1 /*****************************************************************************
2 * lavf.c: x264 libavformat input module
3 *****************************************************************************
4 * Copyright (C) 2009 x264 project
6 * Authors: Mike Gurlitz <mike.gurlitz@gmail.com>
7 * Steven Walters <kemuri9@gmail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
22 *****************************************************************************/
25 #define FAIL_IF_ERROR( cond, ... ) FAIL_IF_ERR( cond, "lavf", __VA_ARGS__ )
26 #undef DECLARE_ALIGNED
27 #include <libavformat/avformat.h>
28 #include <libavutil/pixdesc.h>
32 AVFormatContext *lavf;
39 static int read_frame_internal( cli_pic_t *p_pic, lavf_hnd_t *h, int i_frame, video_info_t *info )
41 if( h->first_pic && !info )
43 /* see if the frame we are requesting is the frame we have already read and stored.
44 * if so, retrieve the pts and image data before freeing it. */
47 XCHG( cli_image_t, p_pic->img, h->first_pic->img );
48 p_pic->pts = h->first_pic->pts;
49 XCHG( void*, p_pic->opaque, h->first_pic->opaque );
51 lavf_input.release_frame( h->first_pic, NULL );
52 lavf_input.picture_clean( h->first_pic );
59 AVCodecContext *c = h->lavf->streams[h->stream_id]->codec;
60 AVPacket *pkt = p_pic->opaque;
62 avcodec_get_frame_defaults( &frame );
64 while( i_frame >= h->next_frame )
67 while( !finished && av_read_frame( h->lavf, pkt ) >= 0 )
68 if( pkt->stream_index == h->stream_id )
70 c->reordered_opaque = pkt->pts;
71 if( avcodec_decode_video2( c, &frame, &finished, pkt ) < 0 )
72 x264_cli_log( "lavf", X264_LOG_WARNING, "video decoding failed on frame %d\n", h->next_frame );
76 if( avcodec_decode_video2( c, &frame, &finished, pkt ) < 0 )
77 x264_cli_log( "lavf", X264_LOG_WARNING, "video decoding failed on frame %d\n", h->next_frame );
84 memcpy( p_pic->img.stride, frame.linesize, sizeof(p_pic->img.stride) );
85 memcpy( p_pic->img.plane, frame.data, sizeof(p_pic->img.plane) );
86 p_pic->img.height = c->height;
87 p_pic->img.csp = c->pix_fmt | X264_CSP_OTHER;
88 p_pic->img.width = c->width;
92 info->interlaced = frame.interlaced_frame;
93 info->tff = frame.top_field_first;
98 p_pic->pts = p_pic->duration = 0;
99 if( c->has_b_frames && frame.reordered_opaque != AV_NOPTS_VALUE )
100 p_pic->pts = frame.reordered_opaque;
101 else if( pkt->dts != AV_NOPTS_VALUE )
102 p_pic->pts = pkt->dts; // for AVI files
105 h->vfr_input = info->vfr = 0;
113 static int open_file( char *psz_filename, hnd_t *p_handle, video_info_t *info, cli_input_opt_t *opt )
115 lavf_hnd_t *h = calloc( 1, sizeof(lavf_hnd_t) );
119 if( !strcmp( psz_filename, "-" ) )
120 psz_filename = "pipe:";
122 /* if resolution was passed in, parse it and colorspace into parameters. this allows raw video support */
123 AVFormatParameters *param = NULL;
124 if( opt->resolution )
126 param = calloc( 1, sizeof(AVFormatParameters) );
129 sscanf( opt->resolution, "%dx%d", ¶m->width, ¶m->height );
130 param->pix_fmt = opt->colorspace ? av_get_pix_fmt( opt->colorspace ) : PIX_FMT_YUV420P;
133 FAIL_IF_ERROR( av_open_input_file( &h->lavf, psz_filename, NULL, 0, param ), "could not open input file\n" )
136 FAIL_IF_ERROR( av_find_stream_info( h->lavf ) < 0, "could not find input stream info\n" )
139 while( i < h->lavf->nb_streams && h->lavf->streams[i]->codec->codec_type != CODEC_TYPE_VIDEO )
141 FAIL_IF_ERROR( i == h->lavf->nb_streams, "could not find video stream\n" )
144 AVCodecContext *c = h->lavf->streams[i]->codec;
145 info->fps_num = h->lavf->streams[i]->r_frame_rate.num;
146 info->fps_den = h->lavf->streams[i]->r_frame_rate.den;
147 info->timebase_num = h->lavf->streams[i]->time_base.num;
148 info->timebase_den = h->lavf->streams[i]->time_base.den;
149 /* lavf is thread unsafe as calling av_read_frame invalidates previously read AVPackets */
150 info->thread_safe = 0;
151 h->vfr_input = info->vfr;
152 FAIL_IF_ERROR( avcodec_open( c, avcodec_find_decoder( c->codec_id ) ),
153 "could not find decoder for video stream\n" )
155 /* prefetch the first frame and set/confirm flags */
156 h->first_pic = malloc( sizeof(cli_pic_t) );
157 FAIL_IF_ERROR( !h->first_pic || lavf_input.picture_alloc( h->first_pic, X264_CSP_OTHER, info->width, info->height ),
159 else if( read_frame_internal( h->first_pic, h, 0, info ) )
162 info->width = c->width;
163 info->height = c->height;
164 info->csp = h->first_pic->img.csp;
165 info->num_frames = h->lavf->streams[i]->nb_frames;
166 info->sar_height = c->sample_aspect_ratio.den;
167 info->sar_width = c->sample_aspect_ratio.num;
169 /* avisynth stores rgb data vertically flipped. */
170 if( !strcasecmp( get_filename_extension( psz_filename ), "avs" ) &&
171 (c->pix_fmt == PIX_FMT_BGRA || c->pix_fmt == PIX_FMT_BGR24) )
172 info->csp |= X264_CSP_VFLIP;
179 static int picture_alloc( cli_pic_t *pic, int csp, int width, int height )
181 if( x264_cli_pic_alloc( pic, csp, width, height ) )
184 pic->opaque = malloc( sizeof(AVPacket) );
187 av_init_packet( pic->opaque );
191 static int read_frame( cli_pic_t *pic, hnd_t handle, int i_frame )
193 return read_frame_internal( pic, handle, i_frame, NULL );
196 static int release_frame( cli_pic_t *pic, hnd_t handle )
198 av_free_packet( pic->opaque );
199 av_init_packet( pic->opaque );
203 static void picture_clean( cli_pic_t *pic )
206 memset( pic, 0, sizeof(cli_pic_t) );
209 static int close_file( hnd_t handle )
211 lavf_hnd_t *h = handle;
212 avcodec_close( h->lavf->streams[h->stream_id]->codec );
213 av_close_input_file( h->lavf );
218 const cli_input_t lavf_input = { open_file, picture_alloc, read_frame, release_frame, picture_clean, close_file };