| 1 | /* |
| 2 | * Copyright (c) 2010, Google, Inc. |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static int vp8_decode(AVCodecContext *avctx, |
| 64 | void *data, int *got_frame, AVPacket *avpkt) |
| 65 | { |
| 66 | VP8Context *ctx = avctx->priv_data; |
| 67 | AVFrame *picture = data; |
| 68 | const void *iter = NULL; |
| 69 | struct vpx_image *img; |
| 70 | int ret; |
| 71 | |
| 72 | if (vpx_codec_decode(&ctx->decoder, avpkt->data, avpkt->size, NULL, 0) != |
| 73 | VPX_CODEC_OK) { |
| 74 | const char *error = vpx_codec_error(&ctx->decoder); |
| 75 | const char *detail = vpx_codec_error_detail(&ctx->decoder); |
| 76 | |
| 77 | av_log(avctx, AV_LOG_ERROR, "Failed to decode frame: %s\n", error); |
| 78 | if (detail) |
| 79 | av_log(avctx, AV_LOG_ERROR, " Additional information: %s\n", |
| 80 | detail); |
| 81 | return AVERROR_INVALIDDATA; |
| 82 | } |
| 83 | |
| 84 | if ((img = vpx_codec_get_frame(&ctx->decoder, &iter))) { |
| 85 | if (img->fmt != VPX_IMG_FMT_I420) { |
| 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 | *got_frame = 1; |
| 103 | } |
| 104 | return avpkt->size; |
| 105 | } |
| 106 | |
| 107 | static av_cold int vp8_free(AVCodecContext *avctx) |
| 108 | { |
| 109 | VP8Context *ctx = avctx->priv_data; |
| 110 | vpx_codec_destroy(&ctx->decoder); |
| 111 | return 0; |
| 112 | } |
| 113 | |
| 114 | #if CONFIG_LIBVPX_VP8_DECODER |
| 115 | static av_cold int vp8_init(AVCodecContext *avctx) |
| 116 | { |
| 117 | return vpx_init(avctx, &vpx_codec_vp8_dx_algo); |
| 118 | } |
| 119 | |
| 120 | AVCodec ff_libvpx_vp8_decoder = { |
| 121 | .name = "libvpx", |
| 122 | .long_name = NULL_IF_CONFIG_SMALL("libvpx VP8"), |
| 123 | .type = AVMEDIA_TYPE_VIDEO, |
| 124 | .id = AV_CODEC_ID_VP8, |
| 125 | .priv_data_size = sizeof(VP8Context), |
| 126 | .init = vp8_init, |
| 127 | .close = vp8_free, |
| 128 | .decode = vp8_decode, |
| 129 | .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, |
| 130 | }; |
| 131 | #endif /* CONFIG_LIBVPX_VP8_DECODER */ |
| 132 | |
| 133 | #if CONFIG_LIBVPX_VP9_DECODER |
| 134 | static av_cold int vp9_init(AVCodecContext *avctx) |
| 135 | { |
| 136 | return vpx_init(avctx, &vpx_codec_vp9_dx_algo); |
| 137 | } |
| 138 | |
| 139 | AVCodec ff_libvpx_vp9_decoder = { |
| 140 | .name = "libvpx-vp9", |
| 141 | .long_name = NULL_IF_CONFIG_SMALL("libvpx VP9"), |
| 142 | .type = AVMEDIA_TYPE_VIDEO, |
| 143 | .id = AV_CODEC_ID_VP9, |
| 144 | .priv_data_size = sizeof(VP8Context), |
| 145 | .init = vp9_init, |
| 146 | .close = vp8_free, |
| 147 | .decode = vp8_decode, |
| 148 | .capabilities = CODEC_CAP_AUTO_THREADS | CODEC_CAP_DR1, |
| 149 | .init_static_data = ff_vp9_init_static, |
| 150 | }; |
| 151 | #endif /* CONFIG_LIBVPX_VP9_DECODER */ |