diff options
Diffstat (limited to 'ffmpeg1/libavcodec/libschroedingerenc.c')
| -rw-r--r-- | ffmpeg1/libavcodec/libschroedingerenc.c | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/libschroedingerenc.c b/ffmpeg1/libavcodec/libschroedingerenc.c new file mode 100644 index 0000000..297c6c5 --- /dev/null +++ b/ffmpeg1/libavcodec/libschroedingerenc.c @@ -0,0 +1,446 @@ +/* + * 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/avassert.h" +#include "avcodec.h" +#include "internal.h" +#include "libschroedinger.h" +#include "bytestream.h" + + +/** libschroedinger encoder private data */ +typedef struct SchroEncoderParams { + /** Schroedinger video format */ + SchroVideoFormat *format; + + /** Schroedinger frame format */ + SchroFrameFormat frame_format; + + /** frame being encoded */ + AVFrame picture; + + /** 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; +} 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 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 = avpicture_get_size(avctx->pix_fmt, + avctx->width, + avctx->height); + + avctx->coded_frame = &p_schro_params->picture; + + if (!avctx->gop_size) { + schro_encoder_setting_set_double(p_schro_params->encoder, + "gop_structure", + SCHRO_ENCODER_GOP_INTRA_ONLY); + + if (avctx->coder_type == FF_CODER_TYPE_VLC) + schro_encoder_setting_set_double(p_schro_params->encoder, + "enable_noarith", 1); + } 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 & 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 & 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 & 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; + /* 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. */ + in_frame = ff_create_schro_frame(avctx, p_schro_params->frame_format); + + if (in_frame) + avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, + avctx->width, avctx->height, + in_frame->components[0].data, + p_schro_params->frame_size); + + 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); + /* 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) { + 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); + av_assert0(enc_buf->length > 0); + 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 + */ + p_schro_params->enc_buf = av_realloc(p_schro_params->enc_buf, + p_schro_params->enc_buf_size + enc_buf->length); + + 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)); + /* 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) + goto error; + + memcpy(pkt->data, p_frame_output->p_encbuf, p_frame_output->size); + avctx->coded_frame->key_frame = p_frame_output->key_frame; + /* 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 = + avctx->coded_frame->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; +} + + +AVCodec ff_libschroedinger_encoder = { + .name = "libschroedinger", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_DIRAC, + .priv_data_size = sizeof(SchroEncoderParams), + .init = libschroedinger_encode_init, + .encode2 = libschroedinger_encode_frame, + .close = libschroedinger_encode_close, + .capabilities = CODEC_CAP_DELAY, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE + }, + .long_name = NULL_IF_CONFIG_SMALL("libschroedinger Dirac 2.2"), +}; |