avcodec.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:12k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * avcodec.c: video and audio decoder and encoder using libavcodec
- *****************************************************************************
- * Copyright (C) 1999-2008 the VideoLAN team
- * $Id: 0d4026e275fb4cc9ae49a0dae44f61818d4cbce0 $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Gildas Bazin <gbazin@videolan.org>
- *
- * 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.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_codec.h>
- #include <vlc_avcodec.h>
- /* ffmpeg header */
- #define HAVE_MMX 1
- #ifdef HAVE_LIBAVCODEC_AVCODEC_H
- # include <libavcodec/avcodec.h>
- #elif defined(HAVE_FFMPEG_AVCODEC_H)
- # include <ffmpeg/avcodec.h>
- #else
- # include <avcodec.h>
- #endif
- #if LIBAVCODEC_BUILD < 5000
- # error You must have a libavcodec >= 5000 (get svn)
- #endif
- #include "avcodec.h"
- #include "avutil.h"
- /*****************************************************************************
- * decoder_sys_t: decoder descriptor
- *****************************************************************************/
- struct decoder_sys_t
- {
- /* Common part between video and audio decoder */
- FFMPEG_COMMON_MEMBERS
- };
- /****************************************************************************
- * Local prototypes
- ****************************************************************************/
- static int OpenDecoder( vlc_object_t * );
- static void CloseDecoder( vlc_object_t * );
- static const int nloopf_list[] = { 0, 1, 2, 3, 4 };
- static const char *const nloopf_list_text[] =
- { N_("None"), N_("Non-ref"), N_("Bidir"), N_("Non-key"), N_("All") };
- #ifdef ENABLE_SOUT
- static const char *const enc_hq_list[] = { "rd", "bits", "simple" };
- static const char *const enc_hq_list_text[] = {
- N_("rd"), N_("bits"), N_("simple") };
- #endif
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define MODULE_DESCRIPTION N_( "Various audio and video decoders/encoders"
- "delivered by the FFmpeg library. This includes (MS)MPEG4, DivX, SV1,"
- "H261, H263, H264, WMV, WMA, AAC, AMR, DV, MJPEG and other codecs")
- vlc_module_begin ()
- set_shortname( "FFmpeg")
- add_shortcut( "ffmpeg" )
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_SCODEC )
- /* decoder main module */
- #if defined(MODULE_NAME_is_ffmpegaltivec)
- || (defined(CAN_COMPILE_ALTIVEC) && !defined(NO_ALTIVEC_IN_FFMPEG))
- set_description( N_("AltiVec FFmpeg audio/video decoder ((MS)MPEG4,SVQ1,H263,WMV,WMA)") )
- /*add_requirement( ALTIVEC )*/
- set_capability( "decoder", 71 )
- #else
- set_description( N_("FFmpeg audio/video decoder") )
- set_help( MODULE_DESCRIPTION )
- set_capability( "decoder", 70 )
- #endif
- set_section( N_("Decoding") , NULL )
- set_callbacks( OpenDecoder, CloseDecoder )
- add_bool( "ffmpeg-dr", 1, NULL, DR_TEXT, DR_TEXT, true )
- add_integer ( "ffmpeg-error-resilience", 1, NULL, ERROR_TEXT,
- ERROR_LONGTEXT, true )
- add_integer ( "ffmpeg-workaround-bugs", 1, NULL, BUGS_TEXT, BUGS_LONGTEXT,
- false )
- add_bool( "ffmpeg-hurry-up", 1, NULL, HURRYUP_TEXT, HURRYUP_LONGTEXT,
- false )
- add_integer( "ffmpeg-skip-frame", 0, NULL, SKIP_FRAME_TEXT,
- SKIP_FRAME_LONGTEXT, true )
- change_integer_range( -1, 4 )
- add_integer( "ffmpeg-skip-idct", 0, NULL, SKIP_IDCT_TEXT,
- SKIP_IDCT_LONGTEXT, true )
- change_integer_range( -1, 4 )
- add_integer ( "ffmpeg-vismv", 0, NULL, VISMV_TEXT, VISMV_LONGTEXT,
- true )
- add_integer ( "ffmpeg-lowres", 0, NULL, LOWRES_TEXT, LOWRES_LONGTEXT,
- true )
- change_integer_range( 0, 2 )
- add_bool( "ffmpeg-fast", 0, NULL, FAST_TEXT, FAST_LONGTEXT, true )
- add_integer ( "ffmpeg-skiploopfilter", 0, NULL, SKIPLOOPF_TEXT,
- SKIPLOOPF_LONGTEXT, true )
- change_safe ()
- change_integer_list( nloopf_list, nloopf_list_text, NULL )
- add_integer( "ffmpeg-debug", 0, NULL, DEBUG_TEXT, DEBUG_LONGTEXT,
- true )
- #ifdef ENABLE_SOUT
- /* encoder submodule */
- add_submodule ()
- add_shortcut( "ffmpeg" )
- set_section( N_("Encoding") , NULL )
- set_description( N_("FFmpeg audio/video encoder") )
- set_capability( "encoder", 100 )
- set_callbacks( OpenEncoder, CloseEncoder )
- add_string( ENC_CFG_PREFIX "hq", "simple", NULL, ENC_HQ_TEXT,
- ENC_HQ_LONGTEXT, false )
- change_string_list( enc_hq_list, enc_hq_list_text, 0 )
- add_integer( ENC_CFG_PREFIX "keyint", 0, NULL, ENC_KEYINT_TEXT,
- ENC_KEYINT_LONGTEXT, false )
- add_integer( ENC_CFG_PREFIX "bframes", 0, NULL, ENC_BFRAMES_TEXT,
- ENC_BFRAMES_LONGTEXT, false )
- add_bool( ENC_CFG_PREFIX "hurry-up", 0, NULL, ENC_HURRYUP_TEXT,
- ENC_HURRYUP_LONGTEXT, false )
- add_bool( ENC_CFG_PREFIX "interlace", 0, NULL, ENC_INTERLACE_TEXT,
- ENC_INTERLACE_LONGTEXT, true )
- add_bool( ENC_CFG_PREFIX "interlace-me", 1, NULL, ENC_INTERLACE_ME_TEXT,
- ENC_INTERLACE_ME_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "vt", 0, NULL, ENC_VT_TEXT,
- ENC_VT_LONGTEXT, true )
- add_bool( ENC_CFG_PREFIX "pre-me", 0, NULL, ENC_PRE_ME_TEXT,
- ENC_PRE_ME_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "rc-buffer-size", 224*1024*8, NULL,
- ENC_RC_BUF_TEXT, ENC_RC_BUF_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "rc-buffer-aggressivity", 1.0, NULL,
- ENC_RC_BUF_AGGR_TEXT, ENC_RC_BUF_AGGR_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "i-quant-factor", 0, NULL,
- ENC_IQUANT_FACTOR_TEXT, ENC_IQUANT_FACTOR_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "noise-reduction", 0, NULL,
- ENC_NOISE_RED_TEXT, ENC_NOISE_RED_LONGTEXT, true )
- add_bool( ENC_CFG_PREFIX "mpeg4-matrix", 0, NULL,
- ENC_MPEG4_MATRIX_TEXT, ENC_MPEG4_MATRIX_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "qmin", 0, NULL,
- ENC_QMIN_TEXT, ENC_QMIN_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "qmax", 0, NULL,
- ENC_QMAX_TEXT, ENC_QMAX_LONGTEXT, true )
- add_bool( ENC_CFG_PREFIX "trellis", 0, NULL,
- ENC_TRELLIS_TEXT, ENC_TRELLIS_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "qscale", 0, NULL,
- ENC_QSCALE_TEXT, ENC_QSCALE_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "strict", 0, NULL,
- ENC_STRICT_TEXT, ENC_STRICT_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "lumi-masking", 0.0, NULL,
- ENC_LUMI_MASKING_TEXT, ENC_LUMI_MASKING_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "dark-masking", 0.0, NULL,
- ENC_DARK_MASKING_TEXT, ENC_DARK_MASKING_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "p-masking", 0.0, NULL,
- ENC_P_MASKING_TEXT, ENC_P_MASKING_LONGTEXT, true )
- add_float( ENC_CFG_PREFIX "border-masking", 0.0, NULL,
- ENC_BORDER_MASKING_TEXT, ENC_BORDER_MASKING_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "luma-elim-threshold", 0, NULL,
- ENC_LUMA_ELIM_TEXT, ENC_LUMA_ELIM_LONGTEXT, true )
- add_integer( ENC_CFG_PREFIX "chroma-elim-threshold", 0, NULL,
- ENC_CHROMA_ELIM_TEXT, ENC_CHROMA_ELIM_LONGTEXT, true )
- #if LIBAVCODEC_VERSION_INT >= ((51<<16)+(40<<8)+4)
- /* Audio AAC encoder profile */
- add_string( ENC_CFG_PREFIX "aac-profile", "low", NULL,
- ENC_PROFILE_TEXT, ENC_PROFILE_LONGTEXT, true )
- #endif
- #endif /* ENABLE_SOUT */
- /* video filter submodule */
- add_submodule ()
- set_capability( "video filter2", 0 )
- set_callbacks( OpenDeinterlace, CloseDeinterlace )
- set_description( N_("FFmpeg deinterlace video filter") )
- add_shortcut( "ffmpeg-deinterlace" )
- vlc_module_end ()
- /*****************************************************************************
- * OpenDecoder: probe the decoder and return score
- *****************************************************************************/
- static int OpenDecoder( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t*) p_this;
- int i_cat, i_codec_id, i_result;
- const char *psz_namecodec;
- AVCodecContext *p_context = NULL;
- AVCodec *p_codec = NULL;
- /* *** determine codec type *** */
- if( !GetFfmpegCodec( p_dec->fmt_in.i_codec, &i_cat, &i_codec_id,
- &psz_namecodec ) )
- {
- return VLC_EGENERIC;
- }
- /* Initialization must be done before avcodec_find_decoder() */
- InitLibavcodec(p_this);
- /* *** ask ffmpeg for a decoder *** */
- p_codec = avcodec_find_decoder( i_codec_id );
- if( !p_codec )
- {
- msg_Dbg( p_dec, "codec not found (%s)", psz_namecodec );
- return VLC_EGENERIC;
- }
- /* *** get a p_context *** */
- p_context = avcodec_alloc_context();
- if( !p_context )
- return VLC_ENOMEM;
- p_context->debug = config_GetInt( p_dec, "ffmpeg-debug" );
- p_context->opaque = (void *)p_this;
- /* Set CPU capabilities */
- unsigned i_cpu = vlc_CPU();
- p_context->dsp_mask = 0;
- if( !(i_cpu & CPU_CAPABILITY_MMX) )
- {
- p_context->dsp_mask |= FF_MM_MMX;
- }
- if( !(i_cpu & CPU_CAPABILITY_MMXEXT) )
- {
- p_context->dsp_mask |= FF_MM_MMXEXT;
- }
- if( !(i_cpu & CPU_CAPABILITY_3DNOW) )
- {
- p_context->dsp_mask |= FF_MM_3DNOW;
- }
- if( !(i_cpu & CPU_CAPABILITY_SSE) )
- {
- p_context->dsp_mask |= FF_MM_SSE;
- }
- if( !(i_cpu & CPU_CAPABILITY_SSE2) )
- {
- p_context->dsp_mask |= FF_MM_SSE2;
- }
- p_dec->b_need_packetized = true;
- switch( i_cat )
- {
- case VIDEO_ES:
- p_dec->pf_decode_video = DecodeVideo;
- i_result = InitVideoDec ( p_dec, p_context, p_codec,
- i_codec_id, psz_namecodec );
- break;
- case AUDIO_ES:
- p_dec->pf_decode_audio = DecodeAudio;
- i_result = InitAudioDec ( p_dec, p_context, p_codec,
- i_codec_id, psz_namecodec );
- break;
- default:
- i_result = VLC_EGENERIC;
- }
- if( i_result == VLC_SUCCESS ) p_dec->p_sys->i_cat = i_cat;
- return i_result;
- }
- /*****************************************************************************
- * CloseDecoder: decoder destruction
- *****************************************************************************/
- static void CloseDecoder( vlc_object_t *p_this )
- {
- decoder_t *p_dec = (decoder_t *)p_this;
- decoder_sys_t *p_sys = p_dec->p_sys;
- switch( p_sys->i_cat )
- {
- case AUDIO_ES:
- EndAudioDec ( p_dec );
- break;
- case VIDEO_ES:
- EndVideoDec ( p_dec );
- break;
- }
- if( p_sys->p_context )
- {
- free( p_sys->p_context->extradata );
- p_sys->p_context->extradata = NULL;
- if( !p_sys->b_delayed_open )
- {
- vlc_avcodec_lock();
- avcodec_close( p_sys->p_context );
- vlc_avcodec_unlock();
- }
- msg_Dbg( p_dec, "ffmpeg codec (%s) stopped", p_sys->psz_namecodec );
- av_free( p_sys->p_context );
- }
- free( p_sys );
- }
- void InitLibavcodec( vlc_object_t *p_object )
- {
- static bool b_ffmpeginit = false;
- vlc_avcodec_lock();
- /* *** init ffmpeg library (libavcodec) *** */
- if( !b_ffmpeginit )
- {
- avcodec_init();
- avcodec_register_all();
- av_log_set_callback( LibavutilCallback );
- b_ffmpeginit = true;
- msg_Dbg( p_object, "libavcodec initialized (interface 0x%x)",
- LIBAVCODEC_VERSION_INT );
- }
- else
- {
- msg_Dbg( p_object, "libavcodec already initialized" );
- }
- vlc_avcodec_unlock();
- }