video.c
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上传日期:2009-03-27
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文件大小:28k
- /*****************************************************************************
- * video.c: video decoder using the ffmpeg library
- *****************************************************************************
- * Copyright (C) 1999-2001 VideoLAN
- * $Id: video.c 9156 2004-11-05 14:57:53Z gbazin $
- *
- * 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <vlc/vlc.h>
- #include <vlc/decoder.h>
- /* ffmpeg header */
- #ifdef HAVE_FFMPEG_AVCODEC_H
- # include <ffmpeg/avcodec.h>
- #else
- # include <avcodec.h>
- #endif
- #include "ffmpeg.h"
- /*****************************************************************************
- * decoder_sys_t : decoder descriptor
- *****************************************************************************/
- struct decoder_sys_t
- {
- /* Common part between video and audio decoder */
- int i_cat;
- int i_codec_id;
- char *psz_namecodec;
- AVCodecContext *p_context;
- AVCodec *p_codec;
- /* Video decoder specific part */
- mtime_t input_pts;
- mtime_t input_dts;
- mtime_t i_pts;
- AVFrame *p_ff_pic;
- BITMAPINFOHEADER *p_format;
- /* for frame skipping algo */
- int b_hurry_up;
- int i_frame_skip;
- /* how many decoded frames are late */
- int i_late_frames;
- mtime_t i_late_frames_start;
- /* for direct rendering */
- int b_direct_rendering;
- vlc_bool_t b_has_b_frames;
- /* Hack to force display of still pictures */
- vlc_bool_t b_first_frame;
- int i_buffer_orig, i_buffer;
- char *p_buffer_orig, *p_buffer;
- /* Postprocessing handle */
- void *p_pp;
- vlc_bool_t b_pp;
- vlc_bool_t b_pp_async;
- vlc_bool_t b_pp_init;
- };
- /* FIXME (dummy palette for now) */
- static AVPaletteControl palette_control;
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
- static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
- static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
- 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
- *****************************************************************************/
- static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
- {
- switch( i_ff_chroma )
- {
- case PIX_FMT_YUV420P:
- return VLC_FOURCC('I','4','2','0');
- case PIX_FMT_YUV422P:
- return VLC_FOURCC('I','4','2','2');
- case PIX_FMT_YUV444P:
- return VLC_FOURCC('I','4','4','4');
- case PIX_FMT_YUV422:
- return VLC_FOURCC('Y','U','Y','2');
- case PIX_FMT_RGB555:
- return VLC_FOURCC('R','V','1','5');
- case PIX_FMT_RGB565:
- return VLC_FOURCC('R','V','1','6');
- case PIX_FMT_RGB24:
- return VLC_FOURCC('R','V','2','4');
- case PIX_FMT_RGBA32:
- return VLC_FOURCC('R','V','3','2');
- case PIX_FMT_GRAY8:
- return VLC_FOURCC('G','R','E','Y');
- case PIX_FMT_YUV410P:
- case PIX_FMT_YUV411P:
- case PIX_FMT_BGR24:
- default:
- return 0;
- }
- }
- /* Returns a new picture buffer */
- static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
- AVCodecContext *p_context )
- {
- decoder_sys_t *p_sys = p_dec->p_sys;
- picture_t *p_pic;
- p_dec->fmt_out.video.i_width = p_context->width;
- p_dec->fmt_out.video.i_height = p_context->height;
- p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
- if( !p_context->width || !p_context->height )
- {
- return NULL; /* invalid display size */
- }
- if( !p_dec->fmt_out.i_codec )
- {
- /* we make conversion if possible*/
- p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
- }
- /* 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
- {
- #if LIBAVCODEC_BUILD >= 4687
- p_dec->fmt_out.video.i_aspect =
- VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
- p_context->width / p_context->height );
- #else
- p_dec->fmt_out.video.i_aspect =
- VOUT_ASPECT_FACTOR * p_context->aspect_ratio;
- #endif
- 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_context->frame_rate > 0 && p_context->frame_rate_base > 0 )
- {
- p_dec->fmt_out.video.i_frame_rate = p_context->frame_rate;
- p_dec->fmt_out.video.i_frame_rate_base = p_context->frame_rate_base;
- }
- p_pic = p_dec->pf_vout_buffer_new( p_dec );
- #ifdef LIBAVCODEC_PP
- if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
- {
- E_(InitPostproc)( p_dec, p_sys->p_pp, p_context->width,
- p_context->height, p_context->pix_fmt );
- p_sys->b_pp_init = VLC_TRUE;
- }
- #endif
- 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 E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
- AVCodec *p_codec, int i_codec_id, char *psz_namecodec )
- {
- decoder_sys_t *p_sys;
- vlc_value_t lockval;
- vlc_value_t val;
- var_Get( p_dec->p_libvlc, "avcodec", &lockval );
- /* Allocate the memory needed to store the decoder's structure */
- if( ( p_dec->p_sys = p_sys =
- (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
- {
- msg_Err( p_dec, "out of memory" );
- return VLC_EGENERIC;
- }
- p_dec->p_sys->p_context = p_context;
- p_dec->p_sys->p_codec = p_codec;
- p_dec->p_sys->i_codec_id = i_codec_id;
- p_dec->p_sys->psz_namecodec = psz_namecodec;
- p_sys->p_ff_pic = avcodec_alloc_frame();
- /* ***** Fill p_context with init values ***** */
- /* FIXME: remove when ffmpeg deals properly with avc1 */
- if( p_dec->fmt_in.i_codec != VLC_FOURCC('a','v','c','1') )
- /* End FIXME */
- p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
- p_sys->p_context->width = p_dec->fmt_in.video.i_width;
- p_sys->p_context->height = p_dec->fmt_in.video.i_height;
- p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
- /* ***** Get configuration of ffmpeg plugin ***** */
- p_sys->p_context->workaround_bugs =
- config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
- p_sys->p_context->error_resilience =
- config_GetInt( p_dec, "ffmpeg-error-resilience" );
- 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 LIBAVCODEC_BUILD >= 4698
- if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
- #endif
- var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- var_Get( p_dec, "ffmpeg-lowres", &val );
- #if LIBAVCODEC_BUILD >= 4723
- if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
- #endif
- /* ***** 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;
- /* ***** ffmpeg direct rendering ***** */
- p_sys->b_direct_rendering = 0;
- 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) &&
- ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) &&
- /* 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 &&
- !(p_sys->p_context->width % 16) && !(p_sys->p_context->height % 16) &&
- #if LIBAVCODEC_BUILD >= 4698
- !p_sys->p_context->debug_mv )
- #else
- 1 )
- #endif
- {
- /* 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 = 1;
- }
- #ifdef LIBAVCODEC_PP
- p_sys->p_pp = NULL;
- p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
- p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
- #endif
- /* ffmpeg doesn't properly release old pictures when frames are skipped */
- //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
- 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->release_buffer = ffmpeg_ReleaseFrameBuf;
- p_sys->p_context->opaque = p_dec;
- /* ***** init this codec with special data ***** */
- if( p_dec->fmt_in.i_extra )
- {
- int i_size = p_dec->fmt_in.i_extra;
- 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 );
- 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( &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( &psz[4], "SMI ", 4 ) )
- {
- memmove( &p[0x52], psz,
- &p[p_sys->p_context->extradata_size] - psz );
- break;
- }
- psz += i_size;
- }
- }
- }
- else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
- p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
- p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
- {
- if( p_dec->fmt_in.i_extra == 8 )
- {
- p_sys->p_context->extradata_size = 8;
- p_sys->p_context->extradata = malloc( 8 );
- memcpy( p_sys->p_context->extradata,
- p_dec->fmt_in.p_extra,
- p_dec->fmt_in.i_extra );
- p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
- msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
- p_sys->p_context->sub_id );
- }
- }
- /* FIXME: remove when ffmpeg deals properly with avc1 */
- else if( p_dec->fmt_in.i_codec == VLC_FOURCC('a','v','c','1') )
- {
- ;
- }
- /* End FIXME */
- else
- {
- p_sys->p_context->extradata_size = i_size;
- p_sys->p_context->extradata =
- malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
- 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 );
- }
- }
- /* ***** misc init ***** */
- p_sys->input_pts = p_sys->input_dts = 0;
- p_sys->i_pts = 0;
- p_sys->b_has_b_frames = VLC_FALSE;
- p_sys->b_first_frame = VLC_TRUE;
- 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 );
- /* Set output properties */
- p_dec->fmt_out.i_cat = VIDEO_ES;
- p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
- /* Setup palette */
- #if LIBAVCODEC_BUILD >= 4688
- if( p_dec->fmt_in.video.p_palette )
- p_sys->p_context->palctrl =
- (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
- else
- p_sys->p_context->palctrl = &palette_control;
- #endif
- /* ***** Open the codec ***** */
- vlc_mutex_lock( lockval.p_address );
- if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
- {
- vlc_mutex_unlock( lockval.p_address );
- msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
- free( p_sys );
- return VLC_EGENERIC;
- }
- vlc_mutex_unlock( lockval.p_address );
- msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DecodeVideo: Called to decode one or more frames
- *****************************************************************************/
- picture_t *E_(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 = VLC_FALSE;
- block_t *p_block;
- if( !pp_block || !*pp_block ) return NULL;
- p_block = *pp_block;
- if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
- {
- 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 );
- return NULL;
- }
- if( !p_dec->b_pace_control && p_sys->i_late_frames > 0 &&
- mdate() - p_sys->i_late_frames_start > I64C(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;
- }
- /* TODO implement it in a better way */
- /* 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 < 8 )
- {
- p_sys->p_context->hurry_up = 2;
- }
- 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
- {
- b_drawpicture = 1;
- p_sys->p_context->hurry_up = 0;
- }
- if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
- {
- p_sys->p_context->hurry_up = 5;
- b_null_size = VLC_TRUE;
- }
- /*
- * Do the actual decoding now
- */
- /* Check if post-processing was enabled */
- p_sys->b_pp = p_sys->b_pp_async;
- /* Don't forget that ffmpeg requires a little more bytes
- * that the real frame size */
- if( p_block->i_buffer > 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;
- p_dec->p_vlc->pf_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 )
- {
- 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->p_buffer, p_sys->i_buffer );
- if( b_null_size && p_sys->p_context->width > 0 &&
- p_sys->p_context->height > 0 )
- {
- /* Reparse it to not drop the I frame */
- b_null_size = VLC_FALSE;
- p_sys->p_context->hurry_up = 0;
- i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
- &b_gotpicture,
- p_sys->p_buffer, p_sys->i_buffer );
- }
- if( i_used < 0 )
- {
- 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;
- }
- /* Update frame late count*/
- if( p_sys->i_pts && p_sys->i_pts <= 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 */
- 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;
- }
- /* Set the PTS */
- if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
- /* 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 = VLC_TRUE;
- }
- /* Send decoded frame to vout */
- if( p_sys->i_pts )
- {
- p_pic->date = p_sys->i_pts;
- /* interpolate the next PTS */
- if( p_sys->p_context->frame_rate > 0 )
- {
- p_sys->i_pts += I64C(1000000) *
- (2 + p_sys->p_ff_pic->repeat_pict) *
- p_sys->p_context->frame_rate_base /
- (2 * p_sys->p_context->frame_rate);
- }
- if( p_sys->b_first_frame )
- {
- /* Hack to force display of still pictures */
- p_sys->b_first_frame = VLC_FALSE;
- p_pic->b_force = VLC_TRUE;
- }
- p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
- #if LIBAVCODEC_BUILD >= 4685
- 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;
- #endif
- return p_pic;
- }
- else
- {
- p_dec->pf_vout_buffer_del( p_dec, p_pic );
- }
- }
- block_Release( p_block );
- return NULL;
- }
- /*****************************************************************************
- * EndVideo: decoder destruction
- *****************************************************************************
- * This function is called when the thread ends after a sucessful
- * initialization.
- *****************************************************************************/
- void E_(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 );
- #ifdef LIBAVCODEC_PP
- E_(ClosePostproc)( p_dec, p_sys->p_pp );
- #endif
- free( p_sys->p_buffer_orig );
- }
- /*****************************************************************************
- * 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( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
- {
- int i_plane, i_size, i_line;
- uint8_t *p_dst, *p_src;
- int i_src_stride, i_dst_stride;
- #ifdef LIBAVCODEC_PP
- if( p_sys->p_pp && p_sys->b_pp )
- E_(PostprocPict)( p_dec, p_sys->p_pp, p_pic, p_ff_pic );
- else
- #endif
- 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++ )
- {
- p_dec->p_vlc->pf_memcpy( p_dst, p_src, i_size );
- p_src += i_src_stride;
- p_dst += i_dst_stride;
- }
- }
- }
- else
- {
- AVPicture dest_pic;
- int i;
- /* we need to convert to I420 */
- switch( p_sys->p_context->pix_fmt )
- {
- case PIX_FMT_YUV410P:
- case PIX_FMT_YUV411P:
- case PIX_FMT_PAL8:
- for( i = 0; i < p_pic->i_planes; i++ )
- {
- dest_pic.data[i] = p_pic->p[i].p_pixels;
- dest_pic.linesize[i] = p_pic->p[i].i_pitch;
- }
- img_convert( &dest_pic, PIX_FMT_YUV420P,
- (AVPicture *)p_ff_pic,
- p_sys->p_context->pix_fmt,
- p_sys->p_context->width,
- p_sys->p_context->height );
- break;
- default:
- msg_Err( p_dec, "don't know how to convert chroma %i",
- p_sys->p_context->pix_fmt );
- p_dec->b_error = 1;
- break;
- }
- }
- }
- /*****************************************************************************
- * 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 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 */
- 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_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;
- }
- p_ff_pic->opaque = 0;
- /* Not much to do in indirect rendering mode */
- if( !p_sys->b_direct_rendering || p_sys->b_pp )
- {
- return avcodec_default_get_buffer( p_context, p_ff_pic );
- }
- /* Some codecs set pix_fmt only after the 1st frame has been decoded,
- * so this check is necessary. */
- if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
- p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
- {
- msg_Dbg( p_dec, "disabling direct rendering" );
- p_sys->b_direct_rendering = 0;
- return avcodec_default_get_buffer( p_context, p_ff_pic );
- }
- /* 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 )
- {
- p_sys->b_direct_rendering = 0;
- 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;
- if( p_ff_pic->reference != 0 )
- {
- p_dec->pf_picture_link( 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 void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
- AVFrame *p_ff_pic )
- {
- decoder_t *p_dec = (decoder_t *)p_context->opaque;
- picture_t *p_pic;
- if( !p_ff_pic->opaque )
- {
- avcodec_default_release_buffer( p_context, p_ff_pic );
- return;
- }
- p_pic = (picture_t*)p_ff_pic->opaque;
- p_ff_pic->data[0] = NULL;
- p_ff_pic->data[1] = NULL;
- p_ff_pic->data[2] = NULL;
- p_ff_pic->data[3] = NULL;
- if( p_ff_pic->reference != 0 )
- {
- p_dec->pf_picture_unlink( p_dec, p_pic );
- }
- }