/* * Dirac encoding support via libdirac library * Copyright (c) 2005 BBC, Andrew Kennedy <dirac at rd dot bbc dot co dot uk> * Copyright (c) 2006-2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com > * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Dirac encoding support via libdirac library; more details about the * Dirac project can be found at http://dirac.sourceforge.net/. * The libdirac_encoder library implements Dirac specification version 2.2 * (http://dirac.sourceforge.net/specification.html). */ #include "libdirac_libschro.h" #include "libdirac.h" #undef NDEBUG #include <assert.h> #include <libdirac_encoder/dirac_encoder.h> /** Dirac encoder private data */ typedef struct FfmpegDiracEncoderParams { /** Dirac encoder context */ dirac_encoder_context_t enc_ctx; /** frame being encoded */ AVFrame picture; /** frame size */ int frame_size; /** Dirac encoder handle */ dirac_encoder_t* p_encoder; /** input frame buffer */ unsigned char *p_in_frame_buf; /** buffer to store encoder output before writing it to the frame queue */ unsigned char *enc_buf; /** size of encoder buffer */ int enc_buf_size; /** queue storing encoded frames */ FfmpegDiracSchroQueue enc_frame_queue; /** end of sequence signalled by user, 0 - false, 1 - true */ int eos_signalled; /** end of sequence returned by encoder, 0 - false, 1 - true */ int eos_pulled; } FfmpegDiracEncoderParams; /** * Works out Dirac-compatible chroma format. */ static dirac_chroma_t GetDiracChromaFormat(enum PixelFormat ff_pix_fmt) { int num_formats = sizeof(ffmpeg_dirac_pixel_format_map) / sizeof(ffmpeg_dirac_pixel_format_map[0]); int idx; for (idx = 0; idx < num_formats; ++idx) if (ffmpeg_dirac_pixel_format_map[idx].ff_pix_fmt == ff_pix_fmt) return ffmpeg_dirac_pixel_format_map[idx].dirac_pix_fmt; return formatNK; } /** * Dirac video preset table. Ensure that this tables matches up correctly * with the ff_dirac_schro_video_format_info table in libdirac_libschro.c. */ static const VideoFormat ff_dirac_video_formats[]={ VIDEO_FORMAT_CUSTOM , VIDEO_FORMAT_QSIF525 , VIDEO_FORMAT_QCIF , VIDEO_FORMAT_SIF525 , VIDEO_FORMAT_CIF , VIDEO_FORMAT_4SIF525 , VIDEO_FORMAT_4CIF , VIDEO_FORMAT_SD_480I60 , VIDEO_FORMAT_SD_576I50 , VIDEO_FORMAT_HD_720P60 , VIDEO_FORMAT_HD_720P50 , VIDEO_FORMAT_HD_1080I60 , VIDEO_FORMAT_HD_1080I50 , VIDEO_FORMAT_HD_1080P60 , VIDEO_FORMAT_HD_1080P50 , VIDEO_FORMAT_DIGI_CINEMA_2K24 , VIDEO_FORMAT_DIGI_CINEMA_4K24 , }; /** * Returns the video format preset matching the input video dimensions and * time base. */ static VideoFormat GetDiracVideoFormatPreset(AVCodecContext *avccontext) { unsigned int num_formats = sizeof(ff_dirac_video_formats) / sizeof(ff_dirac_video_formats[0]); unsigned int idx = ff_dirac_schro_get_video_format_idx(avccontext); return (idx < num_formats) ? ff_dirac_video_formats[idx] : VIDEO_FORMAT_CUSTOM; } static av_cold int libdirac_encode_init(AVCodecContext *avccontext) { FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data; int no_local = 1; int verbose = avccontext->debug; VideoFormat preset; /* get Dirac preset */ preset = GetDiracVideoFormatPreset(avccontext); /* initialize the encoder context */ dirac_encoder_context_init(&(p_dirac_params->enc_ctx), preset); p_dirac_params->enc_ctx.src_params.chroma = GetDiracChromaFormat(avccontext->pix_fmt); if (p_dirac_params->enc_ctx.src_params.chroma == formatNK) { av_log(avccontext, AV_LOG_ERROR, "Unsupported pixel format %d. This codec supports only " "Planar YUV formats (yuv420p, yuv422p, yuv444p\n", avccontext->pix_fmt); return -1; } p_dirac_params->enc_ctx.src_params.frame_rate.numerator = avccontext->time_base.den; p_dirac_params->enc_ctx.src_params.frame_rate.denominator = avccontext->time_base.num; p_dirac_params->enc_ctx.src_params.width = avccontext->width; p_dirac_params->enc_ctx.src_params.height = avccontext->height; p_dirac_params->frame_size = avpicture_get_size(avccontext->pix_fmt, avccontext->width, avccontext->height); avccontext->coded_frame = &p_dirac_params->picture; if (no_local) { p_dirac_params->enc_ctx.decode_flag = 0; p_dirac_params->enc_ctx.instr_flag = 0; } else { p_dirac_params->enc_ctx.decode_flag = 1; p_dirac_params->enc_ctx.instr_flag = 1; } /* Intra-only sequence */ if (!avccontext->gop_size) { p_dirac_params->enc_ctx.enc_params.num_L1 = 0; if (avccontext->coder_type == FF_CODER_TYPE_VLC) p_dirac_params->enc_ctx.enc_params.using_ac = 0; } else avccontext->has_b_frames = 1; if (avccontext->flags & CODEC_FLAG_QSCALE) { if (avccontext->global_quality) { p_dirac_params->enc_ctx.enc_params.qf = avccontext->global_quality / (FF_QP2LAMBDA * 10.0); /* if it is not default bitrate then send target rate. */ if (avccontext->bit_rate >= 1000 && avccontext->bit_rate != 200000) p_dirac_params->enc_ctx.enc_params.trate = avccontext->bit_rate / 1000; } else p_dirac_params->enc_ctx.enc_params.lossless = 1; } else if (avccontext->bit_rate >= 1000) p_dirac_params->enc_ctx.enc_params.trate = avccontext->bit_rate / 1000; if ((preset > VIDEO_FORMAT_QCIF || preset < VIDEO_FORMAT_QSIF525) && avccontext->bit_rate == 200000) p_dirac_params->enc_ctx.enc_params.trate = 0; if (avccontext->flags & CODEC_FLAG_INTERLACED_ME) /* all material can be coded as interlaced or progressive * irrespective of the type of source material */ p_dirac_params->enc_ctx.enc_params.picture_coding_mode = 1; p_dirac_params->p_encoder = dirac_encoder_init(&(p_dirac_params->enc_ctx), verbose); if (!p_dirac_params->p_encoder) { av_log(avccontext, AV_LOG_ERROR, "Unrecoverable Error: dirac_encoder_init failed. "); return EXIT_FAILURE; } /* allocate enough memory for the incoming data */ p_dirac_params->p_in_frame_buf = av_malloc(p_dirac_params->frame_size); /* initialize the encoded frame queue */ ff_dirac_schro_queue_init(&p_dirac_params->enc_frame_queue); return 0; } static void DiracFreeFrame(void *data) { FfmpegDiracSchroEncodedFrame *enc_frame = data; av_freep(&(enc_frame->p_encbuf)); av_free(enc_frame); } static int libdirac_encode_frame(AVCodecContext *avccontext, unsigned char *frame, int buf_size, void *data) { int enc_size = 0; dirac_encoder_state_t state; FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data; FfmpegDiracSchroEncodedFrame* p_frame_output = NULL; FfmpegDiracSchroEncodedFrame* p_next_output_frame = NULL; int go = 1; int last_frame_in_sequence = 0; if (!data) { /* push end of sequence if not already signalled */ if (!p_dirac_params->eos_signalled) { dirac_encoder_end_sequence(p_dirac_params->p_encoder); p_dirac_params->eos_signalled = 1; } } else { /* Allocate frame data to Dirac input buffer. * Input line size may differ from what the codec supports, * especially when transcoding from one format to another. * So use avpicture_layout to copy the frame. */ avpicture_layout((AVPicture *)data, avccontext->pix_fmt, avccontext->width, avccontext->height, p_dirac_params->p_in_frame_buf, p_dirac_params->frame_size); /* load next frame */ if (dirac_encoder_load(p_dirac_params->p_encoder, p_dirac_params->p_in_frame_buf, p_dirac_params->frame_size) < 0) { av_log(avccontext, AV_LOG_ERROR, "Unrecoverable Encoder Error." " dirac_encoder_load failed...\n"); return -1; } } if (p_dirac_params->eos_pulled) go = 0; while (go) { p_dirac_params->p_encoder->enc_buf.buffer = frame; p_dirac_params->p_encoder->enc_buf.size = buf_size; /* process frame */ state = dirac_encoder_output(p_dirac_params->p_encoder); switch (state) { case ENC_STATE_AVAIL: case ENC_STATE_EOS: assert(p_dirac_params->p_encoder->enc_buf.size > 0); /* All non-frame data is prepended to actual frame data to * be able to set the pts correctly. So we don't write data * to the frame output queue until we actually have a frame */ p_dirac_params->enc_buf = av_realloc(p_dirac_params->enc_buf, p_dirac_params->enc_buf_size + p_dirac_params->p_encoder->enc_buf.size); memcpy(p_dirac_params->enc_buf + p_dirac_params->enc_buf_size, p_dirac_params->p_encoder->enc_buf.buffer, p_dirac_params->p_encoder->enc_buf.size); p_dirac_params->enc_buf_size += p_dirac_params->p_encoder->enc_buf.size; if (state == ENC_STATE_EOS) { p_dirac_params->eos_pulled = 1; go = 0; } /* If non-frame data, don't output it until it we get an * encoded frame back from the encoder. */ if (p_dirac_params->p_encoder->enc_pparams.pnum == -1) break; /* create output frame */ p_frame_output = av_mallocz(sizeof(FfmpegDiracSchroEncodedFrame)); /* set output data */ p_frame_output->size = p_dirac_params->enc_buf_size; p_frame_output->p_encbuf = p_dirac_params->enc_buf; p_frame_output->frame_num = p_dirac_params->p_encoder->enc_pparams.pnum; if (p_dirac_params->p_encoder->enc_pparams.ptype == INTRA_PICTURE && p_dirac_params->p_encoder->enc_pparams.rtype == REFERENCE_PICTURE) p_frame_output->key_frame = 1; ff_dirac_schro_queue_push_back(&p_dirac_params->enc_frame_queue, p_frame_output); p_dirac_params->enc_buf_size = 0; p_dirac_params->enc_buf = NULL; break; case ENC_STATE_BUFFER: go = 0; break; case ENC_STATE_INVALID: av_log(avccontext, AV_LOG_ERROR, "Unrecoverable Dirac Encoder Error. Quitting...\n"); return -1; default: av_log(avccontext, AV_LOG_ERROR, "Unknown Dirac Encoder state\n"); return -1; } } /* copy 'next' frame in queue */ if (p_dirac_params->enc_frame_queue.size == 1 && p_dirac_params->eos_pulled) last_frame_in_sequence = 1; p_next_output_frame = ff_dirac_schro_queue_pop(&p_dirac_params->enc_frame_queue); if (!p_next_output_frame) return 0; memcpy(frame, p_next_output_frame->p_encbuf, p_next_output_frame->size); avccontext->coded_frame->key_frame = p_next_output_frame->key_frame; /* Use the frame number of the encoded frame as the pts. It is OK to do * so since Dirac is a constant framerate codec. It expects input to be * of constant framerate. */ avccontext->coded_frame->pts = p_next_output_frame->frame_num; enc_size = p_next_output_frame->size; /* Append the end of sequence information to the last frame in the * sequence. */ if (last_frame_in_sequence && p_dirac_params->enc_buf_size > 0) { memcpy(frame + enc_size, p_dirac_params->enc_buf, p_dirac_params->enc_buf_size); enc_size += p_dirac_params->enc_buf_size; av_freep(&p_dirac_params->enc_buf); p_dirac_params->enc_buf_size = 0; } /* free frame */ DiracFreeFrame(p_next_output_frame); return enc_size; } static av_cold int libdirac_encode_close(AVCodecContext *avccontext) { FfmpegDiracEncoderParams* p_dirac_params = avccontext->priv_data; /* close the encoder */ dirac_encoder_close(p_dirac_params->p_encoder); /* free data in the output frame queue */ ff_dirac_schro_queue_free(&p_dirac_params->enc_frame_queue, DiracFreeFrame); /* free the encoder buffer */ if (p_dirac_params->enc_buf_size) av_freep(&p_dirac_params->enc_buf); /* free the input frame buffer */ av_freep(&p_dirac_params->p_in_frame_buf); return 0; } AVCodec ff_libdirac_encoder = { "libdirac", AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC, sizeof(FfmpegDiracEncoderParams), libdirac_encode_init, libdirac_encode_frame, libdirac_encode_close, .capabilities = CODEC_CAP_DELAY, .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_NONE}, .long_name = NULL_IF_CONFIG_SMALL("libdirac Dirac 2.2"), };