedly vaRenderPicture() is supposed to destroy the buffer implicitly,
382 // but if we don't delete it here, we get leaks. The GStreamer implementation
384 static void render_picture_and_delete(VADisplay dpy, VAContextID context, VABufferID *buffers, int num_buffers)
386 VAStatus va_status = vaRenderPicture(dpy, context, buffers, num_buffers);
387 CHECK_VASTATUS(va_status, "vaRenderPicture");
389 for (int i = 0; i < num_buffers; ++i) {
390 va_status = vaDestroyBuffer(dpy, buffers[i]);
391 CHECK_VASTATUS(va_status, "vaDestroyBuffer");
396 va_swap32(unsigned int val)
398 unsigned char *pval = (unsigned char *)&val;
400 return ((pval[0] << 24) |
407 bitstream_start(bitstream *bs)
409 bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;
410 bs->buffer = (unsigned int *)calloc(bs->max_size_in_dword * sizeof(int), 1);
415 bitstream_end(bitstream *bs)
417 int pos = (bs->bit_offset >> 5);
418 int bit_offset = (bs->bit_offset & 0x1f);
419 int bit_left = 32 - bit_offset;
422 bs->buffer[pos] = va_swap32((bs->buffer[pos] << bit_left));
427 bitstream_put_ui(bitstream *bs, unsigned int val, int size_in_bits)
429 int pos = (bs->bit_offset >> 5);
430 int bit_offset = (bs->bit_offset & 0x1f);
431 int bit_left = 32 - bit_offset;
436 bs->bit_offset += size_in_bits;
438 if (bit_left > size_in_bits) {
439 bs->buffer[pos] = (bs->buffer[pos] << size_in_bits | val);
441 size_in_bits -= bit_left;
442 if (bit_left >= 32) {
443 bs->buffer[pos] = (val >> size_in_bits);
445 bs->buffer[pos] = (bs->buffer[pos] << bit_left) | (val >> size_in_bits);
447 bs->buffer[pos] = va_swap32(bs->buffer[pos]);
449 if (pos + 1 == bs->max_size_in_dword) {
450 bs->max_size_in_dword += BITSTREAM_ALLOCATE_STEPPING;
451 bs->buffer = (unsigned int *)realloc(bs->buffer, bs->max_size_in_dword * sizeof(unsigned int));
454 bs->buffer[pos + 1] = val;
459 bitstream_put_ue(bitstream *bs, unsigned int val)
461 int size_in_bits = 0;
469 bitstream_put_ui(bs, 0, size_in_bits - 1); // leading zero
470 bitstream_put_ui(bs, val, size_in_bits);
474 bitstream_put_se(bitstream *bs, int val)
476 unsigned int new_val;
481 new_val = 2 * val - 1;
483 bitstream_put_ue(bs, new_val);
487 bitstream_byte_aligning(bitstream *bs, int bit)
489 int bit_offset = (bs->bit_offset & 0x7);
490 int bit_left = 8 - bit_offset;
496 assert(bit == 0 || bit == 1);
499 new_val = (1 << bit_left) - 1;
503 bitstream_put_ui(bs, new_val, bit_left);
507 rbsp_trailing_bits(bitstream *bs)
509 bitstream_put_ui(bs, 1, 1);
510 bitstream_byte_aligning(bs, 0);
513 static void nal_start_code_prefix(bitstream *bs)
515 bitstream_put_ui(bs, 0x00000001, 32);
518 static void nal_header(bitstream *bs, int nal_ref_idc, int nal_unit_type)
520 bitstream_put_ui(bs, 0, 1); /* forbidden_zero_bit: 0 */
521 bitstream_put_ui(bs, nal_ref_idc, 2);
522 bitstream_put_ui(bs, nal_unit_type, 5);
525 void H264EncoderImpl::sps_rbsp(bitstream *bs)
527 int profile_idc = PROFILE_IDC_BASELINE;
529 if (h264_profile == VAProfileH264High)
530 profile_idc = PROFILE_IDC_HIGH;
531 else if (h264_profile == VAProfileH264Main)
532 profile_idc = PROFILE_IDC_MAIN;
534 bitstream_put_ui(bs, profile_idc, 8); /* profile_idc */
535 bitstream_put_ui(bs, !!(constraint_set_flag & 1), 1); /* constraint_set0_flag */
536 bitstream_put_ui(bs, !!(constraint_set_flag & 2), 1); /* constraint_set1_flag */
537 bitstream_put_ui(bs, !!(constraint_set_flag & 4), 1); /* constraint_set2_flag */
538 bitstream_put_ui(bs, !!(constraint_set_flag & 8), 1); /* constraint_set3_flag */
539 bitstream_put_ui(bs, 0, 4); /* reserved_zero_4bits */
540 bitstream_put_ui(bs, seq_param.level_idc, 8); /* level_idc */
541 bitstream_put_ue(bs, seq_param.seq_parameter_set_id); /* seq_parameter_set_id */
543 if ( profile_idc == PROFILE_IDC_HIGH) {
544 bitstream_put_ue(bs, 1); /* chroma_format_idc = 1, 4:2:0 */
545 bitstream_put_ue(bs, 0); /* bit_depth_luma_minus8 */
546 bitstream_put_ue(bs, 0); /* bit_depth_chroma_minus8 */
547 bitstream_put_ui(bs, 0, 1); /* qpprime_y_zero_transform_bypass_flag */
548 bitstream_put_ui(bs, 0, 1); /* seq_scaling_matrix_present_flag */
551 bitstream_put_ue(bs, seq_param.seq_fields.bits.log2_max_frame_num_minus4); /* log2_max_frame_num_minus4 */
552 bitstream_put_ue(bs, seq_param.seq_fields.bits.pic_order_cnt_type); /* pic_order_cnt_type */
554 if (seq_param.seq_fields.bits.pic_order_cnt_type == 0)
555 bitstream_put_ue(bs, seq_param.seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4); /* log2_max_pic_order_cnt_lsb_minus4 */
560 bitstream_put_ue(bs, seq_param.max_num_ref_frames); /* num_ref_frames */
561 bitstream_put_ui(bs, 0, 1); /* gaps_in_frame_num_value_allowed_flag */
563 bitstream_put_ue(bs, seq_param.picture_width_in_mbs - 1); /* pic_width_in_mbs_minus1 */
564 bitstream_put_ue(bs, seq_param.picture_height_in_mbs - 1); /* pic_height_in_map_units_minus1 */
565 bitstream_put_ui(bs, seq_param.seq_fields.bits.frame_mbs_only_flag, 1); /* frame_mbs_only_flag */
567 if (!seq_param.seq_fields.bits.frame_mbs_only_flag) {
571 bitstream_put_ui(bs, seq_param.seq_fields.bits.direct_8x8_inference_flag, 1); /* direct_8x8_inference_flag */
572 bitstream_put_ui(bs, seq_param.frame_cropping_flag, 1); /* frame_cropping_flag */
574 if (seq_param.frame_cropping_flag) {
575 bitstream_put_ue(bs, seq_param.frame_crop_left_offset); /* frame_crop_left_offset */
576 bitstream_put_ue(bs, seq_param.frame_crop_right_offset); /* frame_crop_right_offset */
577 bitstream_put_ue(bs, seq_param.frame_crop_top_offset); /* frame_crop_top_offset */
578 bitstream_put_ue(bs, seq_param.frame_crop_bottom_offset); /* frame_crop_bottom_offset */
581 //if ( frame_bit_rate < 0 ) { //TODO EW: the vui header isn't correct
583 bitstream_put_ui(bs, 0, 1); /* vui_parameters_present_flag */
585 bitstream_put_ui(bs, 1, 1); /* vui_parameters_present_flag */
586 bitstream_put_ui(bs, 0, 1); /* aspect_ratio_info_present_flag */
587 bitstream_put_ui(bs, 0, 1); /* overscan_info_present_flag */
588 bitstream_put_ui(bs, 1, 1); /* video_signal_type_present_flag */
590 bitstream_put_ui(bs, 5, 3); /* video_format (5 = Unspecified) */
591 bitstream_put_ui(bs, 0, 1); /* video_full_range_flag */
592 bitstream_put_ui(bs, 1, 1); /* colour_description_present_flag */
594 bitstream_put_ui(bs, 1, 8); /* colour_primaries (1 = BT.709) */
595 bitstream_put_ui(bs, 2, 8); /* transfer_characteristics (2 = unspecified, since we use sRGB) */
596 bitstream_put_ui(bs, 6, 8); /* matrix_coefficients (6 = BT.601/SMPTE 170M) */
599 bitstream_put_ui(bs, 0, 1); /* chroma_loc_info_present_flag */
600 bitstream_put_ui(bs, 1, 1); /* timing_info_present_flag */
602 bitstream_put_ui(bs, 1, 32); // FPS
603 bitstream_put_ui(bs, TIMEBASE * 2, 32); // FPS
604 bitstream_put_ui(bs, 1, 1);
606 bitstream_put_ui(bs, 1, 1); /* nal_hrd_parameters_present_flag */
609 bitstream_put_ue(bs, 0); /* cpb_cnt_minus1 */
610 bitstream_put_ui(bs, 4, 4); /* bit_rate_scale */
611 bitstream_put_ui(bs, 6, 4); /* cpb_size_scale */
613 bitstream_put_ue(bs, frame_bitrate - 1); /* bit_rate_value_minus1[0] */
614 bitstream_put_ue(bs, frame_bitrate*8 - 1); /* cpb_size_value_minus1[0] */
615 bitstream_put_ui(bs, 1, 1); /* cbr_flag[0] */
617 bitstream_put_ui(bs, 23, 5); /* initial_cpb_removal_delay_length_minus1 */
618 bitstream_put_ui(bs, 23, 5); /* cpb_removal_delay_length_minus1 */
619 bitstream_put_ui(bs, 23, 5); /* dpb_output_delay_length_minus1 */
620 bitstream_put_ui(bs, 23, 5); /* time_offset_length */
622 bitstream_put_ui(bs, 0, 1); /* vcl_hrd_parameters_present_flag */
623 bitstream_put_ui(bs, 0, 1); /* low_delay_hrd_flag */
625 bitstream_put_ui(bs, 0, 1); /* pic_struct_present_flag */
626 bitstream_put_ui(bs, 0, 1); /* bitstream_restriction_flag */
629 rbsp_trailing_bits(bs); /* rbsp_trailing_bits */
633 void H264EncoderImpl::pps_rbsp(bitstream *bs)
635 bitstream_put_ue(bs, pic_param.pic_parameter_set_id); /* pic_parameter_set_id */
636 bitstream_put_ue(bs, pic_param.seq_parameter_set_id); /* seq_parameter_set_id */
638 bitstream_put_ui(bs, pic_param.pic_fields.bits.entropy_coding_mode_flag, 1); /* entropy_coding_mode_flag */
640 bitstream_put_ui(bs, 0, 1); /* pic_order_present_flag: 0 */
642 bitstream_put_ue(bs, 0); /* num_slice_groups_minus1 */
644 bitstream_put_ue(bs, pic_param.num_ref_idx_l0_active_minus1); /* num_ref_idx_l0_active_minus1 */
645 bitstream_put_ue(bs, pic_param.num_ref_idx_l1_active_minus1); /* num_ref_idx_l1_active_minus1 1 */
647 bitstream_put_ui(bs, pic_param.pic_fields.bits.weighted_pred_flag, 1); /* weighted_pred_flag: 0 */
648 bitstream_put_ui(bs, pic_param.pic_fields.bits.weighted_bipred_idc, 2); /* weighted_bipred_idc: 0 */
650 bitstream_put_se(bs, pic_param.pic_init_qp - 26); /* pic_init_qp_minus26 */
651 bitstream_put_se(bs, 0); /* pic_init_qs_minus26 */
652 bitstream_put_se(bs, 0); /* chroma_qp_index_offset */
654 bitstream_put_ui(bs, pic_param.pic_fields.bits.deblocking_filter_control_present_flag, 1); /* deblocking_filter_control_present_flag */
655 bitstream_put_ui(bs, 0, 1); /* constrained_intra_pred_flag */
656 bitstream_put_ui(bs, 0, 1); /* redundant_pic_cnt_present_flag */
659 bitstream_put_ui(bs, pic_param.pic_fields.bits.transform_8x8_mode_flag, 1); /*transform_8x8_mode_flag */
660 bitstream_put_ui(bs, 0, 1); /* pic_scaling_matrix_present_flag */
661 bitstream_put_se(bs, pic_param.second_chroma_qp_index_offset ); /*second_chroma_qp_index_offset */
663 rbsp_trailing_bits(bs);
666 void H264EncoderImpl::slice_header(bitstream *bs)
668 int first_mb_in_slice = slice_param.macroblock_address;
670 bitstream_put_ue(bs, first_mb_in_slice); /* first_mb_in_slice: 0 */
671 bitstream_put_ue(bs, slice_param.slice_type); /* slice_type */
672 bitstream_put_ue(bs, slice_param.pic_parameter_set_id); /* pic_parameter_set_id: 0 */
673 bitstream_put_ui(bs, pic_param.frame_num, seq_param.seq_fields.bits.log2_max_frame_num_minus4 + 4); /* frame_num */
675 /* frame_mbs_only_flag == 1 */
676 if (!seq_param.seq_fields.bits.frame_mbs_only_flag) {
681 if (pic_param.pic_fields.bits.idr_pic_flag)
682 bitstream_put_ue(bs, slice_param.idr_pic_id); /* idr_pic_id: 0 */
684 if (seq_param.seq_fields.bits.pic_order_cnt_type == 0) {
685 bitstream_put_ui(bs, pic_param.CurrPic.TopFieldOrderCnt, seq_param.seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 + 4);
686 /* pic_order_present_flag == 0 */
692 /* redundant_pic_cnt_present_flag == 0 */
694 if (IS_P_SLICE(slice_param.slice_type)) {
695 bitstream_put_ui(bs, slice_param.num_ref_idx_active_override_flag, 1); /* num_ref_idx_active_override_flag: */
697 if (slice_param.num_ref_idx_active_override_flag)
698 bitstream_put_ue(bs, slice_param.num_ref_idx_l0_active_minus1);
700 /* ref_pic_list_reordering */
701 bitstream_put_ui(bs, 0, 1); /* ref_pic_list_reordering_flag_l0: 0 */
702 } else if (IS_B_SLICE(slice_param.slice_type)) {
703 bitstream_put_ui(bs, slice_param.direct_spatial_mv_pred_flag, 1); /* direct_spatial_mv_pred: 1 */
705 bitstream_put_ui(bs, slice_param.num_ref_idx_active_override_flag, 1); /* num_ref_idx_active_override_flag: */
707 if (slice_param.num_ref_idx_active_override_flag) {
708 bitstream_put_ue(bs, slice_param.num_ref_idx_l0_active_minus1);
709 bitstream_put_ue(bs, slice_param.num_ref_idx_l1_active_minus1);
712 /* ref_pic_list_reordering */
713 bitstream_put_ui(bs, 0, 1); /* ref_pic_list_reordering_flag_l0: 0 */
714 bitstream_put_ui(bs, 0, 1); /* ref_pic_list_reordering_flag_l1: 0 */
717 if ((pic_param.pic_fields.bits.weighted_pred_flag &&
718 IS_P_SLICE(slice_param.slice_type)) ||
719 ((pic_param.pic_fields.bits.weighted_bipred_idc == 1) &&
720 IS_B_SLICE(slice_param.slice_type))) {
721 /* FIXME: fill weight/offset table */
725 /* dec_ref_pic_marking */
726 if (pic_param.pic_fields.bits.reference_pic_flag) { /* nal_ref_idc != 0 */
727 unsigned char no_output_of_prior_pics_flag = 0;
728 unsigned char long_term_reference_flag = 0;
729 unsigned char adaptive_ref_pic_marking_mode_flag = 0;
731 if (pic_param.pic_fields.bits.idr_pic_flag) {
732 bitstream_put_ui(bs, no_output_of_prior_pics_flag, 1); /* no_output_of_prior_pics_flag: 0 */
733 bitstream_put_ui(bs, long_term_reference_flag, 1); /* long_term_reference_flag: 0 */
735 bitstream_put_ui(bs, adaptive_ref_pic_marking_mode_flag, 1); /* adaptive_ref_pic_marking_mode_flag: 0 */
739 if (pic_param.pic_fields.bits.entropy_coding_mode_flag &&
740 !IS_I_SLICE(slice_param.slice_type))
741 bitstream_put_ue(bs, slice_param.cabac_init_idc); /* cabac_init_idc: 0 */
743 bitstream_put_se(bs, slice_param.slice_qp_delta); /* slice_qp_delta: 0 */
745 /* ignore for SP/SI */
747 if (pic_param.pic_fields.bits.deblocking_filter_control_present_flag) {
748 bitstream_put_ue(bs, slice_param.disable_deblocking_filter_idc); /* disable_deblocking_filter_idc: 0 */
750 if (slice_param.disable_deblocking_filter_idc != 1) {
751 bitstream_put_se(bs, slice_param.slice_alpha_c0_offset_div2); /* slice_alpha_c0_offset_div2: 2 */
752 bitstream_put_se(bs, slice_param.slice_beta_offset_div2); /* slice_beta_offset_div2: 2 */
756 if (pic_param.pic_fields.bits.entropy_coding_mode_flag) {
757 bitstream_byte_aligning(bs, 1);
761 int H264EncoderImpl::build_packed_pic_buffer(unsigned char **header_buffer)
765 bitstream_start(&bs);
766 nal_start_code_prefix(&bs);
767 nal_header(&bs, NAL_REF_IDC_HIGH, NAL_PPS);
771 *header_buffer = (unsigned char *)bs.buffer;
772 return bs.bit_offset;
776 H264EncoderImpl::build_packed_seq_buffer(unsigned char **header_buffer)
780 bitstream_start(&bs);
781 nal_start_code_prefix(&bs);
782 nal_header(&bs, NAL_REF_IDC_HIGH, NAL_SPS);
786 *header_buffer = (unsigned char *)bs.buffer;
787 return bs.bit_offset;
790 int H264EncoderImpl::build_packed_slice_buffer(unsigned char **header_buffer)
793 int is_idr = !!pic_param.pic_fields.bits.idr_pic_flag;
794 int is_ref = !!pic_param.pic_fields.bits.reference_pic_flag;
796 bitstream_start(&bs);
797 nal_start_code_prefix(&bs);
799 if (IS_I_SLICE(slice_param.slice_type)) {
800 nal_header(&bs, NAL_REF_IDC_HIGH, is_idr ? NAL_IDR : NAL_NON_IDR);
801 } else if (IS_P_SLICE(slice_param.slice_type)) {
802 nal_header(&bs, NAL_REF_IDC_MEDIUM, NAL_NON_IDR);
804 assert(IS_B_SLICE(slice_param.slice_type));
805 nal_header(&bs, is_ref ? NAL_REF_IDC_LOW : NAL_REF_IDC_NONE, NAL_NON_IDR);
811 *header_buffer = (unsigned char *)bs.buffer;
812 return bs.bit_offset;
817 Assume frame sequence is: Frame#0, #1, #2, ..., #M, ..., #X, ... (encoding order)
818 1) period between Frame #X and Frame #N = #X - #N
819 2) 0 means infinite for intra_period/intra_idr_period, and 0 is invalid for ip_period
820 3) intra_idr_period % intra_period (intra_period > 0) and intra_period % ip_period must be 0
821 4) intra_period and intra_idr_period take precedence over ip_period
822 5) if ip_period > 1, intra_period and intra_idr_period are not the strict periods
823 of I/IDR frames, see bellow examples
824 -------------------------------------------------------------------
825 intra_period intra_idr_period ip_period frame sequence (intra_period/intra_idr_period/ip_period)
826 0 ignored 1 IDRPPPPPPP ... (No IDR/I any more)
827 0 ignored >=2 IDR(PBB)(PBB)... (No IDR/I any more)
828 1 0 ignored IDRIIIIIII... (No IDR any more)
829 1 1 ignored IDR IDR IDR IDR...
830 1 >=2 ignored IDRII IDRII IDR... (1/3/ignore)
831 >=2 0 1 IDRPPP IPPP I... (3/0/1)
832 >=2 0 >=2 IDR(PBB)(PBB)(IBB) (6/0/3)
833 (PBB)(IBB)(PBB)(IBB)...
834 >=2 >=2 1 IDRPPPPP IPPPPP IPPPPP (6/18/1)
835 IDRPPPPP IPPPPP IPPPPP...
836 >=2 >=2 >=2 {IDR(PBB)(PBB)(IBB)(PBB)(IBB)(PBB)} (6/18/3)
837 {IDR(PBB)(PBB)(IBB)(PBB)(IBB)(PBB)}...
838 {IDR(PBB)(PBB)(IBB)(PBB)} (6/12/3)
839 {IDR(PBB)(PBB)(IBB)(PBB)}...
840 {IDR(PBB)(PBB)} (6/6/3)
844 // General pts/dts strategy:
846 // Getting pts and dts right with variable frame rate (VFR) and B-frames can be a
847 // bit tricky. We assume first of all that the frame rate never goes _above_
848 // MAX_FPS, which gives us a frame period N. The decoder can always decode
849 // in at least this speed, as long at dts <= pts (the frame is not attempted
850 // presented before it is decoded). Furthermore, we never have longer chains of
851 // B-frames than a fixed constant C. (In a B-frame chain, we say that the base
852 // I/P-frame has order O=0, the B-frame depending on it directly has order O=1,
853 // etc. The last frame in the chain, which no B-frames depend on, is the “tip”
854 // frame, with an order O <= C.)
856 // Many strategies are possible, but we establish these rules:
858 // - Tip frames have dts = pts - (C-O)*N.
859 // - Non-tip frames have dts = dts_last + N.
861 // An example, with C=2 and N=10 and the data flow showed with arrows:
864 // pts: 30 40 50 60 70 80
866 // dts: 10 30 20 60 50←40
871 // To show that this works fine also with irregular spacings, let's say that
872 // the third frame is delayed a bit (something earlier was dropped). Now the
873 // situation looks like this:
876 // pts: 30 40 80 90 100 110
878 // dts: 10 30 20 90 50←40
883 // The resetting on every tip frame makes sure dts never ends up lagging a lot
884 // behind pts, and the subtraction of (C-O)*N makes sure pts <= dts.
886 // In the output of this function, if <dts_lag> is >= 0, it means to reset the
887 // dts from the current pts minus <dts_lag>, while if it's -1, the frame is not
888 // a tip frame and should be given a dts based on the previous one.
893 void encoding2display_order(
894 int encoding_order, int intra_period,
895 int intra_idr_period, int ip_period,
896 int *displaying_order,
897 int *frame_type, int *pts_lag)
899 int encoding_order_gop = 0;
903 if (intra_period == 1) { /* all are I/IDR frames */
904 *displaying_order = encoding_order;
905 if (intra_idr_period == 0)
906 *frame_type = (encoding_order == 0)?FRAME_IDR:FRAME_I;
908 *frame_type = (encoding_order % intra_idr_period == 0)?FRAME_IDR:FRAME_I;
912 if (intra_period == 0)
913 intra_idr_period = 0;
915 if (ip_period == 1) {
916 // No B-frames, sequence is like IDR PPPPP IPPPPP.
917 encoding_order_gop = (intra_idr_period == 0) ? encoding_order : (encoding_order % intra_idr_period);
918 *displaying_order = encoding_order;
920 if (encoding_order_gop == 0) { /* the first frame */
921 *frame_type = FRAME_IDR;
922 } else if (intra_period != 0 && /* have I frames */
923 encoding_order_gop >= 2 &&
924 (encoding_order_gop % intra_period == 0)) {
925 *frame_type = FRAME_I;
927 *frame_type = FRAME_P;
932 // We have B-frames. Sequence is like IDR (PBB)(PBB)(IBB)(PBB).
933 encoding_order_gop = (intra_idr_period == 0) ? encoding_order : (encoding_order % (intra_idr_period + 1));
934 *pts_lag = -1; // Most frames are not tip frames.
936 if (encoding_order_gop == 0) { /* the first frame */
937 *frame_type = FRAME_IDR;
938 *displaying_order = encoding_order;
939 // IDR frames are a special case; I honestly can't find the logic behind
940 // why this is the right thing, but it seems to line up nicely in practice :-)
941 *pts_lag = TIMEBASE / MAX_FPS;
942 } else if (((encoding_order_gop - 1) % ip_period) != 0) { /* B frames */
943 *frame_type = FRAME_B;
944 *displaying_order = encoding_order - 1;
945 if ((encoding_order_gop % ip_period) == 0) {
946 *pts_lag = 0; // Last B-frame.
948 } else if (intra_period != 0 && /* have I frames */
949 encoding_order_gop >= 2 &&
950 ((encoding_order_gop - 1) / ip_period % (intra_period / ip_period)) == 0) {
951 *frame_type = FRAME_I;
952 *displaying_order = encoding_order + ip_period - 1;
954 *frame_type = FRAME_P;
955 *displaying_order = encoding_order + ip_period - 1;
960 static const char *rc_to_string(int rc_mode)
973 case VA_RC_VBR_CONSTRAINED:
974 return "VBR_CONSTRAINED";
980 void H264EncoderImpl::enable_zerocopy_if_possible()
982 if (global_flags.uncompressed_video_to_http) {
983 fprintf(stderr, "Disabling zerocopy H.264 encoding due to --uncompressed_video_to_http.\n");
984 use_zerocopy = false;
985 } else if (global_flags.x264_video_to_http) {
986 fprintf(stderr, "Disabling zerocopy H.264 encoding due to --x264_video_to_http.\n");
987 use_zerocopy = false;
993 VADisplay H264EncoderImpl::va_open_display(const string &va_display)
995 if (va_display.empty()) {
996 x11_display = XOpenDisplay(NULL);
998 fprintf(stderr, "error: can't connect to X server!\n");
1001 enable_zerocopy_if_possible();
1002 return vaGetDisplay(x11_display);
1003 } else if (va_display[0] != '/') {
1004 x11_display = XOpenDisplay(va_display.c_str());
1006 fprintf(stderr, "error: can't connect to X server!\n");
1009 enable_zerocopy_if_possible();
1010 return vaGetDisplay(x11_display);
1012 drm_fd = open(va_display.c_str(), O_RDWR);
1014 perror(va_display.c_str());
1017 use_zerocopy = false;
1018 return vaGetDisplayDRM(drm_fd);
1022 void H264EncoderImpl::va_close_display(VADisplay va_dpy)
1025 XCloseDisplay(x11_display);
1026 x11_display = nullptr;
1033 int H264EncoderImpl::init_va(const string &va_display)
1035 VAProfile profile_list[]={VAProfileH264High, VAProfileH264Main, VAProfileH264Baseline, VAProfileH264ConstrainedBaseline};
1036 VAEntrypoint *entrypoints;
1037 int num_entrypoints, slice_entrypoint;
1038 int support_encode = 0;
1039 int major_ver, minor_ver;
1043 va_dpy = va_open_display(va_display);
1044 va_status = vaInitialize(va_dpy, &major_ver, &minor_ver);
1045 CHECK_VASTATUS(va_status, "vaInitialize");
1047 num_entrypoints = vaMaxNumEntrypoints(va_dpy);
1048 entrypoints = (VAEntrypoint *)malloc(num_entrypoints * sizeof(*entrypoints));
1050 fprintf(stderr, "error: failed to initialize VA entrypoints array\n");
1054 /* use the highest profile */
1055 for (i = 0; i < sizeof(profile_list)/sizeof(profile_list[0]); i++) {
1056 if ((h264_profile != ~0) && h264_profile != profile_list[i])
1059 h264_profile = profile_list[i];
1060 vaQueryConfigEntrypoints(va_dpy, h264_profile, entrypoints, &num_entrypoints);
1061 for (slice_entrypoint = 0; slice_entrypoint < num_entrypoints; slice_entrypoint++) {
1062 if (entrypoints[slice_entrypoint] == VAEntrypointEncSlice) {
1067 if (support_encode == 1)
1071 if (support_encode == 0) {
1072 printf("Can't find VAEntrypointEncSlice for H264 profiles. If you are using a non-Intel GPU\n");
1073 printf("but have one in your system, try launching Nageru with --va-display /dev/dri/renderD128\n");
1074 printf("to use VA-API against DRM instead of X11.\n");
1077 switch (h264_profile) {
1078 case VAProfileH264Baseline:
1080 constraint_set_flag |= (1 << 0); /* Annex A.2.1 */
1081 h264_entropy_mode = 0;
1083 case VAProfileH264ConstrainedBaseline:
1084 constraint_set_flag |= (1 << 0 | 1 << 1); /* Annex A.2.2 */
1088 case VAProfileH264Main:
1089 constraint_set_flag |= (1 << 1); /* Annex A.2.2 */
1092 case VAProfileH264High:
1093 constraint_set_flag |= (1 << 3); /* Annex A.2.4 */
1096 h264_profile = VAProfileH264Baseline;
1098 constraint_set_flag |= (1 << 0); /* Annex A.2.1 */
1103 VAConfigAttrib attrib[VAConfigAttribTypeMax];
1105 /* find out the format for the render target, and rate control mode */
1106 for (i = 0; i < VAConfigAttribTypeMax; i++)
1107 attrib[i].type = (VAConfigAttribType)i;
1109 va_status = vaGetConfigAttributes(va_dpy, h264_profile, VAEntrypointEncSlice,
1110 &attrib[0], VAConfigAttribTypeMax);
1111 CHECK_VASTATUS(va_status, "vaGetConfigAttributes");
1112 /* check the interested configattrib */
1113 if ((attrib[VAConfigAttribRTFormat].value & VA_RT_FORMAT_YUV420) == 0) {
1114 printf("Not find desired YUV420 RT format\n");
1117 config_attrib[config_attrib_num].type = VAConfigAttribRTFormat;
1118 config_attrib[config_attrib_num].value = VA_RT_FORMAT_YUV420;
1119 config_attrib_num++;
1122 if (attrib[VAConfigAttribRateControl].value != VA_ATTRIB_NOT_SUPPORTED) {
1123 int tmp = attrib[VAConfigAttribRateControl].value;
1125 if (rc_mode == -1 || !(rc_mode & tmp)) {
1126 if (rc_mode != -1) {
1127 printf("Warning: Don't support the specified RateControl mode: %s!!!, switch to ", rc_to_string(rc_mode));
1130 for (i = 0; i < sizeof(rc_default_modes) / sizeof(rc_default_modes[0]); i++) {
1131 if (rc_default_modes[i] & tmp) {
1132 rc_mode = rc_default_modes[i];
1138 config_attrib[config_attrib_num].type = VAConfigAttribRateControl;
1139 config_attrib[config_attrib_num].value = rc_mode;
1140 config_attrib_num++;
1144 if (attrib[VAConfigAttribEncPackedHeaders].value != VA_ATTRIB_NOT_SUPPORTED) {
1145 int tmp = attrib[VAConfigAttribEncPackedHeaders].value;
1147 h264_packedheader = 1;
1148 config_attrib[config_attrib_num].type = VAConfigAttribEncPackedHeaders;
1149 config_attrib[config_attrib_num].value = VA_ENC_PACKED_HEADER_NONE;
1151 if (tmp & VA_ENC_PACKED_HEADER_SEQUENCE) {
1152 config_attrib[config_attrib_num].value |= VA_ENC_PACKED_HEADER_SEQUENCE;
1155 if (tmp & VA_ENC_PACKED_HEADER_PICTURE) {
1156 config_attrib[config_attrib_num].value |= VA_ENC_PACKED_HEADER_PICTURE;
1159 if (tmp & VA_ENC_PACKED_HEADER_SLICE) {
1160 config_attrib[config_attrib_num].value |= VA_ENC_PACKED_HEADER_SLICE;
1163 if (tmp & VA_ENC_PACKED_HEADER_MISC) {
1164 config_attrib[config_attrib_num].value |= VA_ENC_PACKED_HEADER_MISC;
1167 enc_packed_header_idx = config_attrib_num;
1168 config_attrib_num++;
1171 if (attrib[VAConfigAttribEncInterlaced].value != VA_ATTRIB_NOT_SUPPORTED) {
1172 config_attrib[config_attrib_num].type = VAConfigAttribEncInterlaced;
1173 config_attrib[config_attrib_num].value = VA_ENC_PACKED_HEADER_NONE;
1174 config_attrib_num++;
1177 if (attrib[VAConfigAttribEncMaxRefFrames].value != VA_ATTRIB_NOT_SUPPORTED) {
1178 h264_maxref = attrib[VAConfigAttribEncMaxRefFrames].value;
1185 int H264EncoderImpl::setup_encode()
1188 VASurfaceID *tmp_surfaceid;
1189 int codedbuf_size, i;
1190 static VASurfaceID src_surface[SURFACE_NUM];
1191 static VASurfaceID ref_surface[SURFACE_NUM];
1193 va_status = vaCreateConfig(va_dpy, h264_profile, VAEntrypointEncSlice,
1194 &config_attrib[0], config_attrib_num, &config_id);
1195 CHECK_VASTATUS(va_status, "vaCreateConfig");
1197 /* create source surfaces */
1198 va_status = vaCreateSurfaces(va_dpy,
1199 VA_RT_FORMAT_YUV420, frame_width_mbaligned, frame_height_mbaligned,
1200 &src_surface[0], SURFACE_NUM,
1202 CHECK_VASTATUS(va_status, "vaCreateSurfaces");
1204 /* create reference surfaces */
1205 va_status = vaCreateSurfaces(va_dpy,
1206 VA_RT_FORMAT_YUV420, frame_width_mbaligned, frame_height_mbaligned,
1207 &ref_surface[0], SURFACE_NUM,
1209 CHECK_VASTATUS(va_status, "vaCreateSurfaces");
1211 tmp_surfaceid = (VASurfaceID *)calloc(2 * SURFACE_NUM, sizeof(VASurfaceID));
1212 memcpy(tmp_surfaceid, src_surface, SURFACE_NUM * sizeof(VASurfaceID));
1213 memcpy(tmp_surfaceid + SURFACE_NUM, ref_surface, SURFACE_NUM * sizeof(VASurfaceID));
1215 /* Create a context for this encode pipe */
1216 va_status = vaCreateContext(va_dpy, config_id,
1217 frame_width_mbaligned, frame_height_mbaligned,
1219 tmp_surfaceid, 2 * SURFACE_NUM,
1221 CHECK_VASTATUS(va_status, "vaCreateContext");
1222 free(tmp_surfaceid);
1224 codedbuf_size = (frame_width_mbaligned * frame_height_mbaligned * 400) / (16*16);
1226 for (i = 0; i < SURFACE_NUM; i++) {
1227 /* create coded buffer once for all
1228 * other VA buffers which won't be used again after vaRenderPicture.
1229 * so APP can always vaCreateBuffer for every frame
1230 * but coded buffer need to be mapped and accessed after vaRenderPicture/vaEndPicture
1231 * so VA won't maintain the coded buffer
1233 va_status = vaCreateBuffer(va_dpy, context_id, VAEncCodedBufferType,
1234 codedbuf_size, 1, NULL, &gl_surfaces[i].coded_buf);
1235 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1238 /* create OpenGL objects */
1239 //glGenFramebuffers(SURFACE_NUM, fbos);
1241 for (i = 0; i < SURFACE_NUM; i++) {
1242 glGenTextures(1, &gl_surfaces[i].y_tex);
1243 glGenTextures(1, &gl_surfaces[i].cbcr_tex);
1245 if (!use_zerocopy) {
1247 glBindTexture(GL_TEXTURE_2D, gl_surfaces[i].y_tex);
1248 glTexStorage2D(GL_TEXTURE_2D, 1, GL_R8, frame_width, frame_height);
1250 // Create CbCr image.
1251 glBindTexture(GL_TEXTURE_2D, gl_surfaces[i].cbcr_tex);
1252 glTexStorage2D(GL_TEXTURE_2D, 1, GL_RG8, frame_width / 2, frame_height / 2);
1254 // Generate a PBO to read into. It doesn't necessarily fit 1:1 with the VA-API
1255 // buffers, due to potentially differing pitch.
1256 glGenBuffers(1, &gl_surfaces[i].pbo);
1257 glBindBuffer(GL_PIXEL_PACK_BUFFER, gl_surfaces[i].pbo);
1258 glBufferStorage(GL_PIXEL_PACK_BUFFER, frame_width * frame_height * 2, nullptr, GL_MAP_READ_BIT | GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT);
1259 uint8_t *ptr = (uint8_t *)glMapBufferRange(GL_PIXEL_PACK_BUFFER, 0, frame_width * frame_height * 2, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
1260 gl_surfaces[i].y_offset = 0;
1261 gl_surfaces[i].cbcr_offset = frame_width * frame_height;
1262 gl_surfaces[i].y_ptr = ptr + gl_surfaces[i].y_offset;
1263 gl_surfaces[i].cbcr_ptr = ptr + gl_surfaces[i].cbcr_offset;
1264 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
1268 for (i = 0; i < SURFACE_NUM; i++) {
1269 gl_surfaces[i].src_surface = src_surface[i];
1270 gl_surfaces[i].ref_surface = ref_surface[i];
1276 // Given a list like 1 9 3 0 2 8 4 and a pivot element 3, will produce
1279 template<class T, class C>
1280 static void sort_two(T *begin, T *end, const T &pivot, const C &less_than)
1282 T *middle = partition(begin, end, [&](const T &elem) { return less_than(elem, pivot); });
1283 sort(begin, middle, [&](const T &a, const T &b) { return less_than(b, a); });
1284 sort(middle, end, less_than);
1287 void H264EncoderImpl::update_ReferenceFrames(int frame_type)
1291 if (frame_type == FRAME_B)
1294 CurrentCurrPic.flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
1296 if (numShortTerm > num_ref_frames)
1297 numShortTerm = num_ref_frames;
1298 for (i=numShortTerm-1; i>0; i--)
1299 ReferenceFrames[i] = ReferenceFrames[i-1];
1300 ReferenceFrames[0] = CurrentCurrPic;
1302 current_frame_num++;
1303 if (current_frame_num > MaxFrameNum)
1304 current_frame_num = 0;
1308 int H264EncoderImpl::update_RefPicList(int frame_type)
1310 const auto descending_by_frame_idx = [](const VAPictureH264 &a, const VAPictureH264 &b) {
1311 return a.frame_idx > b.frame_idx;
1313 const auto ascending_by_top_field_order_cnt = [](const VAPictureH264 &a, const VAPictureH264 &b) {
1314 return a.TopFieldOrderCnt < b.TopFieldOrderCnt;
1316 const auto descending_by_top_field_order_cnt = [](const VAPictureH264 &a, const VAPictureH264 &b) {
1317 return a.TopFieldOrderCnt > b.TopFieldOrderCnt;
1320 if (frame_type == FRAME_P) {
1321 memcpy(RefPicList0_P, ReferenceFrames, numShortTerm * sizeof(VAPictureH264));
1322 sort(&RefPicList0_P[0], &RefPicList0_P[numShortTerm], descending_by_frame_idx);
1323 } else if (frame_type == FRAME_B) {
1324 memcpy(RefPicList0_B, ReferenceFrames, numShortTerm * sizeof(VAPictureH264));
1325 sort_two(&RefPicList0_B[0], &RefPicList0_B[numShortTerm], CurrentCurrPic, ascending_by_top_field_order_cnt);
1327 memcpy(RefPicList1_B, ReferenceFrames, numShortTerm * sizeof(VAPictureH264));
1328 sort_two(&RefPicList1_B[0], &RefPicList1_B[numShortTerm], CurrentCurrPic, descending_by_top_field_order_cnt);
1335 int H264EncoderImpl::render_sequence()
1337 VABufferID seq_param_buf, rc_param_buf, render_id[2];
1339 VAEncMiscParameterBuffer *misc_param;
1340 VAEncMiscParameterRateControl *misc_rate_ctrl;
1342 seq_param.level_idc = 41 /*SH_LEVEL_3*/;
1343 seq_param.picture_width_in_mbs = frame_width_mbaligned / 16;
1344 seq_param.picture_height_in_mbs = frame_height_mbaligned / 16;
1345 seq_param.bits_per_second = frame_bitrate;
1347 seq_param.intra_period = intra_period;
1348 seq_param.intra_idr_period = intra_idr_period;
1349 seq_param.ip_period = ip_period;
1351 seq_param.max_num_ref_frames = num_ref_frames;
1352 seq_param.seq_fields.bits.frame_mbs_only_flag = 1;
1353 seq_param.time_scale = TIMEBASE * 2;
1354 seq_param.num_units_in_tick = 1; /* Tc = num_units_in_tick / scale */
1355 seq_param.seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = Log2MaxPicOrderCntLsb - 4;
1356 seq_param.seq_fields.bits.log2_max_frame_num_minus4 = Log2MaxFrameNum - 4;;
1357 seq_param.seq_fields.bits.frame_mbs_only_flag = 1;
1358 seq_param.seq_fields.bits.chroma_format_idc = 1;
1359 seq_param.seq_fields.bits.direct_8x8_inference_flag = 1;
1361 if (frame_width != frame_width_mbaligned ||
1362 frame_height != frame_height_mbaligned) {
1363 seq_param.frame_cropping_flag = 1;
1364 seq_param.frame_crop_left_offset = 0;
1365 seq_param.frame_crop_right_offset = (frame_width_mbaligned - frame_width)/2;
1366 seq_param.frame_crop_top_offset = 0;
1367 seq_param.frame_crop_bottom_offset = (frame_height_mbaligned - frame_height)/2;
1370 va_status = vaCreateBuffer(va_dpy, context_id,
1371 VAEncSequenceParameterBufferType,
1372 sizeof(seq_param), 1, &seq_param, &seq_param_buf);
1373 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1375 va_status = vaCreateBuffer(va_dpy, context_id,
1376 VAEncMiscParameterBufferType,
1377 sizeof(VAEncMiscParameterBuffer) + sizeof(VAEncMiscParameterRateControl),
1378 1, NULL, &rc_param_buf);
1379 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1381 vaMapBuffer(va_dpy, rc_param_buf, (void **)&misc_param);
1382 misc_param->type = VAEncMiscParameterTypeRateControl;
1383 misc_rate_ctrl = (VAEncMiscParameterRateControl *)misc_param->data;
1384 memset(misc_rate_ctrl, 0, sizeof(*misc_rate_ctrl));
1385 misc_rate_ctrl->bits_per_second = frame_bitrate;
1386 misc_rate_ctrl->target_percentage = 66;
1387 misc_rate_ctrl->window_size = 1000;
1388 misc_rate_ctrl->initial_qp = initial_qp;
1389 misc_rate_ctrl->min_qp = minimal_qp;
1390 misc_rate_ctrl->basic_unit_size = 0;
1391 vaUnmapBuffer(va_dpy, rc_param_buf);
1393 render_id[0] = seq_param_buf;
1394 render_id[1] = rc_param_buf;
1396 render_picture_and_delete(va_dpy, context_id, &render_id[0], 2);
1401 static int calc_poc(int pic_order_cnt_lsb, int frame_type)
1403 static int PicOrderCntMsb_ref = 0, pic_order_cnt_lsb_ref = 0;
1404 int prevPicOrderCntMsb, prevPicOrderCntLsb;
1405 int PicOrderCntMsb, TopFieldOrderCnt;
1407 if (frame_type == FRAME_IDR)
1408 prevPicOrderCntMsb = prevPicOrderCntLsb = 0;
1410 prevPicOrderCntMsb = PicOrderCntMsb_ref;
1411 prevPicOrderCntLsb = pic_order_cnt_lsb_ref;
1414 if ((pic_order_cnt_lsb < prevPicOrderCntLsb) &&
1415 ((prevPicOrderCntLsb - pic_order_cnt_lsb) >= (int)(MaxPicOrderCntLsb / 2)))
1416 PicOrderCntMsb = prevPicOrderCntMsb + MaxPicOrderCntLsb;
1417 else if ((pic_order_cnt_lsb > prevPicOrderCntLsb) &&
1418 ((pic_order_cnt_lsb - prevPicOrderCntLsb) > (int)(MaxPicOrderCntLsb / 2)))
1419 PicOrderCntMsb = prevPicOrderCntMsb - MaxPicOrderCntLsb;
1421 PicOrderCntMsb = prevPicOrderCntMsb;
1423 TopFieldOrderCnt = PicOrderCntMsb + pic_order_cnt_lsb;
1425 if (frame_type != FRAME_B) {
1426 PicOrderCntMsb_ref = PicOrderCntMsb;
1427 pic_order_cnt_lsb_ref = pic_order_cnt_lsb;
1430 return TopFieldOrderCnt;
1433 int H264EncoderImpl::render_picture(int frame_type, int display_frame_num, int gop_start_display_frame_num)
1435 VABufferID pic_param_buf;
1439 pic_param.CurrPic.picture_id = gl_surfaces[display_frame_num % SURFACE_NUM].ref_surface;
1440 pic_param.CurrPic.frame_idx = current_frame_num;
1441 pic_param.CurrPic.flags = 0;
1442 pic_param.CurrPic.TopFieldOrderCnt = calc_poc((display_frame_num - gop_start_display_frame_num) % MaxPicOrderCntLsb, frame_type);
1443 pic_param.CurrPic.BottomFieldOrderCnt = pic_param.CurrPic.TopFieldOrderCnt;
1444 CurrentCurrPic = pic_param.CurrPic;
1446 memcpy(pic_param.ReferenceFrames, ReferenceFrames, numShortTerm*sizeof(VAPictureH264));
1447 for (i = numShortTerm; i < MAX_NUM_REF1; i++) {
1448 pic_param.ReferenceFrames[i].picture_id = VA_INVALID_SURFACE;
1449 pic_param.ReferenceFrames[i].flags = VA_PICTURE_H264_INVALID;
1452 pic_param.pic_fields.bits.idr_pic_flag = (frame_type == FRAME_IDR);
1453 pic_param.pic_fields.bits.reference_pic_flag = (frame_type != FRAME_B);
1454 pic_param.pic_fields.bits.entropy_coding_mode_flag = h264_entropy_mode;
1455 pic_param.pic_fields.bits.deblocking_filter_control_present_flag = 1;
1456 pic_param.frame_num = current_frame_num;
1457 pic_param.coded_buf = gl_surfaces[display_frame_num % SURFACE_NUM].coded_buf;
1458 pic_param.last_picture = false; // FIXME
1459 pic_param.pic_init_qp = initial_qp;
1461 va_status = vaCreateBuffer(va_dpy, context_id, VAEncPictureParameterBufferType,
1462 sizeof(pic_param), 1, &pic_param, &pic_param_buf);
1463 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1465 render_picture_and_delete(va_dpy, context_id, &pic_param_buf, 1);
1470 int H264EncoderImpl::render_packedsequence()
1472 VAEncPackedHeaderParameterBuffer packedheader_param_buffer;
1473 VABufferID packedseq_para_bufid, packedseq_data_bufid, render_id[2];
1474 unsigned int length_in_bits;
1475 unsigned char *packedseq_buffer = NULL;
1478 length_in_bits = build_packed_seq_buffer(&packedseq_buffer);
1480 packedheader_param_buffer.type = VAEncPackedHeaderSequence;
1482 packedheader_param_buffer.bit_length = length_in_bits; /*length_in_bits*/
1483 packedheader_param_buffer.has_emulation_bytes = 0;
1484 va_status = vaCreateBuffer(va_dpy,
1486 VAEncPackedHeaderParameterBufferType,
1487 sizeof(packedheader_param_buffer), 1, &packedheader_param_buffer,
1488 &packedseq_para_bufid);
1489 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1491 va_status = vaCreateBuffer(va_dpy,
1493 VAEncPackedHeaderDataBufferType,
1494 (length_in_bits + 7) / 8, 1, packedseq_buffer,
1495 &packedseq_data_bufid);
1496 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1498 render_id[0] = packedseq_para_bufid;
1499 render_id[1] = packedseq_data_bufid;
1500 render_picture_and_delete(va_dpy, context_id, render_id, 2);
1502 free(packedseq_buffer);
1508 int H264EncoderImpl::render_packedpicture()
1510 VAEncPackedHeaderParameterBuffer packedheader_param_buffer;
1511 VABufferID packedpic_para_bufid, packedpic_data_bufid, render_id[2];
1512 unsigned int length_in_bits;
1513 unsigned char *packedpic_buffer = NULL;
1516 length_in_bits = build_packed_pic_buffer(&packedpic_buffer);
1517 packedheader_param_buffer.type = VAEncPackedHeaderPicture;
1518 packedheader_param_buffer.bit_length = length_in_bits;
1519 packedheader_param_buffer.has_emulation_bytes = 0;
1521 va_status = vaCreateBuffer(va_dpy,
1523 VAEncPackedHeaderParameterBufferType,
1524 sizeof(packedheader_param_buffer), 1, &packedheader_param_buffer,
1525 &packedpic_para_bufid);
1526 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1528 va_status = vaCreateBuffer(va_dpy,
1530 VAEncPackedHeaderDataBufferType,
1531 (length_in_bits + 7) / 8, 1, packedpic_buffer,
1532 &packedpic_data_bufid);
1533 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1535 render_id[0] = packedpic_para_bufid;
1536 render_id[1] = packedpic_data_bufid;
1537 render_picture_and_delete(va_dpy, context_id, render_id, 2);
1539 free(packedpic_buffer);
1544 void H264EncoderImpl::render_packedslice()
1546 VAEncPackedHeaderParameterBuffer packedheader_param_buffer;
1547 VABufferID packedslice_para_bufid, packedslice_data_bufid, render_id[2];
1548 unsigned int length_in_bits;
1549 unsigned char *packedslice_buffer = NULL;
1552 length_in_bits = build_packed_slice_buffer(&packedslice_buffer);
1553 packedheader_param_buffer.type = VAEncPackedHeaderSlice;
1554 packedheader_param_buffer.bit_length = length_in_bits;
1555 packedheader_param_buffer.has_emulation_bytes = 0;
1557 va_status = vaCreateBuffer(va_dpy,
1559 VAEncPackedHeaderParameterBufferType,
1560 sizeof(packedheader_param_buffer), 1, &packedheader_param_buffer,
1561 &packedslice_para_bufid);
1562 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1564 va_status = vaCreateBuffer(va_dpy,
1566 VAEncPackedHeaderDataBufferType,
1567 (length_in_bits + 7) / 8, 1, packedslice_buffer,
1568 &packedslice_data_bufid);
1569 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1571 render_id[0] = packedslice_para_bufid;
1572 render_id[1] = packedslice_data_bufid;
1573 render_picture_and_delete(va_dpy, context_id, render_id, 2);
1575 free(packedslice_buffer);
1578 int H264EncoderImpl::render_slice(int encoding_frame_num, int display_frame_num, int gop_start_display_frame_num, int frame_type)
1580 VABufferID slice_param_buf;
1584 update_RefPicList(frame_type);
1586 /* one frame, one slice */
1587 slice_param.macroblock_address = 0;
1588 slice_param.num_macroblocks = frame_width_mbaligned * frame_height_mbaligned/(16*16); /* Measured by MB */
1589 slice_param.slice_type = (frame_type == FRAME_IDR)?2:frame_type;
1590 if (frame_type == FRAME_IDR) {
1591 if (encoding_frame_num != 0)
1592 ++slice_param.idr_pic_id;
1593 } else if (frame_type == FRAME_P) {
1594 int refpiclist0_max = h264_maxref & 0xffff;
1595 memcpy(slice_param.RefPicList0, RefPicList0_P, refpiclist0_max*sizeof(VAPictureH264));
1597 for (i = refpiclist0_max; i < MAX_NUM_REF2; i++) {
1598 slice_param.RefPicList0[i].picture_id = VA_INVALID_SURFACE;
1599 slice_param.RefPicList0[i].flags = VA_PICTURE_H264_INVALID;
1601 } else if (frame_type == FRAME_B) {
1602 int refpiclist0_max = h264_maxref & 0xffff;
1603 int refpiclist1_max = (h264_maxref >> 16) & 0xffff;
1605 memcpy(slice_param.RefPicList0, RefPicList0_B, refpiclist0_max*sizeof(VAPictureH264));
1606 for (i = refpiclist0_max; i < MAX_NUM_REF2; i++) {
1607 slice_param.RefPicList0[i].picture_id = VA_INVALID_SURFACE;
1608 slice_param.RefPicList0[i].flags = VA_PICTURE_H264_INVALID;
1611 memcpy(slice_param.RefPicList1, RefPicList1_B, refpiclist1_max*sizeof(VAPictureH264));
1612 for (i = refpiclist1_max; i < MAX_NUM_REF2; i++) {
1613 slice_param.RefPicList1[i].picture_id = VA_INVALID_SURFACE;
1614 slice_param.RefPicList1[i].flags = VA_PICTURE_H264_INVALID;
1618 slice_param.slice_alpha_c0_offset_div2 = 0;
1619 slice_param.slice_beta_offset_div2 = 0;
1620 slice_param.direct_spatial_mv_pred_flag = 1;
1621 slice_param.pic_order_cnt_lsb = (display_frame_num - gop_start_display_frame_num) % MaxPicOrderCntLsb;
1624 if (h264_packedheader &&
1625 config_attrib[enc_packed_header_idx].value & VA_ENC_PACKED_HEADER_SLICE)
1626 render_packedslice();
1628 va_status = vaCreateBuffer(va_dpy, context_id, VAEncSliceParameterBufferType,
1629 sizeof(slice_param), 1, &slice_param, &slice_param_buf);
1630 CHECK_VASTATUS(va_status, "vaCreateBuffer");
1632 render_picture_and_delete(va_dpy, context_id, &slice_param_buf, 1);
1639 void H264EncoderImpl::save_codeddata(storage_task task)
1641 VACodedBufferSegment *buf_list = NULL;
1646 va_status = vaMapBuffer(va_dpy, gl_surfaces[task.display_order % SURFACE_NUM].coded_buf, (void **)(&buf_list));
1647 CHECK_VASTATUS(va_status, "vaMapBuffer");
1648 while (buf_list != NULL) {
1649 data.append(reinterpret_cast<const char *>(buf_list->buf), buf_list->size);
1650 buf_list = (VACodedBufferSegment *) buf_list->next;
1652 vaUnmapBuffer(va_dpy, gl_surfaces[task.display_order % SURFACE_NUM].coded_buf);
1657 memset(&pkt, 0, sizeof(pkt));
1659 pkt.data = reinterpret_cast<uint8_t *>(&data[0]);
1660 pkt.size = data.size();
1661 pkt.stream_index = 0;
1662 if (task.frame_type == FRAME_IDR) {
1663 pkt.flags = AV_PKT_FLAG_KEY;
1669 file_mux->add_packet(pkt, task.pts + global_delay(), task.dts + global_delay());
1671 if (!global_flags.uncompressed_video_to_http &&
1672 !global_flags.x264_video_to_http) {
1673 stream_mux->add_packet(pkt, task.pts + global_delay(), task.dts + global_delay());
1676 // Encode and add all audio frames up to and including the pts of this video frame.
1679 vector<float> audio;
1681 unique_lock<mutex> lock(frame_queue_mutex);
1682 frame_queue_nonempty.wait(lock, [this]{ return storage_thread_should_quit || !pending_audio_frames.empty(); });
1683 if (storage_thread_should_quit && pending_audio_frames.empty()) return;
1684 auto it = pending_audio_frames.begin();
1685 if (it->first > task.pts) break;
1686 audio_pts = it->first;
1687 audio = move(it->second);
1688 pending_audio_frames.erase(it);
1691 if (context_audio_stream) {
1692 encode_audio(audio, &audio_queue_file, audio_pts, context_audio_file, resampler_audio_file, { file_mux.get() });
1693 encode_audio(audio, &audio_queue_stream, audio_pts, context_audio_stream, resampler_audio_stream, { stream_mux.get() });
1695 encode_audio(audio, &audio_queue_file, audio_pts, context_audio_file, resampler_audio_file, { stream_mux.get(), file_mux.get() });
1698 if (audio_pts == task.pts) break;
1702 void H264EncoderImpl::encode_audio(
1703 const vector<float> &audio,
1704 vector<float> *audio_queue,
1706 AVCodecContext *ctx,
1707 AVAudioResampleContext *resampler,
1708 const vector<Mux *> &muxes)
1710 if (ctx->frame_size == 0) {
1711 // No queueing needed.
1712 assert(audio_queue->empty());
1713 assert(audio.size() % 2 == 0);
1714 encode_audio_one_frame(&audio[0], audio.size() / 2, audio_pts, ctx, resampler, muxes);
1718 int64_t sample_offset = audio_queue->size();
1720 audio_queue->insert(audio_queue->end(), audio.begin(), audio.end());
1722 for (sample_num = 0;
1723 sample_num + ctx->frame_size * 2 <= audio_queue->size();
1724 sample_num += ctx->frame_size * 2) {
1725 int64_t adjusted_audio_pts = audio_pts + (int64_t(sample_num) - sample_offset) * TIMEBASE / (OUTPUT_FREQUENCY * 2);
1726 encode_audio_one_frame(&(*audio_queue)[sample_num],
1733 audio_queue->erase(audio_queue->begin(), audio_queue->begin() + sample_num);
1736 void H264EncoderImpl::encode_audio_one_frame(
1740 AVCodecContext *ctx,
1741 AVAudioResampleContext *resampler,
1742 const vector<Mux *> &muxes)
1744 audio_frame->nb_samples = num_samples;
1745 audio_frame->channel_layout = AV_CH_LAYOUT_STEREO;
1746 audio_frame->format = ctx->sample_fmt;
1747 audio_frame->sample_rate = OUTPUT_FREQUENCY;
1749 if (av_samples_alloc(audio_frame->data, nullptr, 2, num_samples, ctx->sample_fmt, 0) < 0) {
1750 fprintf(stderr, "Could not allocate %ld samples.\n", num_samples);
1754 if (avresample_convert(resampler, audio_frame->data, 0, num_samples,
1755 (uint8_t **)&audio, 0, num_samples) < 0) {
1756 fprintf(stderr, "Audio conversion failed.\n");
1761 av_init_packet(&pkt);
1765 avcodec_encode_audio2(ctx, &pkt, audio_frame, &got_output);
1767 pkt.stream_index = 1;
1769 for (Mux *mux : muxes) {
1770 mux->add_packet(pkt, audio_pts + global_delay(), audio_pts + global_delay());
1774 av_freep(&audio_frame->data[0]);
1776 // TODO: Delayed frames.
1777 av_frame_unref(audio_frame);
1778 av_free_packet(&pkt);
1781 // this is weird. but it seems to put a new frame onto the queue
1782 void H264EncoderImpl::storage_task_enqueue(storage_task task)
1784 unique_lock<mutex> lock(storage_task_queue_mutex);
1785 storage_task_queue.push(move(task));
1786 storage_task_queue_changed.notify_all();
1789 void H264EncoderImpl::storage_task_thread()
1792 storage_task current;
1794 // wait until there's an encoded frame
1795 unique_lock<mutex> lock(storage_task_queue_mutex);
1796 storage_task_queue_changed.wait(lock, [this]{ return storage_thread_should_quit || !storage_task_queue.empty(); });
1797 if (storage_thread_should_quit && storage_task_queue.empty()) return;
1798 current = move(storage_task_queue.front());
1799 storage_task_queue.pop();
1804 // waits for data, then saves it to disk.
1805 va_status = vaSyncSurface(va_dpy, gl_surfaces[current.display_order % SURFACE_NUM].src_surface);
1806 CHECK_VASTATUS(va_status, "vaSyncSurface");
1807 save_codeddata(move(current));
1810 unique_lock<mutex> lock(storage_task_queue_mutex);
1811 srcsurface_status[current.display_order % SURFACE_NUM] = SRC_SURFACE_FREE;
1812 storage_task_queue_changed.notify_all();
1817 int H264EncoderImpl::release_encode()
1819 for (unsigned i = 0; i < SURFACE_NUM; i++) {
1820 vaDestroyBuffer(va_dpy, gl_surfaces[i].coded_buf);
1821 vaDestroySurfaces(va_dpy, &gl_surfaces[i].src_surface, 1);
1822 vaDestroySurfaces(va_dpy, &gl_surfaces[i].ref_surface, 1);
1824 if (!use_zerocopy) {
1825 glBindBuffer(GL_PIXEL_PACK_BUFFER, gl_surfaces[i].pbo);
1826 glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
1827 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
1828 glDeleteBuffers(1, &gl_surfaces[i].pbo);
1830 glDeleteTextures(1, &gl_surfaces[i].y_tex);
1831 glDeleteTextures(1, &gl_surfaces[i].cbcr_tex);
1834 vaDestroyContext(va_dpy, context_id);
1835 vaDestroyConfig(va_dpy, config_id);
1840 int H264EncoderImpl::deinit_va()
1842 vaTerminate(va_dpy);
1844 va_close_display(va_dpy);
1851 void init_audio_encoder(const string &codec_name, int bit_rate, AVCodecContext **ctx, AVAudioResampleContext **resampler)
1853 AVCodec *codec_audio = avcodec_find_encoder_by_name(codec_name.c_str());
1854 if (codec_audio == nullptr) {
1855 fprintf(stderr, "ERROR: Could not find codec '%s'\n", codec_name.c_str());
1859 AVCodecContext *context_audio = avcodec_alloc_context3(codec_audio);
1860 context_audio->bit_rate = bit_rate;
1861 context_audio->sample_rate = OUTPUT_FREQUENCY;
1862 context_audio->sample_fmt = codec_audio->sample_fmts[0];
1863 context_audio->channels = 2;
1864 context_audio->channel_layout = AV_CH_LAYOUT_STEREO;
1865 context_audio->time_base = AVRational{1, TIMEBASE};
1866 context_audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
1867 if (avcodec_open2(context_audio, codec_audio, NULL) < 0) {
1868 fprintf(stderr, "Could not open codec '%s'\n", codec_name.c_str());
1872 *ctx = context_audio;
1874 *resampler = avresample_alloc_context();
1875 if (*resampler == nullptr) {
1876 fprintf(stderr, "Allocating resampler failed.\n");
1880 av_opt_set_int(*resampler, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
1881 av_opt_set_int(*resampler, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
1882 av_opt_set_int(*resampler, "in_sample_rate", OUTPUT_FREQUENCY, 0);
1883 av_opt_set_int(*resampler, "out_sample_rate", OUTPUT_FREQUENCY, 0);
1884 av_opt_set_int(*resampler, "in_sample_fmt", AV_SAMPLE_FMT_FLT, 0);
1885 av_opt_set_int(*resampler, "out_sample_fmt", context_audio->sample_fmt, 0);
1887 if (avresample_open(*resampler) < 0) {
1888 fprintf(stderr, "Could not open resample context.\n");
1895 H264EncoderImpl::H264EncoderImpl(QSurface *surface, const string &va_display, int width, int height, HTTPD *httpd)
1896 : current_storage_frame(0), surface(surface), httpd(httpd), frame_width(width), frame_height(height)
1898 init_audio_encoder(AUDIO_OUTPUT_CODEC_NAME, DEFAULT_AUDIO_OUTPUT_BIT_RATE, &context_audio_file, &resampler_audio_file);
1900 if (!global_flags.stream_audio_codec_name.empty()) {
1901 init_audio_encoder(global_flags.stream_audio_codec_name,
1902 global_flags.stream_audio_codec_bitrate, &context_audio_stream, &resampler_audio_stream);
1905 frame_width_mbaligned = (frame_width + 15) & (~15);
1906 frame_height_mbaligned = (frame_height + 15) & (~15);
1908 open_output_stream();
1910 audio_frame = av_frame_alloc();
1914 if (global_flags.uncompressed_video_to_http ||
1915 global_flags.x264_video_to_http) {
1916 reorderer.reset(new FrameReorderer(ip_period - 1, frame_width, frame_height));
1918 if (global_flags.x264_video_to_http) {
1919 x264_encoder.reset(new X264Encoder(stream_mux.get()));
1922 init_va(va_display);
1925 // No frames are ready yet.
1926 memset(srcsurface_status, SRC_SURFACE_FREE, sizeof(srcsurface_status));
1928 memset(&seq_param, 0, sizeof(seq_param));
1929 memset(&pic_param, 0, sizeof(pic_param));
1930 memset(&slice_param, 0, sizeof(slice_param));
1932 storage_thread = thread(&H264EncoderImpl::storage_task_thread, this);
1934 encode_thread = thread([this]{
1935 //SDL_GL_MakeCurrent(window, context);
1936 QOpenGLContext *context = create_context(this->surface);
1937 eglBindAPI(EGL_OPENGL_API);
1938 if (!make_current(context, this->surface)) {
1939 printf("display=%p surface=%p context=%p curr=%p err=%d\n", eglGetCurrentDisplay(), this->surface, context, eglGetCurrentContext(),
1943 encode_thread_func();
1947 H264EncoderImpl::~H264EncoderImpl()
1950 av_frame_free(&audio_frame);
1951 avresample_free(&resampler_audio_file);
1952 avresample_free(&resampler_audio_stream);
1953 avcodec_free_context(&context_audio_file);
1954 avcodec_free_context(&context_audio_stream);
1955 close_output_stream();
1958 bool H264EncoderImpl::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
1960 assert(!is_shutdown);
1962 // Wait until this frame slot is done encoding.
1963 unique_lock<mutex> lock(storage_task_queue_mutex);
1964 if (srcsurface_status[current_storage_frame % SURFACE_NUM] != SRC_SURFACE_FREE) {
1965 fprintf(stderr, "Warning: Slot %d (for frame %d) is still encoding, rendering has to wait for H.264 encoder\n",
1966 current_storage_frame % SURFACE_NUM, current_storage_frame);
1968 storage_task_queue_changed.wait(lock, [this]{ return storage_thread_should_quit || (srcsurface_status[current_storage_frame % SURFACE_NUM] == SRC_SURFACE_FREE); });
1969 srcsurface_status[current_storage_frame % SURFACE_NUM] = SRC_SURFACE_IN_ENCODING;
1970 if (storage_thread_should_quit) return false;
1973 //*fbo = fbos[current_storage_frame % SURFACE_NUM];
1974 GLSurface *surf = &gl_surfaces[current_storage_frame % SURFACE_NUM];
1975 *y_tex = surf->y_tex;
1976 *cbcr_tex = surf->cbcr_tex;
1978 VAStatus va_status = vaDeriveImage(va_dpy, surf->src_surface, &surf->surface_image);
1979 CHECK_VASTATUS(va_status, "vaDeriveImage");
1982 VABufferInfo buf_info;
1983 buf_info.mem_type = VA_SURFACE_ATTRIB_MEM_TYPE_DRM_PRIME; // or VA_SURFACE_ATTRIB_MEM_TYPE_KERNEL_DRM?
1984 va_status = vaAcquireBufferHandle(va_dpy, surf->surface_image.buf, &buf_info);
1985 CHECK_VASTATUS(va_status, "vaAcquireBufferHandle");
1988 surf->y_egl_image = EGL_NO_IMAGE_KHR;
1989 EGLint y_attribs[] = {
1990 EGL_WIDTH, frame_width,
1991 EGL_HEIGHT, frame_height,
1992 EGL_LINUX_DRM_FOURCC_EXT, fourcc_code('R', '8', ' ', ' '),
1993 EGL_DMA_BUF_PLANE0_FD_EXT, EGLint(buf_info.handle),
1994 EGL_DMA_BUF_PLANE0_OFFSET_EXT, EGLint(surf->surface_image.offsets[0]),
1995 EGL_DMA_BUF_PLANE0_PITCH_EXT, EGLint(surf->surface_image.pitches[0]),
1999 surf->y_egl_image = eglCreateImageKHR(eglGetCurrentDisplay(), EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, y_attribs);
2000 assert(surf->y_egl_image != EGL_NO_IMAGE_KHR);
2002 // Associate Y image to a texture.
2003 glBindTexture(GL_TEXTURE_2D, *y_tex);
2004 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, surf->y_egl_image);
2006 // Create CbCr image.
2007 surf->cbcr_egl_image = EGL_NO_IMAGE_KHR;
2008 EGLint cbcr_attribs[] = {
2009 EGL_WIDTH, frame_width,
2010 EGL_HEIGHT, frame_height,
2011 EGL_LINUX_DRM_FOURCC_EXT, fourcc_code('G', 'R', '8', '8'),
2012 EGL_DMA_BUF_PLANE0_FD_EXT, EGLint(buf_info.handle),
2013 EGL_DMA_BUF_PLANE0_OFFSET_EXT, EGLint(surf->surface_image.offsets[1]),
2014 EGL_DMA_BUF_PLANE0_PITCH_EXT, EGLint(surf->surface_image.pitches[1]),
2018 surf->cbcr_egl_image = eglCreateImageKHR(eglGetCurrentDisplay(), EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, cbcr_attribs);
2019 assert(surf->cbcr_egl_image != EGL_NO_IMAGE_KHR);
2021 // Associate CbCr image to a texture.
2022 glBindTexture(GL_TEXTURE_2D, *cbcr_tex);
2023 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, surf->cbcr_egl_image);
2029 void H264EncoderImpl::add_audio(int64_t pts, vector<float> audio)
2031 assert(!is_shutdown);
2033 unique_lock<mutex> lock(frame_queue_mutex);
2034 pending_audio_frames[pts] = move(audio);
2036 frame_queue_nonempty.notify_all();
2039 RefCountedGLsync H264EncoderImpl::end_frame(int64_t pts, const vector<RefCountedFrame> &input_frames)
2041 assert(!is_shutdown);
2043 if (!use_zerocopy) {
2044 GLSurface *surf = &gl_surfaces[current_storage_frame % SURFACE_NUM];
2046 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
2049 glBindBuffer(GL_PIXEL_PACK_BUFFER, surf->pbo);
2052 glBindTexture(GL_TEXTURE_2D, surf->y_tex);
2054 glGetTexImage(GL_TEXTURE_2D, 0, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(surf->y_offset));
2057 glBindTexture(GL_TEXTURE_2D, surf->cbcr_tex);
2059 glGetTexImage(GL_TEXTURE_2D, 0, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(surf->cbcr_offset));
2062 glBindTexture(GL_TEXTURE_2D, 0);
2064 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
2067 glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT | GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
2071 RefCountedGLsync fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
2073 glFlush(); // Make the H.264 thread see the fence as soon as possible.
2077 unique_lock<mutex> lock(frame_queue_mutex);
2078 pending_video_frames[current_storage_frame] = PendingFrame{ fence, input_frames, pts };
2079 ++current_storage_frame;
2081 frame_queue_nonempty.notify_all();
2085 void H264EncoderImpl::shutdown()
2092 unique_lock<mutex> lock(frame_queue_mutex);
2093 encode_thread_should_quit = true;
2094 frame_queue_nonempty.notify_all();
2096 encode_thread.join();
2098 unique_lock<mutex> lock(storage_task_queue_mutex);
2099 storage_thread_should_quit = true;
2100 frame_queue_nonempty.notify_all();
2101 storage_task_queue_changed.notify_all();
2103 storage_thread.join();
2110 void H264EncoderImpl::open_output_file(const std::string &filename)
2112 AVFormatContext *avctx = avformat_alloc_context();
2113 avctx->oformat = av_guess_format(NULL, filename.c_str(), NULL);
2114 assert(filename.size() < sizeof(avctx->filename) - 1);
2115 strcpy(avctx->filename, filename.c_str());
2117 string url = "file:" + filename;
2118 int ret = avio_open2(&avctx->pb, url.c_str(), AVIO_FLAG_WRITE, &avctx->interrupt_callback, NULL);
2120 char tmp[AV_ERROR_MAX_STRING_SIZE];
2121 fprintf(stderr, "%s: avio_open2() failed: %s\n", filename.c_str(), av_make_error_string(tmp, sizeof(tmp), ret));
2125 file_mux.reset(new Mux(avctx, frame_width, frame_height, Mux::CODEC_H264, context_audio_file->codec, TIMEBASE, DEFAULT_AUDIO_OUTPUT_BIT_RATE, nullptr));
2128 void H264EncoderImpl::close_output_file()
2133 void H264EncoderImpl::open_output_stream()
2135 AVFormatContext *avctx = avformat_alloc_context();
2136 AVOutputFormat *oformat = av_guess_format(global_flags.stream_mux_name.c_str(), nullptr, nullptr);
2137 assert(oformat != nullptr);
2138 avctx->oformat = oformat;
2143 if (global_flags.stream_audio_codec_name.empty()) {
2144 codec_name = AUDIO_OUTPUT_CODEC_NAME;
2145 bit_rate = DEFAULT_AUDIO_OUTPUT_BIT_RATE;
2147 codec_name = global_flags.stream_audio_codec_name;
2148 bit_rate = global_flags.stream_audio_codec_bitrate;
2151 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
2152 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, &H264EncoderImpl::write_packet_thunk, nullptr);
2154 Mux::Codec video_codec;
2155 if (global_flags.uncompressed_video_to_http) {
2156 video_codec = Mux::CODEC_NV12;
2158 video_codec = Mux::CODEC_H264;
2161 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
2162 AVCodec *codec_audio = avcodec_find_encoder_by_name(codec_name.c_str());
2163 if (codec_audio == nullptr) {
2164 fprintf(stderr, "ERROR: Could not find codec '%s'\n", codec_name.c_str());
2168 int time_base = global_flags.stream_coarse_timebase ? COARSE_TIMEBASE : TIMEBASE;
2169 stream_mux_writing_header = true;
2170 stream_mux.reset(new Mux(avctx, frame_width, frame_height, video_codec, codec_audio, time_base, bit_rate, this));
2171 stream_mux_writing_header = false;
2172 httpd->set_header(stream_mux_header);
2173 stream_mux_header.clear();
2176 void H264EncoderImpl::close_output_stream()
2181 int H264EncoderImpl::write_packet_thunk(void *opaque, uint8_t *buf, int buf_size)
2183 H264EncoderImpl *h264_encoder = (H264EncoderImpl *)opaque;
2184 return h264_encoder->write_packet(buf, buf_size);
2187 int H264EncoderImpl::write_packet(uint8_t *buf, int buf_size)
2189 if (stream_mux_writing_header) {
2190 stream_mux_header.append((char *)buf, buf_size);
2192 httpd->add_data((char *)buf, buf_size, stream_mux_writing_keyframes);
2193 stream_mux_writing_keyframes = false;
2198 void H264EncoderImpl::encode_thread_func()
2200 int64_t last_dts = -1;
2201 int gop_start_display_frame_num = 0;
2202 for (int encoding_frame_num = 0; ; ++encoding_frame_num) {
2205 int frame_type, display_frame_num;
2206 encoding2display_order(encoding_frame_num, intra_period, intra_idr_period, ip_period,
2207 &display_frame_num, &frame_type, &pts_lag);
2208 if (frame_type == FRAME_IDR) {
2210 current_frame_num = 0;
2211 gop_start_display_frame_num = display_frame_num;
2215 unique_lock<mutex> lock(frame_queue_mutex);
2216 frame_queue_nonempty.wait(lock, [this, display_frame_num]{
2217 return encode_thread_should_quit || pending_video_frames.count(display_frame_num) != 0;
2219 if (encode_thread_should_quit && pending_video_frames.count(display_frame_num) == 0) {
2220 // We have queued frames that were supposed to be B-frames,
2221 // but will be no P-frame to encode them against. Encode them all
2222 // as P-frames instead. Note that this happens under the mutex,
2223 // but nobody else uses it at this point, since we're shutting down,
2224 // so there's no contention.
2225 encode_remaining_frames_as_p(encoding_frame_num, gop_start_display_frame_num, last_dts);
2228 frame = move(pending_video_frames[display_frame_num]);
2229 pending_video_frames.erase(display_frame_num);
2233 // Determine the dts of this frame.
2235 if (pts_lag == -1) {
2236 assert(last_dts != -1);
2237 dts = last_dts + (TIMEBASE / MAX_FPS);
2239 dts = frame.pts - pts_lag;
2243 encode_frame(frame, encoding_frame_num, display_frame_num, gop_start_display_frame_num, frame_type, frame.pts, dts);
2247 void H264EncoderImpl::encode_remaining_frames_as_p(int encoding_frame_num, int gop_start_display_frame_num, int64_t last_dts)
2249 if (pending_video_frames.empty()) {
2253 for (auto &pending_frame : pending_video_frames) {
2254 int display_frame_num = pending_frame.first;
2255 assert(display_frame_num > 0);
2256 PendingFrame frame = move(pending_frame.second);
2257 int64_t dts = last_dts + (TIMEBASE / MAX_FPS);
2258 printf("Finalizing encode: Encoding leftover frame %d as P-frame instead of B-frame.\n", display_frame_num);
2259 encode_frame(frame, encoding_frame_num++, display_frame_num, gop_start_display_frame_num, FRAME_P, frame.pts, dts);
2263 if (global_flags.uncompressed_video_to_http ||
2264 global_flags.x264_video_to_http) {
2265 // Add frames left in reorderer.
2266 while (!reorderer->empty()) {
2267 pair<int64_t, const uint8_t *> output_frame = reorderer->get_first_frame();
2268 if (global_flags.uncompressed_video_to_http) {
2269 add_packet_for_uncompressed_frame(output_frame.first, output_frame.second);
2271 assert(global_flags.x264_video_to_http);
2272 x264_encoder->add_frame(output_frame.first, output_frame.second);
2278 void H264EncoderImpl::add_packet_for_uncompressed_frame(int64_t pts, const uint8_t *data)
2281 memset(&pkt, 0, sizeof(pkt));
2283 pkt.data = const_cast<uint8_t *>(data);
2284 pkt.size = frame_width * frame_height * 2;
2285 pkt.stream_index = 0;
2286 pkt.flags = AV_PKT_FLAG_KEY;
2287 stream_mux->add_packet(pkt, pts, pts);
2292 void memcpy_with_pitch(uint8_t *dst, const uint8_t *src, size_t src_width, size_t dst_pitch, size_t height)
2294 if (src_width == dst_pitch) {
2295 memcpy(dst, src, src_width * height);
2297 for (size_t y = 0; y < height; ++y) {
2298 const uint8_t *sptr = src + y * src_width;
2299 uint8_t *dptr = dst + y * dst_pitch;
2300 memcpy(dptr, sptr, src_width);
2307 void H264EncoderImpl::encode_frame(H264EncoderImpl::PendingFrame frame, int encoding_frame_num, int display_frame_num, int gop_start_display_frame_num,
2308 int frame_type, int64_t pts, int64_t dts)
2310 // Wait for the GPU to be done with the frame.
2313 sync_status = glClientWaitSync(frame.fence.get(), 0, 1000000000);
2315 } while (sync_status == GL_TIMEOUT_EXPIRED);
2316 assert(sync_status != GL_WAIT_FAILED);
2318 // Release back any input frames we needed to render this frame.
2319 frame.input_frames.clear();
2321 GLSurface *surf = &gl_surfaces[display_frame_num % SURFACE_NUM];
2325 eglDestroyImageKHR(eglGetCurrentDisplay(), surf->y_egl_image);
2326 eglDestroyImageKHR(eglGetCurrentDisplay(), surf->cbcr_egl_image);
2327 va_status = vaReleaseBufferHandle(va_dpy, surf->surface_image.buf);
2328 CHECK_VASTATUS(va_status, "vaReleaseBufferHandle");
2330 unsigned char *surface_p = nullptr;
2331 vaMapBuffer(va_dpy, surf->surface_image.buf, (void **)&surface_p);
2333 unsigned char *va_y_ptr = (unsigned char *)surface_p + surf->surface_image.offsets[0];
2334 memcpy_with_pitch(va_y_ptr, surf->y_ptr, frame_width, surf->surface_image.pitches[0], frame_height);
2336 unsigned char *va_cbcr_ptr = (unsigned char *)surface_p + surf->surface_image.offsets[1];
2337 memcpy_with_pitch(va_cbcr_ptr, surf->cbcr_ptr, (frame_width / 2) * sizeof(uint16_t), surf->surface_image.pitches[1], frame_height / 2);
2339 va_status = vaUnmapBuffer(va_dpy, surf->surface_image.buf);
2340 CHECK_VASTATUS(va_status, "vaUnmapBuffer");
2342 if (global_flags.uncompressed_video_to_http ||
2343 global_flags.x264_video_to_http) {
2344 // Add uncompressed video. (Note that pts == dts here.)
2345 // Delay needs to match audio.
2346 pair<int64_t, const uint8_t *> output_frame = reorderer->reorder_frame(pts + global_delay(), reinterpret_cast<uint8_t *>(surf->y_ptr));
2347 if (output_frame.second != nullptr) {
2348 if (global_flags.uncompressed_video_to_http) {
2349 add_packet_for_uncompressed_frame(output_frame.first, output_frame.second);
2351 assert(global_flags.x264_video_to_http);
2352 x264_encoder->add_frame(output_frame.first, output_frame.second);
2358 va_status = vaDestroyImage(va_dpy, surf->surface_image.image_id);
2359 CHECK_VASTATUS(va_status, "vaDestroyImage");
2361 // Schedule the frame for encoding.
2362 VASurfaceID va_surface = surf->src_surface;
2363 va_status = vaBeginPicture(va_dpy, context_id, va_surface);
2364 CHECK_VASTATUS(va_status, "vaBeginPicture");
2366 if (frame_type == FRAME_IDR) {
2368 render_picture(frame_type, display_frame_num, gop_start_display_frame_num);
2369 if (h264_packedheader) {
2370 render_packedsequence();
2371 render_packedpicture();
2374 //render_sequence();
2375 render_picture(frame_type, display_frame_num, gop_start_display_frame_num);
2377 render_slice(encoding_frame_num, display_frame_num, gop_start_display_frame_num, frame_type);
2379 va_status = vaEndPicture(va_dpy, context_id);
2380 CHECK_VASTATUS(va_status, "vaEndPicture");
2382 // so now the data is done encoding (well, async job kicked off)...
2383 // we send that to the storage thread
2385 tmp.display_order = display_frame_num;
2386 tmp.frame_type = frame_type;
2389 storage_task_enqueue(move(tmp));
2391 update_ReferenceFrames(frame_type);
2395 H264Encoder::H264Encoder(QSurface *surface, const string &va_display, int width, int height, HTTPD *httpd)
2396 : impl(new H264EncoderImpl(surface, va_display, width, height, httpd)) {}
2398 // Must be defined here because unique_ptr<> destructor needs to know the impl.
2399 H264Encoder::~H264Encoder() {}
2401 void H264Encoder::add_audio(int64_t pts, vector<float> audio)
2403 impl->add_audio(pts, audio);
2406 bool H264Encoder::begin_frame(GLuint *y_tex, GLuint *cbcr_tex)
2408 return impl->begin_frame(y_tex, cbcr_tex);
2411 RefCountedGLsync H264Encoder::end_frame(int64_t pts, const vector<RefCountedFrame> &input_frames)
2413 return impl->end_frame(pts, input_frames);
2416 void H264Encoder::shutdown()
2421 void H264Encoder::open_output_file(const std::string &filename)
2423 impl->open_output_file(filename);
2426 void H264Encoder::close_output_file()
2428 impl->close_output_file();