libavcodec/libvpxdec.c

   1 /*
   2  * Copyright (c) 2010, Google, Inc.
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * Libav is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with Libav; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * VP8 decoder support via libvpx
  24  */
  25
  26 #define VPX_CODEC_DISABLE_COMPAT 1
  27 #include <vpx/vpx_decoder.h>
  28 #include <vpx/vp8dx.h>
  29
  30 #include "libavutil/common.h"
  31 #include "libavutil/imgutils.h"
  32 #include "avcodec.h"
  33 #include "internal.h"
  34 #include "libvpx.h"
  35
  36 typedef struct VP8DecoderContext {
  37     struct vpx_codec_ctx decoder;
  38 } VP8Context;
  39
  40 static av_cold int vpx_init(AVCodecContext *avctx,
  41                             const struct vpx_codec_iface *iface)
  42 {
  43     VP8Context *ctx = avctx->priv_data;
  44     struct vpx_codec_dec_cfg deccfg = {
  45         /* token partitions+1 would be a decent choice */
  46         .threads = FFMIN(avctx->thread_count, 16)
  47     };
  48
  49     av_log(avctx, AV_LOG_INFO, "%s\n", vpx_codec_version_str());
  50     av_log(avctx, AV_LOG_VERBOSE, "%s\n", vpx_codec_build_config());
  51
  52     if (vpx_codec_dec_init(&ctx->decoder, iface, &deccfg, 0) != VPX_CODEC_OK) {
  53         const char *error = vpx_codec_error(&ctx->decoder);
  54         av_log(avctx, AV_LOG_ERROR, "Failed to initialize decoder: %s\n",
  55                error);
  56         return AVERROR(EINVAL);
  57     }
  58
  59     return 0;
  60 }
  61
  62 static int vp8_decode(AVCodecContext *avctx,
  63                       void *data, int *got_frame, AVPacket *avpkt)
  64 {
  65     VP8Context *ctx = avctx->priv_data;
  66     AVFrame *picture = data;
  67     const void *iter = NULL;
  68     struct vpx_image *img;
  69     int ret;
  70
  71     if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) !=
  72         VPX_CODEC_OK) {
  73         const char *error  = vpx_codec_error(&ctx->decoder);
  74         const char *detail = vpx_codec_error_detail(&ctx->decoder);
  75
  76         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error);
  77         if (detail)
  78             av_log(avctx, AV_LOG_ERROR, "  Additional information: %s\n",
  79                    detail);
  80         return AVERROR_INVALIDDATA;
  81     }
  82
  83     if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) {
  84         avctx->pix_fmt = ff_vpx_imgfmt_to_pixfmt(img->fmt);
  85         if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
  86             av_log(avctx, AV_LOG_ERROR, "Unsupported output colorspace (%d)\n",
  87                    img->fmt);
  88             return AVERROR_INVALIDDATA;
  89         }
  90
  91         if ((int) img->d_w != avctx->width || (int) img->d_h != avctx->height) {
  92             av_log(avctx, AV_LOG_INFO, "dimension change! %dx%d -> %dx%d\n",
  93                    avctx->width, avctx->height, img->d_w, img->d_h);
  94             ret = ff_set_dimensions(avctx, img->d_w, img->d_h);
  95             if (ret < 0)
  96                 return ret;
  97         }
  98         if ((ret = ff_get_buffer(avctx, picture, 0)) < 0)
  99             return ret;
 100         av_image_copy(picture->data, picture->linesize, (const uint8_t **) img->planes,
 101                       img->stride, avctx->pix_fmt, img->d_w, img->d_h);
 102 #if VPX_IMAGE_ABI_VERSION >= 4
 103         switch (img->range) {
 104         case VPX_CR_STUDIO_RANGE:
 105             picture->color_range = AVCOL_RANGE_MPEG;
 106             break;
 107         case VPX_CR_FULL_RANGE:
 108             picture->color_range = AVCOL_RANGE_JPEG;
 109             break;
 110         }
 111 #endif
 112         *got_frame           = 1;
 113     }
 114     return avpkt->size;
 115 }
 116
 117 static av_cold int vp8_free(AVCodecContext *avctx)
 118 {
 119     VP8Context *ctx = avctx->priv_data;
 120     vpx_codec_destroy(&ctx->decoder);
 121     return 0;
 122 }
 123
 124 #if CONFIG_LIBVPX_VP8_DECODER
 125 static av_cold int vp8_init(AVCodecContext *avctx)
 126 {
 127     return vpx_init(avctx, &vpx_codec_vp8_dx_algo);
 128 }
 129
 130 AVCodec ff_libvpx_vp8_decoder = {
 131     .name           = "libvpx",
 132     .long_name      = NULL_IF_CONFIG_SMALL("libvpx VP8"),
 133     .type           = AVMEDIA_TYPE_VIDEO,
 134     .id             = AV_CODEC_ID_VP8,
 135     .priv_data_size = sizeof(VP8Context),
 136     .init           = vp8_init,
 137     .close          = vp8_free,
 138     .decode         = vp8_decode,
 139     .capabilities   = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
 140     .wrapper_name   = "libvpx",
 141 };
 142 #endif /* CONFIG_LIBVPX_VP8_DECODER */
 143
 144 #if CONFIG_LIBVPX_VP9_DECODER
 145 static av_cold int vp9_init(AVCodecContext *avctx)
 146 {
 147     return vpx_init(avctx, &vpx_codec_vp9_dx_algo);
 148 }
 149
 150 AVCodec ff_libvpx_vp9_decoder = {
 151     .name           = "libvpx-vp9",
 152     .long_name      = NULL_IF_CONFIG_SMALL("libvpx VP9"),
 153     .type           = AVMEDIA_TYPE_VIDEO,
 154     .id             = AV_CODEC_ID_VP9,
 155     .priv_data_size = sizeof(VP8Context),
 156     .init           = vp9_init,
 157     .close          = vp8_free,
 158     .decode         = vp8_decode,
 159     .capabilities   = AV_CODEC_CAP_AUTO_THREADS,
 160     .wrapper_name   = "libvpx",
 161 };
 162 #endif /* CONFIG_LIBVPX_VP9_DECODER */