libavcodec/libschroedingerenc.c - nest-android-app/ffmpeg - Git at Google

 /*
  * Dirac encoder support via Schroedinger libraries
  * Copyright (c) 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 encoder support via libschroedinger-1.0 libraries. More details about
 * the Schroedinger project can be found at http://www.diracvideo.org/.
 * The library implements Dirac Specification Version 2.2
 * (http://dirac.sourceforge.net/specification.html).
 */

 #include <schroedinger/schro.h>
 #include <schroedinger/schrodebug.h>
 #include <schroedinger/schrovideoformat.h>

 #include "libavutil/attributes.h"
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/opt.h"

 #include "avcodec.h"
 #include "internal.h"
 #include "libschroedinger.h"
 #include "bytestream.h"


 /** libschroedinger encoder private data */
 typedef struct SchroEncoderParams {
     AVClass        *class;

     /** Schroedinger video format */
     SchroVideoFormat *format;

     /** Schroedinger frame format */
     SchroFrameFormat frame_format;

     /** frame size */
     int frame_size;

     /** Schroedinger encoder handle*/
     SchroEncoder* encoder;

     /** 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 */
     FFSchroQueue enc_frame_queue;

     /** end of sequence signalled */
     int eos_signalled;

     /** end of sequence pulled */
     int eos_pulled;

     /* counter for frames submitted to encoder, used as dts */
     int64_t dts;

     /** enable noarith */
     int noarith;
 } SchroEncoderParams;

 /**
 * Works out Schro-compatible chroma format.
 */
 static int set_chroma_format(AVCodecContext *avctx)
 {
     int num_formats = sizeof(schro_pixel_format_map) /
                       sizeof(schro_pixel_format_map[0]);
     int idx;

     SchroEncoderParams *p_schro_params = avctx->priv_data;

     for (idx = 0; idx < num_formats; ++idx) {
         if (schro_pixel_format_map[idx].ff_pix_fmt == avctx->pix_fmt) {
             p_schro_params->format->chroma_format =
                             schro_pixel_format_map[idx].schro_pix_fmt;
             return 0;
         }
     }

     av_log(avctx, AV_LOG_ERROR,
            "This codec currently only supports planar YUV 4:2:0, 4:2:2"
            " and 4:4:4 formats.\n");

     return -1;
 }

 static av_cold int libschroedinger_encode_init(AVCodecContext *avctx)
 {
     SchroEncoderParams *p_schro_params = avctx->priv_data;
     SchroVideoFormatEnum preset;

     /* Initialize the libraries that libschroedinger depends on. */
     schro_init();

     /* Create an encoder object. */
     p_schro_params->encoder = schro_encoder_new();

     if (!p_schro_params->encoder) {
         av_log(avctx, AV_LOG_ERROR,
                "Unrecoverable Error: schro_encoder_new failed. ");
         return -1;
     }

     /* Initialize the format. */
     preset = ff_get_schro_video_format_preset(avctx);
     p_schro_params->format =
                     schro_encoder_get_video_format(p_schro_params->encoder);
     schro_video_format_set_std_video_format(p_schro_params->format, preset);
     p_schro_params->format->width  = avctx->width;
     p_schro_params->format->height = avctx->height;

     if (set_chroma_format(avctx) == -1)
         return -1;

     if (avctx->color_primaries == AVCOL_PRI_BT709) {
         p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
     } else if (avctx->color_primaries == AVCOL_PRI_BT470BG) {
         p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
     } else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M) {
         p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
     }

     if (avctx->colorspace == AVCOL_SPC_BT709) {
         p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
     } else if (avctx->colorspace == AVCOL_SPC_BT470BG) {
         p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
     }

     if (avctx->color_trc == AVCOL_TRC_BT709) {
         p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
     }

     if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
                                   &p_schro_params->frame_format) == -1) {
         av_log(avctx, AV_LOG_ERROR,
                "This codec currently supports only planar YUV 4:2:0, 4:2:2"
                " and 4:4:4 formats.\n");
         return -1;
     }

     p_schro_params->format->frame_rate_numerator   = avctx->time_base.den;
     p_schro_params->format->frame_rate_denominator = avctx->time_base.num;

     p_schro_params->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
                                                           avctx->width,
                                                           avctx->height, 1);

     if (!avctx->gop_size) {
         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "gop_structure",
                                          SCHRO_ENCODER_GOP_INTRA_ONLY);

 #if FF_API_CODER_TYPE
 FF_DISABLE_DEPRECATION_WARNINGS
         if (avctx->coder_type != FF_CODER_TYPE_VLC)
             p_schro_params->noarith = 0;
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "enable_noarith",
                                          p_schro_params->noarith);
     } else {
         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "au_distance", avctx->gop_size);
         avctx->has_b_frames = 1;
         p_schro_params->dts = -1;
     }

     /* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
     if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
         if (!avctx->global_quality) {
             /* lossless coding */
             schro_encoder_setting_set_double(p_schro_params->encoder,
                                              "rate_control",
                                              SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
         } else {
             int quality;
             schro_encoder_setting_set_double(p_schro_params->encoder,
                                              "rate_control",
                                              SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY);

             quality = avctx->global_quality / FF_QP2LAMBDA;
             if (quality > 10)
                 quality = 10;
             schro_encoder_setting_set_double(p_schro_params->encoder,
                                              "quality", quality);
         }
     } else {
         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "rate_control",
                                          SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE);

         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "bitrate", avctx->bit_rate);
     }

     if (avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)
         /* All material can be coded as interlaced or progressive
            irrespective of the type of source material. */
         schro_encoder_setting_set_double(p_schro_params->encoder,
                                          "interlaced_coding", 1);

     schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
                                      !(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));

     /* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
      * and libdirac support other bit-depth data. */
     schro_video_format_set_std_signal_range(p_schro_params->format,
                                             SCHRO_SIGNAL_RANGE_8BIT_VIDEO);

     /* Set the encoder format. */
     schro_encoder_set_video_format(p_schro_params->encoder,
                                    p_schro_params->format);

     /* Set the debug level. */
     schro_debug_set_level(avctx->debug);

     schro_encoder_start(p_schro_params->encoder);

     /* Initialize the encoded frame queue. */
     ff_schro_queue_init(&p_schro_params->enc_frame_queue);
     return 0;
 }

 static SchroFrame *libschroedinger_frame_from_data(AVCodecContext *avctx,
                                                    const AVFrame *frame)
 {
     SchroEncoderParams *p_schro_params = avctx->priv_data;
     SchroFrame *in_frame = ff_create_schro_frame(avctx,
                                                  p_schro_params->frame_format);

     if (in_frame) {
         /* Copy input data to SchroFrame buffers (they match the ones
          * referenced by the AVFrame stored in priv) */
         if (av_frame_copy(in_frame->priv, frame) < 0) {
             av_log(avctx, AV_LOG_ERROR, "Failed to copy input data\n");
             return NULL;
         }
     }

     return in_frame;
 }

 static void libschroedinger_free_frame(void *data)
 {
     FFSchroEncodedFrame *enc_frame = data;

     av_freep(&enc_frame->p_encbuf);
     av_free(enc_frame);
 }

 static int libschroedinger_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                         const AVFrame *frame, int *got_packet)
 {
     int enc_size = 0;
     SchroEncoderParams *p_schro_params = avctx->priv_data;
     SchroEncoder *encoder = p_schro_params->encoder;
     struct FFSchroEncodedFrame *p_frame_output = NULL;
     int go = 1;
     SchroBuffer *enc_buf;
     int presentation_frame;
     int parse_code;
     int last_frame_in_sequence = 0;
     int pkt_size, ret;

     if (!frame) {
         /* Push end of sequence if not already signalled. */
         if (!p_schro_params->eos_signalled) {
             schro_encoder_end_of_stream(encoder);
             p_schro_params->eos_signalled = 1;
         }
     } else {
         /* Allocate frame data to schro input buffer. */
         SchroFrame *in_frame = libschroedinger_frame_from_data(avctx, frame);
         if (!in_frame)
             return AVERROR(ENOMEM);
         /* Load next frame. */
         schro_encoder_push_frame(encoder, in_frame);
     }

     if (p_schro_params->eos_pulled)
         go = 0;

     /* Now check to see if we have any output from the encoder. */
     while (go) {
         int err;
         SchroStateEnum state;
         state = schro_encoder_wait(encoder);
         switch (state) {
         case SCHRO_STATE_HAVE_BUFFER:
         case SCHRO_STATE_END_OF_STREAM:
             enc_buf = schro_encoder_pull(encoder, &presentation_frame);
             if (enc_buf->length <= 0)
                 return AVERROR_BUG;
             parse_code = enc_buf->data[4];

             /* 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
              */
             if ((err = av_reallocp(&p_schro_params->enc_buf,
                                    p_schro_params->enc_buf_size +
                                    enc_buf->length)) < 0) {
                 p_schro_params->enc_buf_size = 0;
                 return err;
             }

             memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size,
                    enc_buf->data, enc_buf->length);
             p_schro_params->enc_buf_size += enc_buf->length;


             if (state == SCHRO_STATE_END_OF_STREAM) {
                 p_schro_params->eos_pulled = 1;
                 go = 0;
             }

             if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) {
                 schro_buffer_unref(enc_buf);
                 break;
             }

             /* Create output frame. */
             p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame));
             if (!p_frame_output)
                 return AVERROR(ENOMEM);
             /* Set output data. */
             p_frame_output->size     = p_schro_params->enc_buf_size;
             p_frame_output->p_encbuf = p_schro_params->enc_buf;
             if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) &&
                 SCHRO_PARSE_CODE_IS_REFERENCE(parse_code))
                 p_frame_output->key_frame = 1;

             /* Parse the coded frame number from the bitstream. Bytes 14
              * through 17 represesent the frame number. */
             p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);

             ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
                                      p_frame_output);
             p_schro_params->enc_buf_size = 0;
             p_schro_params->enc_buf      = NULL;

             schro_buffer_unref(enc_buf);

             break;

         case SCHRO_STATE_NEED_FRAME:
             go = 0;
             break;

         case SCHRO_STATE_AGAIN:
             break;

         default:
             av_log(avctx, AV_LOG_ERROR, "Unknown Schro Encoder state\n");
             return -1;
         }
     }

     /* Copy 'next' frame in queue. */

     if (p_schro_params->enc_frame_queue.size == 1 &&
         p_schro_params->eos_pulled)
         last_frame_in_sequence = 1;

     p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue);

     if (!p_frame_output)
         return 0;

     pkt_size = p_frame_output->size;
     if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0)
         pkt_size += p_schro_params->enc_buf_size;
     if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size, 0)) < 0)
         goto error;

     memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size);
 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS
     avctx->coded_frame->key_frame = p_frame_output->key_frame;
     avctx->coded_frame->pts = p_frame_output->frame_num;
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
     /* Use the frame number of the encoded frame as the pts. It is OK to
      * do so since Dirac is a constant frame rate codec. It expects input
      * to be of constant frame rate. */
     pkt->pts = p_frame_output->frame_num;
     pkt->dts = p_schro_params->dts++;
     enc_size = p_frame_output->size;

     /* Append the end of sequence information to the last frame in the
      * sequence. */
     if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) {
         memcpy(pkt->data + enc_size, p_schro_params->enc_buf,
                p_schro_params->enc_buf_size);
         enc_size += p_schro_params->enc_buf_size;
         av_freep(&p_schro_params->enc_buf);
         p_schro_params->enc_buf_size = 0;
     }

     if (p_frame_output->key_frame)
         pkt->flags |= AV_PKT_FLAG_KEY;
     *got_packet = 1;

 error:
     /* free frame */
     libschroedinger_free_frame(p_frame_output);
     return ret;
 }


 static int libschroedinger_encode_close(AVCodecContext *avctx)
 {
     SchroEncoderParams *p_schro_params = avctx->priv_data;

     /* Close the encoder. */
     schro_encoder_free(p_schro_params->encoder);

     /* Free data in the output frame queue. */
     ff_schro_queue_free(&p_schro_params->enc_frame_queue,
                         libschroedinger_free_frame);


     /* Free the encoder buffer. */
     if (p_schro_params->enc_buf_size)
         av_freep(&p_schro_params->enc_buf);

     /* Free the video format structure. */
     av_freep(&p_schro_params->format);

     return 0;
 }

 #define OFFSET(x) offsetof(SchroEncoderParams, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
     { "noarith", "Enable noarith", OFFSET(noarith), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },

     { NULL },
 };

 static const AVClass libschroedinger_class = {
     .class_name = "libschroedinger",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 AVCodec ff_libschroedinger_encoder = {
     .name           = "libschroedinger",
     .long_name      = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_DIRAC,
     .priv_data_size = sizeof(SchroEncoderParams),
     .priv_class     = &libschroedinger_class,
     .init           = libschroedinger_encode_init,
     .encode2        = libschroedinger_encode_frame,
     .close          = libschroedinger_encode_close,
     .capabilities   = AV_CODEC_CAP_DELAY,
     .pix_fmts       = (const enum AVPixelFormat[]){
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE
     },
 };
	/*
	* Dirac encoder support via Schroedinger libraries
	* Copyright (c) 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 encoder support via libschroedinger-1.0 libraries. More details about
	* the Schroedinger project can be found at http://www.diracvideo.org/.
	* The library implements Dirac Specification Version 2.2
	* (http://dirac.sourceforge.net/specification.html).
	*/

	#include <schroedinger/schro.h>
	#include <schroedinger/schrodebug.h>
	#include <schroedinger/schrovideoformat.h>

	#include "libavutil/attributes.h"
	#include "libavutil/avassert.h"
	#include "libavutil/imgutils.h"
	#include "libavutil/opt.h"

	#include "avcodec.h"
	#include "internal.h"
	#include "libschroedinger.h"
	#include "bytestream.h"


	/** libschroedinger encoder private data */
	typedef struct SchroEncoderParams {
	AVClass *class;

	/** Schroedinger video format */
	SchroVideoFormat *format;

	/** Schroedinger frame format */
	SchroFrameFormat frame_format;

	/** frame size */
	int frame_size;

	/** Schroedinger encoder handle*/
	SchroEncoder* encoder;

	/** 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 */
	FFSchroQueue enc_frame_queue;

	/** end of sequence signalled */
	int eos_signalled;

	/** end of sequence pulled */
	int eos_pulled;

	/* counter for frames submitted to encoder, used as dts */
	int64_t dts;

	/** enable noarith */
	int noarith;
	} SchroEncoderParams;

	/**
	* Works out Schro-compatible chroma format.
	*/
	static int set_chroma_format(AVCodecContext *avctx)
	{
	int num_formats = sizeof(schro_pixel_format_map) /
	sizeof(schro_pixel_format_map[0]);
	int idx;

	SchroEncoderParams *p_schro_params = avctx->priv_data;

	for (idx = 0; idx < num_formats; ++idx) {
	if (schro_pixel_format_map[idx].ff_pix_fmt == avctx->pix_fmt) {
	p_schro_params->format->chroma_format =
	schro_pixel_format_map[idx].schro_pix_fmt;
	return 0;
	}
	}

	av_log(avctx, AV_LOG_ERROR,
	"This codec currently only supports planar YUV 4:2:0, 4:2:2"
	" and 4:4:4 formats.\n");

	return -1;
	}

	static av_cold int libschroedinger_encode_init(AVCodecContext *avctx)
	{
	SchroEncoderParams *p_schro_params = avctx->priv_data;
	SchroVideoFormatEnum preset;

	/* Initialize the libraries that libschroedinger depends on. */
	schro_init();

	/* Create an encoder object. */
	p_schro_params->encoder = schro_encoder_new();

	if (!p_schro_params->encoder) {
	av_log(avctx, AV_LOG_ERROR,
	"Unrecoverable Error: schro_encoder_new failed. ");
	return -1;
	}

	/* Initialize the format. */
	preset = ff_get_schro_video_format_preset(avctx);
	p_schro_params->format =
	schro_encoder_get_video_format(p_schro_params->encoder);
	schro_video_format_set_std_video_format(p_schro_params->format, preset);
	p_schro_params->format->width = avctx->width;
	p_schro_params->format->height = avctx->height;

	if (set_chroma_format(avctx) == -1)
	return -1;

	if (avctx->color_primaries == AVCOL_PRI_BT709) {
	p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_HDTV;
	} else if (avctx->color_primaries == AVCOL_PRI_BT470BG) {
	p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_625;
	} else if (avctx->color_primaries == AVCOL_PRI_SMPTE170M) {
	p_schro_params->format->colour_primaries = SCHRO_COLOUR_PRIMARY_SDTV_525;
	}

	if (avctx->colorspace == AVCOL_SPC_BT709) {
	p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_HDTV;
	} else if (avctx->colorspace == AVCOL_SPC_BT470BG) {
	p_schro_params->format->colour_matrix = SCHRO_COLOUR_MATRIX_SDTV;
	}

	if (avctx->color_trc == AVCOL_TRC_BT709) {
	p_schro_params->format->transfer_function = SCHRO_TRANSFER_CHAR_TV_GAMMA;
	}

	if (ff_get_schro_frame_format(p_schro_params->format->chroma_format,
	&p_schro_params->frame_format) == -1) {
	av_log(avctx, AV_LOG_ERROR,
	"This codec currently supports only planar YUV 4:2:0, 4:2:2"
	" and 4:4:4 formats.\n");
	return -1;
	}

	p_schro_params->format->frame_rate_numerator = avctx->time_base.den;
	p_schro_params->format->frame_rate_denominator = avctx->time_base.num;

	p_schro_params->frame_size = av_image_get_buffer_size(avctx->pix_fmt,
	avctx->width,
	avctx->height, 1);

	if (!avctx->gop_size) {
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"gop_structure",
	SCHRO_ENCODER_GOP_INTRA_ONLY);

	#if FF_API_CODER_TYPE
	FF_DISABLE_DEPRECATION_WARNINGS
	if (avctx->coder_type != FF_CODER_TYPE_VLC)
	p_schro_params->noarith = 0;
	FF_ENABLE_DEPRECATION_WARNINGS
	#endif
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"enable_noarith",
	p_schro_params->noarith);
	} else {
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"au_distance", avctx->gop_size);
	avctx->has_b_frames = 1;
	p_schro_params->dts = -1;
	}

	/* FIXME - Need to handle SCHRO_ENCODER_RATE_CONTROL_LOW_DELAY. */
	if (avctx->flags & AV_CODEC_FLAG_QSCALE) {
	if (!avctx->global_quality) {
	/* lossless coding */
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"rate_control",
	SCHRO_ENCODER_RATE_CONTROL_LOSSLESS);
	} else {
	int quality;
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"rate_control",
	SCHRO_ENCODER_RATE_CONTROL_CONSTANT_QUALITY);

	quality = avctx->global_quality / FF_QP2LAMBDA;
	if (quality > 10)
	quality = 10;
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"quality", quality);
	}
	} else {
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"rate_control",
	SCHRO_ENCODER_RATE_CONTROL_CONSTANT_BITRATE);

	schro_encoder_setting_set_double(p_schro_params->encoder,
	"bitrate", avctx->bit_rate);
	}

	if (avctx->flags & AV_CODEC_FLAG_INTERLACED_ME)
	/* All material can be coded as interlaced or progressive
	irrespective of the type of source material. */
	schro_encoder_setting_set_double(p_schro_params->encoder,
	"interlaced_coding", 1);

	schro_encoder_setting_set_double(p_schro_params->encoder, "open_gop",
	!(avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));

	/* FIXME: Signal range hardcoded to 8-bit data until both libschroedinger
	* and libdirac support other bit-depth data. */
	schro_video_format_set_std_signal_range(p_schro_params->format,
	SCHRO_SIGNAL_RANGE_8BIT_VIDEO);

	/* Set the encoder format. */
	schro_encoder_set_video_format(p_schro_params->encoder,
	p_schro_params->format);

	/* Set the debug level. */
	schro_debug_set_level(avctx->debug);

	schro_encoder_start(p_schro_params->encoder);

	/* Initialize the encoded frame queue. */
	ff_schro_queue_init(&p_schro_params->enc_frame_queue);
	return 0;
	}

	static SchroFrame libschroedinger_frame_from_data(AVCodecContext avctx,
	const AVFrame *frame)
	{
	SchroEncoderParams *p_schro_params = avctx->priv_data;
	SchroFrame *in_frame = ff_create_schro_frame(avctx,
	p_schro_params->frame_format);

	if (in_frame) {
	/* Copy input data to SchroFrame buffers (they match the ones
	* referenced by the AVFrame stored in priv) */
	if (av_frame_copy(in_frame->priv, frame) < 0) {
	av_log(avctx, AV_LOG_ERROR, "Failed to copy input data\n");
	return NULL;
	}
	}

	return in_frame;
	}

	static void libschroedinger_free_frame(void *data)
	{
	FFSchroEncodedFrame *enc_frame = data;

	av_freep(&enc_frame->p_encbuf);
	av_free(enc_frame);
	}

	static int libschroedinger_encode_frame(AVCodecContext avctx, AVPacket pkt,
	const AVFrame frame, int got_packet)
	{
	int enc_size = 0;
	SchroEncoderParams *p_schro_params = avctx->priv_data;
	SchroEncoder *encoder = p_schro_params->encoder;
	struct FFSchroEncodedFrame *p_frame_output = NULL;
	int go = 1;
	SchroBuffer *enc_buf;
	int presentation_frame;
	int parse_code;
	int last_frame_in_sequence = 0;
	int pkt_size, ret;

	if (!frame) {
	/* Push end of sequence if not already signalled. */
	if (!p_schro_params->eos_signalled) {
	schro_encoder_end_of_stream(encoder);
	p_schro_params->eos_signalled = 1;
	}
	} else {
	/* Allocate frame data to schro input buffer. */
	SchroFrame *in_frame = libschroedinger_frame_from_data(avctx, frame);
	if (!in_frame)
	return AVERROR(ENOMEM);
	/* Load next frame. */
	schro_encoder_push_frame(encoder, in_frame);
	}

	if (p_schro_params->eos_pulled)
	go = 0;

	/* Now check to see if we have any output from the encoder. */
	while (go) {
	int err;
	SchroStateEnum state;
	state = schro_encoder_wait(encoder);
	switch (state) {
	case SCHRO_STATE_HAVE_BUFFER:
	case SCHRO_STATE_END_OF_STREAM:
	enc_buf = schro_encoder_pull(encoder, &presentation_frame);
	if (enc_buf->length <= 0)
	return AVERROR_BUG;
	parse_code = enc_buf->data[4];

	/* 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
	*/
	if ((err = av_reallocp(&p_schro_params->enc_buf,
	p_schro_params->enc_buf_size +
	enc_buf->length)) < 0) {
	p_schro_params->enc_buf_size = 0;
	return err;
	}

	memcpy(p_schro_params->enc_buf + p_schro_params->enc_buf_size,
	enc_buf->data, enc_buf->length);
	p_schro_params->enc_buf_size += enc_buf->length;


	if (state == SCHRO_STATE_END_OF_STREAM) {
	p_schro_params->eos_pulled = 1;
	go = 0;
	}

	if (!SCHRO_PARSE_CODE_IS_PICTURE(parse_code)) {
	schro_buffer_unref(enc_buf);
	break;
	}

	/* Create output frame. */
	p_frame_output = av_mallocz(sizeof(FFSchroEncodedFrame));
	if (!p_frame_output)
	return AVERROR(ENOMEM);
	/* Set output data. */
	p_frame_output->size = p_schro_params->enc_buf_size;
	p_frame_output->p_encbuf = p_schro_params->enc_buf;
	if (SCHRO_PARSE_CODE_IS_INTRA(parse_code) &&
	SCHRO_PARSE_CODE_IS_REFERENCE(parse_code))
	p_frame_output->key_frame = 1;

	/* Parse the coded frame number from the bitstream. Bytes 14
	* through 17 represesent the frame number. */
	p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);

	ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
	p_frame_output);
	p_schro_params->enc_buf_size = 0;
	p_schro_params->enc_buf = NULL;

	schro_buffer_unref(enc_buf);

	break;

	case SCHRO_STATE_NEED_FRAME:
	go = 0;
	break;

	case SCHRO_STATE_AGAIN:
	break;

	default:
	av_log(avctx, AV_LOG_ERROR, "Unknown Schro Encoder state\n");
	return -1;
	}
	}

	/* Copy 'next' frame in queue. */

	if (p_schro_params->enc_frame_queue.size == 1 &&
	p_schro_params->eos_pulled)
	last_frame_in_sequence = 1;

	p_frame_output = ff_schro_queue_pop(&p_schro_params->enc_frame_queue);

	if (!p_frame_output)
	return 0;

	pkt_size = p_frame_output->size;
	if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0)
	pkt_size += p_schro_params->enc_buf_size;
	if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size, 0)) < 0)
	goto error;

	memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size);
	#if FF_API_CODED_FRAME
	FF_DISABLE_DEPRECATION_WARNINGS
	avctx->coded_frame->key_frame = p_frame_output->key_frame;
	avctx->coded_frame->pts = p_frame_output->frame_num;
	FF_ENABLE_DEPRECATION_WARNINGS
	#endif
	/* Use the frame number of the encoded frame as the pts. It is OK to
	* do so since Dirac is a constant frame rate codec. It expects input
	* to be of constant frame rate. */
	pkt->pts = p_frame_output->frame_num;
	pkt->dts = p_schro_params->dts++;
	enc_size = p_frame_output->size;

	/* Append the end of sequence information to the last frame in the
	* sequence. */
	if (last_frame_in_sequence && p_schro_params->enc_buf_size > 0) {
	memcpy(pkt->data + enc_size, p_schro_params->enc_buf,
	p_schro_params->enc_buf_size);
	enc_size += p_schro_params->enc_buf_size;
	av_freep(&p_schro_params->enc_buf);
	p_schro_params->enc_buf_size = 0;
	}

	if (p_frame_output->key_frame)
	pkt->flags \|= AV_PKT_FLAG_KEY;
	*got_packet = 1;

	error:
	/* free frame */
	libschroedinger_free_frame(p_frame_output);
	return ret;
	}


	static int libschroedinger_encode_close(AVCodecContext *avctx)
	{
	SchroEncoderParams *p_schro_params = avctx->priv_data;

	/* Close the encoder. */
	schro_encoder_free(p_schro_params->encoder);

	/* Free data in the output frame queue. */
	ff_schro_queue_free(&p_schro_params->enc_frame_queue,
	libschroedinger_free_frame);


	/* Free the encoder buffer. */
	if (p_schro_params->enc_buf_size)
	av_freep(&p_schro_params->enc_buf);

	/* Free the video format structure. */
	av_freep(&p_schro_params->format);

	return 0;
	}

	#define OFFSET(x) offsetof(SchroEncoderParams, x)
	#define VE AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_ENCODING_PARAM
	static const AVOption options[] = {
	{ "noarith", "Enable noarith", OFFSET(noarith), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },

	{ NULL },
	};

	static const AVClass libschroedinger_class = {
	.class_name = "libschroedinger",
	.item_name = av_default_item_name,
	.option = options,
	.version = LIBAVUTIL_VERSION_INT,
	};

	AVCodec ff_libschroedinger_encoder = {
	.name = "libschroedinger",
	.long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"),
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_DIRAC,
	.priv_data_size = sizeof(SchroEncoderParams),
	.priv_class = &libschroedinger_class,
	.init = libschroedinger_encode_init,
	.encode2 = libschroedinger_encode_frame,
	.close = libschroedinger_encode_close,
	.capabilities = AV_CODEC_CAP_DELAY,
	.pix_fmts = (const enum AVPixelFormat[]){
	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE
	},
	};