FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/av1_frame_merge_bsf.c
Date: 2021-09-24 03:35:22
Exec Total Coverage
Lines: 51 75 68.0%
Branches: 28 44 63.6%

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1 /*
2 * Copyright (c) 2019 James Almer <jamrial@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 #include "bsf.h"
22 #include "bsf_internal.h"
23 #include "cbs.h"
24 #include "cbs_av1.h"
25
26 typedef struct AV1FMergeContext {
27 CodedBitstreamContext *input;
28 CodedBitstreamContext *output;
29 CodedBitstreamFragment frag[2];
30 AVPacket *pkt, *in;
31 int idx;
32 } AV1FMergeContext;
33
34 static void av1_frame_merge_flush(AVBSFContext *bsf)
35 {
36 AV1FMergeContext *ctx = bsf->priv_data;
37
38 ff_cbs_fragment_reset(&ctx->frag[0]);
39 ff_cbs_fragment_reset(&ctx->frag[1]);
40 av_packet_unref(ctx->in);
41 av_packet_unref(ctx->pkt);
42 }
43
44 24 static int av1_frame_merge_filter(AVBSFContext *bsf, AVPacket *out)
45 {
46 24 AV1FMergeContext *ctx = bsf->priv_data;
47 24 CodedBitstreamFragment *frag = &ctx->frag[ctx->idx], *tu = &ctx->frag[!ctx->idx];
48 24 AVPacket *in = ctx->in, *buffer_pkt = ctx->pkt;
49 int err, i;
50
51 24 err = ff_bsf_get_packet_ref(bsf, in);
52
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24 if (err < 0) {
53
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2 if (err == AVERROR_EOF && tu->nb_units > 0)
54 1 goto eof;
55 1 return err;
56 }
57
58 22 err = ff_cbs_read_packet(ctx->input, frag, in);
59
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22 if (err < 0) {
60 av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
61 goto fail;
62 }
63
64
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22 if (frag->nb_units == 0) {
65 av_log(bsf, AV_LOG_ERROR, "No OBU in packet.\n");
66 err = AVERROR_INVALIDDATA;
67 goto fail;
68 }
69
70
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22 if (tu->nb_units == 0 && frag->units[0].type != AV1_OBU_TEMPORAL_DELIMITER) {
71 av_log(bsf, AV_LOG_ERROR, "Missing Temporal Delimiter.\n");
72 err = AVERROR_INVALIDDATA;
73 goto fail;
74 }
75
76
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22 for (i = 1; i < frag->nb_units; i++) {
77 if (frag->units[i].type == AV1_OBU_TEMPORAL_DELIMITER) {
78 av_log(bsf, AV_LOG_ERROR, "Temporal Delimiter in the middle of a packet.\n");
79 err = AVERROR_INVALIDDATA;
80 goto fail;
81 }
82 }
83
84
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22 if (tu->nb_units > 0 && frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
85 9 eof:
86 10 err = ff_cbs_write_packet(ctx->output, buffer_pkt, tu);
87
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10 if (err < 0) {
88 av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
89 goto fail;
90 }
91 10 av_packet_move_ref(out, buffer_pkt);
92
93 // Swap fragment index, to avoid copying fragment references.
94 10 ctx->idx = !ctx->idx;
95 } else {
96
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26 for (i = 0; i < frag->nb_units; i++) {
97 13 err = ff_cbs_insert_unit_content(tu, -1, frag->units[i].type,
98 13 frag->units[i].content, frag->units[i].content_ref);
99
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13 if (err < 0)
100 goto fail;
101 }
102
103 13 err = AVERROR(EAGAIN);
104 }
105
106 /* Buffer packets with timestamps (there should be at most one per TU)
107 * or any packet if buffer_pkt is empty. The latter is needed to
108 * passthrough positions in case there are no timestamps like with
109 * the raw OBU demuxer. */
110
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23 if (!buffer_pkt->data ||
111
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12 in->pts != AV_NOPTS_VALUE && buffer_pkt->pts == AV_NOPTS_VALUE) {
112 11 av_packet_unref(buffer_pkt);
113 11 av_packet_move_ref(buffer_pkt, in);
114 } else
115 12 av_packet_unref(in);
116
117 23 ff_cbs_fragment_reset(&ctx->frag[ctx->idx]);
118
119 23 fail:
120
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23 if (err < 0 && err != AVERROR(EAGAIN))
121 av1_frame_merge_flush(bsf);
122
123 23 return err;
124 }
125
126 1 static int av1_frame_merge_init(AVBSFContext *bsf)
127 {
128 1 AV1FMergeContext *ctx = bsf->priv_data;
129 int err;
130
131 1 ctx->in = av_packet_alloc();
132 1 ctx->pkt = av_packet_alloc();
133
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1 if (!ctx->in || !ctx->pkt)
134 return AVERROR(ENOMEM);
135
136 1 err = ff_cbs_init(&ctx->input, AV_CODEC_ID_AV1, bsf);
137
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1 if (err < 0)
138 return err;
139
140 1 return ff_cbs_init(&ctx->output, AV_CODEC_ID_AV1, bsf);
141 }
142
143 1 static void av1_frame_merge_close(AVBSFContext *bsf)
144 {
145 1 AV1FMergeContext *ctx = bsf->priv_data;
146
147 1 ff_cbs_fragment_free(&ctx->frag[0]);
148 1 ff_cbs_fragment_free(&ctx->frag[1]);
149 1 av_packet_free(&ctx->in);
150 1 av_packet_free(&ctx->pkt);
151 1 ff_cbs_close(&ctx->input);
152 1 ff_cbs_close(&ctx->output);
153 1 }
154
155 static const enum AVCodecID av1_frame_merge_codec_ids[] = {
156 AV_CODEC_ID_AV1, AV_CODEC_ID_NONE,
157 };
158
159 const AVBitStreamFilter ff_av1_frame_merge_bsf = {
160 .name = "av1_frame_merge",
161 .priv_data_size = sizeof(AV1FMergeContext),
162 .init = av1_frame_merge_init,
163 .flush = av1_frame_merge_flush,
164 .close = av1_frame_merge_close,
165 .filter = av1_frame_merge_filter,
166 .codec_ids = av1_frame_merge_codec_ids,
167 };
168