avcodec.h
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上传日期:2020-07-06
资源大小:29949k
文件大小:11k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * avcodec.h: decoder and encoder using libavcodec
- *****************************************************************************
- * Copyright (C) 2001-2008 the VideoLAN team
- * $Id: 88ba3ebf99cb4444e5d37d995015f3825a878793 $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /* VLC <-> avcodec tables */
- int GetFfmpegCodec( vlc_fourcc_t i_fourcc, int *pi_cat,
- int *pi_ffmpeg_codec, const char **ppsz_name );
- int GetVlcFourcc( int i_ffmpeg_codec, int *pi_cat,
- vlc_fourcc_t *pi_fourcc, const char **ppsz_name );
- int TestFfmpegChroma( const int i_ffmpeg_id, const vlc_fourcc_t i_vlc_fourcc );
- int GetFfmpegChroma( int *i_ffmpeg_chroma, const video_format_t fmt );
- int GetVlcChroma( video_format_t *fmt, const int i_ffmpeg_chroma );
- picture_t * DecodeVideo ( decoder_t *, block_t ** );
- aout_buffer_t * DecodeAudio( decoder_t *, block_t ** );
- /* Video encoder module */
- int OpenEncoder ( vlc_object_t * );
- void CloseEncoder( vlc_object_t * );
- /* Audio encoder module */
- int OpenAudioEncoder ( vlc_object_t * );
- void CloseAudioEncoder( vlc_object_t * );
- /* Deinterlace video filter module */
- int OpenDeinterlace( vlc_object_t * );
- void CloseDeinterlace( vlc_object_t * );
- void InitLibavcodec( vlc_object_t *p_object );
- /* Video Decoder */
- int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
- AVCodec *p_codec, int i_codec_id, const char *psz_namecodec );
- void EndVideoDec( decoder_t *p_dec );
- /* Audio Decoder */
- int InitAudioDec( decoder_t *p_dec, AVCodecContext *p_context,
- AVCodec *p_codec, int i_codec_id, const char *psz_namecodec );
- void EndAudioDec( decoder_t *p_dec );
- /*****************************************************************************
- * Module descriptor help strings
- *****************************************************************************/
- #define DR_TEXT N_("Direct rendering")
- /* FIXME Does somebody who knows what it does, explain */
- #define DR_LONGTEXT N_("Direct rendering")
- #define ERROR_TEXT N_("Error resilience")
- #define ERROR_LONGTEXT N_(
- "Ffmpeg can do error resilience.n"
- "However, with a buggy encoder (such as the ISO MPEG-4 encoder from M$) "
- "this can produce a lot of errors.n"
- "Valid values range from 0 to 4 (0 disables all errors resilience).")
- #define BUGS_TEXT N_("Workaround bugs")
- #define BUGS_LONGTEXT N_(
- "Try to fix some bugs:n"
- "1 autodetectn"
- "2 old msmpeg4n"
- "4 xvid interlacedn"
- "8 ump4 n"
- "16 no paddingn"
- "32 ac vlcn"
- "64 Qpel chroma.n"
- "This must be the sum of the values. For example, to fix "ac vlc" and "
- ""ump4", enter 40.")
- #define HURRYUP_TEXT N_("Hurry up")
- #define HURRYUP_LONGTEXT N_(
- "The decoder can partially decode or skip frame(s) "
- "when there is not enough time. It's useful with low CPU power "
- "but it can produce distorted pictures.")
- #define FAST_TEXT N_("Allow speed tricks")
- #define FAST_LONGTEXT N_(
- "Allow non specification compliant speedup tricks. Faster but error-prone.")
- #define SKIP_FRAME_TEXT N_("Skip frame (default=0)")
- #define SKIP_FRAME_LONGTEXT N_(
- "Force skipping of frames to speed up decoding "
- "(-1=None, 0=Default, 1=B-frames, 2=P-frames, 3=B+P frames, 4=all frames)." )
- #define SKIP_IDCT_TEXT N_("Skip idct (default=0)")
- #define SKIP_IDCT_LONGTEXT N_(
- "Force skipping of idct to speed up decoding for frame types"
- "(-1=None, 0=Default, 1=B-frames, 2=P-frames, 3=B+P frames, 4=all frames)." )
- #define DEBUG_TEXT N_( "Debug mask" )
- #define DEBUG_LONGTEXT N_( "Set ffmpeg debug mask" )
- /* TODO: Use a predefined list, with 0,1,2,4,7 */
- #define VISMV_TEXT N_( "Visualize motion vectors" )
- #define VISMV_LONGTEXT N_(
- "You can overlay the motion vectors (arrows showing how the images move) "
- "on the image. This value is a mask, based on these values:n"
- "1 - visualize forward predicted MVs of P framesn"
- "2 - visualize forward predicted MVs of B framesn"
- "4 - visualize backward predicted MVs of B framesn"
- "To visualize all vectors, the value should be 7." )
- #define LOWRES_TEXT N_( "Low resolution decoding" )
- #define LOWRES_LONGTEXT N_( "Only decode a low resolution version of "
- "the video. This requires less processing power" )
- #define SKIPLOOPF_TEXT N_( "Skip the loop filter for H.264 decoding" )
- #define SKIPLOOPF_LONGTEXT N_( "Skipping the loop filter (aka deblocking) "
- "usually has a detrimental effect on quality. However it provides a big "
- "speedup for high definition streams." )
- /*
- * Encoder options
- */
- #define ENC_CFG_PREFIX "sout-ffmpeg-"
- #define ENC_KEYINT_TEXT N_( "Ratio of key frames" )
- #define ENC_KEYINT_LONGTEXT N_( "Number of frames "
- "that will be coded for one key frame." )
- #define ENC_BFRAMES_TEXT N_( "Ratio of B frames" )
- #define ENC_BFRAMES_LONGTEXT N_( "Number of "
- "B frames that will be coded between two reference frames." )
- #define ENC_VT_TEXT N_( "Video bitrate tolerance" )
- #define ENC_VT_LONGTEXT N_( "Video bitrate tolerance in kbit/s." )
- #define ENC_INTERLACE_TEXT N_( "Interlaced encoding" )
- #define ENC_INTERLACE_LONGTEXT N_( "Enable dedicated "
- "algorithms for interlaced frames." )
- #define ENC_INTERLACE_ME_TEXT N_( "Interlaced motion estimation" )
- #define ENC_INTERLACE_ME_LONGTEXT N_( "Enable interlaced "
- "motion estimation algorithms. This requires more CPU." )
- #define ENC_PRE_ME_TEXT N_( "Pre-motion estimation" )
- #define ENC_PRE_ME_LONGTEXT N_( "Enable the pre-motion "
- "estimation algorithm.")
- #define ENC_RC_BUF_TEXT N_( "Rate control buffer size" )
- #define ENC_RC_BUF_LONGTEXT N_( "Rate control "
- "buffer size (in kbytes). A bigger buffer will allow for better rate "
- "control, but will cause a delay in the stream." )
- #define ENC_RC_BUF_AGGR_TEXT N_( "Rate control buffer aggressiveness" )
- #define ENC_RC_BUF_AGGR_LONGTEXT N_( "Rate control "
- "buffer aggressiveness." )
- #define ENC_IQUANT_FACTOR_TEXT N_( "I quantization factor" )
- #define ENC_IQUANT_FACTOR_LONGTEXT N_(
- "Quantization factor of I frames, compared with P frames (for instance "
- "1.0 => same qscale for I and P frames)." )
- #define ENC_NOISE_RED_TEXT N_( "Noise reduction" )
- #define ENC_NOISE_RED_LONGTEXT N_( "Enable a simple noise "
- "reduction algorithm to lower the encoding length and bitrate, at the "
- "expense of lower quality frames." )
- #define ENC_MPEG4_MATRIX_TEXT N_( "MPEG4 quantization matrix" )
- #define ENC_MPEG4_MATRIX_LONGTEXT N_( "Use the MPEG4 "
- "quantization matrix for MPEG2 encoding. This generally yields a "
- "better looking picture, while still retaining the compatibility with "
- "standard MPEG2 decoders.")
- #define ENC_HQ_TEXT N_( "Quality level" )
- #define ENC_HQ_LONGTEXT N_( "Quality level "
- "for the encoding of motions vectors (this can slow down the encoding "
- "very much)." )
- #define ENC_HURRYUP_TEXT N_( "Hurry up" )
- #define ENC_HURRYUP_LONGTEXT N_( "The encoder "
- "can make on-the-fly quality tradeoffs if your CPU can't keep up with "
- "the encoding rate. It will disable trellis quantization, then the rate "
- "distortion of motion vectors (hq), and raise the noise reduction "
- "threshold to ease the encoder's task." )
- #define ENC_QMIN_TEXT N_( "Minimum video quantizer scale" )
- #define ENC_QMIN_LONGTEXT N_( "Minimum video "
- "quantizer scale." )
- #define ENC_QMAX_TEXT N_( "Maximum video quantizer scale" )
- #define ENC_QMAX_LONGTEXT N_( "Maximum video "
- "quantizer scale." )
- #define ENC_TRELLIS_TEXT N_( "Trellis quantization" )
- #define ENC_TRELLIS_LONGTEXT N_( "Enable trellis "
- "quantization (rate distortion for block coefficients)." )
- #define ENC_QSCALE_TEXT N_( "Fixed quantizer scale" )
- #define ENC_QSCALE_LONGTEXT N_( "A fixed video "
- "quantizer scale for VBR encoding (accepted values: 0.01 to 255.0)." )
- #define ENC_STRICT_TEXT N_( "Strict standard compliance" )
- #define ENC_STRICT_LONGTEXT N_( "Force a strict standard "
- "compliance when encoding (accepted values: -1, 0, 1)." )
- #define ENC_LUMI_MASKING_TEXT N_( "Luminance masking" )
- #define ENC_LUMI_MASKING_LONGTEXT N_( "Raise the quantizer for "
- "very bright macroblocks (default: 0.0)." )
- #define ENC_DARK_MASKING_TEXT N_( "Darkness masking" )
- #define ENC_DARK_MASKING_LONGTEXT N_( "Raise the quantizer for "
- "very dark macroblocks (default: 0.0)." )
- #define ENC_P_MASKING_TEXT N_( "Motion masking" )
- #define ENC_P_MASKING_LONGTEXT N_( "Raise the quantizer for "
- "macroblocks with a high temporal complexity (default: 0.0)." )
- #define ENC_BORDER_MASKING_TEXT N_( "Border masking" )
- #define ENC_BORDER_MASKING_LONGTEXT N_( "Raise the quantizer "
- "for macroblocks at the border of the frame (default: 0.0)." )
- #define ENC_LUMA_ELIM_TEXT N_( "Luminance elimination" )
- #define ENC_LUMA_ELIM_LONGTEXT N_( "Eliminates luminance blocks when "
- "the PSNR isn't much changed (default: 0.0). The H264 specification "
- "recommends -4." )
- #define ENC_CHROMA_ELIM_TEXT N_( "Chrominance elimination" )
- #define ENC_CHROMA_ELIM_LONGTEXT N_( "Eliminates chrominance blocks when "
- "the PSNR isn't much changed (default: 0.0). The H264 specification "
- "recommends 7." )
- #if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
- #define ENC_PROFILE_TEXT N_( "Specify AAC audio profile to use" )
- #define ENC_PROFILE_LONGTEXT N_( "Specify the AAC audio profile to use "
- "for encoding the audio bitstream. It takes the following options: "
- "main, low, ssr (not supported) and ltp (default: main)" )
- #endif
- #define FFMPEG_COMMON_MEMBERS
- int i_cat;
- int i_codec_id;
- const char *psz_namecodec;
- AVCodecContext *p_context;
- AVCodec *p_codec;
- bool b_delayed_open;
- #ifndef AV_VERSION_INT
- # define AV_VERSION_INT(a, b, c) ((a)<<16 | (b)<<8 | (c))
- #endif