vpx/src/vpx_encoder.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 /*!\file
  13  * \brief Provides the high level interface to wrap encoder algorithms.
  14  *
  15  */
  16 #include <limits.h>
  17 #include <string.h>
  18 #include "vpx/internal/vpx_codec_internal.h"
  19 #include "vpx_config.h"
  20
  21 #define SAVE_STATUS(ctx,var) (ctx?(ctx->err = var):var)
  22
  23 vpx_codec_err_t vpx_codec_enc_init_ver(vpx_codec_ctx_t      *ctx,
  24                                        vpx_codec_iface_t    *iface,
  25                                        vpx_codec_enc_cfg_t  *cfg,
  26                                        vpx_codec_flags_t     flags,
  27                                        int                   ver)
  28 {
  29     vpx_codec_err_t res;
  30
  31     if (ver != VPX_ENCODER_ABI_VERSION)
  32         res = VPX_CODEC_ABI_MISMATCH;
  33     else if (!ctx || !iface || !cfg)
  34         res = VPX_CODEC_INVALID_PARAM;
  35     else if (iface->abi_version != VPX_CODEC_INTERNAL_ABI_VERSION)
  36         res = VPX_CODEC_ABI_MISMATCH;
  37     else if (!(iface->caps & VPX_CODEC_CAP_ENCODER))
  38         res = VPX_CODEC_INCAPABLE;
  39     else if ((flags & VPX_CODEC_USE_XMA) && !(iface->caps & VPX_CODEC_CAP_XMA))
  40         res = VPX_CODEC_INCAPABLE;
  41     else if ((flags & VPX_CODEC_USE_PSNR)
  42              && !(iface->caps & VPX_CODEC_CAP_PSNR))
  43         res = VPX_CODEC_INCAPABLE;
  44     else if ((flags & VPX_CODEC_USE_OUTPUT_PARTITION)
  45              && !(iface->caps & VPX_CODEC_CAP_OUTPUT_PARTITION))
  46         res = VPX_CODEC_INCAPABLE;
  47     else
  48     {
  49         ctx->iface = iface;
  50         ctx->name = iface->name;
  51         ctx->priv = NULL;
  52         ctx->init_flags = flags;
  53         ctx->config.enc = cfg;
  54         res = ctx->iface->init(ctx);
  55
  56         if (res)
  57         {
  58             ctx->err_detail = ctx->priv ? ctx->priv->err_detail : NULL;
  59             vpx_codec_destroy(ctx);
  60         }
  61
  62         if (ctx->priv)
  63             ctx->priv->iface = ctx->iface;
  64     }
  65
  66     return SAVE_STATUS(ctx, res);
  67 }
  68
  69
  70
  71 vpx_codec_err_t  vpx_codec_enc_config_default(vpx_codec_iface_t    *iface,
  72         vpx_codec_enc_cfg_t  *cfg,
  73         unsigned int          usage)
  74 {
  75     vpx_codec_err_t res;
  76     vpx_codec_enc_cfg_map_t *map;
  77
  78     if (!iface || !cfg || usage > INT_MAX)
  79         res = VPX_CODEC_INVALID_PARAM;
  80     else if (!(iface->caps & VPX_CODEC_CAP_ENCODER))
  81         res = VPX_CODEC_INCAPABLE;
  82     else
  83     {
  84         res = VPX_CODEC_INVALID_PARAM;
  85
  86         for (map = iface->enc.cfg_maps; map->usage >= 0; map++)
  87         {
  88             if (map->usage == (int)usage)
  89             {
  90                 *cfg = map->cfg;
  91                 cfg->g_usage = usage;
  92                 res = VPX_CODEC_OK;
  93                 break;
  94             }
  95         }
  96     }
  97
  98     return res;
  99 }
 100
 101
 102 #if ARCH_X86 || ARCH_X86_64
 103 /* On X86, disable the x87 unit's internal 80 bit precision for better
 104  * consistency with the SSE unit's 64 bit precision.
 105  */
 106 #include "vpx_ports/x86.h"
 107 #define FLOATING_POINT_INIT() do {\
 108         unsigned short x87_orig_mode = x87_set_double_precision();
 109 #define FLOATING_POINT_RESTORE() \
 110     x87_set_control_word(x87_orig_mode); }while(0)
 111
 112
 113 #else
 114 static void FLOATING_POINT_INIT() {}
 115 static void FLOATING_POINT_RESTORE() {}
 116 #endif
 117
 118
 119 vpx_codec_err_t  vpx_codec_encode(vpx_codec_ctx_t            *ctx,
 120                                   const vpx_image_t          *img,
 121                                   vpx_codec_pts_t             pts,
 122                                   unsigned long               duration,
 123                                   vpx_enc_frame_flags_t       flags,
 124                                   unsigned long               deadline)
 125 {
 126     vpx_codec_err_t res;
 127
 128     if (!ctx || (img && !duration))
 129         res = VPX_CODEC_INVALID_PARAM;
 130     else if (!ctx->iface || !ctx->priv)
 131         res = VPX_CODEC_ERROR;
 132     else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
 133         res = VPX_CODEC_INCAPABLE;
 134     else
 135     {
 136         /* Execute in a normalized floating point environment, if the platform
 137          * requires it.
 138          */
 139         FLOATING_POINT_INIT();
 140         res = ctx->iface->enc.encode(ctx->priv->alg_priv, img, pts,
 141                                      duration, flags, deadline);
 142         FLOATING_POINT_RESTORE();
 143     }
 144
 145     return SAVE_STATUS(ctx, res);
 146 }
 147
 148
 149 const vpx_codec_cx_pkt_t *vpx_codec_get_cx_data(vpx_codec_ctx_t   *ctx,
 150         vpx_codec_iter_t  *iter)
 151 {
 152     const vpx_codec_cx_pkt_t *pkt = NULL;
 153
 154     if (ctx)
 155     {
 156         if (!iter)
 157             ctx->err = VPX_CODEC_INVALID_PARAM;
 158         else if (!ctx->iface || !ctx->priv)
 159             ctx->err = VPX_CODEC_ERROR;
 160         else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
 161             ctx->err = VPX_CODEC_INCAPABLE;
 162         else
 163             pkt = ctx->iface->enc.get_cx_data(ctx->priv->alg_priv, iter);
 164     }
 165
 166     if (pkt && pkt->kind == VPX_CODEC_CX_FRAME_PKT)
 167     {
 168         /* If the application has specified a destination area for the
 169          * compressed data, and the codec has not placed the data there,
 170          * and it fits, copy it.
 171          */
 172         char *dst_buf = ctx->priv->enc.cx_data_dst_buf.buf;
 173
 174         if (dst_buf
 175             && pkt->data.raw.buf != dst_buf
 176             && pkt->data.raw.sz
 177             + ctx->priv->enc.cx_data_pad_before
 178             + ctx->priv->enc.cx_data_pad_after
 179             <= ctx->priv->enc.cx_data_dst_buf.sz)
 180         {
 181             vpx_codec_cx_pkt_t *modified_pkt = &ctx->priv->enc.cx_data_pkt;
 182
 183             memcpy(dst_buf + ctx->priv->enc.cx_data_pad_before,
 184                    pkt->data.raw.buf, pkt->data.raw.sz);
 185             *modified_pkt = *pkt;
 186             modified_pkt->data.raw.buf = dst_buf;
 187             modified_pkt->data.raw.sz += ctx->priv->enc.cx_data_pad_before
 188                                          + ctx->priv->enc.cx_data_pad_after;
 189             pkt = modified_pkt;
 190         }
 191
 192         if (dst_buf == pkt->data.raw.buf)
 193         {
 194             ctx->priv->enc.cx_data_dst_buf.buf = dst_buf + pkt->data.raw.sz;
 195             ctx->priv->enc.cx_data_dst_buf.sz -= pkt->data.raw.sz;
 196         }
 197     }
 198
 199     return pkt;
 200 }
 201
 202
 203 vpx_codec_err_t vpx_codec_set_cx_data_buf(vpx_codec_ctx_t       *ctx,
 204         const vpx_fixed_buf_t *buf,
 205         unsigned int           pad_before,
 206         unsigned int           pad_after)
 207 {
 208     if (!ctx || !ctx->priv)
 209         return VPX_CODEC_INVALID_PARAM;
 210
 211     if (buf)
 212     {
 213         ctx->priv->enc.cx_data_dst_buf = *buf;
 214         ctx->priv->enc.cx_data_pad_before = pad_before;
 215         ctx->priv->enc.cx_data_pad_after = pad_after;
 216     }
 217     else
 218     {
 219         ctx->priv->enc.cx_data_dst_buf.buf = NULL;
 220         ctx->priv->enc.cx_data_dst_buf.sz = 0;
 221         ctx->priv->enc.cx_data_pad_before = 0;
 222         ctx->priv->enc.cx_data_pad_after = 0;
 223     }
 224
 225     return VPX_CODEC_OK;
 226 }
 227
 228
 229 const vpx_image_t *vpx_codec_get_preview_frame(vpx_codec_ctx_t   *ctx)
 230 {
 231     vpx_image_t *img = NULL;
 232
 233     if (ctx)
 234     {
 235         if (!ctx->iface || !ctx->priv)
 236             ctx->err = VPX_CODEC_ERROR;
 237         else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
 238             ctx->err = VPX_CODEC_INCAPABLE;
 239         else if (!ctx->iface->enc.get_preview)
 240             ctx->err = VPX_CODEC_INCAPABLE;
 241         else
 242             img = ctx->iface->enc.get_preview(ctx->priv->alg_priv);
 243     }
 244
 245     return img;
 246 }
 247
 248
 249 vpx_fixed_buf_t *vpx_codec_get_global_headers(vpx_codec_ctx_t   *ctx)
 250 {
 251     vpx_fixed_buf_t *buf = NULL;
 252
 253     if (ctx)
 254     {
 255         if (!ctx->iface || !ctx->priv)
 256             ctx->err = VPX_CODEC_ERROR;
 257         else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
 258             ctx->err = VPX_CODEC_INCAPABLE;
 259         else if (!ctx->iface->enc.get_glob_hdrs)
 260             ctx->err = VPX_CODEC_INCAPABLE;
 261         else
 262             buf = ctx->iface->enc.get_glob_hdrs(ctx->priv->alg_priv);
 263     }
 264
 265     return buf;
 266 }
 267
 268
 269 vpx_codec_err_t  vpx_codec_enc_config_set(vpx_codec_ctx_t            *ctx,
 270         const vpx_codec_enc_cfg_t  *cfg)
 271 {
 272     vpx_codec_err_t res;
 273
 274     if (!ctx || !ctx->iface || !ctx->priv || !cfg)
 275         res = VPX_CODEC_INVALID_PARAM;
 276     else if (!(ctx->iface->caps & VPX_CODEC_CAP_ENCODER))
 277         res = VPX_CODEC_INCAPABLE;
 278     else
 279         res = ctx->iface->enc.cfg_set(ctx->priv->alg_priv, cfg);
 280
 281     return SAVE_STATUS(ctx, res);
 282 }
 283
 284
 285 int vpx_codec_pkt_list_add(struct vpx_codec_pkt_list *list,
 286                            const struct vpx_codec_cx_pkt *pkt)
 287 {
 288     if (list->cnt < list->max)
 289     {
 290         list->pkts[list->cnt++] = *pkt;
 291         return 0;
 292     }
 293
 294     return 1;
 295 }
 296
 297
 298 const vpx_codec_cx_pkt_t *vpx_codec_pkt_list_get(struct vpx_codec_pkt_list *list,
 299         vpx_codec_iter_t           *iter)
 300 {
 301     const vpx_codec_cx_pkt_t *pkt;
 302
 303     if (!(*iter))
 304     {
 305         *iter = list->pkts;
 306     }
 307
 308     pkt = (const void *) * iter;
 309
 310     if ((size_t)(pkt - list->pkts) < list->cnt)
 311         *iter = pkt + 1;
 312     else
 313         pkt = NULL;
 314
 315     return pkt;
 316 }