video.c
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:35k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * video.c: video decoder using the ffmpeg library
- *****************************************************************************
- * Copyright (C) 1999-2001 the VideoLAN team
- * $Id: b606cffb6e7487484308c827a5e5b888e621eedc $
- *
- * 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_codec.h>
- #include <vlc_vout.h>
- #include <vlc_codecs.h> /* BITMAPINFOHEADER */
- #include <vlc_avcodec.h>
- /* ffmpeg header */
- #ifdef HAVE_LIBAVCODEC_AVCODEC_H
- # include <libavcodec/avcodec.h>
- #elif defined(HAVE_FFMPEG_AVCODEC_H)
- # include <ffmpeg/avcodec.h>
- #else
- # include <avcodec.h>
- #endif
- #include "avcodec.h"
- /*****************************************************************************
- * decoder_sys_t : decoder descriptor
- *****************************************************************************/
- struct decoder_sys_t
- {
- FFMPEG_COMMON_MEMBERS
- /* Video decoder specific part */
- mtime_t input_pts;
- mtime_t input_dts;
- mtime_t i_pts;
- AVFrame *p_ff_pic;
- /* for frame skipping algo */
- bool b_hurry_up;
- enum AVDiscard i_skip_frame;
- enum AVDiscard i_skip_idct;
- /* how many decoded frames are late */
- int i_late_frames;
- mtime_t i_late_frames_start;
- /* for direct rendering */
- bool b_direct_rendering;
- bool b_has_b_frames;
- /* Hack to force display of still pictures */
- bool b_first_frame;
- int i_buffer_orig, i_buffer;
- char *p_buffer_orig, *p_buffer;
- /* */
- AVPaletteControl palette;
- /* */
- bool b_flush;
- };
- /* FIXME (dummy palette for now) */
- static const AVPaletteControl palette_control;
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void ffmpeg_InitCodec ( decoder_t * );
- static int ffmpeg_OpenCodec ( decoder_t * );
- static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
- static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
- static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
- static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
- static void ffmpeg_NextPts( decoder_t * );
- static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
- {
- uint8_t *p = (uint8_t*)&fcc;
- return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
- }
- /*****************************************************************************
- * Local Functions
- *****************************************************************************/
- /* Returns a new picture buffer */
- static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
- AVCodecContext *p_context )
- {
- picture_t *p_pic;
- p_dec->fmt_out.video.i_width = p_context->width;
- p_dec->fmt_out.video.i_height = p_context->height;
- if( !p_context->width || !p_context->height )
- {
- return NULL; /* invalid display size */
- }
- if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
- {
- /* we are doomed, but not really, because most codecs set their pix_fmt much later */
- p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
- }
- p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
- /* If an aspect-ratio was specified in the input format then force it */
- if( p_dec->fmt_in.video.i_aspect )
- {
- p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
- }
- else
- {
- p_dec->fmt_out.video.i_aspect =
- VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
- p_context->width / p_context->height );
- p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
- p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
- if( p_dec->fmt_out.video.i_aspect == 0 )
- {
- p_dec->fmt_out.video.i_aspect =
- VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
- }
- }
- if( p_dec->fmt_in.video.i_frame_rate > 0 &&
- p_dec->fmt_in.video.i_frame_rate_base > 0 )
- {
- p_dec->fmt_out.video.i_frame_rate =
- p_dec->fmt_in.video.i_frame_rate;
- p_dec->fmt_out.video.i_frame_rate_base =
- p_dec->fmt_in.video.i_frame_rate_base;
- }
- else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
- {
- p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
- p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
- }
- p_pic = decoder_NewPicture( p_dec );
- return p_pic;
- }
- /*****************************************************************************
- * InitVideo: initialize the video decoder
- *****************************************************************************
- * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
- * opened (done after the first decoded frame).
- *****************************************************************************/
- int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
- AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
- {
- decoder_sys_t *p_sys;
- vlc_value_t val;
- /* Allocate the memory needed to store the decoder's structure */
- if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
- return VLC_ENOMEM;
- p_sys->p_context = p_context;
- p_sys->p_codec = p_codec;
- p_sys->i_codec_id = i_codec_id;
- p_sys->psz_namecodec = psz_namecodec;
- p_sys->p_ff_pic = avcodec_alloc_frame();
- p_sys->b_delayed_open = true;
- /* ***** Fill p_context with init values ***** */
- p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
- /* ***** Get configuration of ffmpeg plugin ***** */
- p_sys->p_context->workaround_bugs =
- config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- p_sys->p_context->error_resilience =
- config_GetInt( p_dec, "ffmpeg-error-resilience" );
- #else
- p_sys->p_context->error_recognition =
- config_GetInt( p_dec, "ffmpeg-error-resilience" );
- #endif
- var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "grayscale", &val );
- if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
- var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-vismv", &val );
- if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
- var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-lowres", &val );
- if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
- var_Create( p_dec, "ffmpeg-skiploopfilter",
- VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
- if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
- if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
- if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
- if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
- bool b_fast = var_CreateGetBool( p_dec, "ffmpeg-fast" );
- if( b_fast ) p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
- /* ***** ffmpeg frame skipping ***** */
- var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-hurry-up", &val );
- p_sys->b_hurry_up = val.b_bool;
- var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-skip-frame", &val );
- switch( val.i_int )
- {
- case -1:
- p_sys->p_context->skip_frame = AVDISCARD_NONE;
- break;
- case 0:
- p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
- break;
- case 1:
- p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
- break;
- case 2:
- p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
- break;
- case 3:
- p_sys->p_context->skip_frame = AVDISCARD_ALL;
- break;
- default:
- p_sys->p_context->skip_frame = AVDISCARD_NONE;
- break;
- }
- p_sys->i_skip_frame = p_sys->p_context->skip_frame;
- var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-skip-idct", &val );
- switch( val.i_int )
- {
- case -1:
- p_sys->p_context->skip_idct = AVDISCARD_NONE;
- break;
- case 0:
- p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
- break;
- case 1:
- p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
- break;
- case 2:
- p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
- break;
- case 3:
- p_sys->p_context->skip_idct = AVDISCARD_ALL;
- break;
- default:
- p_sys->p_context->skip_idct = AVDISCARD_NONE;
- break;
- }
- p_sys->i_skip_idct = p_sys->p_context->skip_idct;
- /* ***** ffmpeg direct rendering ***** */
- p_sys->b_direct_rendering = false;
- var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-dr", &val );
- if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
- /* Apparently direct rendering doesn't work with YUV422P */
- p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
- /* H264 uses too many reference frames */
- p_sys->i_codec_id != CODEC_ID_H264 &&
- /* No idea why ... but this fixes flickering on some TSCC streams */
- p_sys->i_codec_id != CODEC_ID_TSCC &&
- !p_sys->p_context->debug_mv )
- {
- /* Some codecs set pix_fmt only after the 1st frame has been decoded,
- * so we need to do another check in ffmpeg_GetFrameBuf() */
- p_sys->b_direct_rendering = true;
- }
- /* ffmpeg doesn't properly release old pictures when frames are skipped */
- //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
- if( p_sys->b_direct_rendering )
- {
- msg_Dbg( p_dec, "using direct rendering" );
- p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
- }
- /* Always use our get_buffer wrapper so we can calculate the
- * PTS correctly */
- p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
- p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
- p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
- p_sys->p_context->opaque = p_dec;
- /* ***** misc init ***** */
- p_sys->input_pts = p_sys->input_dts = 0;
- p_sys->i_pts = 0;
- p_sys->b_has_b_frames = false;
- p_sys->b_first_frame = true;
- p_sys->b_flush = false;
- p_sys->i_late_frames = 0;
- p_sys->i_buffer = 0;
- p_sys->i_buffer_orig = 1;
- p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
- if( !p_sys->p_buffer_orig )
- {
- av_free( p_sys->p_ff_pic );
- free( p_sys );
- return VLC_ENOMEM;
- }
- /* Set output properties */
- p_dec->fmt_out.i_cat = VIDEO_ES;
- if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
- {
- /* we are doomed. but not really, because most codecs set their pix_fmt later on */
- p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
- }
- p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
- /* Setup palette */
- memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
- if( p_dec->fmt_in.video.p_palette )
- {
- p_sys->palette.palette_changed = 1;
- for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
- {
- union {
- uint32_t u;
- uint8_t a[4];
- } c;
- c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
- c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
- c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
- c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
- p_sys->palette.palette[i] = c.u;
- }
- p_sys->p_context->palctrl = &p_sys->palette;
- p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
- if( p_dec->fmt_out.video.p_palette )
- *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
- }
- else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
- {
- p_sys->p_context->palctrl = &p_sys->palette;
- }
- /* ***** init this codec with special data ***** */
- ffmpeg_InitCodec( p_dec );
- /* ***** Open the codec ***** */
- if( ffmpeg_OpenCodec( p_dec ) < 0 )
- {
- msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
- av_free( p_sys->p_ff_pic );
- free( p_sys->p_buffer_orig );
- free( p_sys );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DecodeVideo: Called to decode one or more frames
- *****************************************************************************/
- picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- int b_drawpicture;
- int b_null_size = false;
- block_t *p_block;
- if( !pp_block || !*pp_block )
- return NULL;
- if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
- {
- ffmpeg_InitCodec( p_dec );
- if( p_sys->b_delayed_open )
- {
- if( ffmpeg_OpenCodec( p_dec ) )
- msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
- }
- }
- p_block = *pp_block;
- if( p_sys->b_delayed_open )
- {
- block_Release( p_block );
- return NULL;
- }
- if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
- {
- p_sys->i_buffer = 0;
- p_sys->i_pts = 0; /* To make sure we recover properly */
- p_sys->input_pts = p_sys->input_dts = 0;
- p_sys->i_late_frames = 0;
- block_Release( p_block );
- //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
- //avcodec_flush_buffers( p_sys->p_context );
- return NULL;
- }
- if( p_block->i_flags & BLOCK_FLAG_PREROLL )
- {
- /* Do not care about late frames when prerolling
- * TODO avoid decoding of non reference frame
- * (ie all B except for H264 where it depends only on nal_ref_idc) */
- p_sys->i_late_frames = 0;
- }
- if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
- (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
- {
- if( p_sys->i_pts )
- {
- msg_Err( p_dec, "more than 5 seconds of late video -> "
- "dropping frame (computer too slow ?)" );
- p_sys->i_pts = 0; /* To make sure we recover properly */
- }
- block_Release( p_block );
- p_sys->i_late_frames--;
- return NULL;
- }
- if( p_block->i_pts > 0 || p_block->i_dts > 0 )
- {
- p_sys->input_pts = p_block->i_pts;
- p_sys->input_dts = p_block->i_dts;
- /* Make sure we don't reuse the same timestamps twice */
- p_block->i_pts = p_block->i_dts = 0;
- }
- /* A good idea could be to decode all I pictures and see for the other */
- if( !p_dec->b_pace_control &&
- p_sys->b_hurry_up &&
- (p_sys->i_late_frames > 4) )
- {
- b_drawpicture = 0;
- if( p_sys->i_late_frames < 12 )
- {
- p_sys->p_context->skip_frame =
- (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
- AVDISCARD_BIDIR : p_sys->i_skip_frame;
- }
- else
- {
- /* picture too late, won't decode
- * but break picture until a new I, and for mpeg4 ...*/
- p_sys->i_late_frames--; /* needed else it will never be decrease */
- block_Release( p_block );
- p_sys->i_buffer = 0;
- return NULL;
- }
- }
- else
- {
- if( p_sys->b_hurry_up )
- p_sys->p_context->skip_frame = p_sys->i_skip_frame;
- if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
- b_drawpicture = 1;
- else
- b_drawpicture = 0;
- }
- if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
- {
- if( p_sys->b_hurry_up )
- p_sys->p_context->skip_frame = p_sys->i_skip_frame;
- b_null_size = true;
- }
- else if( !b_drawpicture )
- {
- /* It creates broken picture
- * FIXME either our parser or ffmpeg is broken */
- #if 0
- if( p_sys->b_hurry_up )
- p_sys->p_context->skip_frame = __MAX( p_sys->p_context->skip_frame,
- AVDISCARD_NONREF );
- #endif
- }
- /*
- * Do the actual decoding now
- */
- /* Don't forget that ffmpeg requires a little more bytes
- * that the real frame size */
- if( p_block->i_buffer > 0 )
- {
- p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
- p_sys->i_buffer = p_block->i_buffer;
- if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
- p_sys->i_buffer_orig )
- {
- free( p_sys->p_buffer_orig );
- p_sys->i_buffer_orig =
- p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
- p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
- }
- p_sys->p_buffer = p_sys->p_buffer_orig;
- p_sys->i_buffer = p_block->i_buffer;
- if( !p_sys->p_buffer )
- {
- block_Release( p_block );
- return NULL;
- }
- vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
- memset( p_sys->p_buffer + p_block->i_buffer, 0,
- FF_INPUT_BUFFER_PADDING_SIZE );
- p_block->i_buffer = 0;
- }
- while( p_sys->i_buffer > 0 || p_sys->b_flush )
- {
- int i_used, b_gotpicture;
- picture_t *p_pic;
- i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
- &b_gotpicture,
- p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
- if( b_null_size && p_sys->p_context->width > 0 &&
- p_sys->p_context->height > 0 &&
- !p_sys->b_flush )
- {
- /* Reparse it to not drop the I frame */
- b_null_size = false;
- if( p_sys->b_hurry_up )
- p_sys->p_context->skip_frame = p_sys->i_skip_frame;
- i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
- &b_gotpicture,
- (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
- }
- if( p_sys->b_flush )
- p_sys->b_first_frame = true;
- if( p_sys->i_buffer <= 0 )
- p_sys->b_flush = false;
- if( i_used < 0 )
- {
- if( b_drawpicture )
- msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
- p_sys->i_buffer );
- block_Release( p_block );
- return NULL;
- }
- else if( i_used > p_sys->i_buffer )
- {
- i_used = p_sys->i_buffer;
- }
- /* Consumed bytes */
- p_sys->i_buffer -= i_used;
- p_sys->p_buffer += i_used;
- /* Nothing to display */
- if( !b_gotpicture )
- {
- if( i_used == 0 ) break;
- continue;
- }
- /* Set the PTS */
- if( p_sys->p_ff_pic->pts )
- p_sys->i_pts = p_sys->p_ff_pic->pts;
- /* Update frame late count (except when doing preroll) */
- mtime_t i_display_date = 0;
- if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
- i_display_date = decoder_GetDisplayDate( p_dec, p_sys->i_pts );
- if( i_display_date > 0 && i_display_date <= mdate() )
- {
- p_sys->i_late_frames++;
- if( p_sys->i_late_frames == 1 )
- p_sys->i_late_frames_start = mdate();
- }
- else
- {
- p_sys->i_late_frames = 0;
- }
- if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
- {
- /* Do not display the picture */
- p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
- if( !b_drawpicture && p_pic )
- decoder_DeletePicture( p_dec, p_pic );
- ffmpeg_NextPts( p_dec );
- continue;
- }
- if( !p_sys->p_ff_pic->opaque )
- {
- /* Get a new picture */
- p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
- if( !p_pic )
- {
- block_Release( p_block );
- return NULL;
- }
- /* Fill p_picture_t from AVVideoFrame and do chroma conversion
- * if needed */
- ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
- }
- else
- {
- p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
- }
- /* Sanity check (seems to be needed for some streams) */
- if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
- {
- p_sys->b_has_b_frames = true;
- }
- if( !p_dec->fmt_in.video.i_aspect )
- {
- /* Fetch again the aspect ratio in case it changed */
- p_dec->fmt_out.video.i_aspect =
- VOUT_ASPECT_FACTOR
- * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
- * p_sys->p_context->width / p_sys->p_context->height );
- p_dec->fmt_out.video.i_sar_num
- = p_sys->p_context->sample_aspect_ratio.num;
- p_dec->fmt_out.video.i_sar_den
- = p_sys->p_context->sample_aspect_ratio.den;
- if( p_dec->fmt_out.video.i_aspect == 0 )
- {
- p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
- * p_sys->p_context->width / p_sys->p_context->height;
- }
- }
- /* Send decoded frame to vout */
- if( p_sys->i_pts )
- {
- p_pic->date = p_sys->i_pts;
- ffmpeg_NextPts( p_dec );
- if( p_sys->b_first_frame )
- {
- /* Hack to force display of still pictures */
- p_sys->b_first_frame = false;
- p_pic->b_force = true;
- }
- p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
- p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
- p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
- p_pic->i_qstride = p_sys->p_ff_pic->qstride;
- int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
- p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
- memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
- p_pic->i_qstride * i_mb_h );
- switch( p_sys->p_ff_pic->qscale_type )
- {
- case FF_QSCALE_TYPE_MPEG1:
- p_pic->i_qtype = QTYPE_MPEG1;
- break;
- case FF_QSCALE_TYPE_MPEG2:
- p_pic->i_qtype = QTYPE_MPEG2;
- break;
- case FF_QSCALE_TYPE_H264:
- p_pic->i_qtype = QTYPE_H264;
- break;
- }
- return p_pic;
- }
- else
- {
- decoder_DeletePicture( p_dec, p_pic );
- }
- }
- block_Release( p_block );
- return NULL;
- }
- /*****************************************************************************
- * EndVideo: decoder destruction
- *****************************************************************************
- * This function is called when the thread ends after a successful
- * initialization.
- *****************************************************************************/
- void EndVideoDec( decoder_t *p_dec )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
- free( p_sys->p_buffer_orig );
- }
- /*****************************************************************************
- * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
- *****************************************************************************/
- static void ffmpeg_InitCodec( decoder_t *p_dec )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- int i_size = p_dec->fmt_in.i_extra;
- if( !i_size ) return;
- if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
- {
- uint8_t *p;
- p_sys->p_context->extradata_size = i_size + 12;
- p = p_sys->p_context->extradata =
- malloc( p_sys->p_context->extradata_size );
- if( !p )
- return;
- memcpy( &p[0], "SVQ3", 4 );
- memset( &p[4], 0, 8 );
- memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
- /* Now remove all atoms before the SMI one */
- if( p_sys->p_context->extradata_size > 0x5a &&
- strncmp( (char*)&p[0x56], "SMI ", 4 ) )
- {
- uint8_t *psz = &p[0x52];
- while( psz < &p[p_sys->p_context->extradata_size - 8] )
- {
- int i_size = GetDWBE( psz );
- if( i_size <= 1 )
- {
- /* FIXME handle 1 as long size */
- break;
- }
- if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
- {
- memmove( &p[0x52], psz,
- &p[p_sys->p_context->extradata_size] - psz );
- break;
- }
- psz += i_size;
- }
- }
- }
- else
- {
- p_sys->p_context->extradata_size = i_size;
- p_sys->p_context->extradata =
- malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
- if( p_sys->p_context->extradata )
- {
- memcpy( p_sys->p_context->extradata,
- p_dec->fmt_in.p_extra, i_size );
- memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
- 0, FF_INPUT_BUFFER_PADDING_SIZE );
- }
- }
- }
- /*****************************************************************************
- * ffmpeg_OpenCodec:
- *****************************************************************************/
- static int ffmpeg_OpenCodec( decoder_t *p_dec )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- if( p_sys->p_context->extradata_size <= 0 )
- {
- if( p_sys->i_codec_id == CODEC_ID_VC1 ||
- p_sys->i_codec_id == CODEC_ID_VORBIS ||
- p_sys->i_codec_id == CODEC_ID_THEORA )
- {
- msg_Warn( p_dec, "waiting for extra data for codec %s",
- p_sys->psz_namecodec );
- return 1;
- }
- }
- p_sys->p_context->width = p_dec->fmt_in.video.i_width;
- p_sys->p_context->height = p_dec->fmt_in.video.i_height;
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
- #else
- p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
- #endif
- int ret;
- vlc_avcodec_lock();
- ret = avcodec_open( p_sys->p_context, p_sys->p_codec );
- vlc_avcodec_unlock();
- if( ret < 0 )
- return VLC_EGENERIC;
- msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
- p_sys->b_delayed_open = false;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
- * picture_t structure (when not in direct rendering mode).
- *****************************************************************************/
- static void ffmpeg_CopyPicture( decoder_t *p_dec,
- picture_t *p_pic, AVFrame *p_ff_pic )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
- {
- int i_plane, i_size, i_line;
- uint8_t *p_dst, *p_src;
- int i_src_stride, i_dst_stride;
- for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
- {
- p_src = p_ff_pic->data[i_plane];
- p_dst = p_pic->p[i_plane].p_pixels;
- i_src_stride = p_ff_pic->linesize[i_plane];
- i_dst_stride = p_pic->p[i_plane].i_pitch;
- i_size = __MIN( i_src_stride, i_dst_stride );
- for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
- i_line++ )
- {
- vlc_memcpy( p_dst, p_src, i_size );
- p_src += i_src_stride;
- p_dst += i_dst_stride;
- }
- }
- }
- else
- {
- msg_Err( p_dec, "don't know how to convert chroma %i",
- p_sys->p_context->pix_fmt );
- p_dec->b_error = 1;
- }
- }
- /*****************************************************************************
- * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
- *****************************************************************************
- * It is used for direct rendering as well as to get the right PTS for each
- * decoded picture (even in indirect rendering mode).
- *****************************************************************************/
- static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
- static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
- AVFrame *p_ff_pic )
- {
- decoder_t *p_dec = (decoder_t *)p_context->opaque;
- decoder_sys_t *p_sys = p_dec->p_sys;
- picture_t *p_pic;
- /* Set picture PTS */
- ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
- /* */
- p_ff_pic->opaque = 0;
- /* Not much to do in indirect rendering mode */
- if( !p_sys->b_direct_rendering )
- {
- return avcodec_default_get_buffer( p_context, p_ff_pic );
- }
- /* Some codecs set pix_fmt only after the 1st frame has been decoded,
- * so we need to check for direct rendering again. */
- int i_width = p_sys->p_context->width;
- int i_height = p_sys->p_context->height;
- avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
- if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
- p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
- /* We only pad picture up to 16 */
- PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height ||
- p_context->pix_fmt == PIX_FMT_PAL8 )
- return avcodec_default_get_buffer( p_context, p_ff_pic );
- p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
- /* Get a new picture */
- //p_sys->p_vout->render.b_allow_modify_pics = 0;
- p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
- if( !p_pic )
- return avcodec_default_get_buffer( p_context, p_ff_pic );
- p_sys->p_context->draw_horiz_band = NULL;
- p_ff_pic->opaque = (void*)p_pic;
- p_ff_pic->type = FF_BUFFER_TYPE_USER;
- p_ff_pic->data[0] = p_pic->p[0].p_pixels;
- p_ff_pic->data[1] = p_pic->p[1].p_pixels;
- p_ff_pic->data[2] = p_pic->p[2].p_pixels;
- p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
- p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
- p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
- p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
- p_ff_pic->linesize[3] = 0;
- decoder_LinkPicture( p_dec, p_pic );
- /* FIXME what is that, should give good value */
- p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
- return 0;
- }
- static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
- {
- decoder_t *p_dec = (decoder_t *)p_context->opaque;
- int i_ret;
- /* */
- p_ff_pic->pts = AV_NOPTS_VALUE;
- /* We always use default reget function, it works perfectly fine */
- i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
- /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
- * ffmpeg_GetFrameBuf call) */
- if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
- ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
- return i_ret;
- }
- static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- /* Set picture PTS */
- if( p_sys->input_pts )
- {
- p_ff_pic->pts = p_sys->input_pts;
- }
- else if( p_sys->input_dts )
- {
- /* Some demuxers only set the dts so let's try to find a useful
- * timestamp from this */
- if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
- !p_ff_pic->reference || !p_sys->i_pts )
- {
- p_ff_pic->pts = p_sys->input_dts;
- }
- else
- {
- p_ff_pic->pts = 0;
- }
- }
- else
- {
- p_ff_pic->pts = 0;
- }
- if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
- {
- p_sys->input_pts = p_sys->input_dts = 0;
- }
- }
- static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
- AVFrame *p_ff_pic )
- {
- decoder_t *p_dec = (decoder_t *)p_context->opaque;
- if( !p_ff_pic->opaque )
- {
- avcodec_default_release_buffer( p_context, p_ff_pic );
- return;
- }
- picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
- decoder_UnlinkPicture( p_dec, p_pic );
- p_ff_pic->data[0] = NULL;
- p_ff_pic->data[1] = NULL;
- p_ff_pic->data[2] = NULL;
- p_ff_pic->data[3] = NULL;
- }
- static void ffmpeg_NextPts( decoder_t *p_dec )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- if( p_sys->i_pts <= 0 )
- return;
- /* interpolate the next PTS */
- if( p_dec->fmt_in.video.i_frame_rate > 0 &&
- p_dec->fmt_in.video.i_frame_rate_base > 0 )
- {
- p_sys->i_pts += INT64_C(1000000) *
- (2 + p_sys->p_ff_pic->repeat_pict) *
- p_dec->fmt_in.video.i_frame_rate_base /
- (2 * p_dec->fmt_in.video.i_frame_rate);
- }
- else if( p_sys->p_context->time_base.den > 0 )
- {
- #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52,20,0)
- int i_tick = p_sys->p_context->ticks_per_frame;
- if( i_tick <= 0 )
- i_tick = 1;
- #else
- int i_tick = 1;
- #endif
- p_sys->i_pts += INT64_C(1000000) *
- (2 + p_sys->p_ff_pic->repeat_pict) *
- i_tick * p_sys->p_context->time_base.num /
- (2 * p_sys->p_context->time_base.den);
- }
- }