| 1 | /* |
| 2 | * Copyright 2011 Stefano Sabatini | stefasab at gmail.com |
| 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 | * libavcodec/libavfilter gluing utilities |
| 24 | */ |
| 25 | |
| 26 | #include "avcodec.h" |
| 27 | #include "libavutil/avassert.h" |
| 28 | #include "libavutil/channel_layout.h" |
| 29 | #include "libavutil/opt.h" |
| 30 | |
| 31 | #if FF_API_AVFILTERBUFFER |
| 32 | AVFilterBufferRef *avfilter_get_video_buffer_ref_from_frame(const AVFrame *frame, |
| 33 | int perms) |
| 34 | { |
| 35 | AVFilterBufferRef *picref = |
| 36 | avfilter_get_video_buffer_ref_from_arrays(frame->data, frame->linesize, perms, |
| 37 | frame->width, frame->height, |
| 38 | frame->format); |
| 39 | if (!picref) |
| 40 | return NULL; |
| 41 | if (avfilter_copy_frame_props(picref, frame) < 0) { |
| 42 | picref->buf->data[0] = NULL; |
| 43 | avfilter_unref_bufferp(&picref); |
| 44 | } |
| 45 | return picref; |
| 46 | } |
| 47 | |
| 48 | AVFilterBufferRef *avfilter_get_audio_buffer_ref_from_frame(const AVFrame *frame, |
| 49 | int perms) |
| 50 | { |
| 51 | AVFilterBufferRef *samplesref; |
| 52 | int channels = av_frame_get_channels(frame); |
| 53 | int64_t layout = av_frame_get_channel_layout(frame); |
| 54 | |
| 55 | if (layout && av_get_channel_layout_nb_channels(layout) != av_frame_get_channels(frame)) { |
| 56 | av_log(0, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n"); |
| 57 | return NULL; |
| 58 | } |
| 59 | |
| 60 | samplesref = avfilter_get_audio_buffer_ref_from_arrays_channels( |
| 61 | (uint8_t **)frame->extended_data, frame->linesize[0], perms, |
| 62 | frame->nb_samples, frame->format, channels, layout); |
| 63 | if (!samplesref) |
| 64 | return NULL; |
| 65 | if (avfilter_copy_frame_props(samplesref, frame) < 0) { |
| 66 | samplesref->buf->data[0] = NULL; |
| 67 | avfilter_unref_bufferp(&samplesref); |
| 68 | } |
| 69 | return samplesref; |
| 70 | } |
| 71 | |
| 72 | AVFilterBufferRef *avfilter_get_buffer_ref_from_frame(enum AVMediaType type, |
| 73 | const AVFrame *frame, |
| 74 | int perms) |
| 75 | { |
| 76 | switch (type) { |
| 77 | case AVMEDIA_TYPE_VIDEO: |
| 78 | return avfilter_get_video_buffer_ref_from_frame(frame, perms); |
| 79 | case AVMEDIA_TYPE_AUDIO: |
| 80 | return avfilter_get_audio_buffer_ref_from_frame(frame, perms); |
| 81 | default: |
| 82 | return NULL; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src) |
| 87 | { |
| 88 | int planes, nb_channels; |
| 89 | |
| 90 | if (!dst) |
| 91 | return AVERROR(EINVAL); |
| 92 | /* abort in case the src is NULL and dst is not, avoid inconsistent state in dst */ |
| 93 | av_assert0(src); |
| 94 | |
| 95 | memcpy(dst->data, src->data, sizeof(dst->data)); |
| 96 | memcpy(dst->linesize, src->linesize, sizeof(dst->linesize)); |
| 97 | |
| 98 | dst->pts = src->pts; |
| 99 | dst->format = src->format; |
| 100 | av_frame_set_pkt_pos(dst, src->pos); |
| 101 | |
| 102 | switch (src->type) { |
| 103 | case AVMEDIA_TYPE_VIDEO: |
| 104 | av_assert0(src->video); |
| 105 | dst->width = src->video->w; |
| 106 | dst->height = src->video->h; |
| 107 | dst->sample_aspect_ratio = src->video->sample_aspect_ratio; |
| 108 | dst->interlaced_frame = src->video->interlaced; |
| 109 | dst->top_field_first = src->video->top_field_first; |
| 110 | dst->key_frame = src->video->key_frame; |
| 111 | dst->pict_type = src->video->pict_type; |
| 112 | break; |
| 113 | case AVMEDIA_TYPE_AUDIO: |
| 114 | av_assert0(src->audio); |
| 115 | nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout); |
| 116 | planes = av_sample_fmt_is_planar(src->format) ? nb_channels : 1; |
| 117 | |
| 118 | if (planes > FF_ARRAY_ELEMS(dst->data)) { |
| 119 | dst->extended_data = av_mallocz_array(planes, sizeof(*dst->extended_data)); |
| 120 | if (!dst->extended_data) |
| 121 | return AVERROR(ENOMEM); |
| 122 | memcpy(dst->extended_data, src->extended_data, |
| 123 | planes * sizeof(*dst->extended_data)); |
| 124 | } else |
| 125 | dst->extended_data = dst->data; |
| 126 | dst->nb_samples = src->audio->nb_samples; |
| 127 | av_frame_set_sample_rate (dst, src->audio->sample_rate); |
| 128 | av_frame_set_channel_layout(dst, src->audio->channel_layout); |
| 129 | av_frame_set_channels (dst, src->audio->channels); |
| 130 | break; |
| 131 | default: |
| 132 | return AVERROR(EINVAL); |
| 133 | } |
| 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | #endif |