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.h"
20 #include "bsf_internal.h"
21 #include "cbs_bsf.h"
22
cbs_bsf_update_side_data(AVBSFContext *bsf, AVPacket *pkt)23 static int cbs_bsf_update_side_data(AVBSFContext *bsf, AVPacket *pkt)
24 {
25 CBSBSFContext *ctx = bsf->priv_data;
26 CodedBitstreamFragment *frag = &ctx->fragment;
27 uint8_t *side_data;
28 int err;
29
30 if (!av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, NULL))
31 return 0;
32
33 err = ff_cbs_read_packet_side_data(ctx->input, frag, pkt);
34 if (err < 0) {
35 av_log(bsf, AV_LOG_ERROR,
36 "Failed to read extradata from packet side data.\n");
37 return err;
38 }
39
40 err = ctx->type->update_fragment(bsf, NULL, frag);
41 if (err < 0)
42 return err;
43
44 err = ff_cbs_write_fragment_data(ctx->output, frag);
45 if (err < 0) {
46 av_log(bsf, AV_LOG_ERROR,
47 "Failed to write extradata into packet side data.\n");
48 return err;
49 }
50
51 side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
52 frag->data_size);
53 if (!side_data)
54 return AVERROR(ENOMEM);
55 memcpy(side_data, frag->data, frag->data_size);
56
57 ff_cbs_fragment_reset(frag);
58 return 0;
59 }
60
ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt)61 int ff_cbs_bsf_generic_filter(AVBSFContext *bsf, AVPacket *pkt)
62 {
63 CBSBSFContext *ctx = bsf->priv_data;
64 CodedBitstreamFragment *frag = &ctx->fragment;
65 int err;
66
67 err = ff_bsf_get_packet_ref(bsf, pkt);
68 if (err < 0)
69 return err;
70
71 err = cbs_bsf_update_side_data(bsf, pkt);
72 if (err < 0)
73 goto fail;
74
75 err = ff_cbs_read_packet(ctx->input, frag, pkt);
76 if (err < 0) {
77 av_log(bsf, AV_LOG_ERROR, "Failed to read %s from packet.\n",
78 ctx->type->fragment_name);
79 goto fail;
80 }
81
82 if (frag->nb_units == 0) {
83 av_log(bsf, AV_LOG_ERROR, "No %s found in packet.\n",
84 ctx->type->unit_name);
85 err = AVERROR_INVALIDDATA;
86 goto fail;
87 }
88
89 err = ctx->type->update_fragment(bsf, pkt, frag);
90 if (err < 0)
91 goto fail;
92
93 err = ff_cbs_write_packet(ctx->output, pkt, frag);
94 if (err < 0) {
95 av_log(bsf, AV_LOG_ERROR, "Failed to write %s into packet.\n",
96 ctx->type->fragment_name);
97 goto fail;
98 }
99
100 err = 0;
101 fail:
102 ff_cbs_fragment_reset(frag);
103
104 if (err < 0)
105 av_packet_unref(pkt);
106
107 return err;
108 }
109
ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)110 int ff_cbs_bsf_generic_init(AVBSFContext *bsf, const CBSBSFType *type)
111 {
112 CBSBSFContext *ctx = bsf->priv_data;
113 CodedBitstreamFragment *frag = &ctx->fragment;
114 int err;
115
116 ctx->type = type;
117
118 err = ff_cbs_init(&ctx->input, type->codec_id, bsf);
119 if (err < 0)
120 return err;
121
122 err = ff_cbs_init(&ctx->output, type->codec_id, bsf);
123 if (err < 0)
124 return err;
125
126 if (bsf->par_in->extradata) {
127 err = ff_cbs_read_extradata(ctx->input, frag, bsf->par_in);
128 if (err < 0) {
129 av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
130 goto fail;
131 }
132
133 err = type->update_fragment(bsf, NULL, frag);
134 if (err < 0)
135 goto fail;
136
137 err = ff_cbs_write_extradata(ctx->output, bsf->par_out, frag);
138 if (err < 0) {
139 av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
140 goto fail;
141 }
142 }
143
144 err = 0;
145 fail:
146 ff_cbs_fragment_reset(frag);
147 return err;
148 }
149
ff_cbs_bsf_generic_close(AVBSFContext *bsf)150 void ff_cbs_bsf_generic_close(AVBSFContext *bsf)
151 {
152 CBSBSFContext *ctx = bsf->priv_data;
153
154 ff_cbs_fragment_free(&ctx->fragment);
155 ff_cbs_close(&ctx->input);
156 ff_cbs_close(&ctx->output);
157 }
158