1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "bsf_internal.h"
20 #include "cbs_bsf.h"
21
cbs_bsf_update_side_data(AVBSFContext * bsf,AVPacket * pkt)22 static int cbs_bsf_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
23 {
24 CBSBSFContext *ctx = bsf->priv_data;
25 CodedBitstreamFragment *frag = &ctx->fragment;
26 uint8_t *side_data;
27 buffer_size_t side_data_size;
28 int err;
29
30 side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
31 &side_data_size);
32 if (!side_data_size)
33 return 0;
34
35 err = ff_cbs_read(ctx->input, frag, side_data, side_data_size);
36 if (err < 0) {
37 av_log(bsf, AV_LOG_ERROR,
38 "Failed to read extradata from packet side data.\n");
39 return err;
40 }
41
42 err = ctx->type->update_fragment(bsf, NULL, frag);
43 if (err < 0)
44 return err;
45
46 err = ff_cbs_write_fragment_data(ctx->output, frag);
47 if (err < 0) {
48 av_log(bsf, AV_LOG_ERROR,
49 "Failed to write extradata into packet side data.\n");
50 return err;
51 }
52
53 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
54 frag->data_size);
55 if (!side_data)
56 return AVERROR(ENOMEM);
57 memcpy(side_data, frag->data, frag->data_size);
58
59 ff_cbs_fragment_reset(frag);
60 return 0;
61 }
62
ff_cbs_bsf_generic_filter(AVBSFContext * bsf,AVPacket * pkt)63 int ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt)
64 {
65 CBSBSFContext *ctx = bsf->priv_data;
66 CodedBitstreamFragment *frag = &ctx->fragment;
67 int err;
68
69 err = ff_bsf_get_packet_ref(bsf, pkt);
70 if (err < 0)
71 return err;
72
73 err = cbs_bsf_update_side_data(bsf, pkt);
74 if (err < 0)
75 goto fail;
76
77 err = ff_cbs_read_packet(ctx->input, frag, pkt);
78 if (err < 0) {
79 av_log(bsf, AV_LOG_ERROR, "Failed to read %s from packet.\n",
80 ctx->type->fragment_name);
81 goto fail;
82 }
83
84 if (frag->nb_units == 0) {
85 av_log(bsf, AV_LOG_ERROR, "No %s found in packet.\n",
86 ctx->type->unit_name);
87 err = AVERROR_INVALIDDATA;
88 goto fail;
89 }
90
91 err = ctx->type->update_fragment(bsf, pkt, frag);
92 if (err < 0)
93 goto fail;
94
95 err = ff_cbs_write_packet(ctx->output, pkt, frag);
96 if (err < 0) {
97 av_log(bsf, AV_LOG_ERROR, "Failed to write %s into packet.\n",
98 ctx->type->fragment_name);
99 goto fail;
100 }
101
102 err = 0;
103 fail:
104 ff_cbs_fragment_reset(frag);
105
106 if (err < 0)
107 av_packet_unref(pkt);
108
109 return err;
110 }
111
ff_cbs_bsf_generic_init(AVBSFContext * bsf,const CBSBSFType * type)112 int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)
113 {
114 CBSBSFContext *ctx = bsf->priv_data;
115 CodedBitstreamFragment *frag = &ctx->fragment;
116 int err;
117
118 ctx->type = type;
119
120 err = ff_cbs_init(&ctx->input, type->codec_id, bsf);
121 if (err < 0)
122 return err;
123
124 err = ff_cbs_init(&ctx->output, type->codec_id, bsf);
125 if (err < 0)
126 return err;
127
128 if (bsf->par_in->extradata) {
129 err = ff_cbs_read_extradata(ctx->input, frag, bsf->par_in);
130 if (err < 0) {
131 av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
132 goto fail;
133 }
134
135 err = type->update_fragment(bsf, NULL, frag);
136 if (err < 0)
137 goto fail;
138
139 err = ff_cbs_write_extradata(ctx->output, bsf->par_out, frag);
140 if (err < 0) {
141 av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
142 goto fail;
143 }
144 }
145
146 err = 0;
147 fail:
148 ff_cbs_fragment_reset(frag);
149 return err;
150 }
151
ff_cbs_bsf_generic_close(AVBSFContext * bsf)152 void ff_cbs_bsf_generic_close(AVBSFContext *bsf)
153 {
154 CBSBSFContext *ctx = bsf->priv_data;
155
156 ff_cbs_fragment_free(&ctx->fragment);
157 ff_cbs_close(&ctx->input);
158 ff_cbs_close(&ctx->output);
159 }
160