| 1 | /* |
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| 2 | mediastreamer2 library - modular sound and video processing and streaming |
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| 3 | Copyright (C) 2006 Simon MORLAT (simon.morlat@linphone.org) |
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| 4 | |
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| 5 | This program is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU General Public License |
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| 7 | as published by the Free Software Foundation; either version 2 |
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| 8 | of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 18 | */ |
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| 19 | |
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| 20 | #ifdef HAVE_CONFIG_H |
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| 21 | #include "mediastreamer-config.h" |
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| 22 | #endif |
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| 23 | |
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| 24 | #include "ffmpeg-priv.h" |
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| 25 | |
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| 26 | #include "mediastreamer2/msfilter.h" |
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| 27 | #include "mediastreamer2/msvideo.h" |
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| 28 | #include "rfc2429.h" |
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| 29 | |
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| 30 | |
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| 31 | extern void ms_ffmpeg_check_init(); |
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| 32 | |
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| 33 | typedef struct DecState{ |
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| 34 | AVCodecContext av_context; |
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| 35 | AVCodec *av_codec; |
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| 36 | enum CodecID codec; |
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| 37 | mblk_t *input; |
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| 38 | YuvBuf outbuf; |
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| 39 | mblk_t *yuv_msg; |
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| 40 | struct SwsContext *sws_ctx; |
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| 41 | int output_pix_fmt; |
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| 42 | uint8_t dci[512]; |
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| 43 | int dci_size; |
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| 44 | bool_t snow_initialized; |
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| 45 | }DecState; |
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| 46 | |
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| 47 | |
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| 48 | static void dec_init(MSFilter *f, enum CodecID cid){ |
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| 49 | DecState *s=(DecState *)ms_new0(DecState,1); |
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| 50 | ms_ffmpeg_check_init(); |
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| 51 | |
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| 52 | avcodec_get_context_defaults(&s->av_context); |
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| 53 | s->av_codec=NULL; |
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| 54 | s->codec=cid; |
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| 55 | s->input=NULL; |
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| 56 | s->yuv_msg=NULL; |
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| 57 | s->output_pix_fmt=PIX_FMT_YUV420P; |
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| 58 | s->snow_initialized=FALSE; |
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| 59 | s->outbuf.w=0; |
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| 60 | s->outbuf.h=0; |
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| 61 | s->sws_ctx=NULL; |
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| 62 | f->data=s; |
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| 63 | |
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| 64 | s->av_codec=avcodec_find_decoder(s->codec); |
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| 65 | if (s->av_codec==NULL){ |
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| 66 | ms_error("Could not find decoder %i!",s->codec); |
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| 67 | } |
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| 68 | /* |
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| 69 | s->av_context.width=MS_VIDEO_SIZE_QCIF_W; |
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| 70 | s->av_context.height=MS_VIDEO_SIZE_QCIF_H; |
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| 71 | */ |
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| 72 | } |
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| 73 | |
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| 74 | static void dec_h263_init(MSFilter *f){ |
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| 75 | dec_init(f,CODEC_ID_H263); |
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| 76 | } |
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| 77 | |
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| 78 | static void dec_mpeg4_init(MSFilter *f){ |
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| 79 | dec_init(f,CODEC_ID_MPEG4); |
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| 80 | } |
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| 81 | |
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| 82 | static void dec_mjpeg_init(MSFilter *f){ |
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| 83 | dec_init(f,CODEC_ID_MJPEG); |
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| 84 | } |
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| 85 | |
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| 86 | static void dec_snow_init(MSFilter *f){ |
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| 87 | dec_init(f,CODEC_ID_SNOW); |
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| 88 | } |
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| 89 | |
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| 90 | static void dec_uninit(MSFilter *f){ |
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| 91 | DecState *s=(DecState*)f->data; |
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| 92 | if (s->input!=NULL) freemsg(s->input); |
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| 93 | if (s->yuv_msg!=NULL) freemsg(s->yuv_msg); |
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| 94 | if (s->sws_ctx!=NULL){ |
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| 95 | sws_freeContext(s->sws_ctx); |
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| 96 | s->sws_ctx=NULL; |
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| 97 | } |
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| 98 | ms_free(s); |
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| 99 | } |
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| 100 | |
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| 101 | static int dec_add_fmtp(MSFilter *f, void *data){ |
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| 102 | const char *fmtp=(const char*)data; |
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| 103 | DecState *s=(DecState*)f->data; |
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| 104 | char config[512]; |
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| 105 | if (fmtp_get_value(fmtp,"config",config,sizeof(config))){ |
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| 106 | /*convert hexa decimal config string into a bitstream */ |
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| 107 | int i,j,max=strlen(config); |
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| 108 | char octet[3]; |
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| 109 | octet[2]=0; |
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| 110 | for(i=0,j=0;i<max;i+=2,++j){ |
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| 111 | octet[0]=config[i]; |
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| 112 | octet[1]=config[i+1]; |
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| 113 | s->dci[j]=strtol(octet,NULL,16); |
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| 114 | } |
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| 115 | s->dci_size=j; |
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| 116 | ms_message("Got mpeg4 config string: %s",config); |
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| 117 | } |
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| 118 | return 0; |
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| 119 | } |
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| 120 | |
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| 121 | static void dec_preprocess(MSFilter *f){ |
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| 122 | DecState *s=(DecState*)f->data; |
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| 123 | int error; |
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| 124 | /* we must know picture size before initializing snow decoder*/ |
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| 125 | if (s->codec!=CODEC_ID_SNOW){ |
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| 126 | error=avcodec_open(&s->av_context, s->av_codec); |
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| 127 | if (error!=0) ms_error("avcodec_open() failed: %i",error); |
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| 128 | if (s->codec==CODEC_ID_MPEG4 && s->dci_size>0){ |
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| 129 | s->av_context.extradata=s->dci; |
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| 130 | s->av_context.extradata_size=s->dci_size; |
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| 131 | } |
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| 132 | } |
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| 133 | } |
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| 134 | |
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| 135 | static void dec_postprocess(MSFilter *f){ |
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| 136 | DecState *s=(DecState*)f->data; |
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| 137 | if (s->av_context.codec!=NULL){ |
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| 138 | avcodec_close(&s->av_context); |
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| 139 | s->av_context.codec=NULL; |
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| 140 | } |
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| 141 | } |
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| 142 | |
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| 143 | static mblk_t * skip_rfc2190_header(mblk_t *inm){ |
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| 144 | if (msgdsize(inm) >= 4) { |
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| 145 | uint8_t *ph = inm->b_rptr; |
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| 146 | int F = (ph[0]>>7) & 0x1; |
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| 147 | int P = (ph[0]>>6) & 0x1; |
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| 148 | if (F == 0) inm->b_rptr += 4; // mode A |
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| 149 | else if (P == 0) inm->b_rptr += 8; // mode B |
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| 150 | else inm->b_rptr += 12; // mode C |
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| 151 | } else { |
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| 152 | freemsg(inm); |
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| 153 | inm=NULL; |
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| 154 | } |
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| 155 | return inm; |
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| 156 | } |
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| 157 | |
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| 158 | static mblk_t * skip_rfc2429_header(mblk_t *inm){ |
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| 159 | if (msgdsize(inm) >= 2){ |
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| 160 | uint32_t *p = (uint32_t*)inm->b_rptr; |
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| 161 | uint8_t *ph=inm->b_rptr; |
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| 162 | int PLEN; |
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| 163 | int gob_num; |
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| 164 | bool_t P; |
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| 165 | |
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| 166 | P=rfc2429_get_P(ph); |
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| 167 | PLEN=rfc2429_get_PLEN(ph); |
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| 168 | /*printf("receiving new packet; P=%i; V=%i; PLEN=%i; PEBIT=%i\n",P,rfc2429_get_V(ph),PLEN,rfc2429_get_PEBIT(ph)); |
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| 169 | */ |
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| 170 | gob_num = (ntohl(*p) >> 10) & 0x1f; |
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| 171 | /*ms_message("gob %i, size %i", gob_num, msgdsize(inm)); |
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| 172 | ms_message("ms_AVdecoder_process: received %08x %08x", ntohl(p[0]), ntohl(p[1]));*/ |
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| 173 | |
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| 174 | /* remove H.263 Payload Header */ |
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| 175 | if (PLEN>0){ |
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| 176 | /* we ignore the redundant picture header and |
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| 177 | directly go to the bitstream */ |
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| 178 | inm->b_rptr+=PLEN; |
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| 179 | } |
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| 180 | if (P){ |
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| 181 | inm->b_rptr[0]=inm->b_rptr[1]=0; |
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| 182 | }else{ |
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| 183 | /* no PSC omitted */ |
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| 184 | inm->b_rptr+=2; |
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| 185 | } |
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| 186 | return inm; |
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| 187 | }else freemsg(inm); |
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| 188 | return NULL; |
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| 189 | } |
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| 190 | |
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| 191 | static mblk_t * parse_snow_header(DecState *s,mblk_t *inm){ |
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| 192 | if (msgdsize(inm) >= 4){ |
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| 193 | uint32_t h = ntohl(*(uint32_t*)inm->b_rptr); |
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| 194 | if (!s->snow_initialized){ |
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| 195 | int error; |
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| 196 | s->av_context.width=h>>16; |
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| 197 | s->av_context.height=h&0xffff; |
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| 198 | error=avcodec_open(&s->av_context, s->av_codec); |
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| 199 | if (error!=0) ms_error("avcodec_open() failed for snow: %i",error); |
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| 200 | else { |
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| 201 | s->snow_initialized=TRUE; |
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| 202 | ms_message("Snow decoder initialized,size=%ix%i", |
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| 203 | s->av_context.width, |
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| 204 | s->av_context.height); |
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| 205 | } |
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| 206 | } |
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| 207 | inm->b_rptr+=4; |
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| 208 | return inm; |
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| 209 | }else { |
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| 210 | freemsg(inm); |
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| 211 | return NULL; |
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| 212 | } |
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| 213 | } |
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| 214 | |
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| 215 | static mblk_t *get_as_yuvmsg(MSFilter *f, DecState *s, AVFrame *orig){ |
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| 216 | AVCodecContext *ctx=&s->av_context; |
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| 217 | |
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| 218 | if (s->outbuf.w!=ctx->width || s->outbuf.h!=ctx->height){ |
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| 219 | if (s->sws_ctx!=NULL){ |
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| 220 | sws_freeContext(s->sws_ctx); |
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| 221 | s->sws_ctx=NULL; |
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| 222 | } |
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| 223 | s->yuv_msg=yuv_buf_alloc(&s->outbuf,ctx->width,ctx->height); |
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| 224 | s->outbuf.w=ctx->width; |
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| 225 | s->outbuf.h=ctx->height; |
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| 226 | s->sws_ctx=sws_getContext(ctx->width,ctx->height,ctx->pix_fmt, |
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| 227 | ctx->width,ctx->height,s->output_pix_fmt,SWS_FAST_BILINEAR, |
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| 228 | NULL, NULL, NULL); |
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| 229 | } |
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| 230 | if (sws_scale(s->sws_ctx,orig->data,orig->linesize, 0, |
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| 231 | ctx->height, s->outbuf.planes, s->outbuf.strides)<0){ |
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| 232 | ms_error("%s: error in sws_scale().",f->desc->name); |
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| 233 | } |
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| 234 | return dupmsg(s->yuv_msg); |
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| 235 | } |
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| 236 | |
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| 237 | static void dec_process_frame(MSFilter *f, mblk_t *inm){ |
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| 238 | DecState *s=(DecState*)f->data; |
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| 239 | AVFrame orig; |
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| 240 | int got_picture; |
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| 241 | /* get a picture from the input queue */ |
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| 242 | |
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| 243 | if (f->desc->id==MS_H263_DEC_ID) inm=skip_rfc2429_header(inm); |
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| 244 | else if (f->desc->id==MS_H263_OLD_DEC_ID) inm=skip_rfc2190_header(inm); |
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| 245 | else if (s->codec==CODEC_ID_SNOW && s->input==NULL) inm=parse_snow_header(s,inm); |
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| 246 | if (inm){ |
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| 247 | /* accumulate the video packet until we have the rtp markbit*/ |
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| 248 | if (s->input==NULL){ |
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| 249 | s->input=inm; |
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| 250 | }else{ |
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| 251 | concatb(s->input,inm); |
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| 252 | } |
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| 253 | |
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| 254 | if (mblk_get_marker_info(inm)){ |
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| 255 | mblk_t *frame; |
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| 256 | int remain,len; |
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| 257 | /*ms_message("got marker bit !");*/ |
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| 258 | /*append some padding bytes for ffmpeg to safely |
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| 259 | read extra bytes...*/ |
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| 260 | msgpullup(s->input,msgdsize(s->input)+8); |
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| 261 | frame=s->input; |
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| 262 | s->input=NULL; |
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| 263 | while ( (remain=frame->b_wptr-frame->b_rptr)> 0) { |
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| 264 | len=avcodec_decode_video(&s->av_context,&orig,&got_picture,(uint8_t*)frame->b_rptr,remain ); |
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| 265 | if (len<=0) { |
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| 266 | ms_warning("ms_AVdecoder_process: error %i.",len); |
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| 267 | break; |
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| 268 | } |
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| 269 | if (got_picture) { |
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| 270 | ms_queue_put(f->outputs[0],get_as_yuvmsg(f,s,&orig)); |
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| 271 | } |
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| 272 | frame->b_rptr+=len; |
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| 273 | } |
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| 274 | freemsg(frame); |
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| 275 | } |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | static void dec_process(MSFilter *f){ |
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| 280 | mblk_t *inm; |
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| 281 | while((inm=ms_queue_get(f->inputs[0]))!=0){ |
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| 282 | dec_process_frame(f,inm); |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | |
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| 287 | static MSFilterMethod methods[]={ |
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| 288 | { MS_FILTER_ADD_FMTP , dec_add_fmtp }, |
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| 289 | { 0 , NULL } |
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| 290 | }; |
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| 291 | |
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| 292 | #ifdef _MSC_VER |
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| 293 | |
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| 294 | MSFilterDesc ms_h263_dec_desc={ |
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| 295 | MS_H263_DEC_ID, |
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| 296 | "MSH263Dec", |
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| 297 | "A H.263 decoder using ffmpeg library", |
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| 298 | MS_FILTER_DECODER, |
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| 299 | "H263-1998", |
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| 300 | 1, |
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| 301 | 1, |
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| 302 | dec_h263_init, |
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| 303 | dec_preprocess, |
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| 304 | dec_process, |
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| 305 | dec_postprocess, |
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| 306 | dec_uninit, |
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| 307 | methods |
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| 308 | }; |
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| 309 | |
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| 310 | MSFilterDesc ms_h263_old_dec_desc={ |
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| 311 | MS_H263_DEC_ID, |
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| 312 | "MSH263OldDec", |
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| 313 | "A H.263 decoder using ffmpeg library", |
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| 314 | MS_FILTER_DECODER, |
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| 315 | "H263", |
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| 316 | 1, |
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| 317 | 1, |
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| 318 | dec_h263_init, |
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| 319 | dec_preprocess, |
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| 320 | dec_process, |
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| 321 | dec_postprocess, |
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| 322 | dec_uninit, |
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| 323 | methods |
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| 324 | }; |
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| 325 | |
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| 326 | |
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| 327 | MSFilterDesc ms_mpeg4_dec_desc={ |
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| 328 | MS_MPEG4_DEC_ID, |
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| 329 | "MSMpeg4Dec", |
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| 330 | "A MPEG4 decoder using ffmpeg library", |
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| 331 | MS_FILTER_DECODER, |
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| 332 | "MP4V-ES", |
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| 333 | 1, |
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| 334 | 1, |
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| 335 | dec_mpeg4_init, |
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| 336 | dec_preprocess, |
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| 337 | dec_process, |
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| 338 | dec_postprocess, |
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| 339 | dec_uninit, |
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| 340 | methods |
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| 341 | }; |
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| 342 | |
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| 343 | MSFilterDesc ms_mjpeg_dec_desc={ |
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| 344 | MS_MJPEG_DEC_ID, |
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| 345 | "MSMJpegDec", |
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| 346 | "A MJPEG decoder using ffmpeg library", |
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| 347 | MS_FILTER_DECODER, |
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| 348 | "MJPEG", |
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| 349 | 1, |
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| 350 | 1, |
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| 351 | dec_mjpeg_init, |
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| 352 | dec_preprocess, |
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| 353 | dec_process, |
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| 354 | dec_postprocess, |
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| 355 | dec_uninit, |
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| 356 | methods |
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| 357 | }; |
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| 358 | |
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| 359 | MSFilterDesc ms_snow_dec_desc={ |
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| 360 | MS_SNOW_DEC_ID, |
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| 361 | "MSSnowDec", |
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| 362 | "A snow decoder using ffmpeg library", |
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| 363 | MS_FILTER_DECODER, |
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| 364 | "snow", |
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| 365 | 1, |
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| 366 | 1, |
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| 367 | dec_snow_init, |
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| 368 | dec_preprocess, |
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| 369 | dec_process, |
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| 370 | dec_postprocess, |
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| 371 | dec_uninit, |
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| 372 | methods |
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| 373 | }; |
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| 374 | |
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| 375 | #else |
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| 376 | |
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| 377 | MSFilterDesc ms_h263_dec_desc={ |
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| 378 | .id=MS_H263_DEC_ID, |
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| 379 | .name="MSH263Dec", |
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| 380 | .text="A H.263 decoder using ffmpeg library", |
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| 381 | .category=MS_FILTER_DECODER, |
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| 382 | .enc_fmt="H263-1998", |
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| 383 | .ninputs=1, |
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| 384 | .noutputs=1, |
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| 385 | .init=dec_h263_init, |
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| 386 | .preprocess=dec_preprocess, |
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| 387 | .process=dec_process, |
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| 388 | .postprocess=dec_postprocess, |
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| 389 | .uninit=dec_uninit, |
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| 390 | .methods= methods |
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| 391 | }; |
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| 392 | |
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| 393 | MSFilterDesc ms_h263_old_dec_desc={ |
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| 394 | .id=MS_H263_OLD_DEC_ID, |
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| 395 | .name="MSH263OldDec", |
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| 396 | .text="A H.263 decoder using ffmpeg library", |
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| 397 | .category=MS_FILTER_DECODER, |
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| 398 | .enc_fmt="H263", |
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| 399 | .ninputs=1, |
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| 400 | .noutputs=1, |
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| 401 | .init=dec_h263_init, |
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| 402 | .preprocess=dec_preprocess, |
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| 403 | .process=dec_process, |
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| 404 | .postprocess=dec_postprocess, |
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| 405 | .uninit=dec_uninit, |
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| 406 | .methods= methods |
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| 407 | }; |
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| 408 | |
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| 409 | |
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| 410 | MSFilterDesc ms_mpeg4_dec_desc={ |
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| 411 | .id=MS_MPEG4_DEC_ID, |
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| 412 | .name="MSMpeg4Dec", |
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| 413 | .text="A MPEG4 decoder using ffmpeg library", |
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| 414 | .category=MS_FILTER_DECODER, |
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| 415 | .enc_fmt="MP4V-ES", |
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| 416 | .ninputs=1, |
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| 417 | .noutputs=1, |
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| 418 | .init=dec_mpeg4_init, |
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| 419 | .preprocess=dec_preprocess, |
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| 420 | .process=dec_process, |
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| 421 | .postprocess=dec_postprocess, |
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| 422 | .uninit=dec_uninit, |
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| 423 | .methods= methods |
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| 424 | }; |
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| 425 | |
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| 426 | MSFilterDesc ms_mjpeg_dec_desc={ |
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| 427 | .id=MS_MJPEG_DEC_ID, |
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| 428 | .name="MSMJpegDec", |
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| 429 | .text="A MJEPG decoder using ffmpeg library", |
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| 430 | .category=MS_FILTER_DECODER, |
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| 431 | .enc_fmt="MJPEG", |
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| 432 | .ninputs=1, |
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| 433 | .noutputs=1, |
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| 434 | .init=dec_mjpeg_init, |
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| 435 | .preprocess=dec_preprocess, |
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| 436 | .process=dec_process, |
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| 437 | .postprocess=dec_postprocess, |
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| 438 | .uninit=dec_uninit, |
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| 439 | .methods= methods |
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| 440 | }; |
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| 441 | |
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| 442 | MSFilterDesc ms_snow_dec_desc={ |
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| 443 | .id=MS_SNOW_DEC_ID, |
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| 444 | .name="MSSnowDec", |
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| 445 | .text="A snow decoder using ffmpeg library", |
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| 446 | .category=MS_FILTER_DECODER, |
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| 447 | .enc_fmt="x-snow", |
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| 448 | .ninputs=1, |
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| 449 | .noutputs=1, |
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| 450 | .init=dec_snow_init, |
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| 451 | .preprocess=dec_preprocess, |
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| 452 | .process=dec_process, |
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| 453 | .postprocess=dec_postprocess, |
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| 454 | .uninit=dec_uninit, |
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| 455 | .methods= methods |
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| 456 | }; |
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| 457 | |
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| 458 | #endif |
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| 459 | |
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| 460 | MS_FILTER_DESC_EXPORT(ms_mpeg4_dec_desc) |
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| 461 | MS_FILTER_DESC_EXPORT(ms_h263_dec_desc) |
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| 462 | MS_FILTER_DESC_EXPORT(ms_h263_old_dec_desc) |
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| 463 | MS_FILTER_DESC_EXPORT(ms_mjpeg_dec_desc) |
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| 464 | MS_FILTER_DESC_EXPORT(ms_snow_dec_desc) |
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