FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/s302menc.c	Lines:	48	93	51.6 %
Date:	2021-01-20 23:14:43	Branches:	16	49	32.7 %


/*
 * SMPTE 302M encoder
 * Copyright (c) 2010 Google, Inc.
 * Copyright (c) 2013 Darryl Wallace <wallacdj@gmail.com>
 *
 * 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 "avcodec.h"
#include "internal.h"
#include "mathops.h"
#include "put_bits.h"

#define AES3_HEADER_LEN 4

typedef struct S302MEncContext {
    uint8_t framing_index; /* Set for even channels on multiple of 192 samples */
} S302MEncContext;

static av_cold int s302m_encode_init(AVCodecContext *avctx)
{
    S302MEncContext *s = avctx->priv_data;

    if (avctx->channels & 1 || avctx->channels > 8) {
        av_log(avctx, AV_LOG_ERROR,
               "Encoding %d channel(s) is not allowed. Only 2, 4, 6 and 8 channels are supported.\n",
               avctx->channels);
        return AVERROR(EINVAL);
    }

    switch (avctx->sample_fmt) {
    case AV_SAMPLE_FMT_S16:
        avctx->bits_per_raw_sample = 16;
        break;
    case AV_SAMPLE_FMT_S32:
        if (avctx->bits_per_raw_sample > 20) {
            if (avctx->bits_per_raw_sample > 24)
                av_log(avctx, AV_LOG_WARNING, "encoding as 24 bits-per-sample\n");
            avctx->bits_per_raw_sample = 24;
        } else if (!avctx->bits_per_raw_sample) {
            avctx->bits_per_raw_sample = 24;
        } else if (avctx->bits_per_raw_sample <= 20) {
            avctx->bits_per_raw_sample = 20;
        }
    }

    avctx->frame_size = 0;
    avctx->bit_rate   = 48000 * avctx->channels *
                       (avctx->bits_per_raw_sample + 4);
    s->framing_index  = 0;

    return 0;
}

static int s302m_encode2_frame(AVCodecContext *avctx, AVPacket *avpkt,
                               const AVFrame *frame, int *got_packet_ptr)
{
    S302MEncContext *s = avctx->priv_data;
    const int buf_size = AES3_HEADER_LEN +
                        (frame->nb_samples *
                         avctx->channels *
                        (avctx->bits_per_raw_sample + 4)) / 8;
    int ret, c, channels;
    uint8_t *o;
    PutBitContext pb;

    if (buf_size - AES3_HEADER_LEN > UINT16_MAX) {
        av_log(avctx, AV_LOG_ERROR, "number of samples in frame too big\n");
        return AVERROR(EINVAL);
    }

    if ((ret = ff_alloc_packet2(avctx, avpkt, buf_size, 0)) < 0)
        return ret;

    o = avpkt->data;
    init_put_bits(&pb, o, buf_size);
    put_bits(&pb, 16, buf_size - AES3_HEADER_LEN);
    put_bits(&pb, 2, (avctx->channels - 2) >> 1);   // number of channels
    put_bits(&pb, 8, 0);                            // channel ID
    put_bits(&pb, 2, (avctx->bits_per_raw_sample - 16) / 4); // bits per samples (0 = 16bit, 1 = 20bit, 2 = 24bit)
    put_bits(&pb, 4, 0);                            // alignments
    flush_put_bits(&pb);
    o += AES3_HEADER_LEN;

    if (avctx->bits_per_raw_sample == 24) {
        const uint32_t *samples = (uint32_t *)frame->data[0];

        for (c = 0; c < frame->nb_samples; c++) {
            uint8_t vucf = s->framing_index == 0 ? 0x10: 0;

            for (channels = 0; channels < avctx->channels; channels += 2) {
                o[0] = ff_reverse[(samples[0] & 0x0000FF00) >> 8];
                o[1] = ff_reverse[(samples[0] & 0x00FF0000) >> 16];
                o[2] = ff_reverse[(samples[0] & 0xFF000000) >> 24];
                o[3] = ff_reverse[(samples[1] & 0x00000F00) >> 4] | vucf;
                o[4] = ff_reverse[(samples[1] & 0x000FF000) >> 12];
                o[5] = ff_reverse[(samples[1] & 0x0FF00000) >> 20];
                o[6] = ff_reverse[(samples[1] & 0xF0000000) >> 28];
                o += 7;
                samples += 2;
            }

            s->framing_index++;
            if (s->framing_index >= 192)
                s->framing_index = 0;
        }
    } else if (avctx->bits_per_raw_sample == 20) {
        const uint32_t *samples = (uint32_t *)frame->data[0];

        for (c = 0; c < frame->nb_samples; c++) {
            uint8_t vucf = s->framing_index == 0 ? 0x80: 0;

            for (channels = 0; channels < avctx->channels; channels += 2) {
                o[0] = ff_reverse[ (samples[0] & 0x000FF000) >> 12];
                o[1] = ff_reverse[ (samples[0] & 0x0FF00000) >> 20];
                o[2] = ff_reverse[((samples[0] & 0xF0000000) >> 28) | vucf];
                o[3] = ff_reverse[ (samples[1] & 0x000FF000) >> 12];
                o[4] = ff_reverse[ (samples[1] & 0x0FF00000) >> 20];
                o[5] = ff_reverse[ (samples[1] & 0xF0000000) >> 28];
                o += 6;
                samples += 2;
            }

            s->framing_index++;
            if (s->framing_index >= 192)
                s->framing_index = 0;
        }
    } else if (avctx->bits_per_raw_sample == 16) {
        const uint16_t *samples = (uint16_t *)frame->data[0];

        for (c = 0; c < frame->nb_samples; c++) {
            uint8_t vucf = s->framing_index == 0 ? 0x10 : 0;

            for (channels = 0; channels < avctx->channels; channels += 2) {
                o[0] = ff_reverse[ samples[0] & 0xFF];
                o[1] = ff_reverse[(samples[0] & 0xFF00) >>  8];
                o[2] = ff_reverse[(samples[1] & 0x0F)   <<  4] | vucf;
                o[3] = ff_reverse[(samples[1] & 0x0FF0) >>  4];
                o[4] = ff_reverse[(samples[1] & 0xF000) >> 12];
                o += 5;
                samples += 2;

            }

            s->framing_index++;
            if (s->framing_index >= 192)
                s->framing_index = 0;
        }
    }

    *got_packet_ptr = 1;

    return 0;
}

AVCodec ff_s302m_encoder = {
    .name                  = "s302m",
    .long_name             = NULL_IF_CONFIG_SMALL("SMPTE 302M"),
    .type                  = AVMEDIA_TYPE_AUDIO,
    .id                    = AV_CODEC_ID_S302M,
    .priv_data_size        = sizeof(S302MEncContext),
    .init                  = s302m_encode_init,
    .encode2               = s302m_encode2_frame,
    .sample_fmts           = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32,
                                                            AV_SAMPLE_FMT_S16,
                                                            AV_SAMPLE_FMT_NONE },
    .capabilities          = AV_CODEC_CAP_VARIABLE_FRAME_SIZE | AV_CODEC_CAP_EXPERIMENTAL,
    .supported_samplerates = (const int[]) { 48000, 0 },
 /* .channel_layouts       = (const uint64_t[]) { AV_CH_LAYOUT_STEREO,
                                                  AV_CH_LAYOUT_QUAD,
                                                  AV_CH_LAYOUT_5POINT1_BACK,
                                                  AV_CH_LAYOUT_5POINT1_BACK | AV_CH_LAYOUT_STEREO_DOWNMIX,
                                                  0 }, */
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* SMPTE 302M encoder
3			* Copyright (c) 2010 Google, Inc.
4			* Copyright (c) 2013 Darryl Wallace <wallacdj@gmail.com>
5			*
6			* This file is part of FFmpeg.
7			*
8			* FFmpeg is free software; you can redistribute it and/or
9			* modify it under the terms of the GNU Lesser General Public
10			* License as published by the Free Software Foundation; either
11			* version 2.1 of the License, or (at your option) any later version.
12			*
13			* FFmpeg is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16			* Lesser General Public License for more details.
17			*
18			* You should have received a copy of the GNU Lesser General Public
19			* License along with FFmpeg; if not, write to the Free Software
20			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*/
22
23			#include "avcodec.h"
24			#include "internal.h"
25			#include "mathops.h"
26			#include "put_bits.h"
27
28			#define AES3_HEADER_LEN 4
29
30			typedef struct S302MEncContext {
31			uint8_t framing_index; /* Set for even channels on multiple of 192 samples */
32			} S302MEncContext;
33
34		1	static av_cold int s302m_encode_init(AVCodecContext *avctx)
35			{
36		1	S302MEncContext *s = avctx->priv_data;
37
38	✓✗✗✓	1	if (avctx->channels & 1 \|\| avctx->channels > 8) {
39			av_log(avctx, AV_LOG_ERROR,
40			"Encoding %d channel(s) is not allowed. Only 2, 4, 6 and 8 channels are supported.\n",
41			avctx->channels);
42			return AVERROR(EINVAL);
43			}
44
45	✓✗✗	1	switch (avctx->sample_fmt) {
46		1	case AV_SAMPLE_FMT_S16:
47		1	avctx->bits_per_raw_sample = 16;
48		1	break;
49			case AV_SAMPLE_FMT_S32:
50			if (avctx->bits_per_raw_sample > 20) {
51			if (avctx->bits_per_raw_sample > 24)
52			av_log(avctx, AV_LOG_WARNING, "encoding as 24 bits-per-sample\n");
53			avctx->bits_per_raw_sample = 24;
54			} else if (!avctx->bits_per_raw_sample) {
55			avctx->bits_per_raw_sample = 24;
56			} else if (avctx->bits_per_raw_sample <= 20) {
57			avctx->bits_per_raw_sample = 20;
58			}
59			}
60
61		1	avctx->frame_size = 0;
62		1	avctx->bit_rate = 48000 * avctx->channels *
63		1	(avctx->bits_per_raw_sample + 4);
64		1	s->framing_index = 0;
65
66		1	return 0;
67			}
68
69		260	static int s302m_encode2_frame(AVCodecContext avctx, AVPacket avpkt,
70			const AVFrame frame, int got_packet_ptr)
71			{
72		260	S302MEncContext *s = avctx->priv_data;
73		260	const int buf_size = AES3_HEADER_LEN +
74		260	(frame->nb_samples *
75		260	avctx->channels *
76		260	(avctx->bits_per_raw_sample + 4)) / 8;
77			int ret, c, channels;
78			uint8_t *o;
79			PutBitContext pb;
80
81	✗✓	260	if (buf_size - AES3_HEADER_LEN > UINT16_MAX) {
82			av_log(avctx, AV_LOG_ERROR, "number of samples in frame too big\n");
83			return AVERROR(EINVAL);
84			}
85
86	✗✓	260	if ((ret = ff_alloc_packet2(avctx, avpkt, buf_size, 0)) < 0)
87			return ret;
88
89		260	o = avpkt->data;
90		260	init_put_bits(&pb, o, buf_size);
91		260	put_bits(&pb, 16, buf_size - AES3_HEADER_LEN);
92		260	put_bits(&pb, 2, (avctx->channels - 2) >> 1); // number of channels
93		260	put_bits(&pb, 8, 0); // channel ID
94		260	put_bits(&pb, 2, (avctx->bits_per_raw_sample - 16) / 4); // bits per samples (0 = 16bit, 1 = 20bit, 2 = 24bit)
95		260	put_bits(&pb, 4, 0); // alignments
96		260	flush_put_bits(&pb);
97		260	o += AES3_HEADER_LEN;
98
99	✗✓	260	if (avctx->bits_per_raw_sample == 24) {
100			const uint32_t samples = (uint32_t )frame->data[0];
101
102			for (c = 0; c < frame->nb_samples; c++) {
103			uint8_t vucf = s->framing_index == 0 ? 0x10: 0;
104
105			for (channels = 0; channels < avctx->channels; channels += 2) {
106			o[0] = ff_reverse[(samples[0] & 0x0000FF00) >> 8];
107			o[1] = ff_reverse[(samples[0] & 0x00FF0000) >> 16];
108			o[2] = ff_reverse[(samples[0] & 0xFF000000) >> 24];
109			o[3] = ff_reverse[(samples[1] & 0x00000F00) >> 4] \| vucf;
110			o[4] = ff_reverse[(samples[1] & 0x000FF000) >> 12];
111			o[5] = ff_reverse[(samples[1] & 0x0FF00000) >> 20];
112			o[6] = ff_reverse[(samples[1] & 0xF0000000) >> 28];
113			o += 7;
114			samples += 2;
115			}
116
117			s->framing_index++;
118			if (s->framing_index >= 192)
119			s->framing_index = 0;
120			}
121	✗✓	260	} else if (avctx->bits_per_raw_sample == 20) {
122			const uint32_t samples = (uint32_t )frame->data[0];
123
124			for (c = 0; c < frame->nb_samples; c++) {
125			uint8_t vucf = s->framing_index == 0 ? 0x80: 0;
126
127			for (channels = 0; channels < avctx->channels; channels += 2) {
128			o[0] = ff_reverse[ (samples[0] & 0x000FF000) >> 12];
129			o[1] = ff_reverse[ (samples[0] & 0x0FF00000) >> 20];
130			o[2] = ff_reverse[((samples[0] & 0xF0000000) >> 28) \| vucf];
131			o[3] = ff_reverse[ (samples[1] & 0x000FF000) >> 12];
132			o[4] = ff_reverse[ (samples[1] & 0x0FF00000) >> 20];
133			o[5] = ff_reverse[ (samples[1] & 0xF0000000) >> 28];
134			o += 6;
135			samples += 2;
136			}
137
138			s->framing_index++;
139			if (s->framing_index >= 192)
140			s->framing_index = 0;
141			}
142	✓✗	260	} else if (avctx->bits_per_raw_sample == 16) {
143		260	const uint16_t samples = (uint16_t )frame->data[0];
144
145	✓✓	288260	for (c = 0; c < frame->nb_samples; c++) {
146	✓✓	288000	uint8_t vucf = s->framing_index == 0 ? 0x10 : 0;
147
148	✓✓	576000	for (channels = 0; channels < avctx->channels; channels += 2) {
149		288000	o[0] = ff_reverse[ samples[0] & 0xFF];
150		288000	o[1] = ff_reverse[(samples[0] & 0xFF00) >> 8];
151		288000	o[2] = ff_reverse[(samples[1] & 0x0F) << 4] \| vucf;
152		288000	o[3] = ff_reverse[(samples[1] & 0x0FF0) >> 4];
153		288000	o[4] = ff_reverse[(samples[1] & 0xF000) >> 12];
154		288000	o += 5;
155		288000	samples += 2;
156
157			}
158
159		288000	s->framing_index++;
160	✓✓	288000	if (s->framing_index >= 192)
161		1500	s->framing_index = 0;
162			}
163			}
164
165		260	*got_packet_ptr = 1;
166
167		260	return 0;
168			}
169
170			AVCodec ff_s302m_encoder = {
171			.name = "s302m",
172			.long_name = NULL_IF_CONFIG_SMALL("SMPTE 302M"),
173			.type = AVMEDIA_TYPE_AUDIO,
174			.id = AV_CODEC_ID_S302M,
175			.priv_data_size = sizeof(S302MEncContext),
176			.init = s302m_encode_init,
177			.encode2 = s302m_encode2_frame,
178			.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32,
179			AV_SAMPLE_FMT_S16,
180			AV_SAMPLE_FMT_NONE },
181			.capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE \| AV_CODEC_CAP_EXPERIMENTAL,
182			.supported_samplerates = (const int[]) { 48000, 0 },
183			/* .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_STEREO,
184			AV_CH_LAYOUT_QUAD,
185			AV_CH_LAYOUT_5POINT1_BACK,
186			AV_CH_LAYOUT_5POINT1_BACK \| AV_CH_LAYOUT_STEREO_DOWNMIX,
187			0 }, */
188			};