aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/cbs_bsf.c
blob: 9b521cf111e55666e88caaeb4bfbe24c99a021ed (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "bsf_internal.h"
#include "cbs_bsf.h"

static int cbs_bsf_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
{
    CBSBSFContext           *ctx = bsf->priv_data;
    CodedBitstreamFragment *frag = &ctx->fragment;
    uint8_t *side_data;
    int side_data_size;
    int err;

    side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
                                        &side_data_size);
    if (!side_data_size)
        return 0;

    err = ff_cbs_read(ctx->input, frag, side_data, side_data_size);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR,
               "Failed to read extradata from packet side data.\n");
        return err;
    }

    err = ctx->type->update_fragment(bsf, NULL, frag);
    if (err < 0)
        return err;

    err = ff_cbs_write_fragment_data(ctx->output, frag);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR,
               "Failed to write extradata into packet side data.\n");
        return err;
    }

    side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
                                        frag->data_size);
    if (!side_data)
        return AVERROR(ENOMEM);
    memcpy(side_data, frag->data, frag->data_size);

    ff_cbs_fragment_reset(frag);
    return 0;
}

int ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt)
{
    CBSBSFContext           *ctx = bsf->priv_data;
    CodedBitstreamFragment *frag = &ctx->fragment;
    int err;

    err = ff_bsf_get_packet_ref(bsf, pkt);
    if (err < 0)
        return err;

    err = cbs_bsf_update_side_data(bsf, pkt);
    if (err < 0)
        goto fail;

    err = ff_cbs_read_packet(ctx->input, frag, pkt);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to read %s from packet.\n",
               ctx->type->fragment_name);
        goto fail;
    }

    if (frag->nb_units == 0) {
        av_log(bsf, AV_LOG_ERROR, "No %s found in packet.\n",
               ctx->type->unit_name);
        err = AVERROR_INVALIDDATA;
        goto fail;
    }

    err = ctx->type->update_fragment(bsf, pkt, frag);
    if (err < 0)
        goto fail;

    err = ff_cbs_write_packet(ctx->output, pkt, frag);
    if (err < 0) {
        av_log(bsf, AV_LOG_ERROR, "Failed to write %s into packet.\n",
               ctx->type->fragment_name);
        goto fail;
    }

    err = 0;
fail:
    ff_cbs_fragment_reset(frag);

    if (err < 0)
        av_packet_unref(pkt);

    return err;
}

int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)
{
    CBSBSFContext           *ctx = bsf->priv_data;
    CodedBitstreamFragment *frag = &ctx->fragment;
    int err;

    ctx->type = type;

    err = ff_cbs_init(&ctx->input, type->codec_id, bsf);
    if (err < 0)
        return err;

    err = ff_cbs_init(&ctx->output, type->codec_id, bsf);
    if (err < 0)
        return err;

    if (bsf->par_in->extradata) {
        err = ff_cbs_read_extradata(ctx->input, frag, bsf->par_in);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
            goto fail;
        }

        err = type->update_fragment(bsf, NULL, frag);
        if (err < 0)
            goto fail;

        err = ff_cbs_write_extradata(ctx->output, bsf->par_out, frag);
        if (err < 0) {
            av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
            goto fail;
        }
    }

    err = 0;
fail:
    ff_cbs_fragment_reset(frag);
    return err;
}

void ff_cbs_bsf_generic_close(AVBSFContext *bsf)
{
    CBSBSFContext *ctx = bsf->priv_data;

    ff_cbs_fragment_free(&ctx->fragment);
    ff_cbs_close(&ctx->input);
    ff_cbs_close(&ctx->output);
}