1 /*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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 <string.h>
22
23 #include "avcodec.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/mem.h"
26 #include "libavutil/opt.h"
27
28 #if FF_API_OLD_BSF
29 FF_DISABLE_DEPRECATION_WARNINGS
30
av_bitstream_filter_next(const AVBitStreamFilter * f)31 const AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
32 {
33 const AVBitStreamFilter *filter = NULL;
34 void *opaque = NULL;
35
36 while (filter != f)
37 filter = av_bsf_iterate(&opaque);
38
39 return av_bsf_iterate(&opaque);
40 }
41
av_register_bitstream_filter(AVBitStreamFilter * bsf)42 void av_register_bitstream_filter(AVBitStreamFilter *bsf)
43 {
44 }
45
46 typedef struct BSFCompatContext {
47 AVBSFContext *ctx;
48 int extradata_updated;
49 } BSFCompatContext;
50
av_bitstream_filter_init(const char * name)51 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
52 {
53 AVBitStreamFilterContext *ctx = NULL;
54 BSFCompatContext *priv = NULL;
55 const AVBitStreamFilter *bsf;
56
57 bsf = av_bsf_get_by_name(name);
58 if (!bsf)
59 return NULL;
60
61 ctx = av_mallocz(sizeof(*ctx));
62 if (!ctx)
63 return NULL;
64
65 priv = av_mallocz(sizeof(*priv));
66 if (!priv)
67 goto fail;
68
69
70 ctx->filter = bsf;
71 ctx->priv_data = priv;
72
73 return ctx;
74
75 fail:
76 if (priv)
77 av_bsf_free(&priv->ctx);
78 av_freep(&priv);
79 av_freep(&ctx);
80 return NULL;
81 }
82
av_bitstream_filter_close(AVBitStreamFilterContext * bsfc)83 void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
84 {
85 BSFCompatContext *priv;
86
87 if (!bsfc)
88 return;
89
90 priv = bsfc->priv_data;
91
92 av_bsf_free(&priv->ctx);
93 av_freep(&bsfc->priv_data);
94 av_free(bsfc);
95 }
96
av_bitstream_filter_filter(AVBitStreamFilterContext * bsfc,AVCodecContext * avctx,const char * args,uint8_t ** poutbuf,int * poutbuf_size,const uint8_t * buf,int buf_size,int keyframe)97 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
98 AVCodecContext *avctx, const char *args,
99 uint8_t **poutbuf, int *poutbuf_size,
100 const uint8_t *buf, int buf_size, int keyframe)
101 {
102 BSFCompatContext *priv = bsfc->priv_data;
103 AVPacket pkt = { 0 };
104 int ret;
105
106 if (!priv->ctx) {
107 ret = av_bsf_alloc(bsfc->filter, &priv->ctx);
108 if (ret < 0)
109 return ret;
110
111 ret = avcodec_parameters_from_context(priv->ctx->par_in, avctx);
112 if (ret < 0)
113 return ret;
114
115 priv->ctx->time_base_in = avctx->time_base;
116
117 if (bsfc->args && bsfc->filter->priv_class) {
118 const AVOption *opt = av_opt_next(priv->ctx->priv_data, NULL);
119 const char * shorthand[2] = {NULL};
120
121 if (opt)
122 shorthand[0] = opt->name;
123
124 ret = av_opt_set_from_string(priv->ctx->priv_data, bsfc->args, shorthand, "=", ":");
125 if (ret < 0)
126 return ret;
127 }
128
129 ret = av_bsf_init(priv->ctx);
130 if (ret < 0)
131 return ret;
132 }
133
134 pkt.data = (uint8_t *)buf;
135 pkt.size = buf_size;
136
137 ret = av_bsf_send_packet(priv->ctx, &pkt);
138 if (ret < 0)
139 return ret;
140
141 *poutbuf = NULL;
142 *poutbuf_size = 0;
143
144 ret = av_bsf_receive_packet(priv->ctx, &pkt);
145 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
146 return 0;
147 else if (ret < 0)
148 return ret;
149
150 *poutbuf = av_malloc(pkt.size + AV_INPUT_BUFFER_PADDING_SIZE);
151 if (!*poutbuf) {
152 av_packet_unref(&pkt);
153 return AVERROR(ENOMEM);
154 }
155
156 *poutbuf_size = pkt.size;
157 memcpy(*poutbuf, pkt.data, pkt.size);
158
159 av_packet_unref(&pkt);
160
161 /* drain all the remaining packets we cannot return */
162 while (ret >= 0) {
163 ret = av_bsf_receive_packet(priv->ctx, &pkt);
164 av_packet_unref(&pkt);
165 }
166
167 if (!priv->extradata_updated) {
168 /* update extradata in avctx from the output codec parameters */
169 if (priv->ctx->par_out->extradata_size && (!args || !strstr(args, "private_spspps_buf"))) {
170 av_freep(&avctx->extradata);
171 avctx->extradata_size = 0;
172 avctx->extradata = av_mallocz(priv->ctx->par_out->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
173 if (!avctx->extradata)
174 return AVERROR(ENOMEM);
175 memcpy(avctx->extradata, priv->ctx->par_out->extradata, priv->ctx->par_out->extradata_size);
176 avctx->extradata_size = priv->ctx->par_out->extradata_size;
177 }
178
179 priv->extradata_updated = 1;
180 }
181
182 return 1;
183 }
184 FF_ENABLE_DEPRECATION_WARNINGS
185 #endif
186