Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2010-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | #include <pjmedia/converter.h> |
| 20 | #include <pj/errno.h> |
| 21 | |
| 22 | #if PJMEDIA_HAS_LIBSWSCALE && PJMEDIA_HAS_LIBAVUTIL |
| 23 | |
| 24 | #include "ffmpeg_util.h" |
| 25 | #include <libswscale/swscale.h> |
| 26 | |
| 27 | static pj_status_t factory_create_converter(pjmedia_converter_factory *cf, |
| 28 | pj_pool_t *pool, |
| 29 | const pjmedia_conversion_param*prm, |
| 30 | pjmedia_converter **p_cv); |
| 31 | static void factory_destroy_factory(pjmedia_converter_factory *cf); |
| 32 | static pj_status_t libswscale_conv_convert(pjmedia_converter *converter, |
| 33 | pjmedia_frame *src_frame, |
| 34 | pjmedia_frame *dst_frame); |
| 35 | static void libswscale_conv_destroy(pjmedia_converter *converter); |
| 36 | |
| 37 | |
| 38 | struct fmt_info |
| 39 | { |
| 40 | const pjmedia_video_format_info *fmt_info; |
| 41 | pjmedia_video_apply_fmt_param apply_param; |
| 42 | }; |
| 43 | |
| 44 | struct ffmpeg_converter |
| 45 | { |
| 46 | pjmedia_converter base; |
| 47 | struct SwsContext *sws_ctx; |
| 48 | struct fmt_info src, |
| 49 | dst; |
| 50 | }; |
| 51 | |
| 52 | static pjmedia_converter_factory_op libswscale_factory_op = |
| 53 | { |
| 54 | &factory_create_converter, |
| 55 | &factory_destroy_factory |
| 56 | }; |
| 57 | |
| 58 | static pjmedia_converter_op liswscale_converter_op = |
| 59 | { |
| 60 | &libswscale_conv_convert, |
| 61 | &libswscale_conv_destroy |
| 62 | }; |
| 63 | |
| 64 | static pj_status_t factory_create_converter(pjmedia_converter_factory *cf, |
| 65 | pj_pool_t *pool, |
| 66 | const pjmedia_conversion_param *prm, |
| 67 | pjmedia_converter **p_cv) |
| 68 | { |
| 69 | enum PixelFormat srcFormat, dstFormat; |
| 70 | const pjmedia_video_format_detail *src_detail, *dst_detail; |
| 71 | const pjmedia_video_format_info *src_fmt_info, *dst_fmt_info; |
| 72 | struct SwsContext *sws_ctx; |
| 73 | struct ffmpeg_converter *fcv; |
| 74 | pj_status_t status; |
| 75 | |
| 76 | PJ_UNUSED_ARG(cf); |
| 77 | |
| 78 | /* Only supports video */ |
| 79 | if (prm->src.type != PJMEDIA_TYPE_VIDEO || |
| 80 | prm->dst.type != prm->src.type || |
| 81 | prm->src.detail_type != PJMEDIA_FORMAT_DETAIL_VIDEO || |
| 82 | prm->dst.detail_type != prm->src.detail_type) |
| 83 | { |
| 84 | return PJ_ENOTSUP; |
| 85 | } |
| 86 | |
| 87 | /* lookup source format info */ |
| 88 | src_fmt_info = pjmedia_get_video_format_info( |
| 89 | pjmedia_video_format_mgr_instance(), |
| 90 | prm->src.id); |
| 91 | if (!src_fmt_info) |
| 92 | return PJ_ENOTSUP; |
| 93 | |
| 94 | /* lookup destination format info */ |
| 95 | dst_fmt_info = pjmedia_get_video_format_info( |
| 96 | pjmedia_video_format_mgr_instance(), |
| 97 | prm->dst.id); |
| 98 | if (!dst_fmt_info) |
| 99 | return PJ_ENOTSUP; |
| 100 | |
| 101 | src_detail = pjmedia_format_get_video_format_detail(&prm->src, PJ_TRUE); |
| 102 | dst_detail = pjmedia_format_get_video_format_detail(&prm->dst, PJ_TRUE); |
| 103 | |
| 104 | status = pjmedia_format_id_to_PixelFormat(prm->src.id, &srcFormat); |
| 105 | if (status != PJ_SUCCESS) |
| 106 | return PJ_ENOTSUP; |
| 107 | |
| 108 | status = pjmedia_format_id_to_PixelFormat(prm->dst.id, &dstFormat); |
| 109 | if (status != PJ_SUCCESS) |
| 110 | return PJ_ENOTSUP; |
| 111 | |
| 112 | sws_ctx = sws_getContext(src_detail->size.w, src_detail->size.h, srcFormat, |
| 113 | dst_detail->size.w, dst_detail->size.h, dstFormat, |
| 114 | SWS_BICUBIC, |
| 115 | NULL, NULL, NULL); |
| 116 | if (sws_ctx == NULL) |
| 117 | return PJ_ENOTSUP; |
| 118 | |
| 119 | fcv = PJ_POOL_ZALLOC_T(pool, struct ffmpeg_converter); |
| 120 | fcv->base.op = &liswscale_converter_op; |
| 121 | fcv->sws_ctx = sws_ctx; |
| 122 | fcv->src.apply_param.size = src_detail->size; |
| 123 | fcv->src.fmt_info = src_fmt_info; |
| 124 | fcv->dst.apply_param.size = dst_detail->size; |
| 125 | fcv->dst.fmt_info = dst_fmt_info; |
| 126 | |
| 127 | *p_cv = &fcv->base; |
| 128 | |
| 129 | return PJ_SUCCESS; |
| 130 | } |
| 131 | |
| 132 | static void factory_destroy_factory(pjmedia_converter_factory *cf) |
| 133 | { |
| 134 | PJ_UNUSED_ARG(cf); |
| 135 | } |
| 136 | |
| 137 | static pj_status_t libswscale_conv_convert(pjmedia_converter *converter, |
| 138 | pjmedia_frame *src_frame, |
| 139 | pjmedia_frame *dst_frame) |
| 140 | { |
| 141 | struct ffmpeg_converter *fcv = (struct ffmpeg_converter*)converter; |
| 142 | struct fmt_info *src = &fcv->src, |
| 143 | *dst = &fcv->dst; |
| 144 | int h; |
| 145 | |
| 146 | src->apply_param.buffer = src_frame->buf; |
| 147 | (*src->fmt_info->apply_fmt)(src->fmt_info, &src->apply_param); |
| 148 | |
| 149 | dst->apply_param.buffer = dst_frame->buf; |
| 150 | (*dst->fmt_info->apply_fmt)(dst->fmt_info, &dst->apply_param); |
| 151 | |
| 152 | h = sws_scale(fcv->sws_ctx, |
| 153 | (const uint8_t* const *)src->apply_param.planes, |
| 154 | src->apply_param.strides, |
| 155 | 0, src->apply_param.size.h, |
| 156 | dst->apply_param.planes, dst->apply_param.strides); |
| 157 | |
| 158 | //sws_scale() return value can't be trusted? There are cases when |
| 159 | //sws_scale() returns zero but conversion seems to work okay. |
| 160 | //return h==(int)dst->apply_param.size.h ? PJ_SUCCESS : PJ_EUNKNOWN; |
| 161 | PJ_UNUSED_ARG(h); |
| 162 | |
| 163 | return PJ_SUCCESS; |
| 164 | } |
| 165 | |
| 166 | static void libswscale_conv_destroy(pjmedia_converter *converter) |
| 167 | { |
| 168 | struct ffmpeg_converter *fcv = (struct ffmpeg_converter*)converter; |
| 169 | if (fcv->sws_ctx) { |
| 170 | struct SwsContext *tmp = fcv->sws_ctx; |
| 171 | fcv->sws_ctx = NULL; |
| 172 | sws_freeContext(tmp); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | static pjmedia_converter_factory libswscale_factory = |
| 177 | { |
| 178 | NULL, NULL, /* list */ |
| 179 | "libswscale", /* name */ |
| 180 | PJMEDIA_CONVERTER_PRIORITY_NORMAL+1, /* priority */ |
| 181 | NULL /* op will be init-ed later */ |
| 182 | }; |
| 183 | |
| 184 | PJ_DEF(pj_status_t) |
| 185 | pjmedia_libswscale_converter_init(pjmedia_converter_mgr *mgr) |
| 186 | { |
| 187 | libswscale_factory.op = &libswscale_factory_op; |
| 188 | pjmedia_ffmpeg_add_ref(); |
| 189 | return pjmedia_converter_mgr_register_factory(mgr, &libswscale_factory); |
| 190 | } |
| 191 | |
| 192 | |
| 193 | PJ_DEF(pj_status_t) |
| 194 | pjmedia_libswscale_converter_shutdown(pjmedia_converter_mgr *mgr, |
| 195 | pj_pool_t *pool) |
| 196 | { |
| 197 | PJ_UNUSED_ARG(pool); |
| 198 | pjmedia_ffmpeg_dec_ref(); |
| 199 | return pjmedia_converter_mgr_unregister_factory(mgr, &libswscale_factory, |
| 200 | PJ_TRUE); |
| 201 | } |
| 202 | |
| 203 | #ifdef _MSC_VER |
| 204 | # pragma comment( lib, "avutil.lib") |
| 205 | # pragma comment( lib, "swscale.lib") |
| 206 | #endif |
| 207 | |
| 208 | #endif /* #if PJMEDIA_HAS_LIBSWSCALE && PJMEDIA_HAS_LIBAVUTIL */ |